Chameleon Labs 7603 XMOD Microphone Preamplifier & EQ

Chameleon Labs 7603 XMOD
The Chameleon Labs 7603 XMod is a discrete Class A mic preamp and EQ, featuring Carnhill UK transformers and inductor-based equalisation for detailed, musical tone, with global-ready power and premium components throughout.

Chameleon Labs 7603 XMOD Microphone Preamplifier & EQ Details

The Chameleon Labs 7603 XMod is a Class A microphone preamplifier and equaliser, built with hand-selected components and a focus on rich, musical tone. It features discrete circuitry and a carefully engineered signal path that incorporates Carnhill UK microphone and output transformers, along with a Chameleon Labs custom-wound line input transformer housed in MuMetal for minimal interference and maximum sonic integrity.

Designed as an evolution of the original 7603, the Chameleon Labs 7603 XMOD offers refined character and exceptional performance whether used as a front-end preamp for tracking vocals, acoustic instruments, and bass, or as a stereo pair on your mix buss for final tonal shaping.

Its three-band inductor EQ provides detailed tonal control with musical response, while a variable gain output stage allows precise level setting with minimal noise. The unit also offers high-pass filtering, switchable input impedance (300Ω or 1200Ω), a phase reverse switch, LED indicators for input and output overloads, and a VU meter for level monitoring.

A TRS instrument input on the front panel ensures flexibility for direct injection needs. The Chameleon Labs 7603 XMOD’s internal universal switchmode power supply allows worldwide operation without external conversion. Every internal component is deliberately selected and laid out to maintain the sonic excellence Chameleon Labs is known for.

Manufactured in North America, the Chameleon Labs 7603 XMOD merges meticulous construction with British-flavoured tone and modern engineering, making it a reliable and musical tool for studios around the world.

Features

  • Carnhill microphone input transformer
  • Chameleon Labs custom-wound line input transformer in MuMetal
  • Carnhill output transformer
  • Hi-Z direct instrument input (TRS)
  • Discrete Class A electronic topology
  • Variable gain, low noise output stage
  • Input and output level monitoring via VU meter
  • Selectable 300Ω or 1200Ω mic input impedance
  • Inductor-based equalisation and high pass circuit
  • Input and output level overload indicators
  • Reverse phase switch
  • Internal universal power supply

Specifications

Released in: 2017
Made in: U.S.A.
  • Microphone input impedance: 300Ω or 1200Ω
  • Line input impedance: 10kΩ line bridging from 600Ω or lower source impedance
  • Direct input impedance: 100kΩ
  • Microphone sensitivity: From -70dBm to -20dBm in 5 dB steps for 0dBm output
  • Line sensitivity: From -30dBm to +20dBm in 5 dB steps for 0dBm output
  • Noise specification: Better than -125dBm EIN between -80 and -40dBm, referenced to 600Ω input impedance, SNR 116dB at maximum output
  • Output type: Transformer balanced and floating to drive 600Ω load
  • Maximum output: +28dBu into 600Ω load impedance
  • Frequency response: 10Hz – 20kHz -0.5dB, 10Hz – 50kHz -1dB
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