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Sebatron VMPQuadPlus 4 Channel Tube Mic Pre  From Sebatron

If you're the type of engineer/producer that prefers a bit more control over the degree of coloration in the signal then it might be a good idea to check out the VMPQuadPlus.



Retail:  $2,000.00

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Sebatron Audio- VMPQuadPlus

The Sebatron VMPQuadPlus is a four channel valve microphone preamplifier built on the shoulders of the Sebatron vmp-4000e. While both models share the most of the same biology the VMPQuadPlus has a few upgrades to build and circuitry that might suit the producer/engineer who desires finer control over valve colour rather than EQ.

  • Signal Chain
    • Sebatron VMPQuadPlus 4 Channel Tube Mic Pre

Manufacturer's Description from Sebatron

The VMPQuadPlus is very similar to the VMP-4000e in the sense that it is a four channel valve microphone preamplifier with the majority of the circuit being almost identical.The differences account for a slightly broader frequency response, a few db of extra gain and a lower reaching bottom but in most recording contexts the differences may be barely perceivable.

The omission of the 'deep' circuitry accounts for the extra db in gain and allows for the inclusion of the pad/gain control to further push the limits and fine tune valve colouration. This adjusts the level in between the two stages of the triode/valve leaving the normal/+12db toggle to adjust the degree of negative feedback around the first stage similar to the 4000e toggle.

In the 'normal' position a slight amount of negative feedback linearizes the first stage and makes it run more transparently whereas in the +12db position the circuit runs in 'open loop' with a pleasing coloured texture.

This allows for a very wide gain range and means the VMPQuadPlus can handle everything from hot Condensers to lightweight Ribbon signals without the use of external pads or lifters.

Other differences include the addition of a front panel face plate that improves shielding and provides some protecton to the toggle switches and a signal LED on each channel to indicate channel activity.

If your recording requirements extend beyond recording drum kits and other rock styled instrumentation and you desire more control over valve colour then the VMPQuadPlus may be suited to your needs.


About Manufacturer

Unique high-quality organic valve and class-A solid state studio equipment. No integrated circuits. Made in Australia.


  • Gain: 70db per channel
  • Frequency response: 20hz-110khz +/- 3db 'air' on
  • Mic input impedance: 1K ohm
  • Direct Input impedance: 1M ohm
  • Maximum input: +10dbu mic ,+16dbu direct
  • Maximum output level : +30dbu
  • Noise (EIN): -126db
  • Mains power input:~110/120 or ~220/240
  • Current : 0.8a ~220/240 or 1.6a ~110/120
  • Dimensions: 482mmX190mmX89mm (W-D-H)
  • Weight: Approx. 6kg.