Download Short Form Information - Neumann Studio Monitors

Digital FIR Controller
PRO C 28
Short Form Information
KLEIN + HUMMEL GmbH
Zeppelinstr. 12
73760 Ostfildern/Germany
engl 16/05/02
Tel.: + 49 - (0)711 - 45893 - 0
Fax: + 49 - (0)711 - 45893 - 35
email: [email protected]
http://www.klein-hummel.de
KLEIN + HUMMEL GmbH
KLEIN + HUMMEL
21.05.02
Digital FIR Controller
Contents:
Page
Concept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Front and Rear Controls and Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Signal Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Description of Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
The Integrated PEQ Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Performance Plots of the O 300 D Monitor with Pro C 28 Controlling . . . . . . . . . 11
Peak / RMS Limiter Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Connecting K + H Monitors and Subwoofers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.1 Surround System Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Operating Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Organization of Stored Parameter Setups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Room-Specific Parameter Setups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Optional IR Remote Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
(For additional in-depth information concerning the K + H Pro C 28 digital controller please
refer to the user’s manual)
1
KLEIN + HUMMEL GmbH
KLEIN + HUMMEL
21.05.02
Digital FIR Controller
Concept
Ø Stereo-4-Way digital loudspeaker controller designed for use with studio- and PAloudspeakers
Ø Special digital FIR filtering to realize a completely independent equalization of system
amplitude and phase (FIR = Finite Impulse Response)
Ø Possibility to achieve a so-called “linear phase” equalisation which results in a constant
group delay over the whole frequency range of the system!
Ø Additional IIR digital filter section included, providing user-definable equalization with
real-time adoption of changed parameters:
o Parametric EQ (PEQ) with 10 full parametric bands of equalization
independently for each channel (standard option)
o Room-EQ to allow an easy system setup in case of problematic speaker
positioning (standard option)
Ø Four separate digital limiters included in every single output channel:
o Peak limiter to avoid any distortion and loudspeaker damage by restricting the
peak power of the power amplifier
o RMS limiter to avoid any distortion and loudspeaker damage by restricting the
continuous power of the power amplifier
o Thermo limiter avoids any speaker damage caused by overheating of the voice
coil
o Excursion limiter avoids any speaker damage by preventing of too high cone
excursion
Ø Compact 19“ 2U rackmount unit
Ø All important settings at system setup are done automatically by loading the stored
parameter setup which is calculated individually for each studio monitor delivered
together with the Pro C 28
Ø All settings in the different menus of the Pro C 28 can be stored in a system setup
Ø Possibility to maximize the system performance in a given installation by creating
individual, so-called “room-specific” FIR filter setups which are able to consider nearly
every desired room equalization
2
KLEIN + HUMMEL GmbH
KLEIN + HUMMEL
21.05.02
Digital FIR Controller
Features
State-Of-The-Art Audio Technology and Performance
•
Symmetric analogue input stage with lowest noise figures and distortion
•
2 stacked AD converters (∆/Σ) on each channel (“Gain Ranging” technique) provide an input
dynamic range of more than 130 dB
•
Digital signal processing with 48 BIT precision
•
Latest generation DA converters (∆/Σ)
•
Smooth LP filtering after DA conversion guarantees a very musical and clear sound
•
High performance power supply provides double voltage regulation for each functional block
•
Wide connection possibilities for analogue and digital signals
•
Highest quality input transformer can be switched into the analogue inputs if desired (standard
option)
3
KLEIN + HUMMEL GmbH
KLEIN + HUMMEL
21.05.02
Digital FIR Controller
Wide Range of Applications:
1. PA-Controller with Type-Specific Parameter Setups
•
Parameter Setups for use with K + H loudspeakers and amplifiers available
à Almost every combination possible
à Very comfortable adjustment of delay and level when using subwoofers
à Because of FIR filters nearly every desired frequency response possible
•
Room and positioning equalization can be achieved easily by using the included IIR EQs
•
Possibility to realize the room and positioning equalization within individual calculated FIR
filter setups to maximize system performance
2. Studio controller with speaker-specific parameter setups
•
To upgrade analogue K + H studio monitors (i.e. K + H O 300 D)
•
“Speaker specific” means: The parameter setup will be calculated and optimized
individually for each monitor delivered
à State-of-the-art precision in loudspeaker equalization in a way which was never possible
before
à Room and positioning equalization can either be done by using the IIR EQ section, but
for maximum system performance it should be realized within the FIR filter setup
(creation of room-specific parameter setup necessary!)
