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Despite having 50 years under its belt, class-D amplification has been enjoying a renewed interest among guitar- and bass-amp designers in recent years. Thanks to the technology, it’s possible to pack highly efficient amplifiers with high headroom and power into enclosures small enough to fit inside the smallest gig bags. It’s especially ideal for bass amps, which have traditionally required heavy custom transformers and high-powered circuits to process the quick transients needed for smooth and transparent bass tones at high volumes.

Peavey has shown a keen interest in class D since introducing the world’s first class-D live-audio power amp nearly 30 years ago, and their new MiniMEGA bass head shows that interest hasn’t waned since. The MiniMEGA marries a custom-designed class-D power section—tuned specifically for bass guitar—with a simple EQ set, smart interface, and several useful features for both gigging and recording.

The front panel on the 1,000-watt, 9-pound MiniMEGA is pretty straightforward. From left to right, there are controls for input gain, a built-in optical compressor with bypass switching, and a 4-band EQ with bass, treble, and semi-parametric low- and high-midrange controls. Following the EQ section is a dual-concentric control governing the sub-harmonic boosting provided by the amp’s Kosmos circuitry, a master-volume control, and a 1/8" headphone jack. A row of push buttons located underneath the dials engage functions such as a crunch mode, individual high- and low-end boosting, and a feature called “narrow Q” that narrows the bandwidth of the two midrange controls to tighten their focus.

The back panel houses two Speakon jacks, each rated at 4-ohms minimum. There’s a 1/8" auxiliary input for jamming along to recordings, a DI section with XLR and 1/4" outputs, and switches for pre/post EQ’ing, ground-pin lifting, and output-signal padding. Following the DI section, there’s an effects loop, tuner output, and MIDI jack for footswitching.

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