tweeter and woofer wattage

[Ryan99]

Hi guys, I'm going to be building a 2.1 Bluetooth boombox and am going to be putting in midrange woofers and tweeters along with a sub. my question is do you add the woofer and tweeters RMS power rating together when figuring the RMS required for your amp? or do you just worry about the woofers RMS? This is the amp I'm thinking about using. https://a.co/d/2hA3bLa
Thanks guys!

 

[Chrispy]

I think you need to do a lot more research and this is better suited for the DIY subforum....

 

[Count Arthur]

With that amp, the sub channel is separate, so no issue there.

However, you will need a crossover for the woofers and tweeters for the left and right channels:

You will almost certainly blow the tweeters if you send a low frequency signal to them.

Unfortunately, I have rough idea of the concept, but actually designing a crossover is above my pay grade.

You also need to take into account the volume of the enclosure.

 

[Ryan99]

With that amp, the sub channel is separate, so no issue there.

View attachment 431366

However, you will need a crossover for the woofers and tweeters for the left and right channels:

View attachment 431365

You will almost certainly blow the tweeters if you send a low frequency signal to them.

Unfortunately, I have rough idea of the concept, but actually designing a crossover is above my pay grade.

You also need to take into account the volume of the enclosure.

I should probably clarify. Im talking about the midrange woofer and the tweeters RMS. And as far as the crossover goes ive got alot more research to do on those haha thanks for replying

 

[Count Arthur]

How much power you need for a given volume, depends on the efficiency of the drivers, the size of the enclosure and the impedance of the speaker, with the crossover.

If the amps specs are accurate, that should be plenty, unless your planning on building something that goes loud enough to shake the walls in an aircraft hanger.

 

[Zek]

If the amps specs are accurate

The data is not even close to being realistic.If a 36V 10A power supply were to be used, with 95% efficiency, the most that could be obtained is about 340W of total output power with probably 10% distortion.

 

[Count Arthur]

The data is not even close to being realistic.If a 36V 10A power supply were to be used, with 95% efficiency, the most that could be obtained is about 340W of total output power with probably 10% distortion.
View attachment 431443

Yes, specs are likely very optimistic.

Regardless even if we conservatively estimate ~50W per channel. That should be enough for a "boombox" to get to moderately loud levels.

Those ghetto blasters from the 80s were likely only 5 to 15W per channel, and entry level Class AB home hi-fi amps were typically only in the region of 30 to 60W.



This one even says "BOOMBOX" on it.