The Model 7602 MKII is the sequel to our smash hit 7602 Microphone Preamplifier/Equalizer. The 7602 MKII new features 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 7602 MKII 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 Model 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. The Model 7602 MKII represents a dramatic breakthrough in delivering vintage audio performance at an affordable price.

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.

Model 7602 MKII Features

• Fully balanced transformer mic and line inputs
• Balanced XLR output
• Hi-Z direct input for instruments on the front panel
• LED input metering *NEW
• Selectable mic impedance switch (300 or 1200 Ohms) *NEW
• 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
• Carnhill® mic and output transformer option ($249 MSRP) *NEW
• One-year warranty

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.

X-MOD ($249 MSRP)

We offer factory installed Carnhill® Mic and Output Transformers for this unit.

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: The Model 7602 MKII may also be powered by the rack-mountable CPS-1 Dual Power Supply. The CPS-1 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.

Model 7602 MKII 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%