https://de.aliexpress.com/item/1005....0.0.1e684ae4dBxdZb&mp=1&gatewayAdapt=glo2deu
I just found this and it looks not bad. With DSP bluetooth chip.
I just found this and it looks not bad. With DSP bluetooth chip.
Yep, this thing has potential.
TPA3255 implementation is pretty basic (someone opened the amp up a while ago on the forum), but the DSP chip makes up for it.
DSP can be changed through PC software, gotta contact the seller to get that though.
TPA3255 implementation is pretty basic (someone opened the amp up a while ago on the forum), but the DSP chip makes up for it.
DSP can be changed through PC software, gotta contact the seller to get that though.
Hi
I have build a few different Amps but i'm still using TPA ... It Sound best Overall for me
Now i tested with active xover between Bass (10 inch) and Mid/High ( 8 inch + ribbon tweeter)
The passive Crossover at 180Hz is Not the best Idea
The active one Sounds more precise
If you have a Chance to select a TPA amplifier ... What would you do?
2x TPA in Stereo In Standard BTL Mode
Then you have two Options
One TPA for Bass other for high/Mid
Or
That one TPA for left other TPA for right
Last Option is to use one TPA in PBTL Mode for every channel
What would you prefer?
I have build a few different Amps but i'm still using TPA ... It Sound best Overall for me
Now i tested with active xover between Bass (10 inch) and Mid/High ( 8 inch + ribbon tweeter)
The passive Crossover at 180Hz is Not the best Idea
The active one Sounds more precise
If you have a Chance to select a TPA amplifier ... What would you do?
2x TPA in Stereo In Standard BTL Mode
Then you have two Options
One TPA for Bass other for high/Mid
Or
That one TPA for left other TPA for right
Last Option is to use one TPA in PBTL Mode for every channel
What would you prefer?
Hello all, I am thinking of building my own setup and using a TPA3255 2x160W 4 Ohm from Audiophonics, However I am completely stumped on what type of power supply to use. If anyone has any recommendations I would be eternally grateful, its driving me loopy. Thanks.
I like the 36V version of the Connex SMPS300RS -
https://connexelectronic.com/product/smps300rs/
Or you could save a few pennies with the 36V 500W version of this -
https://www.aliexpress.com/item/4000523247624.html
https://connexelectronic.com/product/smps300rs/
Or you could save a few pennies with the 36V 500W version of this -
https://www.aliexpress.com/item/4000523247624.html
The Connex is also available from Audiophonics, for a higher price, but shipping is possibly cheaper, and you get European sales backup -
https://www.audiophonics.fr/en/smps...00rs-power-supply-module-300w-80v-p-9996.html
https://www.audiophonics.fr/en/smps...00rs-power-supply-module-300w-80v-p-9996.html
This is the Connex at 36V on audiophonics:
https://www.audiophonics.fr/en/smps...hing-power-supply-module-300w-36v-p-6311.html
https://www.audiophonics.fr/en/smps...hing-power-supply-module-300w-36v-p-6311.html
I'm sure this was addressed earlier, but....
I realize the large electrolytic output capacitor is needed when running this amp single-ended, and it's not needed in BTL mode. Is there any harm in using a 4700uf capacitor in BTL mode? It seems like that would add some DC protection if the BTL amp was used in an active crossover situation.
I realize the large electrolytic output capacitor is needed when running this amp single-ended, and it's not needed in BTL mode. Is there any harm in using a 4700uf capacitor in BTL mode? It seems like that would add some DC protection if the BTL amp was used in an active crossover situation.
you would have to use 2 in series, connected + - - +, as the polarity on the speaker terminals changes as the music swings + to -. In BTL mode the speaker terminals are midway between the positive rail and ground. In SE mode the output can only swing from the positive rail to ground.
Seems to me that a non-polar capacitor can be used as long as the voltage on the + side of the cap is never less than the voltage on the - side.
In the case of BTL, that will still be the case. Given a 10 volt DC power supply, when either amp is swinging from 0 - 10 volts, the + side of the capacitor will be swinging from 0 - 10 volts, and the - side will be swinging from -5 to +5 volts. The voltage on the + side is always greater than the - side.
What am I missing?
In the case of BTL, that will still be the case. Given a 10 volt DC power supply, when either amp is swinging from 0 - 10 volts, the + side of the capacitor will be swinging from 0 - 10 volts, and the - side will be swinging from -5 to +5 volts. The voltage on the + side is always greater than the - side.
What am I missing?
No, given a 10 volt power supply with a BTL amplifier. Each output terminal you will be at +5 volts. During the positive music cycle the positive terminal will approach 10 volts and the negative terminal will approach 0 volts. The positive terminal will be more positive than the negative terminal. During the negative music peaks the positive terminal will approach 0 volts and the negative terminal will approach 10 volts. The negative speaker terminal will be more positive than the positive speaker terminal. With a 10 volt supply and a voltmeter placed across the speaker terminals, you will see 20 volts peak to peak across the speaker or 7 volts RMS when the amplifier is driven to clipping.
You have to change a few things both on the input side and on the output side.
If you can't get by with TI's TPA3255 schematics to make these changes, I suggest going straight to the mono board.
If you can't get by with TI's TPA3255 schematics to make these changes, I suggest going straight to the mono board.
Power supply recommendation 32v and above 6a, it has to be a of a laptopt type plug and play
My stock Fosi audio TB10D isn't the best so im using an older 24v,10 amp power supply (don't know the quality of that compared to the stock 32v 5a fosi audio power supply)
My stock Fosi audio TB10D isn't the best so im using an older 24v,10 amp power supply (don't know the quality of that compared to the stock 32v 5a fosi audio power supply)
Gasolin,
Depending on the type of speaker and listening level, even a 19V 4.7A laptop adapter will work 😉 Tried it with my A07 and it worked well enough.
24V 10A is plentiful.
The bundled adapters that come with these amps are not going to be "hifi" by any means, so no need to worry about them.
Depending on the type of speaker and listening level, even a 19V 4.7A laptop adapter will work 😉 Tried it with my A07 and it worked well enough.
24V 10A is plentiful.
The bundled adapters that come with these amps are not going to be "hifi" by any means, so no need to worry about them.