SWR SM-500, The original kick ass, high fidelity, high power bass amp. Excellent condition, Pre-Fender buy out production.
Propoganda pulled from an SWR dealer:
This advanced head features stereo or mono operation (250 watts per side or 500W mono at 4 ohms), precision 4-band paragraphic EQ plus Bass, Treble, and Transparency controls (all EQ is +/-15dB cut/boost). Paragraphic EQ provides frequency sweep knobs and a level slider for each band. The SM500 has a tube preamp, an adjustable Limiter, SWR's famous Aural Enhancer, a sidechain Effects Loop with Blend control, Speakon and 1/4" outputs, and an XLR Direct Out with switching for Line/Direct mode. All this power, versatility, and tone from an amp only 20 lbs. in weight.
This is a serious professional amp, the best bass head SWR ever built (IMHO). Only selling b/c I'm lovin' the Mark Bass LMtube I got from DavidJBass
Asking $475 shipped in the lower 48 
