Phoenix Audio DRS-Q4M Mk2 User Manual

PHOENIX AUDIO

Costa Mesa
CA 92626
USA

Telephone [phone]
Email : [e-mail]

Owner’s Manual

Firstly, let us congratulate you on your purchase of the DRSQ-4M mk2, Microphone Pre­Amplifier/DI/Eq. The DRSQ-4M mk2 is a 4 Band Gyratory-based Eq with 11 selectable
frequencies, and Mic, Line, and DI inputs. We know you will be as pleased with it’s sonic
qualities as we are.

You are now the proud owner of a Mic-pre/DI/Eq that has the advantages of more than 25
years experience in audio engineering, today’s component and manufacturing technology, but
still retaining “that sound” uniquely achievable through Class A design.

As you can tell, Phoenix Audio is dedicated to the development of Class A discrete
technology used within high build-quality equipment.

The DRS-Q4M mk2 uses our well proven and loved Class A output stage (DSOP-2),
but also has our latest breakthrough in transformer-less Class A, Discrete, truly­balanced Mic Input Technology which gives a "valve-like" sound. It also incorporates
our high input impedance DI circuitry.

You CAN hear the difference!!!

DRS-Q4M mk2 Specifications

1U half rack space unit: With 240V/110V mains voltage input selector switch

Class A (DSOP-2) Output specs. Frequency response: 20Hz to 20kHz +- 0.5dB,

Maximum Output Level: +26dBu @ 1kHz

Noise: -90dB @ 20Hz to 20kHz.

Output connections: XLR and TSR 1/4" Jack on rear

Phoenix Audio’s unique Class A, transformer-less, True balanced Mic input stage.

Microphone/Line input: XLR on Rear Panel

DI inputs: _” TSR Jack on Front Panel

Individual Earth Lift: Push-button Switches

Gain Range (Mic input): -30 to -70 in 5dB steps With 10dB more available on the fader.

Gain reduction: -30dB pad push-button Mic/Line switch (Mic input)

High Input Impedance DI: Mono 1/4" Jack on front panel (no FETs)

Gain Meter: LED Metering. (Green = 0dB, Yellow = +8dB, corresponding to “4” and “6”

on a PPM Meter).

Phantom Power: Switchable phantom on Push-button Switch

High Pass Filter: Roll-off starts at 120Hz @ 12dB per Octave.

Phase Reverse: on Push-button Switch

Frequency Response Mic Input Stage: -0.4dB @ 40Hz, -0.3dB @ 25kHz

Frequency Response: DI Input Stage: -0.3dB @ 40Hz, - 0.5dB @ 25kHz

Typical Headroom: +24dB on Mic-Pre stage

Gyratory-based EQ Frequency Centres: (4 Bands) High - 15K, 10K, Hi Mid - 6K, 3K,
1K6, Low Mid – 800Hz, 400Hz, 200Hz, Low - 130Hz, 80Hz, 40Hz

EQ Cut/Boost Levels: 16dB Cut/Boost Per Band, stepped to 21 positions

DI Stage gain: Maximum of 20dB

CONNECTIONS AND CONTROLS

Front Panel

Rotary Gain Sensitivity Switch: The sensitivity switch operates in both Mic and Line Mode. For Microphone

mode the switch’s gain range is marked from -30dB to -70dB. When the LINE switch is pressed in the
sensitivity of the gain control is -30dB lower than the marked gain. Eg: -30 position in LINE mode is 0dB, ­60dB position in LINE mode is -30dB.

Output Level Rotary knob: The Output level knob controls the level at the output XLR on the rear panel
only. It does not affect the input sensitivity.

Level LED’s: The LED’s are marked 0 (Green) and +8 (Red). These are set to illuminate at 0dB and +8dB
(Corresponding to 4 and 6 on a PPM Meter). The LED’s are PPM style metering and have some hysteresis to
allow a better view of fast changing levels.

These LED’s are connected to the OUTPUT stage of the unit to give you a clear view of what level is being
sent to external equipment.

DI Input _” Jack socket: The Jack socket is a TS socket wired Tip-Hot, Sleeve-Cold. The DI input is a high
input impedance circuit (without the use of FETs), and is capable of accepting a wide range of instruments, from
keyboards to guitars and more.

EQL Push Button: Engages the Gyratory Based Eq circuit when depressed.

DI Push Button: Disconnects the Input XLR and engages the DI Jack on the front panel.

HPF Push Button: Engages the High Pass Filter. The filter is active regardless of which input is being used.

Phase Push Button: Reverses the Phase of the Input XLR only.

+48V Push Button: Applies 48V Phantom Power to the Input XLR. The phantom power will be applied to

the XLR in both Mic and Line mode.

Mic/Line Push Button: Switches the Input XLR between Mic and Line (depressed) mode.

Earth Lift Push Button: Disconnects internal 0v from the chassis earth. This is for use when using

microphones with their own PSU, or can be useful in situations where hum is being created by an earth loop.
This push-button does not disconnect the chassis safety earth from the mains earth.

REAR PANEL

Mic Input XLR: This XLR accepts both Microphone and Line level inputs. These can be balanced or

unbalanced inputs.

Output XLR: Transformer balanced output. Can be used at the same time as the Output _” TRS Jack, as
long as total loading does not exceed 200R.

INPUT and OUTPUT connections:

The DRS is fitted with an XLR input on the rear panel. The XLR's are industry-standard Pin 1 - Ground, Pin 2

- Hot, Pin 3 - Cold.

The DI input is a standard 1/4" (6.35mm) mono jack socket (wired Standard - Tip-hot, Sleeve-Ground)

The Output of the unit is on the rear of the unit and is available on both a 3 Pin XLR (wired as the input XLR),
and a Stereo 1/4" (6.35mm) Jack socket (wired Tip-Hot, Ring-Cold, Sleeve-Ground). The outputs are wired in
parallel.