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Velodyne SMS-1 Subwoofer Parametric EQ System Review

by , April 09, 2006
Contributors: Gene DellaSala
Velodyne SMS-1 Subwoofer Parametric EQ System

Velodyne SMS-1 Subwoofer Parametric EQ System

  • Product Name: SMS-1 Subwoofer Parametric EQ System
  • Manufacturer: Velodyne Acoustics
  • Performance Rating: StarStarStarhalf-star
  • Value Rating: StarStarStarStar
  • Review Date: April 09, 2006 19:00
  • MSRP: $ 749
  • Operating Frequency Range: 15Hz - 200Hz
  • LCD display: Indicates volume, preset and operating modes (Auto-EQ, mute, night-mode)
  • Modes: Auto or manual parametric EQ
  • Remote: IR remote control
  • THD: < 1%
  • Digital Presets: 6 presets for customized listening modes and EQ defeat
  • Digital Phase: 0° to 180° (variable in 15° increments)
  • High-Pass Crossover: 80 Hz (6dB/octave slope)
  • Low Pass Crossover: 15 Hz - 200Hz (adjustable) 6 dB/octave initial, to 48dB/octave ultimate
  • Subsonic Filter: 15 Hz - 35 Hz (adjustable) 12 dB/octave initial, to 48 dB/octave ultimate
  • Polarity: Adjustable (+/-)
  • Auto On/Off: Yes
  • Inputs: Balanced (XLR), Line-level (RCA), Speaker-level
  • EQ Outputs: Line-level (RCA), Balanced (XLR)
  • Other Outputs: Thru-put (RCA), High-Pass (RCA) (fixed at 80 Hz)
  • Crossover Bypass: Yes
  • Daisy Chain Feature: Yes
  • Accessories: Rack mount ears, full feature remote control, power supply with cord, Digital Drive accessory kit consisting of mic, tabletop mic stand, mic windscreen cover, mic stand adapter, 6 ft audio cable, 12 ft video cable, 20 ft XLR mic cable
  • Dimensions: 2.0" H x 16.5" W x 6.5" D (no rack ears)
  • Warranty: 2 years (parts/labor)
  • Weight: 17 Pounds


  • Automatic or manual subwoofer calibration
  • On-screen display
  • 8-band fully parametric EQ
  • Includes microphone and various mounts
  • Multiple SMS-1 units can be daisy-chained
  • Works with any subwoofer


  • 3rd octave smoothed frequency response graph
  • Non independent EQ'd subwoofer outputs
  • Inaccurate (aggressive) auto calibration


Velodyne SMS-1 Subwoofer Parametric EQ System Introduction

We were introduced to the Velodyne SMS-1 system at the CEDIA show in Indianapolis last year and were instantly impressed with its potential for improving how subwoofers interact with the room. The SMS-1 is basically Velodyne’s flagship Digital Drive room correction software offloaded into a standalone system that allows it to be used with any (even *gasp* non-Velodyne) subwoofers. The SMS-1 is essentially an 8-band parametric EQ with variable frequency, Q, and gain that shows you a real-time smoothed graph of the room’s low frequency response from 15Hz to 200Hz via an on-screen display.

What does this mean for you? Well, in a practical sense, those of you desiring the most out of your subwoofer and room can make changes to your system in real-time and see the results on-screen. Additionally, once you’ve found the optimal positioning and phase settings, you can provide the final touches to your bass response using the integrated EQ system – taming room modes and eliminating some of the peaks and dips that are inherent to almost every system.

About the author:
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Clint Deboer was terminated from Audioholics for misconduct on April 4th, 2014. He no longer represents Audioholics in any fashion.

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