Ampeg SCR-DI BASS SCRAMBLER DI

From Portaflex Warmth to SVT Grit: Ampeg DNA in a Pedal Format

The SCR-DI was designed as an Ampeg "channel strip" to place on the floor: it features a preamp architecture and EQ with a distinctive character, capable of delivering a smooth tone inspired by the Portaflex (B-15 spirit) up to a more aggressive attack reminiscent of the golden era SVT series. To complement this range, Ampeg adds the Scrambler circuit, a saturation designed to evoke the feel of a pushed SVT, with a blend of grit, presence, and natural compression that helps the bass cut through a dense mix.

For Which Bassist and In What Contexts?

The SCR-DI is aimed at bassists who want a consistent sound everywhere, even when the backline amp changes from gig to gig. In live settings, its XLR DI allows sending a clean, controlled signal to the front of house, while retaining a 6.35mm Jack output to drive an amp or effects chain. In the studio, it's a quick solution to record bass with a credible Ampeg signature, then fine-tune the frequency balance via EQ. At home, the headphone output and auxiliary input turn the pedal into a silent practice tool, convenient for working with a metronome or songs.

Style-wise, it naturally covers rock, punk, stoner, metal, and modern pop (where the bass needs to remain solid and clear), but can also be very musical in soul, funk, or blues when the Scrambler is used sparingly and right-hand dynamics are employed.

Controls and Connectivity: A "Swiss Army Knife" Pedal Designed for the Field

The preamp section offers a global Volume and a 3-band EQ (Bass, Mid, Treble), complemented by two instant voicings Ultra-Hi and Ultra-Lo: ideal for brightening a bass that lacks air, or conversely thickening the low end without upsetting the overall balance. The Scrambler circuit is controlled via Drive (amount of saturation) and Blend (mix of saturated and clean signals), a very effective approach to maintain the foundation and attack, even with a decidedly aggressive tone. Finally, the connectivity is designed for real-world situations: dedicated balanced XLR output with ground lift, 6.35mm Jack outputs (Out and Thru), plus a headphone output and an auxiliary input for playing along with playback.

Sound Character

The SCR-DI's character is clearly Ampeg: a firm low end, mids that help the note "speak" (without becoming nasal), and a high spectrum capable of being either smooth or more cutting depending on Ultra-Hi/Ultra-Lo and EQ settings. The Scrambler adds saturation that doesn't overpower everything: with the Blend control, you keep the clean foundation while adding harmonic grit that makes the bass stand out in a guitar-driven band. This sonic identity has attracted bassists with distinct styles: for example, the SCR-DI is found in rigs used by Tim Commerford and Al Cisneros, proving the pedal can go from massive, modern tones to rougher, more organic textures.

Technical specifications

Technology	analog	Thru output	6.35mm Jack (unprocessed signal)
EQ	3 bands (Bass, Mid, Treble)	Balanced line output	XLR with ground lift
Voicings	Ultra-Hi, Ultra-Lo	Headphone output	3.5mm mini-jack
Overdrive	Scrambler with Drive and Blend controls	Auxiliary input	3.5mm mini-jack and 6.35mm Jack
Signal-to-noise ratio (20 Hz to 20 kHz)	90 dB	Dimensions (H x W x D)	56 x 193 x 110 mm
Maximum gain	24 dB	Weight	1.2 kg
Instrument input	6.35mm Jack	Power supply	9V battery (not included) or 9V to 12V DC power adapter (not included)
Output	6.35mm Jack (processed signal)	Current consumption	100 mA