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Postby BIBJIM » December 25th, 2003, 7:40 am


Postby Preston » December 25th, 2003, 9:37 am

Hi Jim.
For starters, just because an amp has two speakers doesn't automatically make it 'stereo'.

Often, it is determined by what the amps designer wishes to do with the amp. How they want it to sound. A 2x12 (two 12" speakers) will sound different than a 2x8 in the same amp.
Also, you'll usually only find two speakers in amps with higher wattages, though this isn't a hard and fast rule.

Two speakers will move more air, thus making an amp a bit louder for a given wattage. It can also result in a cleaner Clean Channel at higher volumes. This goes back to what the designer had in mind.

I'm sure that you've seen amps advertised as Stereo? I've never tried one, but I think that term is a bit misleading no matter what they do with the electronics.
To me, Stereo is a true seperation of Left and Right. I can't see two speakers that are four inches apart being anywhere near stereo.

I get stereo by running into two amps placed at least ten feet apart. Now I hope this doesn't confuse you :) .
My signal is not stereo, yet. It's the same dry signal going into two amps. So far, the only difference is in the setting of the Tone Controls on each amp.

At the end of my Effects Chain (bunch of boxes on the floor) is a Stereo Phaser. This box has two outputs. One goes Left, the other Right. When the effect is turned On, you can literally hear the volume swell from one side to the other, or the Effect move back and forth. It depends on the Settings that I dial in on the box.

I think whoever decided to call that 'stereo' was just being lazy. There has to be a better term for it! It's still only one instrument. We can't think of it in the same sense as L&R on our audio systems.

For optimal stereo listening; if two speakers are ten feet apart, the listener is ten feet back. Correct?

To be honest, there's only one tune that I really even use it for. Billy Thorpes Children of the Sun. Even then, it only sounds good close up. If I were playing at a party in your backyard, and you were 40 feet away at the volleyball net, you wouldn't even notice the seperation. :'(  

"Don't try to describe a KISS concert if you've never seen it." Jimmy Buffett
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Postby paul donnelly » December 25th, 2003, 11:55 pm

Like Preston said, two speakers will move a lot more air than one.  A 2x10 (two ten inch speakers) moves a heck of a lot more air than one twelve inch speaker.  There's a point at which putting more power into the speaker doesn't make it much louder.  Adding another speaker will increase volume dramatically.  An added bonus is that ten inch speakers can respond a faster than a larger speaker, because the cones are lighter.  Better high frequency output results.  You get some more volume, and better high end.
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Postby forrok_star » December 25th, 2003, 11:55 pm

Most guitar and other instrument cabinets are mono, however Some cabinets are wired stereo, there are four-twelve cabinets come with a stereo-mono switch that hardly no one ever uses, because most guitar heads are mono, and no one wants to use only half the speakers in his cabinet. But there are some times when having a stereo cabinet is useful. its so much easier to have a stereo speakers setup in a single cabinet and just use two speaker cables.

When using stereo its for a good reason. I know there are lots of mono amps with chorus effects, but a guitarist who uses a stereo amp with stereo chorus there really is a different and better quality to the chorus effect if the delayed or pitch-altered sounds are coming out of different speakers.
The speakers don't have to be very far apart to capture this effect.

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