à Simple connection between Pro C 28 and prepared K + H monitors like the model O 300
D via a single multicore cable with dedicated multiple pin XLR terminals
•
Easy system enhancement with one or more additional subwoofers
à Subwoofers will be considered in the parameter setup so that amplitude and phase
equalization is extended down to the lowest frequencies
à Very comfortable setting options to align level and phase between subwoofers and
satellites
3. One-Way Full Range Operation Mode
•
High end digital EQ with multiple delay options and a sophisticated limiter concept in a
single unit
à Equalization of non-K + H studio monitors and sound reinforcement systems
à Possibility to use the IIR EQ section and / or the integrated FIR filters to realize filters
with a linear run of the phase response
4
KLEIN + HUMMEL GmbH
KLEIN + HUMMEL
21.05.02
Digital FIR Controller
Extensive limiter concept
Every output channel (4 outputs left channel and four outputs right channel) features the following
limiter structures which work independently from another:
•
Digital peak and RMS limiter in „look-ahead“-technology with digital modelling of the power
amplifiers load-behaviour
à Short attack time constant for safely prevention of power amplifier clipping
à So-called „Controlled Overshoot“ allows using the full peak power of the amplifier
à RMS limiter restricts the maximum continuous power to the power amp’s max. value
•
Digital thermo and excursion limiter with modelling of voice-coil temperature run and cone
excursion
à Long attack time constant to match the heating of voice coil
à Prevention of thermal loudspeaker damage
à Prevention of too large cone excursion
•
All limiter settings are included within the parameter setup and will be loaded automatically at
system setup
Comfortable Operation
•
Easy stand-alone operation via the front panel controls
•
Alternatively operation via the remote control type RC-55 (optional feature)
•
Operation via IBM-compatible PC possible (RS-232 port integrated)
•
Software-based operating concept with only three menu trees:
o
MAIN Menu: Settings like Input Gain, Input Select, Mute, Parameter Setup,…
o
SYSTEM Menu: General system settings like Display Brightness, MIDI Settings, Software
Version,…
o
EQ Menu: Settings of the integrated IIR filter section (PEQ and room EQ)
•
Connection of several units via the internal MIDI port (IN, OUT, THROUGH) provides a
synchronous variation of all parameters (i.e. volume within a 5.1 surround setup)
•
New parameter setups can be transferred into the Pro C 28 by connecting a PC to the internal
RS-232 port
•
The internal memory is capable of storing up to 70 different parameter setups
•
Switching between different parameter setups can be done in real time during normal operation
•
Every setting of the Pro C 28 (even the selected parameter setup) can be stored within a
general system setup
•
The remote control provides direct-access selection of up to four different system setups
•
Optional memory module available for storing system setups to provide easy and save systemrecovering in case of failure
5
KLEIN + HUMMEL GmbH
KLEIN + HUMMEL
21.05.02
Digital FIR Controller
Front and Rear Controls and Connectors
Mains Switch
IR Sensor
Incremental
Encoder
Cursor Key
KLEIN HUMMEL
SHIFT
INPUT
REMOTE
LEFT
LEFT
-30 -24 -18 -12
-6
0
+6 +12 +18 +24
LIMIT
SUB
BASS
MID
HIGH
RIGHT
RIGHT
SYSTEM
MAIN
EQ
POWER
LOCKED
LED Bars for indicating
the input level
AD CLIP
MIDI
Limiter and
Status LED’s
VF-Display
Menu Select Keys
with dedicated LED
Cursor Keys and
Incremental Encoder
Type of built-in Line Driving
stages
Groundlift Switch
Analogue Signal Input
(L, R)
Analogue Outputs (L, R)
ANALOG INPUT
ANALOG OUTPUT
Special 3-Way Analogue Outputs
to connect K + H Monitors
transformer
balanced
electronically
balanced
RIGHT MULTICORE LEFT
GROUND
LIFT
Right
Right
MAINS
AC 230 V ~ 50 - 60 Hz
AC 117 V ~ 50 - 60 Hz
PIN 1
PIN 2
PIN 3
PIN
1 Low
2 Low
3 Mid
4 Mid
5 High
6 High
7 GND
KLEIN+HUMMEL
PRO C 28
24 BIT, STEREO 4 WAY FIR CONTROLLER
2 TIMES 14 BAND PARAMTETRIC EQ
KLEIN+HUMMEL GmbH D-73760 Ostfildern MADE IN GERMANY
CAUTION!
HIGH
+
-
electr.
bal.
MID
LOW
SUB
OUTPUT / THROUGH
INPUT
transformer
balanced
Left
To prevent the risk of fire and shock hazard don´t
expose this appliance to moisture and rain.
Do not open.
Refer to qualified service personnel for service.
DIGITAL
IN / OUT
RS 232 / MIDI
SETUP MEMORY MODULE
INPUT
Left
RESET
Max. power consumption 50 VA
Mains Supply
value
DIGITAL INSERT
IEC Mains
Socked
Slide switch to select the
analogue input mode
(transformer balanced or
electronically balanced)
Digital AES/EBU
Output
Digital S/PDIF Input
Digital AES/EBU
Input
Reset Key
25-PIN SUB-D Connector
(RS-232, MIDI, Memory
Module)
6
KLEIN + HUMMEL GmbH
KLEIN + HUMMEL
21.05.02
Digital FIR Controller
Signal Block Diagram (Simplified)
fs
IIR Section
fs
FIR Section
T
T
Master Delay
Channel Delay
High Output
Scaling
Room EQ
+
D
A
Hi
10 Band
Parametric IIR EQ
X-over + Speaker
FIR-EQ
24 Bit delta/sigma
DA (Dither/N.Sh.)
Peak / Thermo
Limiter
-
Symmetrical
Output Stage
High Output
(XLR-3)
fs
fs/4
Mid Output
Scaling
A
Mid
Analog
input
Digital
Input / Insert
Channel Delay
+
D
T
X-over + Speaker
FIR-EQ
24 Bit delta/sigma
DA (Dither/N.Sh.)
Peak / Thermo
Limiter
-
Symmetrical
Output Stage
Mid Output
(XLR-3)
(fs/4)*4
Output for
K + H Studio Monitors
(XLR-7)
fs/16
Low Output
Scaling
A
Low
Channel Delay
+
D
T
X-over + Speaker
FIR-EQ
24 Bit delta/sigma
DA (Dither/N.Sh.)
