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ProductsMixe IRP
Professional Sound Products
®
IRP Professional Sound Products
1111 Tower Lane Bensenville, IL 60106 U.S.A.
PHONE: 800-255-6993 630-860-1993
FAX: 630-860-1997
Voice-Matic
®
Mixers
DE-4080/DE-4040
INSTALLATION MANUAL Patented Voice-Matic
®
automatic mixing Three-band TEQ
®
on all Mic/Line inputs LEVEL-MATIC ®
AGC on Main output Smooth NOM attenuation control LAST MIC HOLD MixLink ILS
®
linkable chassis for input expan-
sion Remote chassis linking for Room Combining Transformer isolated Main output Two independently adjustable Aux outputs Two electronically balanced auxiliary inputs Assignable mixing of Aux inputs to outputs for
Mix-Minus connections Removable screw-clamp connectors Rugged all steel chassis for maximum RFI and
EMI protection Five year limited warranty Transformer balanced Mic/Line inputs each
with:
Automatic/Standard channel selection
Phantom power ON/OFF switching
Switched 20dB input pad
Switched 100 Hz High-Pass filter
Pre/Post gate selection to Aux outputs
Post-gate buffered preamp output
Pre-level control buffered preamp output
Channel Status logic output Remote level adjustments of all inputs and
Main Output with 60dB control range Remote switching of all inputs and Main
output Remote Automatic/Standard mode selection Power-transient noise suppression circuitry
FEATURES 2
FRONT PANEL DESCRIPTION
1. INPUT CHANNEL SENSITIVITY CONTROL: This control is used to adjust the amount of
amplification (gain) between the input and output stage of the channel.
2. TEQ: These are tone controls used to adjust the low (L), mid (M), and high (H) frequency
response for the respective channel. Both the low and high frequency controls use a
shelving characteristic filter which starts at 320 Hz and 2000 Hz respectively. The center
control is Boost/Cut centered at 800 Hz. Each control has 20dB of range.
3. STATUS LED:
This indicates when a channel has been activated.
4. AUX 1 & 2 IN CONTROLS: These controls are used to adjust the amount of amplification
(gain) between the input and output stage of the respective auxiliary input.
5. MAIN OUTPUT CONTROL: This is used to adjust the output level of the MAIN output.
6. POWER: Depressing this switch energizes the DE-4080/4040 and is indicated as such by
an adjacent LED. The LED will illuminate approximately 2 seconds after switch activation
and gives power on indication.
7. LEVEL-MATIC: These LEDs indicate the amount of gain reduction the AGC (Automatic
Gain Control) is applying to the main output to achieve a uniform output level. 3
REAR PANEL DESCRIPTION
1. AUX 1 IN/MAIN OUT: This switch is used to assign the AUX 1 input to the MAIN output.
2. AUX 2 IN/MAIN OUT: This switch is used to assign the AUX 2 input to the MAIN output.
3. AUX 1 IN/AUX OUT: This switch is used to assign the AUX 1 input to the AUX outputs.
4. AUX 2 IN/AUX OUT: This switch is used to assign the AUX 2 input to the AUX outputs.
5. LAST MIC HOLD: This switch is used to enable (ON) or disable (OFF) the LAST MIC
HOLD feature. The LAST MIC HOLD circuitry keeps the most recently activated microphone
channel held to the on state until another input channel receives a signal. This feature
can be used to enhance microphone continuity during breaths and between musical phrases
when reinforcing a soloist, while the mixer is in AUTO mode. LAST MIC HOLD can also be
engaged to keep the continuity of room ambience in the sound system, recording signal or
broadcast signal.
6. AUX 1 & 2 INPUTS: These are electronically balanced inputs which can be used to
interface signals from a cassette deck, CD player, other mixers or any other line level signal
which may need to be interfaced to the DE-4080/4040. Each AUX input can be assigned
to either the Main output, AUX outputs or both. This signal routing versatility allows a Mix-
Minus configuration to be created with the DE-4080/4040.
Mix-Minus signifies that the input signal to a device is a mix of all signals without (Minus)
the output signal from the device. The Mix-Minus configuration eliminates electrical
feedback paths when simultaneously connected inputs and outputs of an external device
are interfaced to the DE-4080/4040. 4
7. LINK IN: These connectors are used for the linking of additional DE-4080/4040s to
provide more automatically mixed inputs. The LINK IN and LINK OUT on the same unit
SHOULD NEVER BE CONNECTED TOGETHER.
