Bass man circuit

Posted on Feb 6, 2014

The Fender Bassmanis a legendary guitar amp known to both guitar and bass players. It wasintroduced in 1951, primarilytargeted for bass guitar players andpromoted asa bass ampfor the Fender Precision Bass guitar, the first mass-produced electric bass guitar ever. During the different eras the Bassmanampcame in many different shapes and configuratio

Bass man circuit
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ns. Few othermodelsexperiencedso many changesin terms of looks and tone. The next timeyou get intoa Fender Bassman discussion you shouldnarrow down exactwhich era, model and circuityou`re discussing. Otherwise it will justbe a fool`s discussion. The tube charts are not very useful for determining the circuit model. A lof of blackface Bassmanamps withAA864 tube charts are actually AA165 ²s, anda lot ofAA165 charts areglued into AB165 amps. At the Fender factory they used old tube charts when new models came, probably because the tube layout was the same. Determining production date by serial number and transformer codes is better, and you should also inspect the circuit to be completly sure. Unfortunately the Bassman was one of the first amps that CBS laid their hands on after buyingthe companyfrom Leo Fender. A couple of thingsin the circuitry were immediately changed in 1965 when the AA165 and AB165 replaced the AA864. Amp collectors and idealists often prefer the pre-CBS models but if we study the AB165 circuit it does have something very interesting for guitar players who enjoy cranked Fender blackface tones. We`ll come back to this later in the blackface chapter  below where we`lldemystify some of the hypeswith the popular AA864. The AA165 is very rare and its circuit and tone is quite similar to the AA864. We will further focus mostly on the AB165 vs AA864. Some thingshave not changed since the beginning; The Bassman...

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