Aphex Channel - Master Preamp and Input Processor

Aphex Channel - Master Preamp and Input Processor

Aphex Channel - Master Preamp and Input Processor

B&H # APCHANNEL MFR # CHANNEL
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Expected availability: 7-14 business days

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
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Aphex Channel overview

  • 1Description

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.
De-Esser
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).
UPC: 693714023016
In the Box
Aphex Channel - Master Preamp and Input Processor
  • Power Cable
  • Manual
  • Limited 2-Year Warranty
  • Table of Contents
    • 1Description

    Aphex Channel specs

    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)
    Packaging Info
    Package Weight 8.15 lb
    Box Dimensions (LxWxH) 22.6 x 10.9 x 4.7"

    Aphex Channel reviews

    Channel - Master Preamp and Input Processor is rated 5.0 out of 5 by 1.
    Rated 5 out of 5 by from If You Want that Big Voice... ... This is the unit you need. For that deep, rich and smooth like butter voice. But apply it carefully! Like eye makeup, the right amount enhances, beautifies and seduces. But too much or the wrong color, and yikes! Things get pretty awful in a hurry. And the Channel Master really is that, a cosmetic treatment to enhance the character and timbre of your voice. Feed it first with a top-notch microphone. A great fit for my post-production voiceovers is the EV RE27. Then lightly, gently apply the Channel Master's effects. Like a chef adds a dash of spice to boost flavor, but not so much that the food itself is overshadowed. It is easy to overdo it with the Channel Master... if a little bit of Big Bottom or the Aural Exciter sounds nice, then a little more will sound even better, right? No, no. A gentle touch is the key. Take your time, keep adjustments subtle... and when you're done and ready to mix, you will be astounded by the quality and clarity that the Channel Master has enabled. I run it via A/SPIDF into an RME Fireface UCX which serves Word Clock and routes firewire into my Mac and Adobe Audition. I've been doing voiceovers for TV and radio for 40 years, and I've used all the gear and tried all the tricks. This lashup is clean, simple and the best I've ever heard, and helps make me today the best I've ever sounded. Meanwhile, B&H is marvelous, I've always found their service, advice and price to be the best.
    Date published: 2015-04-21
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