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Tone
,→Power Amp
Power amps may also offer various levels of negative feedback, which attempt to minimize any unwanted distortion (outside of overdrive distortion) created by the amplification process. Depending on the design of the amp, these may work wonders to offer a pristine signal, or introduce additional issues. An amp with good negative feedback will make the amp sound cleaner, more responsive, and have a richer tone. Again, however, the allure of some vintage amps is that the distortion their design allowed was found to be musically pleasing. The only way to know which amps have good or bad designs is to research and audition them individually, for your subjective taste.
Power amps also have "interaction" with the speakers/cabinet they drive. So an amp may sound better paired with one cab than another, while another amp has the opposite response. In general, a good power amp will sound good paired with a wide variety of cabs - the change in tone will be mostly due to the different cabs used, not the power amp-cab interaction. However, it is something to keep in mind when choosing an amp.
== Cab/Speakers ==