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Vertex Boost MKII Pedal

Out of stock

This product is on backorder, so you can buy it now and it will ship to you as soon it's re-stocked, or use the form below to receive an email when it's back in 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


From Vertex:

Features include

  • Boost pedal with +16dB of ultra-transparent level over unity gain
  • Drives your amp into saturation or gives your solos a squeaky-clean level bump
  • Accommodates both line- and instrument-level signals
  • Ultra-linear buffers condition your entire signal path, ensuring optimal input and stable output impedance
  • 1-megohm input buffer compensates for pickup loading
  • 100-ohm output buffer tackles arena-sized cable runs like a champ
  • Converts a noisy passive effects loop into a max-quality, whisper-quiet active loop
  • Insert jack enables volume adjustment via an external volume or expression pedal while keeping your guitar’s signal isolated and free of “tone suck”
  • 33% slimmer than its predecessor (Vertex Boost MKI)


Don’t let the Vertex Boost MKII’s name fool you — it’s much more than a mere boost. Make no mistake, this multifunction guitar pedal can function as a gain booster, with +16dB of ultra-transparent gain that can either drive your amp into saturation or give your solos a squeaky-clean level bump, depending on where you choose to deploy it. Able to accommodate both line- and instrument-level signals, the Boost MKII also includes ultra-linear input/output buffers that are guaranteed to elevate the sound of your entire rig. This stompbox’s buffers can propel a typical mid-level rig into pro-level territory with zero tonal coloration. And if your rig is already 99% of the way there, the Boost MKII will deliver that elusive missing 1%. Beyond that, the Boost MKII’s insert jack enables you to adjust your volume via an external treadle-style pedal while keeping your guitar’s signal completely isolated — it’s like plugging straight into your amp. Boasting a compact enclosure that’s 33% slimmer than its predecessor, the Vertex Boost MKII belongs on every tone-obsessed guitarist’s pedalboard.


While the Boost MKII offers a myriad of useful functions, it’s a clean booster pedal at heart. Its straightforward Level knob ranges from unity gain to a healthy +16dB. Placing the Boost MKII in front of your amp or dirt boxes adds saturation and sustain to your signal, while placing it after your preamp and dirt boxes gives you a full-range level increase. Best off all, the Boost MKII doesn’t change the tone of anything that comes before it — it’s sonically invisible.


Guitarists are always searching for new ways to elevate the sound of their rig. Thanks to its top-shelf input and output buffers, the Vertex Boost MKII will do just that. How can a set of buffers transform a noisy, novice-sounding rig into a quiet, pro-level one? For starters, these buffers condition your rig’s entire analog signal path, ensuring optimal input and stable output. They also exhibit an unprecedented level of linearity, while ensuring zero coloration of your signal — even with dozens of stompboxes in your chain. The Boost MKII’s input buffer compensates for pickups with different impedances, ensuring that both single-coil- and humbucker-equipped guitars retain every ounce of their tone, while its output buffer tackles arena-sized cable runs like a champ. Got a hissy, interference-prone passive effects loop? Not anymore — the Boost MKII will convert it into a max-quality, whisper-quiet active loop.


On the rear of the Boost MKII, you’ll find a 1/8-inch TRS insert. This enables you to control your volume using an external treadle-style pedal. When the Boost MKII is bypassed, your external pedal will behave as a typical volume pedal, sweeping from zero to unity gain. Turn the Boost MKII on, and the treadle-style pedal will sweep from zero to wherever the stompbox’s Level knob is set. You connect the treadle-style pedal to the Boost MKII via a 1/8-inch TRS to 1/4-inch TRS (stereo) cable or a 1/8-inch TRS to dual 1/4-inch TS (“Y” insert) cable (sold separately). Best of all, your guitar’s signal is completely isolated from the treadle-style pedal, ensuring zero impact on your tone.


  • BOSS FV-30H (accepts “Y” insert cable)
  • BOSS FV-30L (accepts “Y” insert cable)
  • BOSS FV-50L (accepts “Y” insert cable)
  • BOSS FV-50H (accepts “Y” insert cable)
  • BOSS FV-500H (accepts insert “Y” cable or TRS cable)
  • BOSS FV-500L (accepts insert “Y” cable or TRS cable)
  • Dunlop Volume X Pedal DVP8 (accepts “Y” insert cable or TRS cable)
  • Dunlop Volume X Pedal DVP4 (accepts “Y” insert cable or TRS cable)
  • Dunlop DVP1XL Volume Pedal (accepts “Y” insert cable)
  • Ernie Ball 25K Stereo Volume Pedal (accepts “Y” insert cable)
  • Ernie Ball 250K Mono Volume Pedal (accepts “Y” insert cable)
  • Ernie Ball VP JR 25K (accepts “Y” insert cable)
  • Ernie Ball VP JR 250K (accepts “Y” insert cable)
  • Korg EXP-2 Expression Pedal (accepts TRS cable)
  • Korg XVP20 Stereo Volume/Expression Pedal (accepts TRS cable or “Y” insert cable)
  • Lehle Mono or Stereo Volume Pedal (accepts “Y” insert cable)
  • M-Audio EX-P Expression Pedal (hardwired TRS cable included)
  • Moog EP-3 Universal Expression Pedal (accepts TRS cable)
  • Morley M2 Passive Volume Guitar Effects Pedal (accepts “Y” insert cable)
  • Morley M2 Passive Expression Guitar Effects Pedal (accepts TRS cable)
  • Roland EV-5 (hardwired TRS cable included)
  • Visual Sound Visual Volume Pedal (in passive mode — accepts insert “Y” cable)
  • Xotic XVP-250K High Impedance Volume Pedal Pedal (accepts insert “Y” cable)
  • Xotic XVP-25K Low Impedance Volume Pedal Pedal (accepts insert “Y” cable)
  • Yamaha FC-7 (hardwired TRS cable included)

Shipping & Returns

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*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.