Hank Presswood

The Celestion Alnico Blue chimes; the Greenback grinds. In a Vox AC30, that one speaker choice decides whether your worship tone sparkles or sits warm under the mix.

Which string breaks, why it breaks where it breaks, and the exact under-pressure procedure to get it back in tune and hold pitch before the next song — plus the locking-tuner shortcut.

Passive ribbons are quiet, so the advice is always "get a Cloudlifter." On a loud guitar cab that's often wrong. Here's when an inline booster earns its keep — and when it doesn't.

Older amps carry dedicated Preamp Out and Power Amp In jacks — not the same as an effects loop. What they do, why Power Amp In kills the preamp, and how to slave one amp into another.

In a cab with two different speakers, the one wired closest to the input jack takes the biggest current surge. Here's the old shop rule, what it actually protects, and what really changes your tone.

Preamp gain and power-amp saturation sound and feel different. A three-step listening test — starting with your guitar's volume knob — tells you which one you've actually got.

Yes, with two rules: match the impedance and rate the cab off the lowest-wattage speaker. Here's the wattage math, the impedance trap, and the Greenback-and-V30 mix.

Get the voltage right abroad and a vintage amp can still run hot. The reason is mains frequency: 50Hz pushes an old 60Hz transformer toward saturation. What it does over a long set, and when to care.

Mains voltage changes how a tube amp breaks up. What a US amp does on Japan's 100V versus the UK's 230V, and how to travel without frying a transformer.

The wattage on your amp is not the number to size a converter against. How to find its real wall draw, why you double it, and which way to convert for Japan versus the UK.

Bone, Tusq, Black Tusq XL, and Corian compared by hardness, tuning stability, and tone. Which nut material to pick after a recut, and which to skip.

Most tuning problems blamed on tuners are actually nut binding. A step-by-step procedure for filing, lubricating, and seating slots so the string returns to pitch after a bend.

The three vintage-style tuner sets every Strat and Tele owner cross-shops. We measured slip behavior, weight, mounting compatibility, and what each one actually feels like under a bend.

The folk wisdom says tube rectifiers sag and solid-state rectifiers don't. The truth involves transformer impedance, plate voltage swing, and a 1959 amp I rebuilt three times.

Two Studio-line heads. Two of the most modified Marshall preamp topologies ever shipped. Which 20-watt version belongs on your board, and which one actually sounds like the amp it claims to copy.

Same JCM800-circuit 20-watt amp in two formats. The SC20H combo and the SV20H head into a 1×12 are not interchangeable, and the speaker coupling is a bigger deal than people think. Here's how to pick.

Both are sub-$1,000 Marshall heads. One is a single-channel pedal platform, the other is a two-channel hybrid built around a JCM2000 lineage. Here is which one fits which player, and why they are not interchangeable.

Both are 20-watt EL34 Marshall heads with built-in attenuation. One costs half as much. Here is what the extra $800 actually buys you, and which player should stretch for it.

The EL84 compresses earlier and chimes harder than an EL34, and as a quartet inside an AC30 it makes a sound no other power tube can imitate. The tube behind British chime, explained.

Cathode-biased amps adjust themselves. Fixed-bias amps don't — which means every tube swap is a potential date with a multimeter. Here's what rebiasing is, why it matters for tone and tube life, and how to know when your amp needs it.

Almost every amp marketed as "Class A" isn't, including the Vox AC30. Here's what Class A and Class AB actually mean at the circuit level, which amps use which topology, and why the distinction matters more for feel than you'd expect.

Your tube amp sounds different at rehearsal volume vs. bedroom volume, and Fletcher-Munson only explains half of it. The other half is your power tubes aren't doing their job. Here's why, and what to do about it.

The ToneMaster Deluxe Reverb costs $200 less than the tube original. We put both on the same amp stand, dialed in identical settings, and listened. Here's where they agree — and where they don't.

Two different stages in a tube amp can produce distortion. They don't sound alike, they don't respond the same way, and most gear guides conflate them. Here's the actual difference.

Marshall Shredmaster clones and alternatives compared: the Aion FX Solstice PCB, Five Cats Pedals Shredder, Truetone Jekyll & Hyde Hyde side, and how close each gets to the discontinued original.

A practical and technical guide to the difference between germanium and silicon transistor fuzz pedals: how each sounds, why they sound that way, and which belongs in your signal chain.

Gain, volume, and master volume all affect how loud and distorted your amp sounds, but they work at completely different points in the circuit. Here's how to use all three together to dial in exactly the tone you're after.

The essential Fender Deluxe Reverb settings for clean tones, edge-of-breakup, crunch, and pedal platform — plus the differences between the original and the '65 reissue, and how settings translate to modelers.

Klon Centaur settings for clean boost through full drive: exact knob positions, clone comparisons, and the one thing most players set wrong.

Everything you need to know about guitar amplifier technology. How each type shapes your tone, when to use them, and how modelers recreate them.