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The Model 7602 MKII from Chameleon Labs is the sequel to the 7602 Microphone Preamplifier / Equalizer. New features in the MKII model include selectable mic impedance, LED input metering, upgraded knob styles, and two different power options—all of this for the same price as the original unit. The signal processor ships with an inline power transformer (all regulation is done inside the unit). The rackmountable CPS-1 can also still be used, but is no longer required.

The 7602 MKII Microphone Preamplifier/Equalizer is based on a classic and revered design utilizing 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.

Equalizer Section (Selectable 3 band design with a flexible filter section):

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. The gain control provides 20db of boost or cut.

Mid Equalization

This section has a peaking characteristic with six frequency selections: 360Hz, 700Hz, 1.6k, 3.2k, 4.8k, and 7.2k. The gain control provides 20db of boost or cut.

High Equalization

This section has a shelving characteristic with five frequency selections: 16k, 12k, 7k, 4.9k and 3.4k. This section adjusts the selected frequency and all others above it. The gain control provides 20db of boost or cut.

Electronics

By employing classic circuit design, polystyrene capacitors, a gold contact ELMA gain selector and custom wound transformers, Chameleon Labs ensures that the Model 7602 MKII will exhibit classic audio sound.

The Model 7602 MKII has a transformer balanced input with a range between 20dB and 80 dB of gain. The separate line input is transformer balanced and accepts input levels from -20 to +10dB.

Power Options


The Model 7602 MKII features two different power options:
24VAC Adapter: Each Model 7602 MKII ships with a mid-line power supply, type-dependent on country of operation. This is not a traditional "wall-wart" but simply an outboard AC transformer. DC filtering and regulation is accomplished inside the 7602 MKII itself.

CPS-1 Dual Power Supply (sold separately): For users who prefer a rack-mounted power option, the 7602 MKII preamp / EQ may instead be powered by the CPS-1 Dual Power Supply. The CPS-1 is offered as an optional accessory and can provide power to two 7602 MKII units. Users will need to contact their preferred dealer to acquire the DC Cable needed to connect the CPS-1 and 7602 MKII.

What Makes Chameleon Labs Different?
Chameleon Labs is a new type of company, focused on delivering performance and value at a price previously thought impossible. How do they do it? By reinventing how global manufacturing is approached. Chameleon Labs engineers are not inexperienced kids in a garage, buying products that are designed and built in China. Chameleon Labs is comprised of audio professionals with many decades of experience in high-end pro audio gear. From its inception seven years ago, they pioneered the idea of "blended technology", using top-notch parts from the US, UK, and Europe combined with low-cost metalwork and assembly from China. This combination enables a superior performance level at a low price point.

Every Chameleon Labs product is first created and engineered here in the U.S. The goal is to achieve a specific sound through tedious testing in major U.S. recording studios and listening to numerous tracks and/or mixes with a very specific sonic target in mind. A new design must impress the best and brightest of our evaluation group before it ever reaches the factory floor.

Chameleon Labs 7602 MKII Microphone Preamplifier/Equalizer Features:

Fully balanced transformer mic and line inputs
Balanced XLR output
Hi-Z direct input for instruments on the front panel
LED input metering
Selectable mic impedance switch (300 or 1200 Ohms)
48VDC phantom power switch
180 degree phase reversal switch
20 position gold contact ELMA 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

Chameleon Labs 7602 MKII Microphone Preamplifier/Equalizer Specifications:

Input impedance:
Microphone — 300 & 1,200 ohms
Line — 10,000 ohms
D.I. — 100,000 ohms

Sensitivity:
Microphone — -80dBm to -20 dBm in 5dB steps for 0 dBm output.

Line — -20 dBm to +10 dBm in 5 dB steps for 0 dBm output.

Noise: Measured at 80 db of gain with 200 ohm input termination, without 20Hz to 20kHz to assist in filtering out noise.

-49dbu with final output stage at 50% EIN -129 dbu;
-46dbu with final output stage at unity EIN -126 dbu;
-56dbu without final output stage EIN -136 dbu
Controls either "flat" or switched out.

Output: Balanced and floating to feed a 600 ohm load. Maximum output +26 dBm into 600 ohms, or +20dBm into 150 ohms.
Output impedance: 600 ohms, balanced (source impedance 75 ohms).
Frequency Response: 11 Hz — 77.65 kHz — 3 dB. Level variation is less than 0.2%.
Distortion: 1k Hz = 0.0245%