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Speck Electronics ASC-V 500 Series 4 Band EQ

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The Speck Electronics ASC-V 4-Band Equalizer is a professional single channel 4-band equalizer in a 5.25” vertical module compatible with API Audio 500-series rack frames. It is is useful...and it delivers the high quality and specifications found in all Speck Electronics gear.

This compact 4-band parametric equalizer has 12 controls for equalization adjustment that covers the audio spectrum from a low 25Hz all the way up to 25kHz. To enhance the classic EQ experience, the ASC-V offers both transformer-balanced and active-balanced outputs.

4 Sweepable Bands

L Band - a low band that sweeps the low frequencies from 25Hz - 400Hz. 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 adjusts the high frequency from 2kHz all the way up to 25kHz. This band also offers a Peak/Shelf select switch.

The Rear Panel

In addition to the standard rack friendly edge connector, the ASC-V has a set of 1/4" TRS input/output jacks, and a power input connector. With these I/O connectors and the optional power module, you can ignore the PC edge connector and use the ASC-V as a stand alone EQ.

A mounting base that will hold a single EQ or a pair of the ASC-V's.

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


  • Unified 5.25" vertical module format that is compatible with API-style 500-Series racks.
  • Unique design allows module to be operated without rack. Can be self-powered and has 1/4" TRS I/O jacks.
  • Transformer and Active-balanced outputs.
  • Optional base kit can hold 1 or 2 ASC-V’s for tabletop operation.
  • Captive mounting screws stay with the module and extend to pull the module out of the rack.
  • Frequency Response 2Hz-135kHz (+0/-3dB)
  • THD+n 0014% @ +24 dBu
  • Residual Noise -102dBu (22Hz-22kHz)
  • Maximum Input/Output Level +28dBu /+28dBu
  • Input Impedance 30K Ohms (Balanced) 15K Ohms (Unbalanced)
  • Output Impedance 600 Ohms (Transformer-balanced 60 Ohms (Active-balanced)
  • Dimensions HxWxD=5.25" x 1.59" x 5.9" (133mm x 38mm x 150mm)
  • Rack Power Requirements +/- 16VDC @ 35ma
  • External AC Power Supply 120VAC or 230VAC
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