Ampeg Classic Analog Bass Preamp

An "Ampeg" Preamp in Pedal Format: The SVT and Portaflex DNA Within Reach of Your Pedalboard

Ampeg is one of the essential sonic signatures of electric bass: a solid low end, present mids, and that "mix-ready" quality that naturally cuts through a band. The Classic Analog Bass Preamp continues this tradition with a very straightforward approach: a familiar 3-band EQ enhanced by the famous Ultra-Hi and Ultra-Lo switches associated with Ampeg preamps. The result: you get an authentic tone, no menus, no digital conversion, with immediate ease of use.

Who Is the Classic Analog Bass Preamp For, and In What Contexts Does It Make a Difference?

This pedal is aimed at bassists who want to lay down a reliable and recognizable tonal foundation, whether you play through a neutral combo, a modern "hi-fi" head, or a backline amp that changes every night. It suits intermediate players (simple controls, predictable responses) as well as seasoned musicians seeking a quick-to-recall Ampeg signature on stage.

In terms of styles, it excels where the bass needs to hold the track: rock, pop, blues, funk, country, alternative... In the studio, it serves as a "voicing tool" to place the bass in the mix without wrestling with complex EQs. On a pedalboard, it can become your always-on preamp or, conversely, a character channel to activate as needed.

Features and Controls: Efficiency Above All

The Ampeg Classic Analog Bass Preamp gets straight to the point: a Volume knob to control output level and a Bass, Mid, Treble EQ to shape the foundation, attack, and presence. The Ultra-Hi and Ultra-Lo switches instantly add brightness and definition, or conversely weight and depth in the lows-handy for switching from fingerstyle to pick playing or adapting your tone to a resonant room.

The true bypass switching lets you recover your "raw" signal when the pedal is off, and the low noise analog circuit helps keep your rig clean, even with an effects chain. A nice touch: if your active bass outputs hot, the pedal can adapt thanks to an internal -15 dB pad (useful to avoid input clipping and maintain controlled dynamics).

Finally, its metal chassis is clearly designed to withstand the rigors of live use: transport, rehearsals, tight pedalboards, quick onstage changes.

The Sound

The Classic Analog Bass Preamp delivers an immediately recognizable Ampeg tone: firm lows, midrange presence that helps the bass "speak," and a structured sound that sits easily in a mix. The EQ remains musical: you can fix a dull room, add attack to cut through with a pick, or tame harsh highs without losing character. The Ultra-Hi and Ultra-Lo circuits are perfect for quickly switching between two tonal balances without turning your sound into something artificial.

It's a pedal that respects playing dynamics: the harder you play, the more the sound gains intention. It is used by stage bassists such as Jimbo Hart (Jason Isbell and the 400 Unit) to stabilize a sonic identity and maintain consistency from gig to gig.

Technical specifications

Type	bass preamp	Input	1 x 6.35mm Jack
Technology	analog	Output	1 x 6.35mm Jack
Bypass	true bypass	Dimensions (L x W x H)	11.4 x 6.6 x 5.6 cm
Chassis	metal	Weight	272 g
Potentiometers	Volume, Bass, Mid, Treble	Power adapter	9V DC (center negative) optional
Switches	Ultra-Hi, Ultra-Lo	Consumption	20 mA
Input pad	-15 dB (internal)	Battery power	1 x 9V battery (type 6LR61), not included