Tda7265

[thetube0a3]

hey guys,

I'm throwing together a TDA7265 amp out of parts I have laying around and i'm curious what this thing is going to sound like. The spec sheet shows it having pretty bad specs. Reminds me of a cheap TV output for surround speakers.

Does this thing have any hope of sounding good?

[thetube0a3]

Have a 2nd easy question.

Since im building this from parts I already have. I have a bunch of electrolytic caps. Can I throw in two 10uf 25V polarized electrolytics on the input as coupling caps? ive seen where people use caps when its with small signals like this.

When I say two. I mean one per channel, not two back to back.

[mjf]

hello.
why should it sound bad? this is a chipamp as many others around.............will sound like the others.
a 10uf/25v elco on the input should be no problem (if you do not excess the input volts).
you will have to think about speaker load and psu voltage..........4 or 8 ohm speakers........+-16v or +-20v or so..............
and a good (=big) heatsink (chip mounted with isolation material on it).
greetings

[pacificblue]

Originally Posted by thetube0a3

Does this thing have any hope of sounding good?

As long as you don't push it. At moderate volumes it will sound okay.

[thetube0a3]

I'm planning on using two 19V SMPS desktop bricks. We have tons of them here and they are good for 3A a piece. Two together should give me a decent bipolar supply.

[pacificblue]

19 V? Are they for laptops? Then cross your fingers that they are not noisy. And make sure that the output has no connection to PE, before connecting two as split supply.

[thetube0a3]

They are for laptops in a way. The output is pretty stable and quiet. They are also isolated.

If they end up being noisy we will find a way to quiet them down. Or just ditch the idea.

[sexya]

hii have m using this chip currnetly and to me they sound ok, not bad, and the only thing is that u need to make the cirucit asper the datasheet, u can keep the mute/standby pin floating , no issues,

i like the sound and mine is running at + - 22v with 8ohm dayton classic shielded 5.25" woofer

[pra3718]

Sexya,

u can keep the mute/standby pin floating

Are you sure ? because tda7294 does not sound if I keep mute/standby pin floating/not connected.

Did you try for tda7265 bridge ?

[wahab]

Originally Posted by thetube0a3

I'm planning on using two 19V SMPS desktop bricks. We have tons of them here and they are good for 3A a piece. Two together should give me a decent bipolar supply.

Very dangeourous...

Both smps have the minus connected to earth.
So the negative side of your power supply will be
in short circuit to ground , unless you cut the negative supply
earth wire.