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13 votes

What is the value of having tube amp in guitar power amp?

It's an oversimplification to claim that "the tone change is done in the preamp". It's the complete signal chain that results in the final sound, including the power amp and the speaker ...
Matt L.'s user avatar
  • 20.1k
7 votes
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Is it mandatory to let tube amps warming up ? What are the risks of not doing that?

The way tubes work is that electrons are "boiled" out of the cathode by heating it, and then pulled across to the anode by the different voltages inside the tube. The only way you can damage a "cold" ...
guest's user avatar
  • 577
6 votes

What is the value of having tube amp in guitar power amp?

Tube power stages only have a notable effect when driven at high signal levels, so they don't just linearly amplify the signal but soft-clip it somewhat. This is in effect also what high preamp-gain ...
leftaroundabout's user avatar
3 votes

What is the value of having tube amp in guitar power amp?

Although there is nothing "magical" about vacuum tubes that couldn't be emulated with a transistor-based circuit in a power amp, most transistor-based amps are designed to behave as thought ...
supercat's user avatar
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3 votes
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Can I use headphones with tube guitar amplifier without headphone jack?

To be sure I understand, you want to plug headphones into your speaker out on a tube amp head? I would say absolutely not. It doesn't matter what you have plugged into your FX loop. If you want ...
Tim Consolazio's user avatar
3 votes

5 watt tube Amp has 2 8ohms outputs and I have 2 1x16ohm speakers. Can I connect them together?

Doing so, you will not be able to enjoy the "full power" of your amp: because of the impedance mismatch, part of these 5W will no be transferred to the cabs. In the end you will get lower ...
Tom's user avatar
  • 5,092
3 votes

What is the value of having tube amp in guitar power amp?

A solid-state amp has some decent features that are worth considering when buying an amp. For high-gain sounds I have found that solid-state makes the controlling of the gain more precise, a solid-...
Neil Meyer's user avatar
3 votes
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What is a buffered effects loop in a guitar amp?

The short answer is that it is for stomp boxes. Stomp boxes are normally designed to be put between the instrument and the amplifier so they have different levels than the (usually rack mount) effects ...
Todd Chaffee's user avatar
3 votes

Do vintage guitar amplifiers really sound better when run at lower voltages?

Better is very subjective, but the simple thing to acknowledge is that you are operating an electronic device outwith the parameters for which it was designed. Therefore you cannot assume it will ...
ABragg's user avatar
  • 1,243
3 votes

How can I connect an external cabinet to use it at the same time as a combo amp's built in speaker?

I did this 3 days ago and it works a treat, BUT, the combo speaker is 8ohm and so is the external. It's ok to attach more ohms to the amp but not less. I think what you want to do will work, however ...
Billy Ray's user avatar
3 votes
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Potential Tube Amp Issue

If your amp works and if it sounds OK you haven't damaged it. We all know that tube amps shouldn't be operated without a load, but depending on the exact circuit and on the power tubes, most tube amps ...
Matt L.'s user avatar
  • 20.1k
2 votes

Preamp Valve gone in 'hissing' amp?

If the hissing gets louder as the volume control is increased, the source of the hiss will be before the volume control. I would start looking at the input lead(s) and sound source (guitar). Swap the ...
Emma's user avatar
  • 596
2 votes

my Fender Super Champ X2 makes a whooshing sound, will new tubes fix this?

Five or ten minutes is not tube warmup (which is more like 15sec) but rather the warmup of other circuitry. That may include bad solder joints. It's often possible to hunt such thermal problems down ...
user38042's user avatar
2 votes
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keeping tube amps in optimal condition

There's no special treatment, just avoid mechanical shock (tubes have parts that can move under shock, and they're obviously in a glass envelope), and moisture (including beer ...), the latter of ...
Matt L.'s user avatar
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2 votes
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Do vintage guitar amplifiers really sound better when run at lower voltages?

My variac arrived today and I have to say I'm very happy with it. My wall voltage seems to run a little high usually between 120-123V so the knob on the variac was a little off from the actual ...
tjwrona's user avatar
  • 775
2 votes

What is the value of having tube amp in guitar power amp?

