Ok guys i was just wondering if you could replace a amp speaker with just any speaker of the same size or does it have to be an amp speaker???

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--Hillbilly
Proud member of the 2 or 3 club

It needs to be an instrument amplifier speaker.You must match the impedance of the speaker with the amp also.
Guitar amps and Bass guitar amps need specialized speakers also.
What is the specific amp in question?

If the speaker impedance is 4 ohms, can it be an 8 ohm replacement (sorry for hijacking)?

-The Screamin' J

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CURRENT RIG:
2008 Squier bullet stratocaster modified with Rumpelstiltskin pickups -> Dunlop GCB-95 Original Crybaby -> Fender Vibro Champ XD

"Could you take the stain from this pair of pants, and put in on this pair of pants?"

You can do it but the output power of the amp will be half what it was on 4 ohms.

Will the effect be canceled out if it is designed for 25 watts instead of 5 watts?


-The Screamin' J

_________________
CURRENT RIG:
2008 Squier bullet stratocaster modified with Rumpelstiltskin pickups -> Dunlop GCB-95 Original Crybaby -> Fender Vibro Champ XD

"Could you take the stain from this pair of pants, and put in on this pair of pants?"

If you replace a speaker with a higher ohm speaker you are increasing the load on the amplifier, the wattage rating of the speaker has nothing to do with it. It's the power rating of the amp at (?)ohm's You want a speaker rated at a higher wattage than the amp to prevent failure of the speaker. but you should always match the amp's ohm rating You also want to use a speaker designed for musical instruments. A stereo type speaker will not handle the peaks that live instruments produce. All recorded music is compressed to remove these peaks.

Wouldn't miss matching speaker ohms with the amplifier's ohm output cause blowing out the amplifier's transformer or cause fire? I once saw this guy's amp literally caught on fire. The coil in his speaker got so hot it started to burn the speaker cone causing fire.

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http://www.youtube.com/user/gmlasam

It's alright if the impedance on the speaker is greater than or equal to the minimum impedance required. Just look on the back on the speaker out, mine says 4(insert ohm symbol) min-----5W.


-The Screamin' J

_________________
CURRENT RIG:
2008 Squier bullet stratocaster modified with Rumpelstiltskin pickups -> Dunlop GCB-95 Original Crybaby -> Fender Vibro Champ XD

"Could you take the stain from this pair of pants, and put in on this pair of pants?"

As long as you have the cabinet room, speaker size isn't really too big a concern, nothing will get hurt, though your tone will alter drastically from size extremes.


Speakers have two important characteristics: the amount of power they can handle, expressed in Watts; and their impedance, expressed in ohms.

They are matched up, so the speaker load is theoretically the same as the output of the amp.This is an oversimplification, but you should be aiming for the targets, as set out by the labeling of your amp.

Impedance is measured in ohms. It is very important that your output impedance is equal to the equivalent impedance of your speakers.

So look for a speaker that matches the ratings for wattage, and impedance for your amp.

Oh and it's not dumb to ask the question. It's not really common knowledge how this kind of thing is put together. It would be dumb to not know, and go out and buy something wrong and wreck either the speaker or worse your amplifier because you didn't want to be embarrassed asking.

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I'm not an expert, but I play one on the internet.

That's wrong. A lower ohm speaker increases the load on the amp and can burn out the output transformer.

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Member #26797
My other guitar is a Strat.

Let's see if I can remember an analogy someone much wiser than I told me when explaining it to me.

impedance is the characteristic of the speaker (well, whatever electrical load you have, but for us speaker,)that restricts the power flowing flowing from your amplifier.

Think of your whole amp combo as a whole like a shower.You can think of it as being like your speaker is the water pipe, and your amp is the water pump(in your shower at home, the city pumps the water, but...) . The resulting soundwaves, are like the spray from your shower. Think a nice loud volume and clear tone, as a nice shower spray, and a weak volume and poor tone, as the shower dripping. Now imagine that the combo/shower always does its best to provide the best shower experience. if one aspect is weak, another takes on the load, to always try to get the same good shower. (You will always turn your amp up, if the setting it's at is too quiet for you.)

Impedance of your loudspeaker is like the diameter of the pipe. The higher the diameter of your pipe the less resistance. easier for the water to move through. This is a low impedance situation. Like a lower number for ohms. So as the pipe gets wider and wider your water pressure drops. Same amount of water(which is your current,) but instead of coming out of the shower head and spraying you with a nice stream , it dribbles out and drips down. So to keep the flow the same, to give your shower enough output power for the nice stream, the water pump must work harder and harder to push the water hard enough to get the pressure to spray.

If you make the pipe too wide you will burn out the pump.


Now if you make the pipe too narrow, High impedance, or higher number of ohms. You will get the hard spray, but the flow will be severely restricted. Pressure will build up.You will most likely end up bursting the pipe. Or blowing the speaker as it were.

But if you find just the right sized pipe to fit the pump, you get the perfect shower every time.

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I'm not an expert, but I play one on the internet.

Hey Guys Thanks Alot for yur help its just a cheap amp im replacing the speaker in- nothing special, but still a great portable amp.

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--Hillbilly
Proud member of the 2 or 3 club