An SWR 550X 550-watt tube hybrid bass amp head. A great bargain for someone looking for big power at a small price. This amp has been cleaned and tested. It is fully functional and sounds great. Unit is Made in USA, pre-Fender era.

Sub Wave activator (octave down) pedal, original packaging, original manual is included. I am original owner of this amp, since 2007. Amp is in very good cosmetical condition, was stored in transport case, at rehersial room. Small scratch on the front panel (bisible at photo).

Manufacturer's description...

SWR's 550x bass amplifier debuts with extra power and extra lows from the newest member of the X Series. The SWR 550x takes the 350x's top-selling feature set to new heights - 550 watts @ 4 ohms - and new lows with the SWR Subwave octave generator. The 550x gives you world-famous SWR professional tone and power in a fan-cooled two-rack-space configuration.

Behind the 550x's ultra-high-polished aluminum front panel lives an all-tube preamp gain stage and one 12AX7 preamp tube. A power output of 550 watts at 4 Ohms and 375 watts at 8 Ohms (minimum impedance 4 Ohms) ensures your 550x will make the floors shake. And frequency response within 3dB from 20Hz-40kHz will capture every low and high harmonic. Rack mountable, with an aluminum chassis and chrome rack handles, the 550x gives you the most bass for the money!

Overview

-Power Output: 550 Watts into 8 ohms

-Tubes: 12AX7 (1)

-Controls: Gain, Aural Enhancer, Subwave Level, Bass, Mid Level, Mid Frequency, Treble, FX Blend, Master

-Exclusive Aural Enhancer circuitry

-Subwave Subharmonic Synthesizer

-Tuner Send

-Dimensions: 19" x 16" x 3.5"

-Weight: 26 lbs