EDB-2 VAP Valve (Tube) 2-channel Preamplifier

(1 review) Write a Review

We ship worldwide! (Read this)

Free Shipping:
To All 50 US States
  • Headway EDB-2 VAP Valve 2-channel preamp - main image, overhead
  • Headway EDB-2 VAP Valve 2-channel preamp - closeup of controls
  • Headway EDB-2 VAP Valve 2-channel preamp - bottom, inputs
  • Headway EDB-2 VAP Valve 2-channel preamp - top, outputs
  • Headway EDB-2 VAP Valve 2-channel preamp - 3 quarter view
  • Headway EDB-2 VAP Valve 2-channel preamp - bottom
  • Headway EDB-2 VAP Valve 2-channel preamp - alt main image
  • Headway EDB-2 VAP Valve 2-channel preamp - alt  view
  • Headway EDB-2 VAP Valve 2-channel preamp - front page of manual
  • Headway EDB-2 VAP Valve 2-channel preamp - feature views (illustration)
  • Headway EDB-2 VAP Valve 2-channel preamp - feature views (illustration)
Our Low Price: $649.00

Price shown may adjust with options selected below (if applicable)


A new TUBE-based version of the EDB-2 Preamp!

This new version of the EDB-2 preamp from Headway brings even more options to the table. You can blend TWO XLR mics with phantom power, blend pickups, multi-pickup units, and more. The new signal path includes a valve (that's "tube" for us on this side of the pond) to provide warmth, depth and desireable coloration. Rotary controls on the high pass filters allow for better control of low end infrasonics and "boom." Impedance switching to best match a particular pickup or transducer. There are two XLR D.I Outs and one Line Out (TRS). This box is a tone-tweaker's dream.

The EDB-2 VAP Valve Alchemy Pro Preamp is powered by a PSU or Battery backup, with two XLR In's (stereo) with 48v phantom on each channel, XLR Outs on each Channel (for splitting or blended options, plus Pre/Post EQ switching), a valve (tube) that is blendable for both channels or to be doubled on Ch.1 as "Rich Harmonics", plus the High Harmonics pot from H.E.A.T., (Harmonically Enhanced Analogue Tech) as found on the EDB-2 H.E.

It's a considerably larger Aluminium housing but with all the other features on EDB-2 H.E. It even features a USB Charger! It kills piezo quack, adds warmth, adds top end to magnetic pickups or dynamic mic's they cannot themselves produce and can separate strings audibly. Channel 2 has an Insert Point added for Send & Return.

The unit is supplied with:

  • Low Noise PSU (Lithium PP3 batteries needed for Battery Backup are not included - will not power valve )
  • Crossbody Carry Bag in Imitation Leather with extra compartment and Headway logo

Includes our exclusive Gollihur Music tipsheet to get the most out of your purchase

It's kind of hard to get into the totality of all that this box can do without having your eyes glaze over, but I'll try...
As I mentioned above, it has an appropriate input with phantom power, so it can run most any condenser mics (the DPA 4099B mic works very well). You can blend that with a piezo-electric OR magnetic pickup plugged into channel 1; so, a Realist, a Bass Max, a Full Circle, a Headway Band, a Krivo - even the Ehrlund EAP (I have heard from several people who have used the Headway in place of the OEM preamp from Ehrlund.)

Or, you could blend two pickups; so if you want to blend a Realist and a Krivo, or a Bass Max and a BP-100, or... well, you get the idea.

Or, you can use this preamp in place of one of the K&K Systems - like the Bass Master Rockabilly or the Bass Master Pro - because the channel-2 1/4" input can accept a TRS (stereo) input cable and split out the two channels for you to blend as you see fit. We have also confirmed through testing that it works perfectly to replace the preamp in the Golden Trinity Microphone series, so it is an excellent upgrade to those mic/pickup setups. So it replaces the pocket preamp included with those systems (and we even sell the transducer networks separately, if you want to assemble a custom system - just ask!)

It has an effects loop on channel 1; this could be handy when using for rockabilly - put a little slap-back reverb on your "clicky" pickup without muddying up the main bass tone. Or, perhaps put a compressor or other effect on one of your inputs. (Loop is only available to channel 1 and cannot be assigned to channel 2).

You can even use it for jamming along with tunes at home - it has a 1/8" auxillary input that you can use for i-devices, MP3 players, and the like. Cool!

