SWR 550X Bass Head With Rack Case - Used

SWR 550X Bass Head With Rack Case - Used

Marsoni

M251S

$218.47

Get it in 3 business days with 1 day shipping. Friday, May 29

SWR 550X Bass Head With Rack Case - UsedThis SWR 550X Bass Head With Rack Case is in good condition and is in fine working order. The SWR 550x is solid state bass head putting out 550 watts at 4 ohms or 375 watts at 8 ohms. The preamp does feature a 12AX7 for a more natural tube sound. There's plenty of control over your sound with a variable EQ, Aural enhancer circuitry, and a limiter defeat switch. Not to this amp comes built in to a rack case.

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Reviewed in the United States on July 29, 2024

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Volodymyr Bilov

Phoenix, US

★★★★★ 5

super delivery

Size: 5 Liter

excellent quality, super delivery

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Reviewed in the United States on February 15, 2026

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Gearheaddaddy

Alexandria, US

★★★★★ 5

Black but don’t worry it is supposed to be. It works!

Size: 1 Liter

This stuff looks like used motor oil but don’t worry that is the molybdenum disulfide (MoS₂) which is black. This stuff in a small engine makes it smooth as silk. I used it all season in my leaf vacuum small engine. I could hear the difference. It was quieter and smoother.

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Reviewed in the United States on December 7, 2025

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Matthew Vaughn

Bozeman, US

★★★★★ 5

High Quality Oil

Size: 5 Liter

Good quality oil! I was just buying the mos2 separate until now

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Reviewed in the United States on January 15, 2026