The Underground Accelerator is the successor to both Particle Accelerator and London Underground.

Neither were perfect, but both had strengths that the other didn’t so, Underground Accelerator takes the best of both into one glorious preamp. It follows the same general structure of the London Underground, letting it get a little more grit than Particle Accelerator, but still keeping the deep low end that London Underground lacked.

It sounds great as a clean boost or mild overdrive on guitar, but bass is where it really sings, providing the rich bottom end missing in so many bass pedals.

*The newest version of the Underground Accelerator has an EQ bypass switch. Note that the main purpose of the EQ Bypass is to boost the gain of the pedal, and bypassing the EQ will produce approximately +30dB more gain. Passive EQs like the one used in Underground Accelerator are inherently lossy, so the bypass was added for those that want more gain and don’t need the use of the EQ. If you simply want a flat response without the gain boost, you can set Treble and Bass to minimum and Mids to maximum.

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Undeground Accelerator

Sushi Box FX is thrilled to release the “With Bass In Mind” special edition Finally v2 in cooperation with award-winning music educator, journalist, author and session musician Philip Mann. Described as “one of my top five instructors on the planet” by Jeff Berlin, Philip’s performance credits include Grammy Award winners, Grammy nominees, and Rock & Roll Hall of Fame Inductees, as well as a formidable list of other award-winning and notable artists. Philip is a seasoned columnist for Bass Player Magazine with over one-hundred publications, contributor to scottsbasslessons.com and recognized scholar of The Players School of Music.

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Finally V.2 WBIM Edition

Dreamcatcher is a two-channel preamp designed to be the perfect flexible option for both bass and guitar. The clean (blue) channel is based on the Underground Accelerator, an excellent warm clean tone that can be pushed to get a little bit of drive. The drive channel (red) is a completely new design, and is capable of going everywhere from moderate crunch to full-blown distortion and everything in between. Each channel has an independent set of controls for flexibility and channel status LEDs so you know which channel is active even when the pedal is bypassed.

Demo by Pair of Pandas

Demo by Keith Camplin

Dreamcatcher

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Demo by Chris Hasty

Review by Talk Bass

Nobelium

The Slampegg Bee Pre is based on the preamp of the legendary Ampeg B-15N. In order to keep it compact, a 12AX7 was used like in the modern B-15, rather than the bulky 6SL7 of the older units. This allows Slampegg to get a little bit more drive than it’s 6SL7 counterparts, but the main circuit is the same, so you’re not missing any of the gritty warmth and luscious low-end that bassists have come to expect from the B-15. Aside from the standard Baxandall/James wo-band tonestack, Slampegg Bee Pre also has Ultra-Lo and Ultra-Hi switches, which act as a high-cut and hi-boost respectively. The Ultra-lo is much more prominent and results in a strong rolloff of high content to emphasize the fat lows and low-mids

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