Aphex Channel Master Preamp and Input Processor

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  • Product Highlights
  • Designed for Studio, Stage & Broadcast
  • Ultra-Wide Bandwidth RPA Tube Preamp
  • Built-In Aural Exciter
  • Big Bottom Bass Enhancer
  • Patented Wave Dependent Compressor
  • Parametric EQ, De-Esser, and Gate
  • Reference-Quality Internal Clock
  • Front-Panel Instrument Input
  • Insert Send-and-Return Jacks
  • Cough Switch for Output Muting

Master Preamp and Input Processor

Complete High Performance Channel Strip
With more and more studios foregoing consoles in favor of recording and mixing "in the box", a clean and versatile front end input stage is indispensible. There are dozens and dozens of channel strips and similar devices to choose from, but none that come close to the Channel in terms of sound, features, or performance.

Our legendary Model 230 has been re-imagined as the Channel, adding a host of new features to address a greater number of workflows while retaining the sound, functionality, and versatility that made the 230 one of the most in-demand processors ever for professional audio, live sound, broadcast, and post production.

Channel incorporates seven powerful devices within a compact, single rack space design, including five of Aphex's exclusive patented technologies. Together, the result is the highest possible audio quality, processing power, and flexibility available.

The elegant front panel not only looks great, but is laid out in an intuitive, easy-to-use workflow with easy to understand labeling. Building on the foundation of the Model 230, the Channel features an instrument input, dedicated output and gain reduction metering, front panel sample rate and clock source selection, and a reference quality internal clock.
  • Patented RPA tube preamp
  • EasyRider Class A automatic compressor
  • Patented logic-assisted gate
  • Universal de-esser
  • Patented Aphex Aural Exciter and Big Bottom processors
  • S/PDIF and AES/EBU digital outputs
  • Connector: XLR-3F
  • Type: Transformerless, NPN active balanced, tube second stage
  • Input Z: 2k ohms nominal
  • Maximum Input Level (MIL): +25dBu
  • CMRR: >70 dB @ 60 Hz
  • Nominal Preamp Gain: 20 to 65 dB
  • Phantom Power: +48VDC
  • Pad: 20dB
  • EIN: -127dBu (Input Shorted)
  • Tube Type: 12AT7/ECC81 Dual Triode
  • Connector: XLR-3M and 1/4" TRS Phone Jacks
  • Type: XLR is Impedance Balanced (may be used unbalanced); TRS is unbalanced
  • Out Z Balanced: XLR 66 ohms
  • Out Z Unbalanced: XLR 33 ohms; TRS 600 ohms
  • Nominal Level: XLR +4dBu; TRS -10dBV
  • Maximum Output Level: +25dBu Unloaded; TRS +11dBV
  • Attack / Release: Program dependent, user variable release baseline
  • Ratio: 4: 1
  • Threshold: Fixed
  • Knee: Medium Hard
  • GATE
  • Attack: 0.1 millisecond
  • Hold / Release: 300 milliseconds / 400 milliseconds
  • Threshold: Variable -50 to +20dB
  • Depth: Variable, 1 to 58dB
  • Attack: 0.1 millisecond
  • Release: 100 milliseconds
  • Threshold: Variable -20 to +20dB
  • Ratio: 5: 1
  • Active Band: 4 kHz to 20kHz Linkwitz-Riley 24 db/octave crossover
  • Connector type - Send: 1/4 TRS Phone Jack, Balanced
  • Connector type - Return: 1/4 TRS Phone Jack, Balanced
  • Nominal Operating Level: 0 dBu
  • Point of Insertion: Between dynamics processing and equalizers
  • Frequency: 50 Hz to 280 Hz
  • Tune: Off to +12dB
  • Frequency Tune: 240 Hz to 8 kHz
  • Peak / Dip: ±12dB
  • Q Range: 0.5 to 5
  • Frequency Tune: 500 Hz to 5kHz
  • Mix: Off to +12dB
  • THD
  • IMD
  • Freq Response (Flat): 18 Hz to 24kHz ±1dB
  • Internal Sample Rates: 44.1KHz, 48KHz, 88.2KHz, 96KHz
  • External Sample Rates: Automatically syncs to any word clock between 32KHz and 96KHz
  • Resolution: 24 bits
  • Word Clock Input: BNC Jack, High Z, Captures
  • Word Clock Output: BNC Jack, 75 Ohms, 5Vp-p
  • Dynamic Range: Digital dynamic range greater than analog front end
  • Noise Dither: Dithered by analog preamp noise floor. Equivalent to 16-bit digital audio dither.
  • Level Equivalency: -20dBFS Digital = +4dBu Analog
  • Power requirements: 90-250 VAC 50-60 Hz 12W
  • Dimensions: 19"W x 1.75"H x 8.25" D 1 Rack U (482.6mm x 44.5mm x 209.6mm)
  • Depth Behind Front Panel: 7.5" (190.5mm)
  • Net Weight: 6 lbs (2.73 kg)
  • Shipping Weight: 9 lbs (4.1 kg)
  • Broadcast - Channel is a tube microphone preamp and signal processor that is an indispensable broadcast station tool. You'll find them in the production room and installed as permanent on-air processing for pumping up voices.
  • Recording Studios - Channel is a powerful and easy-to-use channel strip for commercial and project studios, featuring our reflected-plate amplifier tube microphone preamp design plus compression, gating, de-esser, parametric EQ, Aural Exciter, and Big Bottom bass enhancement. It is an extraordinary single rack unit that offers seven of Aphex's most popular tools to help you work more easily and naturally, achieving the sonic quality you want without having to connect several devices.
  • Live Sound - When space is at a premium in a touring rig, and night after night reliability is essential, the rugged Channel provides all the top quality processing needed for any instrument without taking up precious rack space.
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