Chameleon Labs 7602 MKII Owner's Manual

Chameleon Labs

Model 7602 MKII

Microphone Preamplifier and Equalizer

Owner’s Manual

704 228thAvenue NE, # 826

Sammamish, WA 98074

206-264-7602

www.chameleonlabs.com

Revision A June, 2008

1

Your Model 7602 MKII microphone preamplifier has a
transformer balanced input with a range between 20dB
and 80dB of gain. The separate line input is transformer
balanced and accepts input levels from -20 to +10dB.
The equalizer section is a selectable 3 band design with a
flexible filter section.

The Model 7602 MKII has been carefully constructed and
individually tested for quality. It utilizes pure class ‘A’
circuitry. This unit is made with 100% discrete
components, hand wound transformers and was fabricated
to precisely match vintage counterparts manufactured in
the early to mid 70’s.

The Chameleon Labs Model 7602 MKII is based on high
audio performance design techniques. By employing
classic circuit design, polystyrene capacitors, a gold
contact gain selector and custom wound transformers
Chameleon Labs ensures that the Model 7602 MKII will
exhibit classic audio sound.

Your Model 7602 MKII represents a dramatic
breakthrough in delivering vintage audio performance at
an affordable price.

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Features of the Model 7602 MKII:

• Fully balanced transformer mic input and output;

• Balanced XLR outputs;

• Hi-Z direct inputs for instruments on the front panel;

• 48VDC phantom power selector on the front panel;

• 20 position gold contact rotary gain switch for both

Mic and Line sections;

• Output level control functions as a fader when going

straight to tape;

• Oversize power supply provides many times the

current needed for optimum sound quality and will
power two units;

• One-year warranty

3

Front Panel Controls: (Left to Right)

Switch general rule: When the switch is moved toward the function label,

the feature is selected.

Power-

This switch applies power to the unit.

1 is used this switch is inoperative and the power is controlled by the switch on
the CPS-1)

(When the optional CPS-

300/1.2K Ohm-

This switch selects the microphone input impedance to
either 300 or 1,200 Ohms.

48V Switch-
This switch supplies 48VDC (Phantom Power) to the
Microphone Input XLR jack.

DI Switch-

This switch routes the Direct Input jack into the unit.

Microphone / Line sensitivity-

This pot controls input level for the microphone and
line inputs. The microphone and line inputs have their
own input connectors on the rear panel and a separate
input transformer. Each rear input has its own section
of the control on the input gain selector switch. The
microphone section provides 20 to 80dB of boost in

4

5dB steps, and the line section provides +10 to -20dB
of adjustment.

EQ Switch-

This switch turns the equalizer section on.

Ø Switch-

This switch reverses the phase of the unit 180°.

Four position LED array-

The first LED indicates that the unit has power turned
on.
The second LED indicates the presence of signal.
The third LED indicates the presence of a +4 dB
signal.
The fourth LED indicates the presence of a peak
amplitude signal.

Filter-

This is a high pass filter with 3dB loss at 300Hz,
160Hz, 80Hz, and 50Hz with an 18dB cut per octave
slope.

Low Equalization -

This section has a shelving slope with four frequency
selections: 220Hz, 110Hz, 60Hz, and 35Hz. This
equalizer affects the selected frequency and all others
below it.

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