Hi folks,
I am considering finding an alternative to a TDA7498E board that I have used for almost 8 months now, because I am getting sick of the low bass issue that the board has. As youtuber Willison audio pointed out, he said that there was weak bass and I agree with him. When I switched from a Class AB TDA7379 amplifier to this one (as the chip blew), using the same speakers it sounded like there is a high pass filter at around 80hz, making the bass seem weak.
I used TI based amp boards (like the tpa3110 and tpa3116), and they all have this power on/off pop that really annoys me (especially with having 92Db sensitivity speakers). I heard that the issue is even worse with the tpa3255 amp (likely due to a higher voltage).
Any ideas on what boards/chips are good? The speakers previously described were some small 3D printed speakers that were low sensitivity and were 4 ohms. The speakers I use now are JBL control 28s and they are rated 87W pink noise and 175W continuous program power and they are 8 Ohms, demanding more power. I am thinking about getting the wondom audio AA-AB32516 or a board based off the IR2092, but the 2092 requires a dual symmetrical power supply that might cost alot. Any suggestions?
I am considering finding an alternative to a TDA7498E board that I have used for almost 8 months now, because I am getting sick of the low bass issue that the board has. As youtuber Willison audio pointed out, he said that there was weak bass and I agree with him. When I switched from a Class AB TDA7379 amplifier to this one (as the chip blew), using the same speakers it sounded like there is a high pass filter at around 80hz, making the bass seem weak.
I used TI based amp boards (like the tpa3110 and tpa3116), and they all have this power on/off pop that really annoys me (especially with having 92Db sensitivity speakers). I heard that the issue is even worse with the tpa3255 amp (likely due to a higher voltage).
Any ideas on what boards/chips are good? The speakers previously described were some small 3D printed speakers that were low sensitivity and were 4 ohms. The speakers I use now are JBL control 28s and they are rated 87W pink noise and 175W continuous program power and they are 8 Ohms, demanding more power. I am thinking about getting the wondom audio AA-AB32516 or a board based off the IR2092, but the 2092 requires a dual symmetrical power supply that might cost alot. Any suggestions?
Last edited:
TDA8932 has amongst the best bass of any chipamp I've heard (MA12070 might just beat it, not sure). Its very clean on power up/down and only needs a single rail.
Into 8R running BTL you can probably get in the region of 35W from it, playing music.
Into 8R running BTL you can probably get in the region of 35W from it, playing music.
Great suggestions, I have heard that the TDA8932 is a chipamp that sounds quite good but I have never heard about the MA12070 before but I'll take that into consideration. Is there a more powerful version of the TDA8932 that supports putting out at least 100W into 8Ohms?
I only wish there was. If it does exist, I haven't found it. I'm working on my own design to get that kind of power without sacrificing the good sound of the TDA8932.
hi, what about the whistling?
I had a card based on the TDA8950, its big brother, the pcb was not terrible I agree.
Do you have any TDA8932 PCBs to recommend to us??
I must be missing some context, what whistling?
I have no experience with that part. I think it needs a split supply though.
Here's my design based on TDA8932, if you need the up to date gerbers drop me a PM. We're up to rev5 now I think.
Yeah I have also been considering about the TDA8950, what is the output power at 8 Ohms? NXP does not list it out in their datasheet, except saying it outputs 300W into 8Ohms when bridged. Also I am quite worried that the output filters are tuned for 4 ohms and may have nasty distortion at 8 ohms as it was not tuned for that.
Filters tuned for different impedances won't in general add distortion but they'll either ring (resonate) when used on higher impedances or droop when used with lower impedance. To retune a 4ohm filter for 8 ohms just double the inductor values (e.g. 15uH to 33uH) and halve the cap values.