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Hagerman's Mini Pentode Tube-Powered Tubifier Buffer Pedal is an essential Tone Enhancer for all Digital and Solid-State Rigs

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2026-GPX-Hagerman-Tubifier-InOut-700.jpg

Boss and Strymon have for a long time included a JFET Input Stage to enhance the output of their digital pedals. The JFET warms up the signal and opens it up a little more - adding a touch more colour and texture. And Jim Hagerman’s Tubifier is a level and some above that. Similar concept but with vastly improved components and results.

 

The Tubifier relies on a single vintage NOS Raytheon 6088 Mini Pentode Tube, where it’s also seemingly assisted by an adjoining Schottky Diode. The combined effect of that circuit lends more warmth and openness yes - and more articulation - while adding compression too at higher levels. Adding a Tubifier to your Digital Rig is like hitting a ’Sound Better’ switch. It instantly enhances and elevates your signal profile - and brings back some of that analogue texture and feel. Depending on how your rig is configured it can massively thicken and enhance the overall and core tonality.

 

I personally would have preferred to have had a footswitch here - as it’s easier to A/B test this pedal that way - versus having to plug it into and out of the circuit. But of course it’s designed and intended as an always-on device - and hence no way to switch it off! Even for always-on pedals for me it’s preferable to have footswitches - for trouble-shooting and A/B Testing purposes in particular. But the no moving parts has the upside of better reliability and longevity!

 

It couldn’t be easier to deploy - with just its single Level control - which yes- does add a little to the noise floor as you crank it. While for my rig it sits perfectly at 10 o’c on that dial.

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By happenstance I had just taken delivery of a brand new (forthcoming!) digital multi-fx pedal - which is embargoed until the end of this month. So I very much had the perfect test case to put the Tubifier to work with.

 

And its impact was instant - it makes the multi-fx pedal sound more alive, more dynamic, vibrant, open and articulate. It is very much an immediately noticeable change - and yes it makes the rig sound better.

 

There is a fair amount of boost in the Tubifier if you crank that Level control - but that does also up the noise floor somewhat. As I mentioned - it sounds utterly perfect in my rig when set to 10 o'c.

 

And I dare say it makes the rest of the rig sound better too. That is already analogue warm and gooey as such - but the Tubifier does enhance the soundstage still further - with more articulation and dynamics. A little more spank and brightness too!

 

This is an obvious one really, and it's a wonder why someone hasn't done a pedal like this sooner - in this specific and exact form factor. 

 

As Jim says :

 

"TUBIFIER is an always-on vacuum tube buffer providing warmth and tonal enhancement, ideally positioned at the start of the pedal chain. It employs a vintage NOS Raytheon 6088 pentode originally designed for battery-powered hearing aids and portable radios. This pedal will give your solid-state or digital rig that vacuum tube feel, with compression and a fuller, thicker tone. Not only will TUBIFIER make your playing better, but it can drive 50 feet of guitar cable without any loss of treble. Works great on bass too!"

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The Tubifier size is a very handy 1590B enclosure and is currently on offer for just $99 from the Hagerman Webstore (normal price $129). Note that the Tubifiers are set to ship on the 10th of this Month - around a week from now.

 

If you run a digital rig - say a Quad Cortex or Helix, or even Anagram - then this Tubifier is pretty much a must-have. It is an instant satisfaction always-on device. And at this price point - a total no-brainer!

 

About a year ago Jim introduced the slightly large Hagerman Valve Pedal - with a valve protruding from the enclosure - but with 2 mini controls - a sort of a larger forerunner to this one. For me the Tubifier is more portable and robust - and should better fit in with the touring musician in particular.

 

You should probably order one right now!

2026-GPX-Hagerman-Tubifier-InOut-700.jpg

Demos

Stefan Karlsson
Posted by Stefan Karlsson
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