8. LINK OUT: These connectors are used for the linking of additional DE-4080/4040s to
provide more automatically mixed inputs. The LINK IN and LINK OUT on the same unit
SHOULD NEVER BE CONNECTED TOGETHER.
9. MAIN OUTPUT: This is a balanced, transformer isolated output which is a mix of the
gated microphone signals with NOM (Number of Open Microphones) count attenuation and
LEVEL-MATIC AGC, ungated signals from input channels switched to standard mode (STD)
plus the AUX input signals assigned to this output. The MAIN output is muted during power
interruptions to the mixer.
10. AUX 1 & 2 OUTPUTS: These are electronically balanced outputs which are a mix of the
pre/post gate selection from all microphone channels plus the auxiliary inputs assigned to
these outputs. The AUX outputs are not affected by NOM attenuation and LEVEL-MATIC
circuitry. Both AUX outputs have identical signals, but each output has an independent
level control. The AUX 1 output is muted during power interruptions to the mixer. AUX 2
output is NOT muted.
11. AUX OUT LEVEL 1& 2: These two controls are used to independently adjust the level of
the AUX 1 & 2 outputs. 5
12. STATUS OUT: Microphone status outputs are available at this point via a DB-9 connec-
tor (See Figure 1 for pin configuration). The STATUS OUT provides an open collector output
for each microphone channel. The STATUS OUT is low (transistor conducting) when the
corresponding microphone is ON. Loads connected to the STATUS OUT must have an
externally supplied power source or an external pull-up resistor for input termination when
connecting to a logic circuit. Refer to the STATUS OUT APPLICATIONS section for more
details on the use of the STATUS OUT.
Pin
Function
1
Input 1 Status
2
Input 2 Status
3
Input 3 Status
4
Input 4 Status
5
Input 5 Status
6
Input 6 Status
7
Input 7 Status
8
Input 8 Status
9
Ground
Figure 1 6
13. POWER: This five pin din connector is used to connect the PS-1 external, low voltage
AC power supply to the DE-4080/4040.
14. MODE: This switch is used to select whether the mixer will operate in standard mode
(STD) or in automatic mode (AUTO). (STD) mode can be used if manual, attended operation
of the mixer is desired. In (STD) mode all microphones are open. Channels individually set
to (AUTO) mode will continue to be affected by the LEVEL-MATIC (if LEVEL-MATIC is acti-
vated on the mixer) and channels set to (STD) mode will bypass the LEVEL-MATIC.
15. LINK: This switch enables (ON) or disables (OFF) the link between mixers. LINK mode
combines all the features of the automatic mixers, including Dynamic Threshold Sensing
(DTS), NOM count attenuation, LEVEL-MATIC AGC, LAST MIC HOLD and Automatic/Stan-
dard mode selection among all linked chassis. Identical signals are transmitted to the MAIN
and AUX outputs of all linked mixers. Easy configuration of room-combining can be accom-
plished via remote activation of LINK mode among the DE-4080/4040 mixers. In order to
successfully link two units, a link connector must be inserted in the (LINK OUT) jack of one
unit and into the (LINK IN) jack of the other unit. Also, either the (LINK) switch on the lower
unit must be in the (ON) position or pin 14 on the REMOTE CONTROL connector, of the
lower unit, must be connected to ground (pin 15) to enable the link function.
16. LEVEL-MATIC AGC: This switch enables (ON) or disables (OFF) the LEVEL-MATIC AGC
circuitry. When activated, the LEVEL-MATIC AGC circuitry will automatically adjust sound
system gain to maintain a uniform output level by sensing changes in average input signal.
This compensates for sound level variations between loud and soft talkers or from varying
talker to microphone distance.
17. VCA REF VOLTAGE: This switch is used to select either +10 or +12 VDC as the VCA
reference voltage. This reference voltage is available from the REMOTE CONTROL connec-
tor. Using the +12 VDC setting allows externally connected remote potentiometers to add
10 dB of gain to the system beyond the setting of the INPUT SENSITIVITY CONTROL.
When the switch is set to +10 VDC, the maximum amount of gain the remote control can
contribute to the system is governed by the setting of the INPUT SENSITIVITY CONTROL.
18. VCA MUTE (dB):
This switch is used to select the range, either -24 or -48 dB, which the
remote control operates in before activating the 100 dB mute on the respective channel.
19. CHASSIS GROUND: This terminal is used as means to earth ground the DE-4080/4040
chassis. For the best possible RF interference immunity, this connection must be connected
to a high in