Peak / Thermo
Limiter
-
Symmetrical
Output Stage
Low Output
(XLR-3)
A
D
A
D
(fs/16)*16
Dual 24 Bit
delta/sigma
AD Converter
fs/16
Sub Output
Scaling
electr.
symm.
transf.
coupled
A
Sub
Channel Delay
+
D
T
X-over + Speaker
FIR-EQ
Peak / Thermo
Limiter
24 Bit delta/sigma
DA (Dither/N.Sh.)
-
Symmetrical
Output Stage
Sub Output
(XLR-3)
Input
Transformer
Analog In
(XLR-3)
Digital
insert
(fs/16)*16
Digital
trough
Digital Insert/Trough
(AES/EBU)
1.)
Input Gain
Mute
Analog / Digital Gain Offset
2.)
High (Mid, Low, Sub) Gain
High (Mid, Low, Sub) Mute
Digital In
(AES/EBU)
Digital In
(S/PDIF)
Pro C 28 Parameter Setup
fs
=
Gain-Altering Element
=
Sample Rate
7
KLEIN + HUMMEL GmbH
KLEIN + HUMMEL
21.05.02
Digital FIR Controller
Description of Inputs and Outputs
o
Analog Input: Accepts signal levels up to +24 dBu, switchable between electronically and
transformer balanced operation
o
Analog Output: electronically balanced output stages with max. output levels of +16, +10, +4
dBu (selectable inside), asymmetric operation possible by shorting PIN 3 and PIN1 without
changing the gain
o
Multicore Output: Carries the high, mid and low analogue output channel in a single 7-PIN
XLR terminal
o
Digital input XLR: To connect symmetric AES/EBU sources to the Pro C 28. This input is
transformer-coupled
o
Digital input BNC: To connect asymmetric AES/EBU Sources (1Vpp) and asymmetric S/PDIF
(Consumer) sources to the Pro C 28
o
Digital output/through: As delivered by factory, his AES/EBU transformer-coupled output
carries the converted analogue input signal without any manipulation. Alternatively, this output
can double the digital signal which is applied to either the BNC or XLR digital input. The
desired option is selected internally.
o
25-PIN SUB-D Connector: This connector accesses the following digital ports of the
integrated microcomputer:
o
RS-232 port for connecting the Pro C 28 to a PC to transfer parameter setup files
o
MIDI IN/OUT/THROUGH ports to connect several Pro C 28’s
o
EE-Data for accessing the external memory module
8
KLEIN + HUMMEL GmbH
KLEIN + HUMMEL
21.05.02
Digital FIR Controller
The Integrated PEQ Section
The PEQ provides a 10 band equalization with switchable characteristics and full
parametric variation and can be operated independently for the right and left channel.
The following plots show some of the possible settings:
Fig. 1: Low and high shelving filter; Slope = 6 and 12
dB/Oct.; Gain = +6 dB, Q = 0.7
Fig. 2: HP and LP filter; Slope = 6 and 12 dB/Oct.;
Gain = 0 dB; Butterworth Char.
Fig. 3: PEQ filter (bell); Q = 0.5, 1, 2, 4;
Gain = +10 dB; frequency = 1 kHz
Fig. 4: High shelving filter; Q = 0.4, 0.6, 0.8, 1.0;
Gain = -6 dB; frequency = 1 kHz
9
KLEIN + HUMMEL GmbH
KLEIN + HUMMEL
21.05.02
Digital FIR Controller
Fig. 5: HP filters, frequency = 50, 100, 700, 2000,
6000 Hz; Slope 12 dB/Oct.;
Gain = +10 dB; Butterworth-Char.
Fig. 6: PEQ filters (bell);
Gain = -10, -6, -3, 0, +3, +6, +10 dB;
frequency = 150Hz Q = 2
Possible PEQ Settings and Ranges,
Available in Each Band:
Fig. 6: Low shelving filters;
Gain = -10, -6, -3, 0, +3, +6, +10 dB;
frequency = 300 Hz; Q = 0.7
Parameter
Setting / Range of Setting
Channel
L, R, L+R
Type
HS 12: high shelving 12 dB/Oct
HS 6: high shelving 6 dB/Oct
LS 12: low shelving 12 dB/Oct
LS 6: low shelving 6 dB/Oct
Peak: (bell)
HP 12: high pass 12 dB/Oct
HP 6: high pass 6 dB/Oct
LP 12: low pass 12 dB/Oct
LP 6: low pass 6dB/Oct
Q
0,1...6355
Frequency
10 Hz ... 20 kHz
Gain
-99…12 dB
10
KLEIN + HUMMEL GmbH
KLEIN + HUMMEL
21.05.02
Digital FIR Controller
Performance Plots of the O 300 D Monitor with Pro C 28 Controlling
Overall
Low
Mid
High
Overall transfer function and transfer functions of the three ways
1
2
3
Group delay response of O 300D with the following phase equalizations:
Low, mid and high linear phase (Curve 1)
Low minimum phase, mid and high linear phase (Curve 2)
Low, mid and high minimum phase (Curve 3)
11
KLEIN + HUMMEL GmbH
KLEIN + HUMMEL
21.05.02
Digital FIR Controller
Phase response with linear phase equalization
Overall
Sub
Low
Mid
High
Configuration of Pro C 28 / O 300 D with additional subwoofer K + H Type O 800:
Overall transfer function of the whole system and the transfer functions of each way
12
KLEIN + HUMMEL GmbH
KLEIN + HUMMEL
21.05.02
Digital FIR Controller
Peak / RMS Limiter Function
Fig. 1: A sine burst signal, reproduced by an average power amplifier: Output power decreases from
maximum peak power to the maximum continuous power of the amp. This degradation follows an amplifier
type – dependant time constant and depends on the load condition of the amp’s power supply.
