The ASC and ASC-T have been discontinued and replaced with the new EQF 810 parametric equalizer.
Closeup View

What is the ASC? 4 Sweepable Bands
The Model ASC is a professional single channel 4 band equalizer in a 1/2 rack format.
It is is useful...and it delivers the high quality and specifications found in all Speck Electronics gear.
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.
An bypass switch silently removes the equalizer from the audio path.
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)
(Requires Adobe Acrobat Reader)
Closeup View
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.

Video product demonstration
by Front End Audio.

Read the ASC review in
Pro Audio Review Magazine

The Designer
The ASC is the work of Vince Poulos, the designer and owner of Speck Electronics.

Speck Electronics has been producing quality professional audio products for over 45 years.  Founded in 1973, Speck Electronics has consistently provided innovations in audio products for all segments of professional recording and touring.

Other products include the via Fader Outboard Fader System, the X.SUM rack mixer, the ASC-V 500 series equalizer, and MicPre 5.0 preamp.

Model ASC is an exclusive Trademark of Speck Electronics.