Amplifier Watts Question...

[CREATURE58]

Ok so I read online about what the gain knob on an amp does and hoe wit has to be adjusted to the head unit. What I haven't been able to find is what turns up and or down the watts on an amp? I have a PLA4278 2000W Channel amp. Its rated at 500 watts per channel. I have two TS-W304R Pioneer subs (300w Nominal, 1300w Max) and two Ts-a6995r 6x9's (100W Nominal, 600W Max). I just want to know how to adjust the wattage to both subs and 6x9's. I would like to power the subs at 500 each and the 6x9's at 300?

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[CSCStang]

Ok so I read online about what the gain knob on an amp does and hoe wit has to be adjusted to the head unit. What I haven't been able to find is what turns up and or down the watts on an amp? I have a PLA4278 2000W Channel amp. Its rated at 500 watts per channel. I have two TS-W304R Pioneer subs (300w Nominal, 1300w Max) and two Ts-a6995r 6x9's (100W Nominal, 600W Max). I just want to know how to adjust the wattage to both subs and 6x9's. I would like to power the subs at 500 each and the 6x9's at 300?

Go to the12volt.com and search "setting gains, the dmm method."

 

[CREATURE58]

Like I said I already read up on gains. I want somebody to specially tell me which knob is to turn the wattage up and down. The gain knob is not for that

 

[UGHH]

Like I said I already read up on gains. I want somebody to specially tell me which knob is to turn the wattage up and down. The gain knob is not for that

Yes it is. If you set it with a dmm, you can push however many watts you want to your speakers. Just don't go over the rated rms watts or you will clip

 

[UGHH]

Google "amp gain voltage chart," and look at the images

 

[CSCStang]

Like I said I already read up on gains. I want somebody to specially tell me which knob is to turn the wattage up and down. The gain knob is not for that

Read more then........

 

[Spl4200]

You do know there talking about the gain on you amp and not your bass knob right? Because your gain on the amp is how you'd change the watts to your speakers.

 

[Jeffdachef 5,000+ posts]

First off guys, he cant even use the DMM method because the DMM method assumes that your amp outputs proper power. His pyle 4 channel amp would be lucky to do 30-40 real watts a channel.

OP your gain knob is the level setting on your amp. Like i said before you'll blow your sh*t if you try to set them for 500 watts rms with the DMM method.

 

[What was that? 10+ year member]

You can't set anything for individual speakers unless your amp has separate gains. If it does have two gain controls then use the method these other guys have suggested.

 

[Jepalan]

Don't worry about it. Pyle rates their amps at peak power. That amp cannot over power those subs. Just make sure gains are set properly so the amp doesn't clip the signal.

The PLA4278 has 2x25amp fuses on it's input, so at a typical 75% efficiency it is only going to put out about 130 watts RMS per channel at most [(14 x 50 x .75)/4 = 130]

Set your gains using a DMM. See one of these links:

How to Set Your Gains

GlassWolf's Pages

 

[Jeffdachef 5,000+ posts]

Don't worry about it. Pyle rates their amps at peak power. That amp cannot over power those subs. Just make sure gains are set properly so the amp doesn't clip the signal.
The PLA4278 has 2x25amp fuses on it's input, so at a typical 75% efficiency it is only going to put out about 130 watts RMS per channel at most [(14 x 50 x .75)/4 = 130]

Set your gains using a DMM. See one of these links:

How to Set Your Gains

GlassWolf's Pages

hell 80 dollars brand new for a 130 rms x 4 channel amp thats a bargain right there!

dude.. Its pyle.. You see how many of these get bench tested and amp dyno'd? they are lucky to even do 1/8 of their rated rms power cleanly.

He cannot use the DMM method if he does not know how much power the amp can specifically put out cleanly. He will easily drive it into levels of clipping and distortion. DMM method is no where near a sure fire method especially with questionable equipment with unreliable performance.

he'll shoot for a modest rms number and try to get the proper voltage and all of the sudden find himself in the 95% gain setting with bass boost on to reach that number and he'll start banging away.

 

[n2audio 5,000+ posts]

Can't believe it took 10/11 posts to get to the issue here.

OP -- even the 130w approximation is misleading. That would only happen at 2 ohms per channel.

With a pair of 4 ohm speakers and a pair of 4 ohm subs you're looking at 75-90w per speaker/sub.

You have to understand cheap amps LIE about power output. It's how they stay in business.

If you take the 6x9's off the amp and bridge it to run JUST the subs it would do a decent job giving you ~250w rms per sub.

Then you'd need to add a 2nd amp ~100x2 to run the speakers.

 

[hispls 5,000+ posts]

Yes it is. If you set it with a dmm, you can push however many watts you want to your speakers. Just don't go over the rated rms watts or you will clip

Really? Precisely what voltage is he looking for?

Like I said I already read up on gains. I want somebody to specially tell me which knob is to turn the wattage up and down. The gain knob is not for that

The volume knob on your head unit is to control the output of the amp once gains have been properly set.

 

[UGHH]

Really? Precisely what voltage is he looking for?



The volume knob on your head unit is to control the output of the amp once gains have been properly set.

I have no idea what his amp actually puts out so I have no idea. That's on him to figure out

 

[Jepalan]

hell 80 dollars brand new for a 130 rms x 4 channel amp thats a bargain right there!dude.. Its pyle.. You see how many of these get bench tested and amp dyno'd? they are lucky to even do 1/8 of their rated rms power cleanly.

He cannot use the DMM method if he does not know how much power the amp can specifically put out cleanly. He will easily drive it into levels of clipping and distortion. DMM method is no where near a sure fire method especially with questionable equipment with unreliable performance.

he'll shoot for a modest rms number and try to get the proper voltage and all of the sudden find himself in the 95% gain setting with bass boost on to reach that number and he'll start banging away.

Jeff - point taken re unknown power limit to use for DMM gains - my bad. OP should use an o-scope or get a better (real) amp. I vote for a new amp.