Item #: CHL 7603XMOD LIST

Chameleon Labs 7603 XMod 1-Channel Microphone Preamplifier

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Product Description

Displaying the same high dynamics and low distortion as the "vanilla" 7603, the 7603-XMod simply provides a different character to the sound of the pre-amplifier. As with the 7603, the fundamental design architecture of the 7603-XMod retraces the path of revered, classic pre-amps of the past as well as our popular 7602, however Chameleon has chosen to continue the tradition created by the 7602-XMod, allowing users to revel in the character and performance afforded by Carnhill's legendary English components.

Chameleon Labs 7603 XMod 1-Channel Microphone Preamplifier Features
  • UK Carnhill Microphone and Line Input transformers and Carnhill UK output transformer, all with mu-metal housings
  • High resolution, low noise discrete audio circuitry
  • Hi-Z Direct Instrument Input (TRS)
  • Discrete Class A Electronic Topology
  • Three band, inductor based EQ
  • 48V phantom power for mic input
  • Selectable 300Ω or 1200Ω Mic Input Impedance
  • Custom VU meter (input/output) with calibrated ballistics
  • Relay based selection of Line / Mic & DI Inputs
  • Overload input and output indicators
  • Reverse Phase Switch
  • Universal, on-board power supply
  • "MADE in the USA"---Seattle.
Once your audio exits the input transformer, our circuit boards are carefully crafted to ensure the highest possible signal integrity. As a starting point, we developed a new discrete audio input gain stage based on our vision for a solid topology that provides extremely low noise, high dynamics and extreme bandwidth. All of the 7603-XMod’s operational amplifiers used throughout the device are based on this topology.

The 7603-XMod features EQ stages with four different available adjustments—Variable High Pass, Low Frequency Shelving, Mid Frequency and High Frequency Shelving. Our engineers made a conscious decision to stay with the same, desirable, inductor-based topology that made our 7602 so popular, however we implemented our new discrete Op Amp to drive signal through a new set of custom Chameleon designed and manufactured inductors, providing the musicality we all love to use.

Its output stage is unique with respect to its design and performance. It can be described as a variable gain circuit that simultaneously adjusts both the input and output levels in order to generate a lower noise floor and extraordinary audio performance.

CALIFORNIA PROPOSITION 65 WARNING
warning WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.
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Product Specifications

Chameleon Labs 7603 XMod 1-Channel Microphone Preamplifier Specifications
  • On Switch: Turn Pre Amp On - VU Meter Light
  • 300Ω / 1200Ω Switch: Switch between 300Ω and 1200Ω input impedance for the mic input
  • 48V Power Supply Switch: On/Off
  • DI Switch: Direct Input with 100KΩ 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: 300Ω or 1200Ω
    • Line: 10kΩ line bridging from 600Ω or lower source impedance
    • Direct Input: 100kΩ
  • 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 600Ω input impedance, SNR 116dB at maximum output
    • Output Type: Transformer balanced and floating to drive 600 Ω load
    • Maximum Output: +28dBu into 600Ω 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

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