Eingangssignal
1
5
Ausgangssignal
1
Attack-Time
2
Hold-Time
3
Release-Time
4
Fig. 2: Reaction of the Pro C 28-internal peak limiter (curve below) when loaded with a sin burst signal (curve
above): A controlled overshoot will be allowed according to the actual load condition of the power amplifier’s
supply, which is digitally modelled by the Pro C 28. Additionally both hold time and release time are affected
by this internal simulation.
13
KLEIN + HUMMEL GmbH
KLEIN + HUMMEL
21.05.02
Digital FIR Controller
Connecting K + H Monitors and Subwoofers
Shown example:
K + H Monitor Type O 300 D und K + H Subwoofer Type O 800.
Note that the O 300 D’s internal analogue controller is deactivated in this
mode!
Active Studio Monitor with internal
Controller bypassed
i.e. K + H O 300 D
High
Freq.
Driver
HP
EQ
BP
LP
Analogue
Controller
(not in use)
Analogue
Input
Mid
Freq.
Driver
Active Studio Subwoofer
K+H O 800
Level Pot = 0 dB
Phase Pot = 0 deg
internal
Low
Freq.
Driver
external
Center Mode:
normal
Bypass:
normal
Power Amp
Direct Input
Right Input
Multicore Cable
with 2 * 7 Pin XLR Connector:
Center Input
(7)
(1)
(6)
Neutrik
NC 7 MX-B
Left Input
analog Right Ch
Signal Input
Neutrik
NC 7 FX-B
(1)
(6)
(7)
to Left Studio
Monitor
ANALOG INPUT
ANALOG OUTPUT
transformer
balanced
electronically
balanced
RIGHT MULTICORE LEFT
GROUND
LIFT
Right
Right
MAINS
AC 230 V ~ 50 - 60 Hz
AC 117 V ~ 50 - 60 Hz
PIN 1
PIN 2
PIN 3
KLEIN+HUMMEL
P RO C 28
24 BIT, STEREO 4 WAY FIR CONTROLLER
2 TIMES 14 BAND PARAMTETRIC EQ
KLEIN+HUMMEL GmbH D-73760 Ostfildern MADE IN GERMANY
CAUTION!
HIGH
+
-
electr.
bal.
Left
PIN
1 Low
2 Low
3 Mid
4 Mid
5 High
6 High
7 GND
MID
LOW
SUB
OUTPUT / THROUGH
INPUT
transformer
balanced
DIGITAL
IN / OUT
INPUT
Left
To prevent the risk of fire and shock hazard don´t
expose this appliance to moisture and rain.
Do not open.
Refer to qualified service personnel for service.
RS 232 / MIDI
SETUP MEMORY MODULE
RESET
Max. power consumption 50 VA
DIGITAL INSERT
Digitalcontroller
K+H Pro C 28
analog Left Ch
Signal Input
digital L/R Ch
Signal Input
14
KLEIN + HUMMEL GmbH
KLEIN + HUMMEL
21.05.02
Digital FIR Controller
5.1 Surround System Setup
Shown Example:
5 x K + H Monitor O 300 D and 2 x K + H Subwoofer O 800
Front R
Front C
Front L
O 300
Rear panel may
become too hot
to touch.
XLR-INPUT
PIN 1
PIN 2
PIN 3
ANALOG: + 6 dBu bal.
DIGITAL: AES 3 110 Ohms
INPUT
SELECTOR
DIGITAL
INPUT/
THROUGH
A
1 Vpp
75 ohms
R L
M
ATT.
-24 dB 0
HOT
internal
-3 -6-9
0
BASS
-2 -4-6
MID
1
0 -1
HIGH RESOLUTION NEARFIELD
REFERENCE MONITOR
3 AMPLIFIER POWERED SYSTEM
MAGNETICALLY SHIELDED
KLEIN+HUMMEL GmbH D-73760 Ostfildern
MADE IN GERMANY
KLEIN+HUMMEL GmbH D-73760 Ostfildern
MADE IN GERMANY
CAUTION!
CAUTION!
CAUTION!
To prevent the risk of fire and shock
hazard don´t expose this appliance to
moisture and rain.
Do not remove rear panel.
Refer to qualified service personnel for
service.
To prevent the risk of fire and shock
hazard don´t expose this appliance to
moisture and rain.
Do not remove rear panel.
Refer to qualified service personnel for
service.
To prevent the risk of fire and shock
hazard don´t expose this appliance to
moisture and rain.
Do not remove rear panel.
Refer to qualified service personnel for
service.
AC 50 - 60 Hz
Max. power consumption 200 VA
AC 50 - 60 Hz
Max. power consumption 200 VA
POWER
POWER
AC 50 - 60 Hz
Max. power consumption 200 VA
POWER
MAINS
ANALOG: + 6 dBu bal.
DIGITAL: AES 3 110 Ohms
FUSE
POWER-AMP
DIRECT INPUT
!
INPUT
SELECTOR
DIGITAL
INPUT/
THROUGH
CAUTION!
-2
A
Replace fuse only with
R L
M
A = ANALOG
R = DIG. RIGHT
L = DIG. LEFT
M = DIG. MONO
1 Vpp
75 ohms
GROUND- same type and rating
LIFT
AC 230 V~ Fuse T 1.6 A
HIGH
Rear panel may
become too hot
to touch.
XLR-INPUT
PIN 1
PIN 2
PIN 3
external
CONTROLLER
SELECT
WARNING!
