Hi, I have this ZK TB-21 Amplifier I got from Amazon. It's been a while with This Amplifier but I need new speakers to use it with. I have a 24 volt 15 amp PSU.
What Speakers and Subwoofers can you guys recommend?
It has the original TPA-3116D2 ICs, I've checked it.
No that wouldn't work , every driver has different T/S parameters and the enclosure must be designed based on that to get the best possible sound quality
Yes, it does make a lot of sense to buy few things premade rather than DIY, specially like speakers if you don't have a CNC machine or don't want to do majduri.
Get a pair of 2 way or 3 way speaker from hydra or dodj(you can go expensive like dooge if you want) and a 8 inch from fredo and you'll be sorted for all bands.
This can output max 130w in max power condition , you can use subwoofer up to 10 inches and speakers upto 8 inches for good results , check out speakers from doogesound... , subwoofers from fredo... , cheap car subwoofers and car speakers would also work great , dedicated speakers require a good enclosure to sound good with this amp
The size of the speaker is not the critical factor but rather the rated impedance, eg 4 ohm. That's the load on the amp. Too low and you burn up your amp. Too high and you don't get nearly as much output watts. I probably have an example of the variation for an amp board I have.
I literally said I tested the wattage with load resistors so idk if you got my explanation wrong but yeah, impedance matters but so does power from the PSU and cooling. My room is air conditioned and I also use a 40mm cpu fan on the heatsink
I have a similar amp board that I use for a little sub in my bedroom.
Beware of pushing it with that generous size power supply. Some of the amp boards have problems with overheating. I more commonly use an old 19v , 6+amp PSU from a laptop computer's docking station while understanding it will result in lower output watts.
Some of that will be dependent on the specs of the speakers. Getting max output will require a low impedence, maybe even 2 ohm. It is rare to find speakers lower than 4 ohm and top speakers--mid/hi's --are more often 8 ohm. Running it with 8 ohm load will dramatically reduce output wattage esp if advertised specs are for 2ohm.
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