Signature SG Systems Preamplifier

Above: Our Flagship Strain Gauge Preamp - the SG-810

By the way....All Soundsmith SG systems have user replaceable styli - VIDEO is HERE !

  • The Strain Gauge cartridge is not at all like any other cartridge....

  •  All other cartridges, whether moving magnet, moving coil, or moving iron, are "generators" - that is, you put motion in, and you get energy out... they generate a tiny voltage that you amplify and send to your speakers.

  •  The key here in describing all other cartridges is in the word moving......because all other cartridges MUST move a mass around - a magnet, and iron core with wires (moving "coil") or iron.

  •  All other cartridges are all magnetic generating systems, which require a mass to be constantly moved to generate a voltage. The Strain Gauge does not; the effective moving mass has been reduced by over 80%....allowing the stylus to stay in intimate contact with the groove walls.....and allowing the stylus to stop jittering - or "bouncing" in the groove as it now is not trying to move a "large" mass back and forth....


  • Frequency response, DC to 70 kHz
  • No "RIAA" filter circuitry is required or used in our preamp - just one ULTRA clean gain stage (this is because the Strain Gauge is a "displacement" device, not a "velocity" sensitive device like magnetic cartridges - see below).
  • Compatible with standard "4 wire" tone arm wiring
  • User Replaceable Nude "Contact-Line" stylus w/Ruby Cantilever (varied stylus types available)
  • System Price includes Strain Gauge Cartridge and Soundsmith SG Preamp of your choice
  • "Fixed" Line level & +10 dB variable outputs, both Balanced and Unbalanced (via RCA jacks)
  • High Compliance design and freedom from low frequency saturation assures excellent tracking ability and performance with any tone arm
  • All preamp models now feature toggling between the Strain Gauge function and single or (multiple) line inputs for maximum hookup flexibility to your equipment
  • Low tracking forces with extreme precision
  • Compatible with any ½" mount headshell - uses STANDARD 4 wire tone arm wiring
  • Frequency response DC - 70 kHz with only 10° of phase shift in the audio band (rumble filter built in @ 12 Hz - passive type before single flat gain stage
  • Front panel displays for tracking force (digital readout), AC component of the vertical tracking force, force balance per groove wall, and record eccentricity! (on models 810, 610,and 600 only)
  • Fixed and variable, balanced and unbalanced outputs via RCA jacks. Our variable output will provide up to +10dB level, and may be used DIRECTLY into any amplifier with balanced or unbalanced inputs.
  • Advanced muting features: Automatic Cue-Up muting (works with any turntable, and is user defeatable), manual muting control, and fault-sensing auto-mute to allow "hot plugging" of the tone arm or cartridge with the volume up, thus eliminating buzz or transients (allows stylus cleaning, adjustments, etc....)
  • User replaceable styli available in varied compliance and configurations (Ruby & Aluminum cantilever, Nude Contact Line &, Elliptical Styli,78 Styli) Styli replacement costs from $249.95 - $599.95
  • IR Hand Held Remote for remote controlled models controls volume, mute, power (and input switching on the SG-510 and SG-810)
  • All models feature front panel finger "light-touch" control switches for power, manual muting and front panel lighting control (on models 810,610 & 600) allowing adjustable front panel lights from "automatic room lighting level" to variable intensity - full bright to off. (All other models have rear manual control for lighting intensity) Our lucite volume knob changes color to indicate the state of operation:  RED (standby); Yellow (auto-mute); flashing yellow (manual mute); Blue (unmuted - playing)
  • Our Strain Gauge cartridge requires specialized preamp circuitry, and is sold with any of seven models of Soundsmith's preamplifiers - All models have both fixed and +10 dB variable outputs - and can be used directly into an "aux" input on your preamp, or used DIRECTLY into any power amplifier.
  • All models have identical sonic characteristics and vary only in features:
  • SG-810 - Our top model is a multi-function preamp and full function Strain Gauge Preamp; It features the SG function plus 4 line inputs & tape monitor, Front panel "touch" & Remote control input switching, volume, mute and power with full Strain Gauge performance displays and lighting intensity control (auto room adjust or manual "linear control" from lights off to full bright)
  • SG-610 - Dedicated Preamp for Strain gauge - Front panel "touch" & Remote control for volume, mute and power; full Strain Gauge performance displays; lighting intensity control (auto room adjust or manual "linear control" from lights off to full bright)
  • SG-600 - Dedicated Preamp for Strain Gauge - Same as 610, no remote control
  • SG-510 - Dedicated Preamp for Strain Gauge and full function preamp - SG input plus 4 line inputs & tape monitor; Front panel "touch" & Remote control for input switching, volume, mute and power  -NO DISPLAYS
  • SG-500 - Dedicated Preamp for Strain Gauge and full function preamp - same as SG-510, but no remote control
  • SG-410 - Dedicated SG Preamp - Remote & Manual control for Volume, mute & power
  • SG-400 - Dedicated SG Preamp only - Manual Volume, mute & power



    width height depth   weight
Product Name inches cm. inches cm. inches cm.   lbs. kg.
SG-410   15.750 40.005 4.125 10.478 15.500 39.370   18.50 8.39
IN SHIPPING BOX 33.500 85.090 9.500 24.130 20.250 51.435   28.50 12.93
SG-610   15.750 40.005 4.125 10.478 15.500 39.370   20.50 9.30
IN SHIPPING BOX 33.500 85.090 9.500 24.130 20.250 51.435   30.50 13.83
SG-810   15.750 40.005 4.125 10.478 15.500 39.370   20.50 9.30
IN SHIPPING BOX 33.500 85.090 9.500 24.130 20.250 51.435   30.50 13.83
SG-410/610/810 P.S. 6.250 15.875 3.250 8.255 9.000 22.860   4.00 1.81

Related Products

Strain Gauge Cartridge Systems

They Said What?

"The Voice ... is without a doubt the best non-moving coil cartridge I have heard and I would rank it in the top five of any cartridges I have ever heard."

- Jack Roberts, Dagogo

About These Products:

Contact Info

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Craig Dick, Product Specialist & Logistics Manager

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Chris Sommovigo,
Director of International Sales & Marketing