The preamp has a 1/4" output for sending to your stage amp, as well as a DI output (for sending to the house soundboard/PA) on a standard XLR with a ground lift. There are separate gain controls for each channel, and a master volume (with a mute switch for each channel so you could even use the same preamp to swap between instruments).

The semi-parametric, fixed-depth (-12dB) notch filter allows you to "dial in" problem frequencies that are causing feedback or wolf tones, and notch them out with a very thin frequency cut; you can adjust that frequency, as well as the "Q" (which is how wide a swath you're cutting) to kill feedback with surgical precision. It can be applied to one of the two channels (you'd usually use it on the mic channel when using a mic.)

There is a NEW five-band interactive Baxandall EQ (Bass, Low Mid, High Mid, Presence, Treble) for each channel (the old model only had one EQ.) The controls can boost or cut, and have clear "detents" at their midpoints to indicate the flat setting.

You can flip the phase of either channel 1 or channel 2 (or neither) to improve tone, correct phasing issues, or fight feedback.

Each channel on the preamp has a "range" switch - most of my customers will set it to "Bass," I would think - to optimize the tone and response for your instrument; it applies a low-cut filter based on the instrument used, in order to remove the rumble and noise of subsonics.

The preamp can be powered by the included power supply or two 9V lithium batteries (not included, and they will not power the tube).

The case for the unit was thoughtfully designed with a pre-threaded mounting hole on the bottom - you can screw it right onto a standard mic stand for easy access!

The EDB-2 boasts Refined Class "A" Inputs and Pro Audio IC Components, easy to read Pro-Audio design layout and sturdy metal housings built to withstand "Life on the Road."

It also features their harmonic enhancer. This thing is a real Swiss Army Knife!


  • H.E.A.T (Harmonic Enhanced Analogue Technology) with Tuneable added High Harmonics
  • 12AX7 tube for variable warmth, coloration, and high harmonics enhancements
  • Twin Channels with two sets of 5 Band Interactive EQ & two Silent Mutes
  • 48v & 10v Phantom Power To Jack & XLR  -Mono & Stereo Inputs
  • Class “A” Inputs & top Pro Audio Circuit – Producing excellent Low Noise Gain
  • Send & Return FX Loop on each channel (TRS on Ch2, separate jacks on Ch1)
  • Mono, Stereo or Blended Outputs via Jack & XLR
  • Tuneable Notch Filter to beat feedback & resonances
  • 2 Way Phase Reverse & Earth (Ground) Lift Switches
  • Rotary range control (HPF) for wide variety of instruments for each channel
  • USA-Spec Power Supply included
  • Built-in Mic Stand Mount
  • Highly Comprehensive Manual (see tab, above)
  • Sturdier, Lightweight, Super Compact Construction in Aluminium Alloy & Long Life Heavy Feel Controls that stay put. Designed in UK – Made in Poland


  • Aluminum Box length = 215mm x 140mm x 49mm (8.47") x (5.51") x (1.92")
  • Overall length with connectors = 225mm (8.85")
  • Overall width = 145mm (5.70")
  • Depth of aluminum enclosure = 49mm (1.92")
  • Depth including knobs and feet = 64mm (2.51") Weight without batteries = 940g (33.16 oz)
  • Weight with batteries = 1040g (36.68 oz)
  • Weight of retail packaging for shipping complete with EDB-2 VAP = 1540g (54.32oz)
  • Dimensions of retail packaging complete with EDB-2 VAP = 268mm x 235mm x 105mm (10.55" x 9.25" x 4.13")
  • Microphone stand bracket connector: Female threaded bush on rear at 9/16” to 19/32" (15mm approx.).
View AllClose

1 Review

  • 5

    So good it seems like magic

    Posted by Rick Wolff on Sep 17th 2023

    I recently got the new EDB-2 VAP. I already knew of 'most' of the features since they are similar to my EDB-2 HE (the previous version). What's new is the Valve (or Tube as we call it). This is supposed to get rid of 'Piezo Quack' and really warm up the tone of your piezo pickup. I did a simple A/B test into my 2 channel Genzler Acoustic Pro with Both Channels set the same (just a little cut of the low-mids which I usually do). The Pre-amp was set TOTALLY FLAT. The proof is in the pudding and honestly, I was shocked at the dramatic difference in tone quality. Judge for yourself, here is a little clip:

View AllClose