The Schaffer Boost: Solo-X is the all-analog boost and equalization expansion circuit from the famed Schaffer-Vega Diversity System wireless used by David Gilmour, Angus Young, Eddie Van Halen, Joe Perry and an endless list of rock gods from the 70s and 80s. This unique boost faithfully reproduces the signature "Schaffer sound" associated with some of the best guitar tones ever produced.


BOOST knob controls our vintage boost circuit capable of generating a whopping +30db. This analog boost is perfect for making lead parts standout, adding fullness to the signal going into the front end of your amplifier, or pushing it into oblivion!

EQUALIZATION EXPANDER increases the far ends of the guitar's frequency spectrum to produce scooped clarity without sacrificing precious mids. The extended low end bumps crucial low-mid frequencies responsible for giving live instruments punch and making them stand out in the mix. The accentuated treble frequencies on the other end of the spectrum accentuate 2nd and 3rd order harmonies to produce the airy presence often associated with the "Schaffer Sound". (Note: On the Storm and TSR pedals this was the left-side knob, which they essentially maxed out on the Solo-X to provide the greatest amount of "secret sauce" and harmonic content).


  • 100% Analog Circuitry
  • Premium Grade PCB with Gold Plated Contacts
  • HeavyDuty True-Bypass Switch
  • Blue 'SuperBright' LED
  • Premium Grade Alpha Potentiometers
  • Neutrik Jacks
  • Power Requirements: 9/12vDC(-) Power Supply or 9v Battery (not included)
  • Enclosure Dimensions:4.69"Dx2.52"Wx1.57"H
  • Made in USA

Emphatic users of SoloDallas effects include legendary guitarists Keith Urban, John Mayer, Joe Perry, Keith Richards,Ron Wood,Steve Stevens, Doug Aldrich, Richard Fortus(GnR), Scott Metzger, Adam Jones, Chris Stein, Joe Bonamassa, Coco Montoya, Billie Joe Armstrong and Angus Young. SoloDallas loyalists also include bassists Pino Palladino, Sting, and Rudy Sarzo as well as keyboardist Derek Sherinian.

Product Specs

Brand New (New)
Brand New items are sold by an authorized dealer or original builder and include all original packaging.learn more
Brand SoloDallas
Model SoloX
Finish White
Categories Overdrive and Boost
Made In United States

UpFront was really positive to deal with. Fast shipping, and the guitar showed up packed securely and set up perfectly. The original pickups and electronics that had been swapped out were bagged and labeled. I would definitely buy again from them without reservation.

Jordan C. - March 28, 2020

Dave M. - March 28, 2020

Fast and easy transaction. Great price. Fast shipping. Would buy from them again.

Joseph S. - March 26, 2020

Michael Y. - March 26, 2020

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Shipping Policy

Available for local pickup from Franklin, MA, United States

Ships from Franklin, MA, United States to:

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Alaska, Hawaii, and international shipments will incur additional charges. Prior to payment for shipments to Alaska, Hawaii, and international destinations, please inquire for shipping cost and be advised that the buyer is responsible for all import duty fees and VAT taxes. Due to new CITES restrictions, ROSEWOOD products made after January 1, 2017 cannot be shipped outside of the USA.

Tax Policies

Taxes are charged in the following regions either by the seller, per their tax policy, or by Reverb as a Marketplace Facilitator:

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*Marketplace Facilitator State. Reverb collects tax on the sellers behalf. Learn More

Return Policy

Return Window

This product can be returned within 14 days of receipt.

General Terms

Items must be returned in original, as-shipped condition with all original packaging and no signs of use. Buyer assumes responsibility for all return shipping costs unless the item was not received as described.


Buyer receives a full refund in their original payment method less any shipping costs.

Special Conditions

Despite our best efforts to accurately describe and match our products to your needs, sometimes the "fit" just is not right. For those rare situations, our 14-day return policy begins from the date that you receive the product, whether in the store or online.

Our requirements are simple:
- Please return the product in like new condition, with all original packaging, tags, warranties, certificates and user information.
- The buyer is responsible for return shipping charges and must insure the product for the full purchased value. Any damage claims occurring during return transit are the responsibility of the buyer. Upon request I can send you a return UPS label so you get our shipping rate. I will deduct the shipping from the return. Credit will be issued once the item is received and inspected at Up Front Guitars.
- Please, if you are not sure you are crazy about your purchase, do not take it on a gig or loan it to your friends! If a product is returned with wear/damage to the extent that we cannot resell it as new, there will be a 25% restocking fee.

The address for return shipments is:
UpFront Guitars
430 Franklin Village Drive
PMB 183
Franklin, MA 02038

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UpFront Guitars LLC

Franklin, MA, United States
Joined: Oct 2013

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Solodallas The Schaffer Boost Solo-X LTD Edition Gloss White
+ $3.49 Shipping