I have an amp that is 50wx2 for the left and right but my speaker is 230w max


GBloes

CarAudio.com Recruit
Jan 23, 2021
29
6
Hamilton
Just to reinforce this: peak power ratings are meaningless. That’s the absolute most they can handle for millionths of a second without blowing.

So, you’ve got a 50wRMS amp for 40w RMS speakers which is fine, just make sure you set the gains to match the speakers.

Just as an FYI incase it might be helpful: Slowly turn the radio up to a point it starts to sound off, then slowly turn it down until it sounds good then turn it down a bit more [(this is to make sure youre not sending the amp a distorted signal) make sure to remember what volume you end up with). Then slowly turn up the amps gains until the speakers start sounding funny then back the gain off until they sound good again and back off a bit more (to be 100% certain you don’t send them too much power no matter what song you listen to).
Make sure to use either a test tone towards the lower end of the speakers frequency range or music with lots of low end that the speakers will play.

That’s the best way to do it by ear, not the best over all as you’ll end up losing some power. But shouldn’t be noticeable and even if it is it’s far better then risking damage to the speakers.
 

Dingus

CarAudio.com Newbie
Jun 17, 2021
3
0
Somewhere over the rainbow
  • Thread Starter Thread Starter
  • #4
Just to reinforce this: peak power ratings are meaningless. That’s the absolute most they can handle for millionths of a second without blowing.

So, you’ve got a 50wRMS amp for 40w RMS speakers which is fine, just make sure you set the gains to match the speakers.

Just as an FYI incase it might be helpful: Slowly turn the radio up to a point it starts to sound off, then slowly turn it down until it sounds good then turn it down a bit more [(this is to make sure youre not sending the amp a distorted signal) make sure to remember what volume you end up with). Then slowly turn up the amps gains until the speakers start sounding funny then back the gain off until they sound good again and back off a bit more (to be 100% certain you don’t send them too much power no matter what song you listen to).
Make sure to use either a test tone towards the lower end of the speakers frequency range or music with lots of low end that the speakers will play.

That’s the best way to do it by ear, not the best over all as you’ll end up losing some power. But shouldn’t be noticeable and even if it is it’s far better then risking damage to the speakers.
This is one of those cheap bluetooth amps and i don't think i can change gains and things i dont think it has it
 

GBloes

CarAudio.com Recruit
Jan 23, 2021
29
6
Hamilton
As long as you can use anything other than Bluetooth as a source it will have gains (I.e. if it has speaker level or RCA inputs).
 

SlugButter

CarAudio.com Elite VIP
Nov 5, 2019
2,768
939
arizona
I use the tpa3116d2 amp boards for home bluetooth builds often. They put out 25 watts x 2 and 50 watts x1 rms power. Some of them come in cases, like what you posted, but you can buy them with the board only also, which is what I use (so I can mount them inside an enclosure to have an all-in-one stereo).
 

SlugButter

CarAudio.com Elite VIP
Nov 5, 2019
2,768
939
arizona
I just built this one a couple of weeks ago using the tps3116d2, with some added potentiometers and volume controls on it.
EB6C5887-0B54-4FCF-ADE9-E2C3032E04A1.jpeg
 
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SlugButter

CarAudio.com Elite VIP
Nov 5, 2019
2,768
939
arizona
Technically, the volume knob is the gain on these. On mine, I have 3 volume knobs. A satellite speaker volume knob, a sub volume knob, and a master volume knob. The other 2 are crossover adjustments for the sub and satellite speakers. I’m not sure how yours is set up.
 

SlugButter

CarAudio.com Elite VIP
Nov 5, 2019
2,768
939
arizona
This is my shop radio, using the same amp board but with a digital screen instead of physical knobs. Regardless of the features that come on these, they all put out 25 watts x 2 and 50 watts to the sub channel.
45F7893A-4AD6-4311-A976-D227AA97AC0D.jpeg
 

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