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Description
zvex pedals ZVEX Super Hard OnThis 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
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 ouput level can exceed 8 volts peak, and when it finally distorts, the wave is shaped like triode overload, not fuzz.It's so transparent no one will be able to tell you're using a pedal. Perfect for making the most of a classic amp and guitar, because it simply makes your guitar bigger and pushes the amp harder, causing natural overload. This sound can be the solution to the 'disappearing guitar' effect you get sometimes on stage when you stomp on your distortion and sound weaker. When cranked, it sounds much louder than a fuzz or distortion under stage conditions.
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.
WARNING: The very high input impedance of this pedal can cause strange reactions (sometimes mildly pleasant and/or arousing) when used with a vintage 'junk' (read 'cool') guitar. The solution is to simply lower the 'crackle okay' gain knob a little or leave the guitar volume wide open. Each Super Hard-On is unique in it's reaction... you may have to try a few till you find one that perfectly matches a really strange guitar. They are optimised for the major brands. Any problems will only occur at the highest gain settings with an unusual guitar.
The Super Hard-ON uses a very sensitive transistor, with some early versions mounted in a socket. During 2000, I installed a protection circuit to prolong the life of these transistors and I've seen no failures since. If you have a problem with an older unit, feel free to contact me, or you may purchase transistors inexpensively from 1-800-DIGIKEY where they are sold as part number BS170P-ND. You must follow proper static handling procedures to install the part... write to me for instructions at and i'll set you up. Newer SHO units have a diode protection circuit to keep the transistor from blowing. Please contact for information about updating your older SHO. To protect your SHO's transistor on older units, please turn the unit off before unplugging the cords. On SHO units produced during 2000 and beyond, the battery switching jack has been moved to the output jack closest to the front of the unit (closest to the J. Myrold signature). Please unplug from this jack to preserve battery life.
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4.2 ★★★★★
Based on 10 reviews
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Product Reviews
★★★★★ 5
Great, Large sturdy cabinet
Color: Black, Size: 23x29, Color: Black, Size: 23x29
I was looking to add more storage to my tint bathroom, and so a cabinet for over the toilet was my first plan of attack. This cabinet is large, has a semi open niche (protected from hella dust), and the doors match the style of my builders vanity, so i went with it.
Assembly:
It was VERY easy to assemble. Some things you get off amazon are a nightmare, this was thankfully pretty quick and sturdy. It came with all the hardware I needed, and the only assembly tool was a Philips Head screwdriver, and the different pieces were labeled well.
Mounting:
THE WALL ANCHORS INCLUDED ARE TRASH. Thank you for attending my TED talk. The cleat for mounting is about a foot long, so while i couldnt get it mounted in 2 studs, i mounted one side in a stud and used a toggle bolt for the other side. I would HIGHLY RECOMMEND using a toggle bolt for something this heavy, and having one end directly in a stud. The french cleat mount meant i could slide the cabinet a bit to center it above the toilet, but with some lifting. That isnt gonna move at all with everyday use. I also like that i can take it down and put it back up easily.
Smell:
I didnt notice any weird smells on mine, tho it did sit in my hallway for about a week before i got around to assembling it.
I used some stick and peel tile to dress up mine, and ill also add some hardware to make it look more bespoke, but overall im super thrilled with it. Would recommend.
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Reviewed in the United States on October 10, 2023
★★★★★ 4
Beautiful and Sturdy
Color: Texture Grey, Size: 25x30, Color: Texture Grey, Size: 25x30
The cabinet relatively high quality and sturdy. Assembly was not difficult, it took less than an hour, and the color is beautiful and exactly as pictured. The soft close doors are such a big bonus as I tend to accidentally slam doors shut so these doors are me-proof. It arrived in well insulated packaging, there were no missing parts, and the instructions were not difficult to decipher. However, I do have a few items that bothered me enough to deduct a star from the rating
1) The wall mounting system, has predrilled holes that are not the standard 16 inch apart per house's studs. The mounting hardware was subpar and we ended up procuring more sturdy mounting hardware. The cabinet is fairly heavy when it's empty so we wanted to ensure adequate support. The cost of the cabinet is higher than many others I looked and would have liked better mounting hardware - minus one star
2) I wish I had paid closer attention to the shelf heights as the clearance from the middle shelf to the top shelf when it's in the top shelf is in the highest position (top shelf is the only shelf that can be moved) was not tall enough to hold my large industrial size shampoo and conditioner bottles so storage was a little disappointing but I consider it my mistake for not measuring before purchasing - no rating deduction
3) We tried multiple configurations to try and get the doors to perfectly align and could not make it happen. Alignment was disappointing but again I am going to blame that on operator error - no rating deduction
Overall, it is a nice cabinet and works well and looks good. I would absolutely recommend.
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Reviewed in the United States on May 6, 2026
★★★★★ 5
Lovely cabinet but needs time to put together!
Color: White, Size: 23x29
The overall cabinet is what I was looking for. Very sturdy and good looking. The main problem my husband had was with the directions to put it together. The pictures were hard to see and the majority of written directions were hard to understand. Definitely took longer to put together than should have taken. But when it was completed and hung, I have to say I love it. Be prepared to have patience and enough time set aside to put it together.
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Reviewed in the United States on January 10, 2026
★★★★★ 5
Solid cabinet; all aligns well
Color: White-1927, Size: 19x27
Amazon declined my first buy/ship if this cabinet as it was damaged when it reached Amazon. That was fine, but I still had to go thru ‘return’ process of Amazons, w/o a product to return; so I used their ‘chat feature’ to explain—went smoothly, and they secured the replacement for me; I just need to check latest bill to be sure I was only charged once. OK, now onto the cabinet: Solid materials (for MDF-which I generally avoid), and assembled + installed in just 1hr. Btw, I add ‘glue’ the the provided 8 wood dowels used for assembly. The doors hinge adjustments are easy to align doors for final finish. While this cabinet ‘hangs’ on its cleat, I did add one screw to the inside-bottom of cabinet to ensure no one inadvertently may ‘lift’ the cabinet off its cleat. This is rock solid secured to me wall above toilet for great extra storage in the kids’ bath! Overall, a good buy; but did expect it to be cheaper price considering MDF material and made in China. I look for country of origin now and try to buy from US friendly countries. Good luck, Mark in NY.
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Reviewed in the United States on April 1, 2024
★★★★★ 5
Very impressive
Color: Navy Blue, Size: 23x29
I've had a lot of experience with modern furniture that you have to put together. Most of it, I worry about the durability of the product. Most is put together with repurposed particle board. So it's heavy and I would think not durable - especially in a damp environment.
Saying that, I was very impressed with this product.
My experience with the product to this point has been the best of those type of products. It shipped very well...everything in place and neatly packed. The engineered wood (resembles plastic) seems solid, water resistant at a minimum, and scratch resistant. The instructions provided - while the product was easy to assemble - were amongst the clearest I've seen from such a product.
What impressed me the most was the thought behind the design of this product. The hinges are perfect for the product. The doors can be easily removed by pushing a button on the hinge. The holes on the boards were perfectly drilled - so much so that I didn't have to pound any board to put them together. The back wasn't nailed on and the slot used for the backing was spot on.
If I had to choose negatives (and I'm really nit-picking because this is really designed that well) it was that the shelf ends up being a bit loose and I would have liked the mounting board to match the width of the slot it was being used to fill. Both can be fixed at the house by home products and screws.
I was so impressed that I would go and buy another product from this manufacturer (and look for the manufacturer by name). IT is that good.
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Reviewed in the United States on December 4, 2022
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