Hello,
I have a 6.5 inch 8 Ohm sub woofer driver rated for around 70 watts rms. I need a decent amplifier to run it and wanted to know if TDA 7498 board could be used for it. The board has 2 channels rated for 100 watts each at 6 ohms load on 24 volts DC. Is it possible to bridge the 2 channels or use them in parallel? I might upgrade the sub woofer to 8 inch so I would need more than 100 watts on a channel. Thanks
I have a 6.5 inch 8 Ohm sub woofer driver rated for around 70 watts rms. I need a decent amplifier to run it and wanted to know if TDA 7498 board could be used for it. The board has 2 channels rated for 100 watts each at 6 ohms load on 24 volts DC. Is it possible to bridge the 2 channels or use them in parallel? I might upgrade the sub woofer to 8 inch so I would need more than 100 watts on a channel. Thanks
That would only give you more power on lower impedances. If it stays at 6 or 8 Ohm, nothing changes power wise.
If you bridge them you get twice the voltage swing.
But you need a phase splitting bridge circuit on the front end of your amps.
But you need a phase splitting bridge circuit on the front end of your amps.
Oh well thats sad. Could you suggest any other amp that I can use with my Subwoofer? I need around 70 watts rms of clean power.
Thanks for the replies. I feel like TDA 7498 is not a good choice for powering a subwoofer. Can anyone suggest an appropriate amp for 70 watts of clean rms power?
Why not a mono TDA7498?
YJ TDA7498 150W 4ohm Mono Class D Subwoofer power amplifier Completed board Ste | eBay
YJ TDA7498 150W 4ohm Mono Class D Subwoofer power amplifier Completed board Ste | eBay
The cheapest mono TDA7498 I could find costs $12.50 on Aliexpress.
But thats like almost half of my total budget. The dual channel board costs $8. It is possible to convert the dual channel board to mono channel?
But thats like almost half of my total budget. The dual channel board costs $8. It is possible to convert the dual channel board to mono channel?
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The thing is I have Altec Lansing MX6021 speaker set whose amp is useless for me as the remote is not working and the speakers wont even turn on without it. There is no replacement for the remote either so I have to replace the whole amp system and was searching for components to do it. I need the cheapest solution with good SQ. The only thing I need more is an amp for subwoofer and I dont want to use TDA7293 as it is class AB amp. Here is the cart.
Your AliExpress shopping cart - Buy directly from China
Your AliExpress shopping cart - Buy directly from China
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If you're on a budget, perhaps a mono TPA3116 will suit?
DC 12V-24V TPA3116 Mono Channel Digital Power Audio Amplifier Board BTL Out K | eBay
DC 12V-24V TPA3116 Mono Channel Digital Power Audio Amplifier Board BTL Out K | eBay
TPA3116 was my first choice but I found that it does not provide much power at 8 ohm load. I only puts out like 35 watts rms at 8 ohms
He wants to parallel bridge them. And that, in fact, does not increase the power at all unless you get into a that low impedance range a single one can't handle the current.
You are talking about the 'traditional' bridging. That, however, does not work either because the TDA7498 is already bridged, the IC consists of 2 BTL channels. Best hint for it (after the datasheet) is that there are no TDA7498-200W-mono-boards.
These are parallel bridged but do not provide more power, rather the opposite, these are also parallel bridge tied (PBTL), which only gives you more power on lower impedances.
Exactly. The TDA7498E boards don't deliver more power on 8 Ohm either btw.
For a subwoofer the L15D or other IRS2092S amps are quite nice. It got much higher power at 8 Ohm but the downside is, you need a symmetrical power supply, so that is often not ideal or even possible for mobile or car use. Sure/Wondom got also some different amplifier concepts on their different boards, i.e. the STA516BE tripath series, these work single ended but are noticable more expensive than the TDA7498 boards.
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