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USED TWA Triskelion 3.0 Harmonic Energizer – Midrange Booster and Overdrive Pedal, Made in the USA

Out of stock

We're currently out of stock on this item but if you'd like to inquire about incoming stock, a special order or a custom build, use the form below to get in touch with one of our specialists, and we'll get you taken care of!
– Matt's Music Staff


This is a used pedal. The item pictured is the one you will receive. It has been tested and gone over by the experts at our shop to ensure it’s working properly and is free of issues, unless otherwise noted in this listing. Please see pictures provided and the notes below for condition and wear. It will be packed with care to be shipped to your door! If you have any questions about this or any other piece of gear we have, please let us know and we’ll be happy to help!

Condition Notes:

– Condition: 9.5/10

– Any wear of note: In overall amazing shape and full working order! Only includes the pedal, no box.

From TWA/Godlyke:

TK-03 Triskelion® Mk. III Harmonic Energizer®

The Triskelion® saga continues! (Or, third time’s the charm…)

To our knowledge, we were the first company to offer a production re-production of the marvelous & mysterious Systech Harmonic Energizer® used by the likes of Frank Zappa, Greg Lake, Joe Walsh and other 70’s icons.

Debuted at Winter NAMM in 2010, the Triskelion® elicited hushed whispers, envious glances, and more than a little head-scratching. It was also greeted by an e-mail from Dweezil Zappa, who ordered three of them for his touring rig.

Essentially a parametric midrange filter with adjustable peak and an obscene amount of gain, the Triskelion® reproduced all the searing, scorching, squawking sounds of the original Systech with pinpoint accuracy. It also has the added benefit of an extended high-frequency range & expression control over the filter sweep.

Never satisfied with – well, anything, really – we decided to shrink the “TRISK” down to a more pedalboard-friendly package while also adding some new features based on user suggestions.

During this overhaul, our engineer also took it upon himself to re-design the filter section of the circuit, reducing the noise level and allowing it to play much better with other dirt devices.

We released the Triskelion® Mk. II in 2015, and it’s developed a bit of a cult following with pedal peeps thanks to the hi-fi nature of its gnarly noise and a highly functional feature set.

However, admittedly there were some things that were lost in the transition between the Mk. I & Mk. II versions. So, after obsessing about these minor issues over the past five years, we finally threw down the glove and challenged our engineer to take the best aspects of both iterations and shrink the whole thing down into an even smaller footprint.

Challenge accepted & surmounted – Introducing Triskelion® Harmonic Energizer® Mk. III.

Now housed in a Hammond 1590B chassis, the Trisk-3 takes up even less real estate than its predecessors, yet it still packs all the processing power that those two crimson critters were famous for.

Back is the Variant Mass Boost switch of the original Triskelion®, which adds an ear-shattering upper range to its already peaky filter. Also back are the 30-odd Hertz of low frequencies that had mysteriously and inexplicably vanished during the creation of the Mk. II.

What’s not back is the higher noise level of the Mk. I – instead, the pro-audio quality noise floor of the Mk. II is in full effect, allowing the new version to function with surgical precision in a variety of high-gain settings without sounding like the Cosmic Microwave Background.

Speaking of Gain, the Triskelion’s can now be switched on/off via either a top-mounted mini-switch, or via an external footswitch connected to the side-mounted mini-phone jack.

A second mini-phone jack allows for connection of an Expression pedal to control the frequency sweep of the filter for wah-wah wiggles, dialing in feedback, etc. You can also connect the TWA Side Step® to this jack to turn the Triskelion into a tap-tempo LFO modulator of doom.

When is smaller better? When it’s the latest version of the Triskelion® Harmonic Energizer®

Shipping & Returns

Free Shipping

Most orders over $99.00 ship for free inside the lower 48 states. Certain items that are large and heavy do not qualify for free shipping.

We Ship Worldwide!

For information on International Shipping, please call, email or use live chat for rates. Orders shipping outside the Lower 48 States to Hawaii, Alaska, Puerto Rico and international orders do not qualify for free shipping. Orders shipping to U.S. Military APO/FPO addresses, PO Boxes, and US territories (Guam, Virgin Islands, etc.) can only ship USPS. NOTE: Boxes over 70 lbs each cannot be shipped to these locations.

As a security precaution, orders over $200.00 will only ship to the address your credit card company has on file for you.

*Korg and Mesa/Boogie products are only available for shipment within the USA.


We want you to be completely happy with your purchase, so we offer a 48 hour approval period on most purchases (see exclusions below). The 48 hour approval period begins when your purchased item is delivered to your door. If after 48 hours you’re not happy with the item, just contact us via phone, email or live chat on our website to arrange for a return authorization (RA#) and return shipping instructions. Any package sent back without prior authorization will be refused.

Returns must be shipped back to us within two days of the RA being issued. Items must come back to us undamaged and in the same condition they were shipped out. All manuals, paperwork, cables, tremolo arms, wrenches, etc… must be included or full credit will not be issued. Any items not conforming to this policy will be subject (at our discretion) to a restocking fee of 20% of the purchase price.

Refunds will be issued minus all related shipping expenses, if free shipping was initially given, the cost we incurred to get the item to you will be deducted from your refund. A 10% restock fee will also be deducted from your refund. Restock fees will be waived for full value exchanges.

Here are exceptions to our return policy.

  • Custom orders of any kind are non returnable and non refundable. We often charge a deposit before we will place a custom or special order. All special order deposits are NON REFUNDABLE, no exceptions.
  • Microphones, Harmonicas, In-Ear Systems and any other items that come into contact with your mouth or ears.
  • Items labeled as BLOWOUT, are non-returnable. These are often being sold below cost and are considered “all sales final”.
  • Software (this may also include hardware that includes software), unless still in shrink wrap with barcode affixed.
  • Guitar strings, blank media, and other disposable merchandise.
  • Guitar or bass pickups that have been installed or used in any way.
  • Any item advertised as “USED” is non returnable.

*Payments for music lessons are non refundable, no exceptions.

View our detailed Return Policy here.

Early Order Cancellation

All deposits are non refundable. Lots of our products are special orders and in many cases your order has to be built for you at the factory. This is what makes a lot of our products special. Once your order is started, it's being put together just for you. For this reason we ask that you don't cancel your order after you place it with us. If for some reason you absolutely have to cancel your order with us, we will assess you a 25% cancellation charge. This amount is equal to 25% of your total order amount. Ask us before you place your order to see if what you're purchasing is considered a special order.

Damaged Merchandise

Do not accept your shipment if the package shows any signs of external damage. After the item is returned to us we will ship you a replacement. If you receive incorrect or defective merchandise, please call 781-335-0700 within 5 days for a return authorization number.