Zvex Super Hard-On
Zvex Super Hard-On

Super Hard-On, Guitar/Bass booster from Zvex.

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All user reviews of 5/5 for the Zvex Super Hard-On

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Average Score:4.3( 4.3/5 based on 4 reviews )
 2 reviews50 %
 1 user review25 %
 1 user review25 %
Value For Money : Excellent
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iamqman's review

Zvex Super Hard-On
Very simple ad easy to use unit. If you think you have a weak sounding guitar and or weak sounding pickups then this might be the pedal for you. With only one knob and two outputs for different amps or a tuner out there really isn't much to think about. Just plug it in and listen how it reacts to your guitars output and boost the natural frequencies of your guitar and pickups.

* Hand-painted artwork
* Ultratransparent boost
* High-impedance input refuses current from your pickup
* Ultrahigh output
* Goes from unity gain to in excess of 8V peak


This is the perfect preamp pedal. The "Crackle Okay" volume knob is a negative-feedback control styled after classic 60's recording console inputs. (They crackled when adjusted too.)
Most vintage guitars suffer from steadily deteriorating magnets in their pickups, since permanent magnets aren't really forever. The Super Hard-On's input impedance is so high (5 Meg) that it refuses any current flow from your pickup... maintaining the most magnetic field around each string, so you can hear exactly what your pickup sounded like the day it came off the winder.
The output level can exceed 8 volts peak, and when it finally distorts, the wave is shaped like triode overload, not fuzz.

Like all Z. Vex designs, current flow is low in this circuit (less than 2mA), enhancing battery life. The circuit board is hand-cut and soldered with the critical component, a BS-170 mosfet transistor, placed in a socket for easy user replacement should it be necessary. Your dealer can provide you with a free replacement transistor upon request.

The box is hand-drilled using no petro lubricants, and hand painted so that every box is unique. Knobs are Harry Davies, made with the same molds they've used since the fifties. Each effect is hand dated and signed by Zachary Vex.


I love the clarity it can give you when you run the control knob around 9:00. It really gives a nice sweet volume and transparency. Turn the knob up to 12:00 and you will get a nice mild overdrive signal that works very well in front of an already overdriven amp. It is subtle but sounds great in front of a Marshall JCM 800. If you turn the control knob all the way up it gets a nice tubescreamer type overdrive which is mild and classic sounding. When it is maxed out it does get a little fuzz tones in there which is very cool and unique.


Like all Zvex pedals this is built quite well and will sound excellent through just about any source.

At new these unit come in at around $240 a piece. Not a bad price for a solid built and sounding booster pedal. And for what it does it does quite well. Some people might think why would someone pay for a one control knob unit that just increases the volume, but if you got the chance to plug this thing in you would immediately hear the reason why this pedal is fantastic.

I would recommend this pedal to anyone who needs a bit of a boost to their signal or feel that the pickups or guitar sounds a little weak. This will give you the clarity and gleaming tone that you find on mixed and mastering recordings.


Rolfpedalboards's review (This content has been automatically translated from French)

Zvex Super Hard-On
Booster Zvex made and hand painted. The object is beautiful. An input jack and 2 sortie.On can be used as booster 2 amps simultaneously.


One knob for volume boost when the amp turns your crack but easy to use normal.Plus I do not know if it is possible


When active this pedal and allowed the knob to zero does not change and does not color your sound is really clear. when it mounts the volume dirty, then it is finally crunch and a distortion. I use it is to boost some of my guitar and also to clean my mess.

Conclusion I believe that we can not do better as a booster


I've had two months. I really looked for a good transparent boost, Zvex has fait.Bon is a bit expensive but if you order it through the states it is honest. I think the quality is excellent which justifies in my opinion took a little higher.

Go to the site to see the video of the pedal. (Http://www.zvex.com/effects.html/) Also feel free to look at others. Zvex I feel that these will replace some of my pedals.

Conclusion I believe that we can not do better as a booster.