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Aphex Channel - Master Preamp and Input Processor

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You Pay: $999.00
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

The Aphex Channel is a fully featured, single-channel microphone preamp and channel strip that offers high-quality sound and a wide variety of signal processing. The 1U unit is a re-imagined version of the company's 230 preamp, and is designed for professional studio, stage, and broadcast applications. It sports an array of I/O including XLR mic and 1/4" instrument inputs; XLR and 1/4" outputs; AES/EBU, S/PDIF, and TOSLink digital outputs; and Wordclock in and out. Balanced 1/4" insert send-and-return jacks allow for patching in external processors.

The preamp is Aphex's patented Reflected Plate Amplifier (RPA) type, designed to provide ultra-wide bandwidth and maximum gain and headroom. It features a transformerless design, and contains a second-stage 12AT7/ECC81 Dual Triode tube.

The Channel is also equipped with six built-in processors including several patented Aphex effects. You get the Aural Exciter, for dialing in additional presence and clarity to the signal; Big Bottom, which provides deeper and more resonant bass; the EasyRider Class A compressor, featuring automatic adjustment of attack and release parameters based on the characteristics of the input signal; and the Logic Assisted Gate, which helps eliminate false triggers, clicks, and chattering. In addition, there's a fully parametric EQ band for adjusting the midrange frequencies between Big Bottom and the Aural Exciter, and a de-esser.

Patented Reflected Plate Amplifier
Ultra-wide bandwidth, maximum gain and headroom.
Lower operating temperature than conventional tube designs for longer tube life.
Each unit is individually tuned at the Aphex factory for unparalleled consistency any two units are a matched pair.
EasyRider Class A Compressor
Aphex's patented Wave Dependent Compressor automatically adjusts attack and release times according to program complexity.
No-Knee compression curve circuitry automatically adjusts compression ratio based on program levels.
Includes Aphex's 1001 Class A Voltage Controlled Attenuator, used in the Compellor and Dominator.
Logic Assisted Gate
Patented gate technology designed to avoid false triggers, clicks and chattering.
Split band universal de-esser designed to maintain presence while dramatically reducing sibilance on any voice.
Big Bottom
Patented technology for deeper and more resonant bass with little or no increase in peak output.
Parametric EQ
Gives you the ability to precisely fine tune the all-important midrange between the Big Bottom and Aural Exciter.
Aural Exciter
Patented technology for increased presence and clarity with improved detail and intelligibility.
Digital Outputs
AES/EBU, S/PDIF, and TOSLink digital outputs.
Cough-Switch Input
Handy for broadcast applications; mute the output on the fly using a handheld, desktop, or floor switch (switches not included).
Number of Channels Single
Mic Input Connector: XLR-3F
Preamp Type: Transformerless, NPN active balanced, tube second stage
Input Impedance: Mic: 2kΩ nominal
Maximum Input Level: +25 dBu
CMRR (Common Mode Rejection Ratio): >70 dB @ 60 Hz
Nominal Preamp Gain: 20 to 65 dB
Phantom Power: +48 VDC (switchable)
Pad: 20 dB
EIN (Equivalent Input Noise): -127 dBu (input shorted)
Tube Type: 12AT7/ECC81 Dual Triode
Instrument Input 1 x 1/4" TS phone
Impedance: 10mΩ nominal
Outputs 1 x XLR-3M (balanced/unbalanced)
1 x 1/4" TRS phone (unbalanced)
Output Impedance Balanced: XLR 66Ω
Output Impedance Unbalanced: 33 ohms (XLR); 600Ω (TRS)
Nominal Level: XLR +4 dBu; TRS -10 dBV
Maximum Output Level: +25 dBu Unloaded; TRS +11 dBV
Compressor Attack/Release: Program dependent, user-variable release baseline
Ratio: 4:1
Threshold: Fixed
Knee: Medium Hard
Gate Attack: 0.1 ms
Hold/Release: 300 ms/400 ms
Threshold: Variable -50 to +20 dB
Depth: Variable, 1 to 58 dB
De-Esser Attack: 0.1 ms
Release: 100 ms
Threshold: Variable -20 to +20 dB
Ratio: 5:1
Active Band: 4 kHz to 20 kHz Linkwitz-Riley 24 db/octave crossover
Insert Send: 1 x 1/4" TRS phone (balanced)
Return: 1 x 1/4" TRS phone (balanced)
Nominal Operating Level: 0 dBu
Point of Insertion: Between dynamics processing and equalizers
Big Bottom Frequency: 50 Hz to 280 Hz
Tune: Off to +12 dB
Parametric Equalizer Frequency Tune: 240 Hz to 8 kHz
Peak/Dip: ±12dB
Q Range:0.5 to 5
Aural Exciter Frequency Tune: 500 Hz to 5 kHz
Mix: Off to +12 dB
Frequency Response 18 Hz to 24 kHz ±1 dB (flat)
Digital Audio Internal Sample Rates: 44.1, 48, 88.2, 96 kHz
External Sample Rates: Automatically syncs to any word clock between 32 and 96 kHz
Resolution: 24-bit
Word Clock Input: 1 x BNC, High Z, Captures
Word Clock Output: 1 x BNC, 75Ω, 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: -20 dBFS Digital = +4 dBu Analog
Power Requirements 90-250 VAC 50-60 Hz 12 W
Dimensions and Weight Dimensions (WxDxH): 19 x 8.25 x 1.75" (48 x 21 x 4.5 cm)
Depth Behind Front Panel: 7.5" (19.05 mm) Weight: 6 lb (2.7 kg) Shipping Weight: 9 lbs (4.1 kg)
Aphex Channel - Master Preamp and Input Processor
  • Power Cable
  • Manual
  • Limited 2-Year Warranty
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