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Speck Electronics Model ASC (Transformer output)  From Speck

Four Band Equalizer

Speck Electronics

Manufacturer's Description from Speck

The Model ASC is a professional single channel 4 band equalizer in a 1/2 rack format.

It is simple...it is useful...and it delivers the high quality and specifications found in all Speck Electronics gear.

4 Sweepable Bands

L Band - a low band that incorporates a "Simulated Inductor" (si) design that sweeps the low frequencies from 20Hz - 150Hz. This band offers a Peak/Shelf select switch.

L/M Band - a switchable low and mid band. This fully parametric section can be switched between a low frequency band that sweeps from 40Hz- 800Hz, or a mid frequency band that sweeps 400Hz-8kHz. This band has a variable bandwidth adjustment.

M Band - a fully parametric mid band with a frequency sweep range from 400Hz to 10kHz.

H Band - a high band that also incorporates a “Simulated Inductor” (si) circuit that adjusts the high frequency from 4kHz all the way up to 25kHz.

That Classic Sound                 

You'll hear none of the thinness and edginess experienced with some other outboard EQ devices. The Speck Model ASC is reminiscent of vintage equalizers, revered for their dynamic range and musical performance.                   

The Front Panel                      

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.

The Rear Panel

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.

To enhance the classic EQ experience, the Model ASC offers balanced transformer and active balanced outputs.

Speck Electronics

About Manufacturer

Speck Electronics has been producing quality audio mixers, equalizers, and preamps for all segments of professional audio recording and touring for over 25 years. Our products include the Xtramix compact audio mixer, the Model ASC equalizer, and MicPre 5.0 microphone preamp. Our future goals are to expand our product line with analog hardware complementary with the current line of DAW's and Desktop Recording.


Frequency Response
2Hz-154kHz (-3dB)

THD+n (Output +24dBu)

Noise (22Hz-22kHz)

Maximum Input Level

Maximum Output Level
+28dBu (Active-Balanced output)
+24dBu (Transformer-Balanced output)

Input Impedance
20K Ohms (Balanced)
10K Ohms (Unbalanced)

Output Impedance
60 Ohms (Active-Balanced output)
600 Ohms (Transformer-Balanced output)

Phase Deviation
7.6 degress @ 20KHz


Square wave response (10KHz)
1.6usec rise time (10%-90%)

WxHxD=1.75" x 8.5" x 7.25"
(44mm x 216mm x 178mm)

Power Requirements
16 VAC external power module
(120 VAC or 230 VAC models available)

Shipping Weight
6Lbs (2.7kg)






ASC Reference Manual

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