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Distortion · Amptweaker

Amptweaker Big Rock Pro II

A rock distortion pedal with extensive control options and enhanced bass response. Accepts either 9V or 18V power for flexible operation.

  • 9-18V DC · center −
  • 50 mA
  • Mono
New
from $299
Used (asking)
from $189

The rundown

Highlights

  • Runs on 9V or 18V DC power
  • Large footprint at 164.3 x 134.4 mm
  • Analog circuitry with expanded low-end frequencies
  • Made in USA
  • Currently in production

Best for

Players seeking a full-featured distortion pedal with comprehensive controls and enhanced bass response for rock applications.

Quick facts

Power
9-18V DC
Current draw
50 mA
Polarity
Center negative
Dimensions
164.3 × 134.4 mm
Stereo
No
MIDI
No
Status
In production

Where to buy Amptweaker Big Rock Pro II

$299 lowest new price · Reverb

Used listings asking $189–$209, median $209 (5 listings). Asking prices, not sold prices.

Current offers
SellerConditionPriceLink
ReverbUsed$189View
ReverbUsed$209View
ReverbUsed$209View
ReverbUsed$209View
ReverbUsed$209View
ReverbNew$299View

Prices last checked 20 hours ago. Links to sellers are affiliate links.

Frequently asked questions

What power options does the Big Rock Pro II support?

The Big Rock Pro II accepts 9V or 18V DC power supplies with center-negative polarity.

Is the Big Rock Pro II a large pedal?

Yes, the Big Rock Pro II measures 164.3 x 134.4 mm, making it a large pedal.

Does the Big Rock Pro II have MIDI or stereo capabilities?

The Big Rock Pro II does not feature MIDI or stereo connectivity.

Similar pedals

Same type, similar features.

Specs from pedalfilter. Summary written by PedalBro from those specs and public descriptions.

Page last updated September 29, 2026.