Hi there,
I'm building a mobile speaker and looking for a suitable amp with high enough power to drive a 8ohm 15" PA speaker with horn.
Idealy it runs on ~54V DC so i can power it with my e-bike lithium battery.
I thought about using a TPA3255 board but this only puts out ~160w @ 8ohms
Maybe i could run the horn with a second amp and filter at the input, but i think this is still not enough to run the woofer.
Are there any alternatives?
Thank you for any input
Cheers!
I'm building a mobile speaker and looking for a suitable amp with high enough power to drive a 8ohm 15" PA speaker with horn.
Idealy it runs on ~54V DC so i can power it with my e-bike lithium battery.
I thought about using a TPA3255 board but this only puts out ~160w @ 8ohms
Maybe i could run the horn with a second amp and filter at the input, but i think this is still not enough to run the woofer.
Are there any alternatives?
Thank you for any input
Cheers!
Hello,
It would be nice to know which speaker it is your going to have and what the sensitivity is. Most 15" speakers are very efficient e.g. at 1 metre with 1 Watt input the output will be 90 db! Don't stand that close for any longer than about 20 mins it would ruin your hearing.
Cheers
It would be nice to know which speaker it is your going to have and what the sensitivity is. Most 15" speakers are very efficient e.g. at 1 metre with 1 Watt input the output will be 90 db! Don't stand that close for any longer than about 20 mins it would ruin your hearing.
Cheers
Hi jemraid,
Thank you for the reply. I thought about using the JBL JRX215 it looks very good on paper with 99 dB SPL (1w/1m)
https://jblpro.com/products/jrx215
Cheers!
Thank you for the reply. I thought about using the JBL JRX215 it looks very good on paper with 99 dB SPL (1w/1m)
https://jblpro.com/products/jrx215
Cheers!
Hello,
May I suggest that you use a db indicating App, the iPad ones are OK, there is an Android one that will go down down to 0.25 secs, use these to determine your own listening levels. In a reasonably sized room that will be 75 to 80 db, reflections will cancel out the 1w at 1mtr, speaker tests are (or should be) done in an Anechoic chamber.
Using that 75/80 db your 99db speaker using 1 Watt will be at 78 db at 7 mtrs away. If you were at 1mtr from your speaker the 75/80 db would occur at 1/128th of a Watt.
Mr Voight would fill a movie theatre with 2 Watts using a similar arrangement.
Manufacturers prefer to obfuscate the obvious to fool the gullible.
Cheers
May I suggest that you use a db indicating App, the iPad ones are OK, there is an Android one that will go down down to 0.25 secs, use these to determine your own listening levels. In a reasonably sized room that will be 75 to 80 db, reflections will cancel out the 1w at 1mtr, speaker tests are (or should be) done in an Anechoic chamber.
Using that 75/80 db your 99db speaker using 1 Watt will be at 78 db at 7 mtrs away. If you were at 1mtr from your speaker the 75/80 db would occur at 1/128th of a Watt.
Mr Voight would fill a movie theatre with 2 Watts using a similar arrangement.
Manufacturers prefer to obfuscate the obvious to fool the gullible.
Cheers
The only manufacturer I know of for single supply amplifier boards that can run from 54VDC is SURE/WONDOM:
https://store.sure-electronics.com/...e Power Supply High Power Series Brochure.pdf
https://store.sure-electronics.com/...e Power Supply High Power Series Brochure.pdf
This one looks like it would work:
https://store.sure-electronics.com/images/documents/1 x 1200 Watt AA-BK31271 BrickSeriesManual.pdf
https://store.sure-electronics.com/images/documents/1 x 1200 Watt AA-BK31271 BrickSeriesManual.pdf
Hello,
Don't waste you money, this will work superbly, as good as any Class A amp
https://www.aliexpress.com/item/400...51-0&pdp_ext_f={"sku_id":"10000011287870738"}Cheers
Most have no idea how to do a proper comparison and rely on 'it sounds better'!
See here for how to do it properly: https://fh3classd.blogspot.com/p/class-d-xh-m590-tpa3116d2.html
Don't waste you money, this will work superbly, as good as any Class A amp
https://www.aliexpress.com/item/400...51-0&pdp_ext_f={"sku_id":"10000011287870738"}Cheers
Most have no idea how to do a proper comparison and rely on 'it sounds better'!
See here for how to do it properly: https://fh3classd.blogspot.com/p/class-d-xh-m590-tpa3116d2.html
Last edited:
Thank you for the replys. I plan on using the speaker outdoors and use its full potential.
This one looks quite promising but they say it only produces 170w @ 8oms:
https://www.aliexpress.com/item/1005003341161743.html
Fully charged the battery has around 57V and it goes down to around 47V.
This one looks quite promising but they say it only produces 170w @ 8oms:
https://www.aliexpress.com/item/1005003341161743.html
Fully charged the battery has around 57V and it goes down to around 47V.
Hello
If you were actually to put 170 Watts into your speaker it would blow the cone straight out of it.
You must learn the simple mathematics e.g. for every 3db increase in volume you need to double the power e.g again 90 db = 1 Watt 93 db = 2 Watts. Use what's between your ears to take it up to 170 Watts.
Cheers
If you were actually to put 170 Watts into your speaker it would blow the cone straight out of it.
You must learn the simple mathematics e.g. for every 3db increase in volume you need to double the power e.g again 90 db = 1 Watt 93 db = 2 Watts. Use what's between your ears to take it up to 170 Watts.
Cheers
Thank you, so if i want to use the full potential of the speaker the recommendation for a 250 - 500w amp is about correct.
I need a battery powered single speaker that it at least as loud and cheaper than the big bluetooth sets from jbl,teufel etc.
This seemed the right way to go.
I need a battery powered single speaker that it at least as loud and cheaper than the big bluetooth sets from jbl,teufel etc.
This seemed the right way to go.