This equipment is capable of delivering sound
pressure levels in excess of 90 dB, which may
cause permanent hearing damage.
0
O 300
HIGH RESOLUTION NEARFIELD
REFERENCE MONITOR
3 AMPLIFIER POWERED SYSTEM
MAGNETICALLY SHIELDED
KLEIN+HUMMEL GmbH D-73760 Ostfildern
MADE IN GERMANY
Leave enough
space for proper
ventilation
EQUALIZATION [dB]
A = ANALOG
R = DIG. RIGHT
L = DIG. LEFT
M = DIG. MONO
O 300
HIGH RESOLUTION NEARFIELD
REFERENCE MONITOR
3 AMPLIFIER POWERED SYSTEM
MAGNETICALLY SHIELDED
AC 117 V~ Fuse SB 3.15 A
ATT.
-24 dB 0
HOT
Leave enough
space for proper
ventilation
internal
WARNING!
This equipment is capable of delivering sound
pressure levels in excess of 90 dB, which may
cause permanent hearing damage.
0
- 3 -6
-9
0
-2 -4
-6
1
0 -1
MID
CONTROLLER
SELECT
ANALOG: + 6 dBu bal.
DIGITAL: AES 3 110 Ohms
FUSE
POWER-AMP
DIRECT INPUT
!
INPUT
SELECTOR
DIGITAL
INPUT/
THROUGH
CAUTION!
A
Replace fuse only with
AC 230 V~ Fuse T 1.6 A
HIGH
Rear panel may
become too hot
to touch.
XLR-INPUT
PIN 1
PIN 2
PIN 3
external
-2
EQUALIZATION [dB]
BASS
MAINS
1 Vpp
75 ohms
GROUND- same type and rating
LIFT
AC 117 V~ Fuse SB 3.15 A
R L
M
ATT.
-24 dB 0
internal
-3 -6-9
0
BASS
-2 -4
-6
MID
1
0 -1
external
CONTROLLER
SELECT
WARNING!
This equipment is capable of delivering sound
pressure levels in excess of 90 dB, which may
cause permanent hearing damage.
0
FUSE
POWER-AMP
DIRECT INPUT
!
CAUTION!
-2
Replace fuse only with
EQUALIZATION [dB]
A = ANALOG
R = DIG. RIGHT
L = DIG. LEFT
M = DIG. MONO
MAINS
Leave enough
space for proper
ventilation
HOT
GROUND- same type and rating
LIFT
AC 230 V~ Fuse T 1.6 A
HIGH
AC 117 V~ Fuse SB 3.15 A
Center Ch. Input
ANALOG INPUT
ANALOG OUTPUT
transformer
balanced
electronically
balanced
RIGHT MULTICORE LEFT
GROUND
LIFT
Right
Right
MAINS
AC 230 V ~ 50 - 60 Hz
KLEIN+HUMMEL
P RO C 28
Front L/C/R Sub
24 BIT, STEREO 4 WAY FIR CONTROLLER
2 TIMES 14 BAND PARAMTETRIC EQ
KLEIN+HUMMEL GmbH D-73760 Ostfildern MADE IN GERMANY
CAUTION!
PIN 1
PIN 2
PIN 3
AC 117 V ~ 50 - 60 Hz
PIN
1 Low
2 Low
3 Mid
4 Mid
5 High
6 High
7 GND
HIGH
+
-
MID
LOW
SUB
OUTPUT / THROUGH
INPUT
transformer
balanced
electr.
bal.
DIGITAL
IN / OUT
INPUT
Left
Left
To prevent the risk of fire and shock hazard don´t
expose this appliance to moisture and rain.
Do not open.
Refer to qualified service personnel for service.
RS 232 / MIDI
SETUP MEMORY MODULE
Center Mode:
RECOMMENDED SUBWOOFER LEVEL
-9 dB= O 200 @ 6 dBu / O 100 / O 300D
-6 dB = O 400 @ 6 dBu
-3 dB= O 200 @ 0 dBu
0 dB = O 400 @ 0 dBu
-6 dB
Subwoofer Level
= 0 dB
-3 dB
SUBWOOFER-9 dB
LEVEL
RESET
0 dB
-12 dB
-15 dB
Max. power consumption 50 VA
PHASE
Bypass:
DIGITAL INSERT
180°
0°
60
50
40
30
LOW-CUT
CENTER
MODE
1
Phase = 0 deg
Hz
SUB DIRECT
NORMAL
GROUND CONNECTED
LIFTED
BYPASS SUB BYPASS
NORMAL
Low-Cut = 30 Hz
BYPASS
REMOTE
LFE Ch. Input
INPUTS
LEFT
PIN 1 =
PIN 2 =
PIN 3 =
CENTER/
SUB DIRECT
RIGHT
OUTPUTS
Right Ch. Input
LEFT
AC 50 - 60 Hz
PIN 1 =
PIN 2 =
PIN 3 =
Max. power consumption 200 VA
MAINS
POWER
KLEIN+HUMMEL
CENTER/
THROUGH
Rear panel may
become too hot
to touch
CAUTION!
RIGHT
AC 230 V~
T 1,6 A
AC 117 V~
SB 3.15 A
INPUT SECTION
electr.
balanced
ANALOG INPUT
ANALOG OUTPUT
transformer
balanced
electronically
balanced
RIGHT MULTICORE LEFT
GROUND
LIFT
Right
Right
MAINS
AC 230 V ~ 50 - 60 Hz
KLEIN+HUMMEL
Leave enough
space for proper
ventilation
To prevent the risk of fire and shock
hazard don´t expose this appliance to
moisture and rain.
