The Greer Amps Sonic Boom is a clean boost pedal, described by the maker as "a fat, glassy clean boost." Its job on a board is simple: push the front of an amp or another pedal harder, or lift a quiet guitar in the mix, without changing the basic character of the tone. Greer describes it as the pedal to reach for "if you're looking to fatten that tone and give it some of that glassy roundness," and notes that "it stacks in" to drives, meaning it can sit before an overdrive or distortion pedal to push it harder.1
Where it came from
The Sonic Boom dates back to 1999. Greer Amps tells the story on the product page: a vintage booster from back in the day happened upon Nick's desk for repair, and after a very minor tweak or two, the Sonic Boom was the result. The current Sonic Boom 23 edition is a reissue, built in short run batches when the maker can sling them out.1
The Sonic Boom is currently built to order and ships within 1 to 2 weeks of purchase, according to Greer Amps. It is not a stock-and-ship product, so ordering ahead matters if it is needed for a gig date.1
Controls, power and finish
The pedal keeps things minimal. Greer Amps lists a true bypass footswitch, a blue LED indicator, and a 9 volt power supply. The current edition wears a sparkle blue finish, which the maker shows off on the product page.1
| Feature | Detail |
|---|---|
| Effect type | Clean boost1 |
| Footswitch | True bypass1 |
| Indicator | Blue LED1 |
| Power | 9 volt power supply1 |
| Finish | Sparkle blue1 |
Price and availability
The Sonic Boom 23 edition is listed at £129.00 GBP on the Greer Amps product page as of 25 October 2026. The price is given in British pounds by the maker; no US dollar figure is listed.1
Related Greer boost pedals
Greer Amps makes several other boost-adjacent pedals that appear on this site, including the Special Request, the Sure Shot Clipping Boost and the Pork N Beans Boost. For the wider category, see the Boost Pedals page.
Videos
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Questions
Is the Greer Amps Sonic Boom true bypass?
Yes. Greer Amps specifies a true bypass footswitch on the Sonic Boom, along with a blue LED indicator. True bypass means the pedal's circuit is removed from the signal path entirely when it is switched off, so your guitar's signal passes through unaffected until you engage the boost.
What power supply does the Sonic Boom use?
The Sonic Boom runs off a 9 volt power supply, according to Greer Amps. The maker does not list a current draw or battery option on the product page, so a standard 9 volt DC supply is what to plan for when laying out a pedalboard.
What vintage booster is the Sonic Boom based on?
Greer Amps says the Sonic Boom came about when a vintage booster from back in the day arrived at Nick's desk for repair, and after a very minor tweak or two the Sonic Boom was the result. The maker does not name the specific vintage unit on the product page.
How long does a Sonic Boom take to ship?
The Sonic Boom is currently built to order and ships within 1 to 2 weeks of purchase, according to Greer Amps. The pedals are built in short run batches when the maker can get them out, so availability can vary.
Does the Sonic Boom work well with overdrive pedals?
Greer Amps describes the Sonic Boom as a clean boost that stacks into drives well, meaning it can be placed before an overdrive or distortion pedal to push it harder and fatten the tone. The maker suggests it is the ticket for adding glassy roundness to your sound.
What color is the Sonic Boom?
The current Sonic Boom 23 edition has a sparkle blue finish, which Greer Amps highlights on its product page alongside the blue LED indicator.
Sources (1)
- Sonic Boom, Greer Amps
