tube beta hybrid Mk-II preamp


Available for order.

Made only to order. Manufacturing period 4-10 weeks.

It’s a hybrid pedal in a compact box size (187mm x 120mm x 38mm),with two channels: tube and "stone". The tube channel is based on Sunn’s  Model-T (1973), with two 12ax7EH tubes. The "stone" section has the preamp of the Sunn Beta amplifier (bass or lead, depending on the customer's choice).

Unlike the first version of the pedal, the channels aren’t switched successively but in parallel, as in our Beta Bass preamp. The new preamp only has one output and a balanced XLR DI out. We also offer  true bypass. 

Just like we did with model I of the Tube Beta Hybrid, we intend to produce two variants of the Beta channel: BASS or LEAD, depending on the customer's choice. Each channel has a classical set of regulators: gain, bass, mid, treble, level and master volume.


  • Channels quantity - 2 (tube, beta)
  • channel tube:
    • tube is based on the preamplifier of SUNN Model-T amp (1973)
    • passive EQ
    • separate output
  • channel beta:
    • beta is based on the preamplifier of SUNN beta  amp (bass or lead)
    • Active EQ
  • Separate adjustment on each channel
    • drive
    • bass
    • mid
    • treb
    • level
  • master volume
  • footswitch - t/b, t+b, bypass
  • U - 12VAC 1000mA (Power Supply not included)


The preamp only works with alternating voltage 12 wolt.

On the label of your power supply it should read:

Input - xxxVAC xxHz
output ~12VAC 1200mA

plug 5,5mm x 2,1mm center

If you use AC/DC power supply, the pream won't work.

NO DC !!! No +/- NO polarity

This item is sold As-Described

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ConditionBrand New (New)
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  • tube beta hybrid Mk-II
Made In
  • Russia


Nizhniy Novgorod, Russia
Joined Reverb:2013

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