Chameleon Labs 7603 Microphone Preamplifier and EQ

- On Switch: Turn Pre Amp On - VU Meter Light
- 300Ohm / 1200Ohm Switch: Switch between 300Ohm and 1200Ohm input impedance for the mic input
- 48V Power Supply Switch: On/Off
- DI Switch: Direct Input with 100KOhm input sensitivity
- EQ Switch: Engages audio high pass filter and equalization circuits
- Polarity Switch: Reverses the polarity of the audio signal
- Mic/Line Sensitivity Switch: +20dB to +70dB of mic boost and -30dB to +20dB of line level adjustment.
- High Pass Filter: Provides a 15dB/octave high pass filter at 40Hz, 80Hz, 160Hz and 320Hz
- Low Frequency Equalization: Provides +/-15dB of Boost or Cut at 35Hz, 60Hz, 110Hz or 220Hz
- Mid Frequency Equalization: Provides +/-15dB of Boost or Cut at 360Hz, 700Hz, 1.6kHz, 3.2kHz, 4.8kHz or 7.2kHz
- High Frequency Equalization: Provides +/-15dB of Boost or Cut at 3.4kHz, 4.9kHz, 7kHz, 12kHz or 16kHz

- Inputs:
- Microphone (XLR): Transformer balanced input, RF isolated
- Line (XLR): Transformer balanced input, RF isolated
- Direct In (1/4" TRS): High impedance instrument input

- Input Impedance:
- Microphone: 300Ohm or 1200Ohm
- Line: 10kOhm line bridging from 600Ohm or lower source impedance
- Direct Input: 100kOhm

- Sensitivity:
- Microphone: From -70dBm to -20dBm in 5 dB steps for 0dBm output
- Line: From -30 dBm to +20 dBm in 5 dB steps for 0 dBm output
- Noise Specification: Better than -125dBm EIN between -80 and -40 dBm referenced to 600Ohm input impedance, SNR 116dB at maximum output
- Output Type: Transformer balanced and floating to drive 600 Ohm load
- Maximum Output: +28dBu into 600Ohm load impedance
- Frequency Response: 10Hz - 20kHz -0.5dB 10Hz - 50kHz -1dB

- Indicators:
- VU Meter Light: Power ON
- Red Input Gain: Input Overload
- Red Output Gain: Output Overload

- Power Supply:
- 100V - 240V (50/60Hz): Switch mode power supply, fully shielded 3 amp peak output capability, quiescent consumption 0.5 Watts

- Mechanical:
- 1RU Steel enclosure
- Aluminum front panel
- Laser etched graphics
- Milled aluminun knobs
Dimensions and Weight in Packaging
Base Item
Shipping Weight: 15.5 lbs
Shipping Dimensions: 22 x 17 x 6 in
Manufacturer Part Number (MPN): 7603
(1 ratings)
Submitted December 10, 2020 by a customer from
"Chameleon Labs 7603"
Verified Customer zZounds has verified that this reviewer made a purchase from us.
This mic preamp sounds excellent - it has a very cool full tone for vocals. The eq is super smooth - I would definitely recommend this to anyone looking for a quality mic preamp. For the price, I think it's an excellent value.
4 of 4 people (100%) people found this review helpful. Did you?
Thanks for your opinion!
Shipping to
Chat With Us