Of course I would not do that,fresh oil is the cheapest warranty avoiding wear on engine and turbo etc..
Ok,that explainded more,I do not want a heavier load,I want less load on the amp. I thinked about trying PBTL 7498e,one for each voicecoil and only one with series voicecoils versus dual TPA3116d2,one on each voicecoil. Don't think it's worth trying one3116 and serie voicecoils since it has less watts.. Thank you again,I am little slow or just unexperienced. Or just interested in the hows and the whys ;-)
But they have not arrived yet. So it will be a fun experience to check this out
Ok,that explainded more,I do not want a heavier load,I want less load on the amp. I thinked about trying PBTL 7498e,one for each voicecoil and only one with series voicecoils versus dual TPA3116d2,one on each voicecoil. Don't think it's worth trying one3116 and serie voicecoils since it has less watts.. Thank you again,I am little slow or just unexperienced. Or just interested in the hows and the whys ;-)
But they have not arrived yet. So it will be a fun experience to check this out
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Wait and see if Sanwu provides a reply.
Sometimes, we as engineers are faced with a situation where the theory indicates a "probably not", the gut-feeling indicates a "no" but we are asked "but what will go wrong?". Then, we have the dilemma of not being able to point at unambiguous detrimental results.
My gut-feeling (one again) is that you will never experience better performance in practice from the parallel filter than from the single filter. Most likely you will not notice the difference. But, the single filter is the lightest to operate for the chip.
May the sunny and warm weather here reach the Norwegian coast,
FF
Sometimes, we as engineers are faced with a situation where the theory indicates a "probably not", the gut-feeling indicates a "no" but we are asked "but what will go wrong?". Then, we have the dilemma of not being able to point at unambiguous detrimental results.
My gut-feeling (one again) is that you will never experience better performance in practice from the parallel filter than from the single filter. Most likely you will not notice the difference. But, the single filter is the lightest to operate for the chip.
May the sunny and warm weather here reach the Norwegian coast,
FF
Hello again Received the Sanwu TDA7498e amplifiers today and installed one in PBTL mode with voicecoils in series,it works very well,kicks ***. It have 30volts now,same as the same amplifier that burnt had in stereomode and half the impedance. I removed the output chokes on the unused channel. I should try different voltages,but I would think it would last with this parallell mode and double impedance. I really like the kick in the midbass now,as far as I remember this is how it sounded in stereomode with one channel on each VC
Received the Sanwu TDA7498e amplifiers today and installed one in PBTL mode with voicecoils in series,it works very well,kicks ***. It have 30volts now,same as the same amplifier that burnt had in stereomode and half the impedance. I removed the output chokes on the unused channel. I should try different voltages,but I would think it would last with this parallell mode and double impedance. I really like the kick in the midbass now,as far as I remember this is how it sounded in stereomode with one channel on each VC Hello again
fine to read about your success...have you any pics for us?
Well done. Motorhead will be pleased. You can quickly arrange the mess - you have light all 24 hours now
Now I have tested TPA3116d2. This one DC 12V 24V 100W TPA3116 D2 DA Mono Channel Digital Power Audio Amplifier Board | eBay
First I removed the 7498e and replaced it with one one 3116d2. Yes,it worked and worked well but it's not enough when there's much fast bassplaying,it hits the wall at high volume. So I installed one for each voice coil,holy crap,this kicks ***. Seems like 3116d2 likes 2 ohm. Found out that my "sub" is dual 2ohm,not 2,7ohm. I bought this 3116d2 pairs and another pairs at double the price but they where no good,highpass effect,no low bass,found a test on youtube that confirmed my thaughts. There was a mod I will try in the video.. YouTube
First I removed the 7498e and replaced it with one one 3116d2. Yes,it worked and worked well but it's not enough when there's much fast bassplaying,it hits the wall at high volume. So I installed one for each voice coil,holy crap,this kicks ***. Seems like 3116d2 likes 2 ohm. Found out that my "sub" is dual 2ohm,not 2,7ohm. I bought this 3116d2 pairs and another pairs at double the price but they where no good,highpass effect,no low bass,found a test on youtube that confirmed my thaughts. There was a mod I will try in the video.. YouTube
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This does not have hipass, does not have opamp. Simple, works.
