Ampeg SGT-DI Blue Line Anniversary Edition

A "Blue Line" Edition in the Ampeg Spirit

The SGT-DI Blue Line Anniversary Edition features the same functions as the "silver" version but in an exclusive finish that evokes the aesthetic of the original 1969 SVT "Blue Line." Designed to capture the Ampeg DNA in pedal format, it combines a musical preamp, a DI ready to send to the front of house, and a modern IR section to preserve the "amp + cabinet" feel live.

This limited edition comes with the 75th Anniversary IR Pack (models SVT-610HLF, SVT-810AV, and SVT-15E), loadable via the free Ampeg IR Loader app.

Who It's For, Which Styles, and In What Contexts?

The SGT-DI is aimed at bassists seeking a reliable and consistent Ampeg signature sound everywhere: rehearsals, concerts (to the mixing console), home studios, or as the "heart" of a pedalboard. It suits fingerstyle and pick playing equally well and excels in rock, punk, metal, funk, and pop genres thanks to its effective EQ and SVT/B15 voicings.

In silent mode, the headphone output and cabinet simulation allow you to work on a refined sound without an amp while maintaining natural dynamics under your fingers.

Controls, Voicings, and IR Simulation: An All-in-One Pedal

The gain section is based on Super Grit Technology, with an SVT/B15 harmonization switch to tailor the character (attack, thickness, grit) to your instrument and style. The 3-band EQ is complemented by a sweepable mid circuit, ideal for placing the bass in the mix, along with 3-way Ultra-Hi and Ultra-Lo switches for quick sculpting of lows and brightness.

The IR section includes six preloaded impulse responses, with three user-rewritable slots. The Cab Level control lets you adjust and save the amount of cabinet in the signal, and the IR Off mode completely bypasses the simulation if you use a real cabinet or another solution.

Sound

The SGT-DI delivers a full and defined foundation with a response that remains expressive depending on your attack. Clean, it provides a solid, articulate preamp perfect for a "mix-ready" sound. When driven, the SGT adds an Ampeg-typical grit: rich harmonics, tight lows, and presence that cuts through without becoming harsh, especially when combining the EQ, Ultra switches, and IR section to recreate the feel of a real stack.

Technical specifications

Bass	+15/-12dB at 40Hz	Ultra Hi	Boosts high-frequency output level by 9dB at 8kHz
Mid	+/-14dB at selected frequency	Weight	0.85 kg
Treble	+/-20dB at 8kHz	External power supply	9V DC
Ultra Lo Boost	-10dB at 500Hz, +2dB at 40Hz	Consumption	500 mA
Ultra Lo Cut	-17dB at 40Hz	Polarity	center-negative