Do not remove rear panel.
No user-serviceable parts inside.
Refer to qualified service
personnel for service.
O 800
ACTIVE STUDIO SUBWOOFER
MAGNETICALLY SHIELDED
KLEIN+HUMMEL GmbH 73760 Ostfildern
MADE IN GERMANY
WARNING!
This equipment
is capable of delivering sound pressure
levels in excess of 90 dB/SPL, which
may cause permanent hearing damage.
P RO C 28
24 BIT, STEREO 4 WAY FIR CONTROLLER
2 TIMES 14 BAND PARAMTETRIC EQ
KLEIN+HUMMEL GmbH D-73760 Ostfildern MADE IN GERMANY
CAUTION!
PIN 1
PIN 2
PIN 3
AC 117 V ~ 50 - 60 Hz
PIN
1 Low
2 Low
3 Mid
4 Mid
5 High
6 High
7 GND
transformer
balanced
+
-
HOT
CAUTION!
Replace fuse only with same type and rating
HIGH
+
MID
LOW
SUB
OUTPUT / THROUGH
-
electr.
bal.
INPUT
transformer
balanced
To prevent the risk of fire and shock hazard don´t
expose this appliance to moisture and rain.
Do not open.
Refer to qualified service personnel for service.
DIGITAL
IN / OUT
Left
Center Mode:
RECOMMENDED SUBWOOFER LEVEL
-9 dB= O 200 @ 6 dBu / O 100 / O 300D
-6 dB = O 400 @ 6 dBu
-3 dB= O 200 @ 0 dBu
0 dB = O 400 @ 0 dBu
RS 232 / MIDI
SETUP MEMORY MODULE
INPUT
Left
-6 dB
RESET
Subwoofer Level
= 0 dB
-3 dB
SUBWOOFER-9 dB
LEVEL
0 dB
-12 dB
-15 dB
Max. power consumption 50 VA
DIGITAL INSERT
PHASE
Bypass:
180°
0°
LOW-CUT
CENTER
MODE
2
60
50
40
30
SUB DIRECT
GROUND CONNECTED
BYPASS SUB BYPASS
Phase = 0 deg
Hz
NORMAL
LIFTED
NORMAL
Low-Cut = 30 Hz
BYPASS
REMOTE
Left Ch. Input
INPUTS
LEFT
PIN 1 =
PIN 2 =
PIN 3 =
CENTER/
SUB DIRECT
RIGHT
Rear Right Ch. Input
OUTPUTS
LEFT
AC 50 - 60 Hz
PIN 1 =
PIN 2 =
PIN 3 =
Max. power consumption 200 VA
MAINS
POWER
KLEIN+HUMMEL
CENTER/
THROUGH
Rear panel may
become too hot
to touch
CAUTION!
RIGHT
AC 230 V~
T 1,6 A
AC 117 V~
SB 3.15 A
INPUT SECTION
ANALOG INPUT
ANALOG OUTPUT
transformer
balanced
electronically
balanced
RIGHT MULTICORE LEFT
GROUND
LIFT
Right
Right
MAINS
AC 117 V ~ 50 - 60 Hz
KLEIN+HUMMEL
P RO C 28
24 BIT, STEREO 4 WAY FIR CONTROLLER
2 TIMES 14 BAND PARAMTETRIC EQ
HIGH
+
-
electr.
bal.
MID
LOW
SUB
OUTPUT / THROUGH
INPUT
transformer
balanced
DIGITAL
IN / OUT
To prevent the risk of fire and shock hazard don´t
expose this appliance to moisture and rain.
Do not open.
Refer to qualified service personnel for service.
RS 232 / MIDI
SETUP MEMORY MODULE
INPUT
Left
Left
RESET
Max. power consumption 50 VA
+
-
transformer
balanced
Leave enough
space for proper
ventilation
To prevent the risk of fire and shock
hazard don´t expose this appliance to
moisture and rain.
Do not remove rear panel.
No user-serviceable parts inside.
Refer to qualified service
personnel for service.
O 800
ACTIVE STUDIO SUBWOOFER
MAGNETICALLY SHIELDED
KLEIN+HUMMEL GmbH 73760 Ostfildern
MADE IN GERMANY
WARNING!
This equipment
is capable of delivering sound pressure
levels in excess of 90 dB/SPL, which
may cause permanent hearing damage.
Rear L/R Sub +
LFE
KLEIN+HUMMEL GmbH D-73760 Ostfildern MADE IN GERMANY
CAUTION!
PIN 1
PIN 2
PIN 3
AC 230 V ~ 50 - 60 Hz
PIN
1 Low
2 Low
3 Mid
4 Mid
5 High
6 High
7 GND
electr.
balanced
HOT
CAUTION!
Replace fuse only with same type and rating
DIGITAL INSERT
3
Rear Left Ch. Input
O 300
HIGH RESOLUTION NEARFIELD
REFERENCE MONITOR
3 AMPLIFIER POWERED SYSTEM
MAGNETICALLY SHIELDED
KLEIN+HUMMEL GmbH D-73760 Ostfildern
MADE IN GERMANY
CAUTION!
To prevent the risk of fire and shock
hazard don´t expose this appliance to
moisture and rain.
Do not remove rear panel.
Refer to qualified service personnel for
service.
AC 50 - 60 Hz
Max. power consumption 200 VA
POWER
Rear panel may
become too hot
to touch.
