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Tube-Tech SSA2A #10333 (Used) – No Longer Available

Tube-based stereo summing amplifier

Product Description

The SSA 2A is a stereo summing amplifier from Tube Tech that performs summing of up to eight stereo pairs of input channels down to a single stereo output. The unit also has four mono inputs ready for hard-center panned tracks such as kick, snare, bass and lead vocals.

Many users of Digital Audio Workstations (DAW) have experienced dissatisfaction with the internal digital summing of their systems. Providing the best of both digital and analog worlds, summing amplifiers can provide a more open, clear and punchier sound, allowing the mix to sounds like it was done on an expensive analog console.

The SSA 2A is a symmetrical two-stage amplifier, designed around two dual, low impedance and high transconductance triodes. The input transformer is part of the dual feedback configured as a so-called zero field transformer. The output stage is designed around two dual triodes in push-pull and an output transformer (with a static screen.) Both the summing amplifiers and the output amplifiers are symmetrical.

Note! It is important that the mono inputs are connected to outputs (even if not used) or terminated by shorting plugs to prevent additional noise

  • Stereo summing amplifier featuring two very low noise/low distortion summing amplifiers with a very wide frequency response
  • Eight stereo plus four mono inputs to one stereo output
  • Twenty-three step gold plated output gain control
  • Fully symmetrical circuitry from input to output
  • Zero field transformer balanced inputs
  • Two large VU meters display output level

Product Specifications

ConditionUsed / Vintage
Tube or Solid StateTube
ChannelsDual-Channel
Number of Inputs16
Number of Outputs2
Channel InsertsNo

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In almost 20 years in Pro audio buying, never did I receive a unit so well packed and exactly as described. Works flawlessly. The whole process has been so smooth. I will never hesitate to do business with you guys in the future and will recommend you to everyone I know.
Martin C.
This was my first experience buying something from Vintage King (although I surf the "used" categories on the website frequently!), and, despite being on the other side of the world, I had absolutely no trouble and everything went very smoothly.
Phil T.
The speed of delivery exceeded my expectations! I was VERY pleased that my shipment arrived in time for a scheduled vocal tracking session. The packing insured that my order arrived safely. And the sales staff responded quickly to questions regarding the product.
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