VTSP-3A(r03) Vacuum Tube Stereo Preamplifier (Revision r03)
With Remote Control

VTSP-3A Front Panel
front panel
VTSP-3A Rear Panel
rear panel

2011 Positive Feedback award"The overall and distinctly noticeable effect has been to make listening to music more enjoyable and another step closer to realistic. For music lovers that may be all that needs to be said."

"It is time for some serious listening to be done. I am not going to give you a litany of recordings to try to show off some specific aspects of this newest Herron creation. That is not where the appeal of this music reproducer lies. It lies in making your experience with listening to a favorite recording more satisfying than ever before. The fact that it has a tad (a southern word meaning a little bit or definite hint) more bass fullness, richness and power in the mid to upper bass is only a part of overall experience and does tend to reveal its vacuum tube heritage. The audibly extended high frequency response has its own attraction at the same time being silky smooth and sweet while revealing even more inner detail. That is a really tough balancing act for an audio designer to successfully accomplish. It also appears to be more extended and very definitely adds the natural sensation or feeling of the recording location and strong hints of its size! That is probably at least partly responsible for the added detail as is the seeming lack of background noise. This is a very quiet preamplifier and listeners may find it even quieter in the lower gain mode."

"The all-important mid-range extends from its lower reaches adds detail and presence to the bass, to its upper extremes giving body to beautiful harmonic overtones is where music lives. The Herron vacuum tube VTSP-3 preamplifier makes that all important range come nearly alive, and the better the recording the closer it comes and the more the music will be savored, enjoyed and appreciated. It is as if the listener is moved a few rows closer to the orchestra compared to the previous VTSP-2. I must award Keith Herron's model VTSP-3 preamplifier my highest possible recommendation and hope that many music lovers will have the opportunity to discover it for themselves."
- Karl Lozier Positive-Feedback Online Issue 35

VTSP-3A Remote Control Remote control functions
  • Input Selection
  • Absolute Polarity
  • Display Brightness
  • Volume, Mute, and Mono/Stereo

Design Considerations

 Frequency Response 1 Hz to beyond 100 kHz, 20 Hz to 20 kHz ±0.1 dB
Output Impedance 100 ohms nominal at 1 kHz
Input Impedance 100,000 Ohms
Gain 14 dB in Hdb mode, 8 dB in Ldb mode
Volume Control 100-position electronic stepped attenuator, maximum differential 0.1 dB channel to channel
Distortion <0.01% THD + Noise @ 1 volt r.m.s. output
Absolute Polarity Switchable
Dimensions 17.6" wide x 4" high (including rubber feet) x 10.25" deep
Warranty 3 years, parts and labor; tubes: 90 days

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Herron Audio, div. of Herron Engineering, Inc.