XLR-INPUT
PIN 1
PIN 2
PIN 3
ANALOG: + 6 dBu bal.
DIGITAL: AES 3 110 Ohms
DIGITAL
INPUT/
THROUGH
INPUT
SELECTOR
A
1 Vpp
75 ohms
R L
M
A = ANALOG
R = DIG. RIGHT
L = DIG. LEFT
M = DIG. MONO
Rear L
ATT.
-24 dB 0
HOT
Leave enough
space for proper
ventilation
internal
WARNING!
This equipment is capable of delivering sound
pressure levels in excess of 90 dB, which may
cause permanent hearing damage.
0
-3 -6-9
0
-2 -4-6
1
0 -1
BASS
MID
HIGH
HIGH RESOLUTION NEARFIELD
REFERENCE MONITOR
3 AMPLIFIER POWERED SYSTEM
MAGNETICALLY SHIELDED
external
KLEIN+HUMMEL GmbH D-73760 Ostfildern
MADE IN GERMANY
CAUTION!
Controller
Select
To prevent the risk of fire and shock
hazard don´t expose this appliance to
moisture and rain.
Do not remove rear panel.
Refer to qualified service personnel for
service.
AC 50 - 60 Hz
Max. power consumption 200 VA
POWER
external
ANALOG: + 6 dBu bal.
DIGITAL: AES 3 110 Ohms
FUSE
POWER-AMP
DIRECT INPUT
!
DIGITAL
INPUT/
THROUGH
INPUT
SELECTOR
CAUTION!
A
Replace fuse only with
AC 230 V~ Fuse T 1.6 A
AC 117 V~ Fuse SB 3.15 A
Rear panel may
become too hot
to touch.
XLR-INPUT
PIN 1
PIN 2
PIN 3
CONTROLLER
SELECT
-2
EQUALIZATION [dB]
MAINS
O 300
internal
GROUND- same type and rating
LIFT
1 Vpp
75 ohms
R L
M
A = ANALOG
R = DIG. RIGHT
L = DIG. LEFT
M = DIG. MONO
ATT.
-24 dB 0
HOT
internal
WARNING!
This equipment is capable of delivering sound
pressure levels in excess of 90 dB, which may
cause permanent hearing damage.
0
-3 -6-9
0
-2 -4
-6
1
0 -1
BASS
MID
external
CONTROLLER
SELECT
HIGH
FUSE
POWER-AMP
DIRECT INPUT
!
CAUTION!
-2
EQUALIZATION [dB]
MAINS
Leave enough
space for proper
ventilation
Replace fuse only with
AC 230 V~ Fuse T 1.6 A
GROUND- same type and rating
LIFT
AC 117 V~ Fuse SB 3.15 A
Rear R
15
KLEIN + HUMMEL GmbH
KLEIN + HUMMEL
21.05.02
Digital FIR Controller
Operating Software (Overview)
K+H Pro C 28
Main Menu
0
No. / Name of Menu Step
Selectable Options
Units
Default Setting
0
1
2
3
Load Setup
Save Setup
Input Gain
4
Gain Offset
5
Mute
6
7
8
9
Input Select
Digital Output
Input Routing
Speaker Select (Matrix)
10 Master Delay
11
12
13
14
15
16
17
Delay Offset
Channel Mute
Channel Gain
Channel Phase Invert
Channel Delay
Delay Link
Limiter
No. / Name
Enter Setup Name / Enter Setup No.
Gain [dB]
Balance L [dB] / R [dB]
Analog [+/- dB]
Digital [+/- dB]
Mute on / Mute off
Mute Attenuation [-dB]
Analog / Digital / DigitalInsert
on / off
Normal / Reverse / Mono
Top
Subwoofer
Delay Time [ms]
Distance [m]
Left / Right
High, Mid, Low, Sub: L, R, L+R [yes/no]
High, Mid, Low, Sub: L, R, L+R [dB]
High, Mid, Low, Sub: L, R, L+R [yes/no]
High, Mid, Low, Sub: L, R, L+R [ms]
off / Mid+Hi / Low+Mid+Hi
Lim. Release [dB/s]
Display Test (via Enter)
-----83...0...+45 dB
-16...0...+16 dB
-30...30 dB
-30...30 dB
---40...0 dB
----------0...999 ms
0...339,9 m
0...5759 us
---18...6 dB
--0...92,1 ms
--10...250 dB/s
---
000 Default Setup
--+20
L=R=0
0
-13
off
-20
Analog
on
Normal
----0
0
0/0
no
0.0
no
0.0
Low+Mid+Hi
250
---
No. / Name of Menu Step
X
3
4
5
6
7
8
9
Selectable Options
Brightness
LEDs [%]
Display [%]
Midi Settings
Channel
out [out only / out-trough / loop]
Baudrate [Midi / RS232]
ParaChg [on / off]
TX-Chn
TMP
Midi-Monitor [start]
Security Level / Password
Load Level Nr.
Password
Change Password
(Name)
IR Control
[on / off]
AES Stat./ Sample Rate
S.Rate [kHz]
Version No. (Betriebssystem) Reeboot
Initialize
Service Section
Check LED Bargraph
Version No. (Eprom)
---
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Units
Default Setting
0,50,75,100 %
25,50,100 %
1...16
--31250 / 9600
--1...16, OCM
38...255 BMP
--0...5
-----------------
1
100
100
1
out only
RS-232 (9600)
off
1
100
5
0000
0000
on
--------App. V KH 1.0XX
Hierarchy Level
2
3
X
X
4
5
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
1
X
X
X
X
X
4
5
K+H Pro C 28
EQ Menu
0
No. / Name of Menu Step
1
X
5
X
X
X
0
2
Hierarchy Level
2
3
4
X
X
X
X
K+H Pro C 28
System Menu
0
1
1
X
EQ Set
2
EQ
3
EQ 1
...
