The B-52 US-4000 amplifier is not selling at Retrevo any longer.
Customers who are shopping for a amplifier today are looking at the following popular models.
Pyle PEXA5000 Amplifier - 2500 W RMS - 2 Channel (5000 W PMPO - 10 Hz to 50 kHz)
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Fishman Pro-EQ Platinum Bass Preamp/EQ/D.I.: Guitar Pedals & Effects
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Marathon DJ DJ-2000 Amplifier - 250 W RMS - 2 Channel (2000 W PMPO - 20 Hz to 20 kHz)
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Behringer EuroPower EP2000 Amplifier
nullprice from $249.99