Read the December 2015 issue online

Ask Amp Man

It’s no secret that tube amps require regular TLC to sound their best. But it doesn’t stop there: Tweaking key components can yield dramatic sonic benefits—but you have to know what you’re doing. Whether you’re looking for more gain, higher clean headroom, or simply want to return an old combo or head to its former glory, amp guru Jeff Bober has the answers you’re looking for. Got questions? Shoot him an email at


Ask Amp Man: Raising the Roof on a Peavey Classic

November 29, 2015
Discover tricks to increase headroom in this popular 20-watt head.
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Ask Amp Man: Upgrading a Fender Custom Vibrolux Reverb

November 11, 2015
Get beefier tones and stronger reverb from this popular reissue.
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Ask Amp Man: Taming a Twin Reverb

October 20, 2015
Can you reduce the power of a JBL-equipped Twin without sacrificing its signature sound?
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Ask Amp Man: Demystifying the Ibanez GX20's Volume Knobs

August 18, 2015
How to make sense of the cascading gain stages in a 1980s solid-state combo.
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Ask Amp Man: Troubleshooting a Peavey Classic 50

July 27, 2015
The Peavey Classic line included some of the company’s finest amps—but they require special troubleshooting procedures.
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Ask Amp Man: Fattening Up a Fender Super-Sonic 60

June 9, 2015
Simple circuit tweaks to fatten the vintage channel and balance the burn channel.
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Ask Amp Man: Beefing Up a Vintage Fender Vibrolux Reverb

May 27, 2015
Can you turn a vintage Fender Vibrolux Reverb into a mini Super Reverb?
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Ask Amp Man: Restoring a 1979 Fender Twin Reverb

April 19, 2015
A modded monster regains its former “glory.”
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Ask Amp Man: Taming a Hiwatt DR-201

April 6, 2015
When it comes to super-powerful tube amps, can you have too much of a good thing?
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Ask Amp Man: Tweaking a Fender Champ II

February 22, 2015
The rare Fender Champ II—and some ways to improve it.
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