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Speck ASC Transformerless EQ – No Longer Available

Transformerless 4-band equalizer with active balanced output - 120v North American version

Product Description

Use this non-transformer version of the ASC equalizer in combination with The MicPRE 5.0. It already has transformer-balanced out' s forming a channel strip.

The Model ASC is a professional single channel 4 band equalizer in a 1/2 rack format. The Speck Model ASC is reminiscent of vintage equalizers, revered for their dynamic range and musical performance.

This compact 4 band parametric equalizer has 12 controls for equalization adjustment that covers the audio spectrum from a low 20Hz all the way up to 25kHz.

There is a - 12/+6 dB gain control that handles the level variations when patching between balanced and unbalanced gear. A bypass switch silently removes the equalizer from the audio path.

Connect the ASC to virtually any line level source: balanced, unbalanced, or mixer inserts. The Model ASC has high headroom that will handle balanced signals up to +28dBu.

Under normal operating conditions, both versions sound about the same. The transformer (Jensen Transformer) does add a subtle texture to the overall sound. It sounds different than the active-balanced output (the sonic difference is kinda hard to describe).

Both outputs have a "clean & clear" sound. Although, when the transformer version is pushed to its maximum output limits, the transformer will exhibit a slight, almost soft distortion at low frequencies. That's the transformer sound!

The "ASC-T" features both transformer and non transformer balanced outputs (the "TRS" output can be run either balanced or unbalanced... and can be used simultaneously to avoid DAW latency if desired.


The main difference between the ASC and the ASC-T is that the ASC-T has the choice of a transformer or transformerless output where with the ASC you only have transformerless output. There is a distinct sonic difference between going through the transformer and going transformerless... with the ASC-T you get the choice of two sonic output differences.

Product Specifications

Condition New
Tube or Solid State Solid State
Channels Single-Channel
Chassis Desktop
Digital I/O No
EQ Type Parametric

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I would like to thank VK for the wonderful sales assistance, service and prices. This was my first purchase with you and it won't be my last. I only wish I'd discovered you years ago!
Matthew R.
I had two Grammy wins this year - Ray LaMontagne & Carolina Chocolate Drops. Both made with help from Vintage King!
Ryan F.
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.