I tried the mod in this video but sound was intermittent, i had to re-put one of the two 1uF capacitors in place( the one on the right), then i've done the same on another board, very similar, the XH-M545. Very similar but they react a little different to capacitors and the hipass is a little different too, XH-M545 seems better in the hipass (lower hipass) but is more noisy changing voltages, 20.2V seems ok.
I used a 10uF cap on the red one and 6.8uF on the XH-M545.
Hello,
I have purchased a red TDA 7498e board and want to use it for driving a JBL stage 1210 subwoofer. Power supply will have 36 V and 10 A.
Could you recommend a possible connection? Is it recommended use in BTL as descriped on to the board (j1,j2,j3 and j4 linked)?
Thank you for help in advance.
I have purchased a red TDA 7498e board and want to use it for driving a JBL stage 1210 subwoofer. Power supply will have 36 V and 10 A.
Could you recommend a possible connection? Is it recommended use in BTL as descriped on to the board (j1,j2,j3 and j4 linked)?
Thank you for help in advance.
Hello! This is the board I have bought:
1X(TDA7498E 2X160W Dual Channel Audio Amplifier Board, Support BTL Mode 1X2 K3A2 | eBay
I do not know what is the difference between BTL and PBTL because I'm not specialist in this topic, I just want to built a cool boombox and need a small help
Impedance of this speaker is 4 ohm.
Hi Sera,
I have the same board and I am pleased with it.
BTL means you have two outputs per speaker operating in counter-phase such that you effectively double the voltage. PBTL (Parallel Bridge Tied Load) means you connect two speaker outputs to operate in parallel such that the output theoretically can handle double the current.
If you do nothing with that board, it operates BTL on both (stereo) outputs. When you connect the jumpers, you turn it into a mono-board handling low impedance loads.
With a 4 Ohm speaker, it is a good idea to couple the board for PBTL. I haven't tried but other members have done it with success.
Are the connections clear to you?
I have the same board and I am pleased with it.
BTL means you have two outputs per speaker operating in counter-phase such that you effectively double the voltage. PBTL (Parallel Bridge Tied Load) means you connect two speaker outputs to operate in parallel such that the output theoretically can handle double the current.
If you do nothing with that board, it operates BTL on both (stereo) outputs. When you connect the jumpers, you turn it into a mono-board handling low impedance loads.
With a 4 Ohm speaker, it is a good idea to couple the board for PBTL. I haven't tried but other members have done it with success.
Are the connections clear to you?
Dear FauxFrench,
thank you very much for detailed, valuable informations.
As I mentioned I'm not an expert so what you have written is a little bit chinese
If I well understand, PBT is the best solution for me, but I need to connect the 4 jumpers?
And use only the marked input (only 1 RCA) and one of two outputs to speaker?
thank you very much for detailed, valuable informations.
As I mentioned I'm not an expert so what you have written is a little bit chinese
If I well understand, PBT is the best solution for me, but I need to connect the 4 jumpers?
And use only the marked input (only 1 RCA) and one of two outputs to speaker?
Dear FauxFrench,
thank you very much for detailed, valuable informations.
As I mentioned I'm not an expert so what you have written is a little bit chinese
If I well understand, PBT is the best solution for me, but I need to connect the 4 jumpers?
And use only the marked input (only 1 RCA) and one of two outputs to speaker?
Yes according to what is written for the board, the 4 jumpers have to be mounted. You use the white RCA for input (L) and one of the outputs for the speaker.
NB: Do a quick test with a cheap speaker before connecting the JBL.
Good luck!
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No, it will very likely end as you want.
In case there is a problem and you have DC at the output, checking first with a cheap speaker takes 5 minutes and reduces the risk of damaging the JBL to very low. We, the more experienced DIY'er (always) do like that.
Should there unexpectedly be a problem, you worst case damage a 14 Eur amplifier. Putting a 200 Eur JBL at risk for saving 5 minutes is hardly worth it. We have cheap experimental speakers and the good speakers are only connected when we are sure.
My "Good luck!" was without sarcasm and only wishing your project well.
In case there is a problem and you have DC at the output, checking first with a cheap speaker takes 5 minutes and reduces the risk of damaging the JBL to very low. We, the more experienced DIY'er (always) do like that.
Should there unexpectedly be a problem, you worst case damage a 14 Eur amplifier. Putting a 200 Eur JBL at risk for saving 5 minutes is hardly worth it. We have cheap experimental speakers and the good speakers are only connected when we are sure.
My "Good luck!" was without sarcasm and only wishing your project well.