Quote:
Originally Posted by Love Brokers
You talking about "the old vacume tubes" that use to be used in t.v.s and radios?
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Yup. Any GOOD amp has tubes. They have a natural compression that is great for reproducing guitar, bass and vocals. The tubes actually allow the signal to saturate at the plates to give you that nice clipping sound known as "overdrive". Tube overdrive is basically a signal that has distorted but in a pleasant way. Solid state electronics IE: Transistors tend to clip too exactly and give a harsh distortion. Also, since solid state can do perfect reproductions of audio signals it tends to reproduce everything including the less desirable frequencies and overtones. Overtones are the frequencies that happen when two separate frequencies overlap each other. Such as in chords. Since tubes are not as accurate they tend not to amplify the overtones leaving you with a pure signal and well mixed pack of frequencies. Tube circuits are actually better at filtering out unwanted parts of the frequency spectrum. Guitar is in a certain spectrum, I'm not sure of the range but it's roughly 300 to 7khz. When solid state goes into overdrive mode they tend to produce clipping up into the 20hz range all the way down to 1hz. So to clarify, tubes keep the clipping in the proper range and just sound much more warm and natural.
There has been great strides by engineers to reproduce tube characteristics in solid state equipment using a DSP chip but it's still not the same. They tend to lack something, personally I find DSP generated tones tend to be chunky. Like part of the signal is missing and clipping unnaturally.
Line6 is a really popular line of amps because of their DSP that produces decent tones, but it's nowhere near sounding like an actual all tube rig. People claim it does only because they've been brainwashed by smoke and mirrors. Some popular DSP based amplifiers even incorporate a 12ax7 preamp tube in the signal path so people think it has a tube sound. The truth is, their usually just used to pre-amplify the signal before hitting the DSP and that's about it. No voicing from the tube at all, it all gets eaten up by the A/D converters and DSP processing.
Tubes also tend to be much much louder sounding than solid state. I can't explain it but it's a fact. An 18 watt push/pull tube power amp produces roughly the same volume as a 50 watt solid state amplifier. The 30 watt JTM-45 I am ordering is as loud as a 100 watt solid state Peavey combo. Which is fucking loud.
If you listen to recording artists who play guitar you will notice that the distortion sounds tend to be really warm and pleasing, not at all harsh. Then go listen to a crap garage band and you'll hear pure harsh noise coming from their speakers. Usually these crap garage bans are running solid state equipment such as Peavey special 2x12's or old Traynor solid state stacks.
Do your son a favor and hook him up with an all tube rig. I swear, he'll really appreciate the sound and probably proactive until his fingers fall off. Nothing inspires a soul like having good sounding equipment. Just make sure you get him a Marshall power break if he plans to drive the power amp tubes into saturation or you'll all go completely fucking deaf.
If he is serious about music and can wait a little bit of time for the amp you should go to
http://dobermanamps.com and order the 18watt Marshall clone or grab a p1-extreme. the 18watt is more like a classic sound, like ac/dc. The p1-extreme is that of a 68-69 Plexi but at reasonable volumes that he can actually jam in a band with if need be and can produce some incredible high gain tones, meaning more overdrive.