guys i've gone out and ordered this, but even though its on its way, i would like to know peoples views.
ZK-TB21 TPA3116D2 bluetooth 5.0 Subwoofer Amplifier Board 50WX2+100W 2.1 Channel - US$16.99
i have the 2x50w version as well and it seems to work ok, but interested if there are any tweaks or things to look out for with these cheaper chinese 2.1ch amps. I thought it would be ok for a portable 2.1ch 12v boombox\bluetooth setup
ZK-TB21 TPA3116D2 bluetooth 5.0 Subwoofer Amplifier Board 50WX2+100W 2.1 Channel - US$16.99
i have the 2x50w version as well and it seems to work ok, but interested if there are any tweaks or things to look out for with these cheaper chinese 2.1ch amps. I thought it would be ok for a portable 2.1ch 12v boombox\bluetooth setup
Well their Q&A section hasn't been very well translated: "ripple large power supply will lead to power amplifier bottom noise, there is a current sound"
The things to look out for are poor choice of components in the build (different from the glossy pictures on the website!), and failing to live up to the specification, but you know this I think. Its quite neatly laid out and compact, hope it does what you want. I'd check the inductor temperature when its running some power, its not good if they get really hot, as that implies they are under-rated.
Some BT cheapo amps have annoying tones or chinese voice-overs on connection/disconnection, not normally mentioned in the specs.
The things to look out for are poor choice of components in the build (different from the glossy pictures on the website!), and failing to live up to the specification, but you know this I think. Its quite neatly laid out and compact, hope it does what you want. I'd check the inductor temperature when its running some power, its not good if they get really hot, as that implies they are under-rated.
Some BT cheapo amps have annoying tones or chinese voice-overs on connection/disconnection, not normally mentioned in the specs.
I would instead buy this newer board with aptx hd on the bluetooth. 100W+50W*2 Digital Power Amplifier Board DC12 24V TPA3116 Subwoofer Power Amplifier with Bluetooth 5.0 APTX HD Lossless Decoding|Amplifier| - AliExpress
Cheers!
Cheers!
*Does not compute*
5 potmeters...
So just claiming max peak power at 10% distortion on a completely different layout than what they're selling is not enough anymore?
They got to throw in half a ton of knobs to make it sell?
Pretty please buy something else.
5 potmeters...
So just claiming max peak power at 10% distortion on a completely different layout than what they're selling is not enough anymore?
They got to throw in half a ton of knobs to make it sell?
Pretty please buy something else.
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5 pots.. I dont see redundant pots. Frequensy, level and master. Bass and treblle are nice to have.
Cheers!
Cheers!
I basically waited a day after posting and then ordered it as it was around 20 AUD, actually arrived yesterday around the same time the replies started coming in lol.
First impressions is it looks alright and a bit better put together than the 2*50w version I had, eg pots are all straight and perpendicular to the board. Be interesting to see how the sound quality actually is when booted up.
I do wish I saw that APT-X version prior and had a punt on it, but for now I'll give the board the benefit of the doubt and put it in a project..just not 100% sure on the project yet
First impressions is it looks alright and a bit better put together than the 2*50w version I had, eg pots are all straight and perpendicular to the board. Be interesting to see how the sound quality actually is when booted up.
I do wish I saw that APT-X version prior and had a punt on it, but for now I'll give the board the benefit of the doubt and put it in a project..just not 100% sure on the project yet
IMO it doesn't matter if you have the "fancy" version or not. The one you got has a box already, so less effort required. Sort of doubt there's a lot of difference in regards to sound quality between the two.
At any rate, it is cheap, so I guess it is a cheap solution for a lot of uses.
Perhaps you can find/make some cheap small speakers and start looking for a reasonably priced 4ohm woofer to put in a box. Do you have a power supply?
At any rate, it is cheap, so I guess it is a cheap solution for a lot of uses.
Perhaps you can find/make some cheap small speakers and start looking for a reasonably priced 4ohm woofer to put in a box. Do you have a power supply?
I'm doing a smaller 2.1ch project at the moment, afraid to use this amp as it would have waaaay too much power for 1.5 and 3 inch drivers.
Almost thinking of a my take on a boominator inspired build just don't really know yet
All I know is one night I'll wake up with an idea and it will become an obsession
Almost thinking of a my take on a boominator inspired build just don't really know yet
All I know is one night I'll wake up with an idea and it will become an obsession
I would not worry about that, I would worry about finding cheap enough drivers to match...
If you appreciate sound and music you will stay far below the "rated" power, this thing will not sound nice at 10% distortion.
Pending on what PSU you get to match, I'd expect you to get 2*15-20 + 1*30-40 watts.
Honestly I was just going to use 12v, maybe paired with the dayton LBB board as I have one. So yeah not expecting 2*50 at all, was hoping for 10-20w per channel max
IF! And only if!
The chip is of decent quality and there are no significant defects on the board or surrounding parts (you are completely in the the dark there, trust me).
With a 12v car battery or SLA, at 1% distortion (IMO the number you should look at to get an indication of maximum limits, not 10%) you can expect about 10w in 8 ohm loads, and 20w in 4 ohm loads per the TI datasheet on page 10.
https://www.ti.com/lit/ds/symlink/t...&ref_url=https://www.ti.com/product/TPA3116D2
IMO it actually seems great for a minimum-effort mini-speaker setup.
The chip is of decent quality and there are no significant defects on the board or surrounding parts (you are completely in the the dark there, trust me).
With a 12v car battery or SLA, at 1% distortion (IMO the number you should look at to get an indication of maximum limits, not 10%) you can expect about 10w in 8 ohm loads, and 20w in 4 ohm loads per the TI datasheet on page 10.
https://www.ti.com/lit/ds/symlink/t...&ref_url=https://www.ti.com/product/TPA3116D2
IMO it actually seems great for a minimum-effort mini-speaker setup.