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After introducing the popular TightMetal Pro™ distortion pedal in 2013, Amptweaker™ immediately received many requests for a two button Rock distortion. With its included Fat and Smooth switches, the BigRock Pro™ can get all the familiar tones from our popular TightRock and FatRock pedals, and many more. Unlike most distortion pedals with boost, the BigRock Pro includes 2 Boost knobs, one before and one after the distortion.....so it’s easy to boost the gain AND volume, for the perfect solo tone.

Dual Lit Boost controls via Boost footswitch
3 Band EQ, w/ Smooth Edge sw. and PlexEQ sw.
3 effects loops....Universal, Boost with Pre/Post switches, and the SideTrak loop that works when the pedal is OFF! Patch in clean effects
Gain, Tight & Volume Controls
High Gain switch for heavier tones, off for more vintage blues rock tones
Noise Gate switch, with internal adjustment, tracks gain
Added adjustable internal input noise gate for even more gating
Mid switch with PlexEQ setting
Mid Boost switch tweaks Boost to punch through
Internal Fat switches for warmer Rhythm and/or Boost tones
Can be used as a preamp, or into a clean channel
LED lit knobs when using a power supply
Battery disconnect switch with red indicator
Runs on 9V-18V batteries or supplies–like 'variacing' your amp up and down, or similar to 50W versus 100W tone
Current: 18mA with 1 or 2-9V batteries, 22mA with 9V adapter, 24mA with 18V adapter(adapters add knob LEDs....internal switch disconnects 1-9V battery clip
DC Adapter jack, standard 2.1mm X 5.5mm, center ground(-)
Magnetic Battery access door opens w/o tools
Weight: 3 pounds, Dimensions: 5.625"W X 5"D X 2.125"H
Handmade in the USA


We are the official NZ Dealer for AmpTweaker. We are a registered company and can provide GST invoices if required. Buyers are covered by our 12 month return-to-base warranty. We ship nationwide. If you would prefer to pick up from our Symonds St shop, you're more than welcome.

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  • Seller location: North Shore, Auckland, NZ

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