I am curious if anyone has tried a Germino Headroom 100 voiced for bass. Greg is VERY old school and makes amazing guitar amps. I am looking for that early Sabbath-Zep-Cream type tone. I believe in the early days they played out of guitar amps that were revoiced but I'm not sure what gets that sound or if that's even correct. Old pics of Jack Bruce showed he played out of a Marshall, but I'm not exactly sure which one. Any help is appreciated!