ABRAMS100 — 100W Compact Neutral Power Amp Head

🚚 FAST & FREE SHIPPING from Phoenix, AZ! Professor Nigel’s is an authorized Electro-Harmonix dealer.

Professor’s Notes
The ABRAMS100 isn’t trying to be an amp with a personality — it’s power with intent. Think of it as a compact, neutral endpoint for players whose tone already lives on the pedalboard or in a modeler. If you want your preamp or modeler to be the amp, this is a clean, powerful, lightweight way to make that decision stick.

Description
The Electro-Harmonix ABRAMS100 is a 100-watt, ultra-compact solid-state amplifier head designed for players who already know where their tone comes from. Built around a high-headroom Class-D power section, it delivers clean, reliable amplification without imposing a strong sonic fingerprint of its own — making it especially well suited for pedal preamps, amp-in-a-box pedals, and modeling rigs driving a traditional guitar cabinet.

The control set is intentionally straightforward: Gain, Bass, Mid, Treble, Reverb, and Master Volume, plus a Bright switch for light corrective shaping when needed. The onboard digital spring reverb adds subtle ambience, while the series FX loop allows time-based effects or external processors to be placed after the preamp. The FX loop return can also be used as a direct power-amp input, bypassing the preamp entirely for modeler or external preamp use.

We find the ABRAMS100 works best when treated as power, not personality — a practical, highly portable way to turn a pedalboard or modeler into a real-cabinet rig without stacking amp voicings. It’s not designed to replace a character amp; it’s designed to stay out of the way.

Professor’s Tips

• Let the pedal be the amp. Preamp-style pedals (such as D-style or amp-in-a-box designs) work best placed at the end of your pedalboard, feeding the ABRAMS100 as the final tone-shaping stage.
• Use the FX return for true neutrality. Running a modeler or dedicated preamp into the FX loop return bypasses the ABRAMS100’s preamp entirely, turning it into a clean power amp for driving a real cabinet.
• Think corrective EQ, not flavor. Start with the ABRAMS100’s EQ set flat, then make small adjustments only to compensate for the room, cabinet, or guitar — the character should come from upstream.
• Avoid stacking amp personalities. The ABRAMS100 shines when paired with pedals or modelers that already define the sound; if you’re looking for an amp to add its own voice, a voiced amp may make more sense.
• Cab choice still matters. Because the ABRAMS100 stays neutral, the speaker cabinet becomes a major part of the final sound — treat it as part of the instrument, not an accessory.

Specifications

• 100 watts output via Class-D power amp
• Ultra-light chassis — approx. 2.5 lbs (1.13 kg)
• Solid-state preamp with high clean headroom
• 3-band EQ (Bass, Mid, Treble) + Bright switch
• Built-in digital spring reverb
• Series FX loop; return doubles as power-amp input
• Output impedance: 4–16 Ω
• Dimensions (unboxed): 8.5" × 7.5" × 2.5"
• Powered by included 9VDC adapter