Do we really need tube amp for power amp? I understand that the tone change is done in the preamp. The situation is nuanced. For instance, the late Eddie Van Halen's legendary sound is almost ...
Kaz's user avatar
  • 3,677
2 votes

Can I use headphones with tube guitar amplifier without headphone jack?

Regarding the MONOPRICE Tube 112, as I understand it, and on the one I own, connecting anything to the speaker cabinet out plug disconnects the internal speaker. If yours does not, then I suspect ...
Bill Welch's user avatar
2 votes

Can I use headphones with tube guitar amplifier without headphone jack?

As far as I know, the external cabinet output must be after the power amp stage, otherwise your signal wouldn't have enough power to drive the speakers. So if you interrupt the signal path at the ...
Vegard's user avatar
  • 165
2 votes

Can I use headphones with tube guitar amplifier without headphone jack?

If you have 1/4" Headphones with 8-16 Ohm resistance, just plug them into the external speaker jack. You will need a 1/4 Mono to Stereo converter plug (Mono Male, Stereo female), but that's all.
PeteCon's user avatar
  • 1,920
1 vote

What is the value of having tube amp in guitar power amp?

Benefits can be cost or convenience in using the design as an amp. Also in reliability and other NFRs such as perceived sound differences. Like @Neil Meyer said it is really up to personal ...
post as a guest's user avatar
1 vote

5 watt tube Amp has 2 8ohms outputs and I have 2 1x16ohm speakers. Can I connect them together?

Wiring the two cabs in parallel, and connecting to one 8 Ohm output will make it match. By connecting each cab to each output the amp won't be harmed - the load of 16 Ohms is greater than the 8 Ohms ...
Tim's user avatar
  • 194k
1 vote

Is it mandatory to let tube amps warming up ? What are the risks of not doing that?

A certain amount of heat in a tube amp is a good thing. Tubes do need to warm up to function properly, but the warm up time is minimal, a minute or two is satisfactory, after that you're just wasting ...
skinny peacock's user avatar
1 vote

Can I connect a microphone to a valve amp?

Yes, with an impedance matching transformer like this one: https://www.sweetwater.com/store/detail/LittleIMP--whirlwind-little-imp-lo-z-xlr-to-hi-z-1-4-inch-inline-impedance-matcher
Todd Wilcox's user avatar
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1 vote
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Tube amplifier buzzing

If anyones interested I managed to find a reasonable solution to this (which didn't cost the earth) Also just want to say thanks for all your suggestions. They all helped in some form or another to ...
Owen Tracey's user avatar
1 vote

Tube Amp to Headphones

The main purpose of the power soak is not to reduce the signal level, but to offer a reliable low impedance like a cabinet, even if none is connected. A tube power amp requires such an impedance, else ...
leftaroundabout's user avatar
1 vote

Do vintage guitar amplifiers really sound better when run at lower voltages?

You are better off with 10% too much voltage than 10% too little. Higher voltage stresses condensers and some other parts, but their tolerances are pretty high. Lower voltage, however, leaves the ...
user35151's user avatar
1 vote

Do vintage guitar amplifiers really sound better when run at lower voltages?

The simplest answer is no...and yes! It will sound different, and you may find a voltage that changes the valve bias to a level that you like the sound of. But you may not. There are plenty of amps ...
Doktor Mayhem's user avatar
  • 36.9k
1 vote

How can I connect an external cabinet to use it at the same time as a combo amp's built in speaker?

Plug the 16ohm external speaker into the socket labelled 16ohm. The designer of the amp will either have arranged things so that the internal speaker continues to work, or not. If not, I suggest ...
Laurence's user avatar
  • 93.3k
1 vote

Why do tube-based guitar amplifiers sound so good?

Just for info: a few years back an electronics specialist friend took my 'classic' valve guitar amp into the lab and ran a few tests. Now this person had been educated to believe that solid state was ...
Dean Wyrre's user avatar

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