The Ampeg B-4R Solid State Amp Head is the most powerful amp in its class and it's loaded with the features you need to make today's music. Here's the long list: dependable solid-state circuitry, MOSFET power section, 3 bands of tone with Ultra Mids, 5-position style selector, 9-band graphic, texture tube emulation circuitry, series/parallel effects with blend control, defeatable optocoupler limiters, push button biamp/full range capability, stereo/mono bridge switch, internal 24dB/8va crossover with 100Hz to 1kHz variable point, high/low balance control, mute function, 15 amp circuit breaker, and power to spare.

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