• A4
  • A4
  • A4


Discrete Class A16:2 Summing Mixer

British Summers Just Got Better...

The Ebony A4 is the latest addition to TL Audio’s newest range, the Ebony Series – a sleek looking range of black Discrete Class A Processors.

The A4 is a 16:2 summing mixer housed in a 2U unit and features 16 balanced inputs on TRS and D-Sub with individual pan controls. All inputs are also switchable between +4 and -10 for greater flexibility.

The unit uses top quality Discrete Class A circuitry throughout for a pristine signal path and a clean and precise sound. The Ebony Summer also boasts the clever ability to activate an optional tube stage on the master bus; once activated, you can simply dial in the exact amount of warmth you want from a dedicated dual triode tube stage - offering your recordings an unbeatable depth, warmth and finish in the way that only tubes can.

The addition of balanced insert points on the master bus section also means that you can patch in a stereo compressor / EQ (like the Ebony A2) and gain a complete professional mastering solution and back end to your system. Not only beautiful in appearance with its high gloss black finish, brightly lit VU meters and ‘alloy’ looking dials, but also in sound with its flexible options for clean and pristine to smooth, detailed and warm, it is also beautiful in it’s name and affordability, proving to be the most cost effective discrete Class A and tube summing solution on the market.

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  • Discrete Class A Electronics
  • Dual Triode ECC83 tube stage in master section
  • Variable drive control
  • Ability to switch tube in and out of circuit path
  • 16 Balanced inputs on TRS / D-Sub
  • 16 individual pan control
  • Inputs switchable +4/-10
  • Balanced inserts on master bus
  • Balanced outputs
  • Analogue VU metering with Peak LED’s
  • Sleek design and smooth precise sound
  • Rackmountable (2U)
  • Hand Made In England
  • Shipping late August 2008
  • Inputs: Balanced, via 3 pin TRS jack, or 25pin D-Sub per 8 channels.
    Input impedance: greater than 10Kohm.
    Nominal Level +4dBu or -10dBu, switched in banks of 8
  • Pan Controls: -3dB at centre.
    Attention when panned fully left or right: 60dB.
  • Tube Stage: Switchable tube stage on stereo mix, pre insertion point.
    “Warmth” control varies THD from typically 0.3% to 10%,
    predominately second harmonic.
  • Insertion Point: Balanced, via separate 3 pin TRS jack send and return.
    Nominal level +4dBu or -10dBu.
  • Drive LEDs: Variable intensity, from 0dBu to +12dBu, indicating increasing
    Tube drive.
  • Tube Peak LEDs: Illuminates when tube stage is overdriven into clipping.
    Master Level: Maximum Gain +6dB.
  • Output Peak LEDs: Located above VU meters, illuminate at +22dBu on output
    at +4dBu nominal level, or +8dBu at -10dBu nominal level.
  • Outputs: Balanced, via 3 pin XLR connectors.
    Nominal level +4dBu or -10dBu.
  • Maximum Level: +26dBu, Input to Output @ 0dB gain and +4dBu nominal
  • Frequency Response: +0, -1dB, 10Hz to 25KHz.
  • Distortion: 0.012% at 1KHz.
    0.05%, 20Hz to 20KHz.
    (At +4dBu input and output and 0dB gain, tube stage out).
  • Hum and Noise: -83dBu unweighted, at 0dB gain and +4dBu nominal level.
    VU Meters: Illuminated moving coil, 0VU = +4dBu (or -10dBu).
    “+10dB” switch shifts 0VU to +14dBu (or 0dBu).
  • Dimensions: 2U, rack mounting or free-standing.
    483mm W x 220mm D x 88mm H (19.0” x 7.9” x 3.5”approx).
  • Shipping weight: 6Kg.
  • Power Requirements:
    Internally set to 230V 50Hz or 115V 60Hz operation.
    Detachable IEC power cord.
  • Power consumption: 36VA.
  • There are no options available at this time