...
12 EQ 10
13 Load EQ Setup
14 Save EQ Setup
Selectable Options
Low Cut [Hz]
Bass EQ [dB]
Mid EQ [dB]
High EQ [dB]
Gain [dB]
EQ [on / off]
Channel [L, R, L+R]
Type [HS12, HS6, LS12, LS6, Peak,
HP12, HP6, LP12, LP6]
Güte
Frequenz [Hz]
Gain [dB]
No. / Name
Enter Setup Name / Enter Setup No.
Units
Default Setting
30...80 [10] Hz
-10...0 [2] dB
-5...0 (1) dB
-4...1 (1) dB
-24...0 dB
30
0
0
0
-3
on
LR
Peak
------0,1...6355
---99...12 dB
-----
2
(different)
0.0
000 Default Setup
Default Setup
Hierarchy Level
2
3
X
X
X
X
16
KLEIN + HUMMEL GmbH
KLEIN + HUMMEL
21.05.02
Digital FIR Controller
Organization of Stored Parameter Setups
(All Parameter Setups are stored in the internal flash rom chip, which is capable of max. 70
different parameter setup files)
•
Typical display shot when entering the “Speaker Select” – Menu Step belonging to the
MAIN Menu
TOP
PRO X 6
Organization of all stored parameter setups according to a matrix structure
(Example with 6 x 3 = 18 parameter setup files, max. > 70 files)
------------------- Subwoofer ---------------------------- Top ---------
•
SUBWOOFER
PRO X SUB S
None
Pro X Sub S
RB 480
Pro X 6
1.blk
1.blk
3.blk
RX 60
4.blk
5.blk
6.blk
RX 120
7.blk
8.blk
9.blk
RX 180
10.blk
11.blk
12.blk
RX 240
13.blk
14.blk
15.blk
Neutral
neut1.blk
neut2.blk
neut2.blk
(*.blk = single parameter setup file)
17
KLEIN + HUMMEL GmbH
KLEIN + HUMMEL
21.05.02
Digital FIR Controller
Room-Specific Parameter Setups
General:
Standard parameter setups as delivered by K + H together with a studio monitor like the model O
300 D are optimized by the K + H acoustic laboratory to achieve a flat overall frequency response
of the whole system. This proceeding is the same like with all analogue controlled studio monitors
at K + H.
Additionally at the Pro C 28, the phase response is equalized to a linear or a minimum run which is
only possible with the Pro C 28’s proprietary digital FIR filtering concept.
To adapt a given controller-monitor setup to a listening environment (i.e. studio), the end customer
can use the possibilities of the integrated 10 Band PEQ and / or the room EQ. Because of the
conventional IIR filtering in this section, it is possible to listen / measure the changes in real-time
like with an analogue PEQ.
To maximize system performance, it is highly recommended to create an individual FIR parameter
setup which provides the desired room equalization without affecting the phase response of the
system like the IIR digital filters do and any of course any other analogue EQ does.
There are two different options how to get the necessary room EQ setting to create the roomspecific parameter setup:
Option A (for the very best system performance):
System set up and measuring of the system done by K + H or specially authorized sub
contractors on customer’s location:
1. Set up of the system (consists of Pro C 28 and K + H active powered studio monitor)
2. Measuring the system’s frequency response up to 30 times at different points in the
surrounding area of the main listening position. After that all plots are averaged to get one
representative plot for the behaviour of the system. In this way each speaker has to be
analyzed. It is definitely not sufficient to take only one single measurement, for example at the
audio engineer’s position, to get the desired result!
3. Correction of unlinearities in the averaged plots using the internal PEQ filters
⇒ The resulting equalization curve of the PEQ affects the target function of the new FIR filter
setup
4. Calculation of the new, room-specific FIR filter setup using a proprietary loudspeaker
measuring and filter calculating software
5. Transferring the new parameter setup to the Pro C 28 and resetting the PEQ.
⇒ A room equalization of a stereo setup takes about one day inclusive all music listening tests
18
KLEIN + HUMMEL GmbH
KLEIN + HUMMEL
21.05.02
Digital FIR Controller
Option B (less priced than Option A):
System set up and measuring done by the customer, calculation of the new parameter
setup done by K + H
1. Customer sets up the system
2. Measuring the system’s frequency response along to the customer’s method with adequate
measuring equipment, registering the unlinearities caused by the listening environment
3. Correction of the unlinearities in the averaged plots using the internal PEQ filters
4. Sending the PEQ Parameters via e-Mail to K + H
5. K + H creates the new parameter setup by using the information received
6. The new parameter setup files will be sent to the customer (CD-Rom or via e-mail)
7. Customer transfers the received files into his Pro C 28
8. Bypassing the PEQ section and loading the new room-specific parameter setup
19
KLEIN + HUMMEL GmbH
KLEIN + HUMMEL
21.05.02
Digital FIR Controller
Optional IR Remote Control RC-55
(Label shown)
Deactivating the remote
control
Calling the room EQ
section
Menu keys
Enter key to
validate changed
parameters,
up/down/left/right
keys to select
parameters
Bypassing the whole IIR
EQ secion
Lowering the signal level
Volume up / down keys
+/- Incremental
keys
4 Keys for direct setup
access
20