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Drive · AMT

AMT GR-4

The AMT GR-4 is a four-channel preamp pedal featuring clean, crunch, overdrive, and high-gain tones in a single unit. It offers MIDI control capability for program switching and editing.

  • 12V DC · center −
  • 250 mA
  • Mono
  • MIDI
New
from $303
Used (asking)
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The rundown

Highlights

  • Four distinct preamp channels for different gain ranges
  • MIDI compatibility for integration with foot controllers
  • Requires 12V DC power supply with 250 mA current draw
  • Four footswitches for channel selection and control
  • Large pedal format at 261.6 x 116.8 mm

Best for

Guitarists seeking a compact preamp solution with multiple gain stages and MIDI connectivity for live performance or studio use.

Quick facts

Power
12V DC
Current draw
250 mA
Polarity
Center negative
Dimensions
261.6 × 116.8 mm
Controls
4 Footswitches
Stereo
No
MIDI
Yes
Status
In production

Where to buy AMT GR-4

$303 lowest new price · Reverb

Current offers
SellerConditionPriceLink
ReverbNew$303View

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

Frequently asked questions

What power supply does the AMT GR-4 need?

The AMT GR-4 requires a 12V DC power supply with a center-negative connector and 250 mA current capacity.

Can the AMT GR-4 be controlled via MIDI?

Yes, the AMT GR-4 features MIDI connectivity for remote program switching and parameter control.

How many footswitches does the AMT GR-4 have?

The AMT GR-4 has four footswitches for controlling its channels and functions.

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.