The SGT-DI™ Preamp and DI gives modern bassists a complete rig in a single pedal. It features an enhanced Super Grit Technology™ overdrive circuit with iconic Ampeg SVT® and B15 voices, a versatile 3-band EQ now with sweepable Mid circuit, 3-way Ultra-Hi and Ultra-Lo switches, a variable compressor, and an Aux/Headphone section. Plus! Introducing Ampeg’s first IR Loader/Cab Simulator. Choose from three classic factory cabs or up to three of your own using the free Ampeg IR Loader app.

3-band EQ with sweepable Mid circuit

SGT circuit with SVT and B15 voice switch

Built-in IR Loader/Cab Simulator

3-way Ultra-Hi and Ultra-Lo switches

10:1 variable compressor

What is an impulse response and why should I care?

A speaker impulse response or “IR” is essentially a digital audio snapshot of a speaker cabinet that captures the acoustic characteristics of that specific speaker, as well as the signal chain used to record it (microphone(s), preamp(s), cable, etc.) and the room in which it was recorded. IRs allow you to “virtually” switch between different cabinet sounds in the same way you would swap out physical cabinets.

SGT-DI is the first Ampeg hardware product to feature IRs and IR loading.

SGT-DI comes with six preloaded Ampeg factory cabinet IRs, three of which can be replaced with your own:

Cab mode includes the Ampeg Heritage B-15, Heritage SVT-410HLF, and SVT-810 Squareback IRs.

User Mode includes the Ampeg SVT-112AV, SVT-210AV, and SVT-212AV rewritable IRs

The Booth Level control allows you to adjust and record the amount of booth IR sound in your signal.

The IR Off mode bypasses the IR circuitry completely.