DHA ValveTone VT1 EQ Bass Drive


  • Colour (toggle)
  • Bright (toggle)
  • Boost (toggle)
  • ? (toggle)
  • ?
  • Colour (toggle)
  • Bright (toggle)
  • Boost (toggle)
  • ? (toggle)
  • ?
  • ?
  • Boost
  • Level
  • Q
  • Head/P Line out
  • DI
  • Treble
  • Mid
  • Bass


Dave Hall Amps (DHA)

The VT1-EQ-Bass-Drive from DHA is a hand built valve Overdrive effects pedal which uses a 12AX7 (ECC83) preamp valve to provide true valve tone, the tone generated has to be heard to be believed! The VT1-EQ-Bass-Drive is suited to bass and keyboard players looking for subtle clean to crunch valve tone for blues and rock. This new model to our VT1 range has a 3 band active EQ with mid range Q plus an XLR balanced DI out.

Please check out our website for sound clips and forums such as basschat, harmony_central, talkbass and finnbass for reviews and comments.

Overdrive is achieved by using both gain stages in the 12AX7EH valve/tube to generate the classic valve pre-amp overdrive tone plus a clean op-amp boost is available for extra output volume. The valve is ran at 24V DC so valve soft clipping is generated at low levels of gain and this is amplified by the valve's second stage and the selectable op-amp to provide lots of overdrive volume. This is great with modern solid state amps and fantastic with valve amps. The VT1-EQ-Bass-Drive sounds great when plugged directly into a desk or a digital recording setup via the low noise XLR balanced DI output.

The Gain and Level controls let you select that tone you been looking for! And don't forget the volume and tone on your guitar which will react well with the VT1-EQ-Bass-Drive just like a real valve amp. There is a true By-Pass Foot Switch which is used to select the Overdrive and EQ part of the circuit but the DI remains on all the time. This means you can use the VT1-EQ-Bass-Drive to DI your other effects or just the bass with or without adding the VT1's valve warmth.

The 3 band active EQ provides +/- 15dB of cut and boost in each range plus the mid tone control has a Q control so you can adjust the sweet spot frequency.

There is a bright switch on this model which boosts the treble when selected without losing the bottom end. There is an i/p pad control which is useful when using active or high output pickups.

The tone is prue valve, fat and warm and completely different to silicon effects pedals which tend to fizz and compress the signal. Unlike silicon pedals you can use the volume control on your bass to control the amount of distortion you want, just turn it up for the solo.

There is a selectable boost function. This adds additional clean output volume to the valve signal using a low noise op-amp. This function is very usefull when very low levels of gain are required for clean but fat valve tones. The boost control allows the user to set the boost level.

The output of the VT1-EQ-Bass-Drive is connected to a standard 1/4" jack for use with an amp and an XLR balanced DI connector which is in parallel. This means both outputs can be connected at the same time, so the 1/4" might go to the amp for the stage backline and the DI to the PA or desk. The DI is also intended for studio recording as the pedal is really a valve/tube pre-amp so will add warmth to any set up. There is a DI ground lift switch which is useful if a ground loop hum occurs.

The VT1-EQ-Bass-Drive runs from a 9-12VDC 500mA (12VDC 1200mA recommended) supply via a standard 2.1mm socket, there is an internal switch mode power supply which generates the the 24V Plate voltage.

(A suitable PSU can be supplied at an additional cost of £15.99 if required, just add this to cost of your purchase. We post a UK version to buyers from the UK and a international version to international buyers. The international power supply has adaptors for operation anywhere in the World and works with mains from 110Vac - 240Vac)

The VT1-EQ-Bass-Drive is totally hand built using a quality PCB, even the box is hand painted and marked. There is a one year return to manufacturer guarantee which covers parts and labour in case of failure with each unit. There is also a user manual.

Most recent forum threads

Link to this page

Here's some code to post a link with image on forums, eBay, websites,...
BB Code
(sites, eBay,...)

Where to find one?

your browser doesn't support AJAX?

fx pedal stompbox stomp box guitar effects pedal overdrive over drive gain saturation distortion/fuzz/overdrive dirt grit amplifier amp amplification preamp pre-amp volume/amplification
Syndicate content

Subscribe to our newsletter

Also check out Effects Database's social media accounts: