Phono Preamplifier

Sonus Veritas has designed a quiet, versatile phono preamplifier that uses an unconventional approach to support the goal of extracting the maximum pleasure from your LPs. We focused our efforts on developing a phono preamplifier with the following goals in mind:

  • Very quiet input stage to ensure that preamplifier noise is never an issue that detracts from low level musical detail resolution, even with the lowest output MC cartridges
  • Enough gain to accommodate very low output MC cartridges and enough gain flexibility to also allow the use of high output MC or MM cartridges
  • Low impedance unbalanced (RCA) and balanced (XLR) outputs to enable a high quality interface with all preamplifiers and integrated amplifiers
  • Stabilized vacuum tube operating conditions so that no adjustments are ever necessary to get the best performance throughout the life of the preamplifier, even in the face of tube changes

After experimenting with a number of approaches, we chose a three stage differential transformer-coupled topology that satisfies the goals above and provides a vinyl replay experience that has to be heard to be believed. Some of the technical attributes of this choice include:

  • Differential circuitry, which rejects common mode noise resulting in cleaner sound reproduction
  • Tube amplification circuitry supported by solid state devices, which provides a near ideal operating environment, for the preservation of music quality
  • Use of Lundahl audio coupling transformers manufactured with high technology amorphous metals to facilitate the optimal interface with phono cartridges and preamplifiers


  • Two balanced/unbalanced (RCA) stereo inputs (XLR input jacks optional)
  • One stereo unbalanced (RCA) output and one stereo balanced (XLR) output
  • Flexible grounding options for inputs and outputs to eliminate ground loop hum/buzz
  • Mute, polarity inversion, stereo/mono, gain, and panel light brightness controllable on the front panel
  • Resistive cartridge loading, MC input gain, and MM/MC selection controllable on back panel
  • Remote control for power, mute, polarity inversion, stereo/mono, gain, panel lights
  • Innovative TubeLife Monitor that indicates when tubes should be replaced

Gain (with MC Input Transformer in circuit)
64db, 70db or 76db
Gain (without MC Transformer in circuit)
46db or 52db
Output Impedance
High Gain Mode: 400 ohms Low Gain Mode: 100 ohms
Maximum Input (@1KHz without MC Transformer in circuit)
70mV RMS
Maximum Output (@ 1KHz)
Frequency Response
Within 0.3db of the RIAA standard across the audio band with intentional response band limiting to -0.5db @ 20Hz and 20KHz
Tube Complement
2 x 6N23P (6922 equivalent), 4 x 6N30P (6H30pi)
50 lbs (22.7 kg)
Shipping Weight
54 lbs (24.5 kg)
18” W x 5” H x 15” D (46 W x 13 H x 38 D cm)

Please contact us directly for Warranty details.

One or both inputs populated with pure Silver input transformers

XLR input jacks

One cartridge loading resistor - customer selected value

Contact us for other possible options