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NAD 216 THX - Make it sound better?
NAD 216 THX - Make it sound better?
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Old 15th October 2017, 07:15 PM   #21
Ejje is offline Ejje  Sweden
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Originally Posted by spiderman62 View Post
I have bought recently a couple of this amps. 216 THX and open one of them for checking the caps since this is a simple way of making improvments. I was surprise to find out quite good Nichicon all the way on the power supply part of the amp.
I have measured them with quite good results. ERS = 0.11 and with good values close to what it should be originally. However I have found better caps (for replacing 4700 uF caps only) at Mouser electronics for incresing the capacitanse to 22 mF and decreasing ESR to. 0.03. No bad Elcos at all were found in these amps. Any one who knows if it was any improvement from early modells?
Tjena! What was the kind of caps did you found on mouser? I'm also thinking about changing on my 216. But I wonder if there is any downside if changing to larger caps or could one change to largest/lowest esr without problem?
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Old 16th October 2017, 01:07 PM   #22
spiderman62 is offline spiderman62  Sweden
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Well. According to the design they are connected in parallell and they can be replace just with one cap per cahnnel. It will be as other older amps with one big cap/channel. There are some people to have replaced with just 2 caps.
I have found these ESMH800VRT223MB80T United Chemi-Con | Mouser Sverige
Ofcourse you have to do some simpel wiring in order to connect them, but is an easy way to do. do you also have Nichicon in your amp?
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Old 16th October 2017, 07:26 PM   #23
spiderman62 is offline spiderman62  Sweden
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Originally Posted by spiderman62 View Post
Well. According to the design they are connected in parallell and they can be replace just with one cap per channel. It will be as other older amps with one big cap/channel. There are some people who have replaced with just 2 caps. per channel.
I have found these ESMH800VRT223MB80T United Chemi-Con | Mouser Sverige
Ofcourse you have to do some simpel wiring in order to connect them, but is an easy thing to do. do you also have Nichicon in your amp?
However I have measure these 3 Nichicons LK (M) 4700 uF to have a capacitance - together all 3 - of 13.2 mF and 13.5 mF for left and right channel. So increasing to 22 mF will be an improvement. I will update the values of the new caps. as soon as they arrive and I have measured them individually.

Last edited by spiderman62; 16th October 2017 at 07:33 PM.
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Old 19th October 2017, 09:03 PM   #24
Ejje is offline Ejje  Sweden
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Join Date: Nov 2016
Quote:
Originally Posted by spiderman62 View Post
Well. According to the design they are connected in parallell and they can be replace just with one cap per cahnnel. It will be as other older amps with one big cap/channel. There are some people to have replaced with just 2 caps.
I have found these ESMH800VRT223MB80T United Chemi-Con | Mouser Sverige
Ofcourse you have to do some simpel wiring in order to connect them, but is an easy way to do. do you also have Nichicon in your amp?
Sorry for the slow response, havent had much time to open the amp up. It's nichicon caps in mine as well. 25mm in diameter, 80V, 4700uF.

Haven't had a look under the pcb for how the wiring could be done(and probably wont start recapping until my Honey Badger build is complete). Your plan is to change the 6 small ones for 2 big as these other people has done if i understand correctly?

/Ejje
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Old 21st October 2017, 06:47 PM   #25
spiderman62 is offline spiderman62  Sweden
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Originally Posted by Ejje View Post
Sorry for the slow response, havent had much time to open the amp up. It's nichicon caps in mine as well. 25mm in diameter, 80V, 4700uF.

Haven't had a look under the pcb for how the wiring could be done(and probably wont start recapping until my Honey Badger build is complete). Your plan is to change the 6 small ones for 2 big as these other people has done if i understand correctly?

/Ejje
Well, other people have replaced 6 caps with 4 pcs. 11 mF caps.
So I do not know if someone have tried with just 2 big caps. However I have done this now and something went wrong and the amp. is not clicking on. I did replace back the old ones and still not clicking on. I have no idea yet what went wrong. The polarity was never inverted or something like that. I am sure that this should work. Vi hörs!
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Old 21st October 2017, 08:46 PM   #26
Ejje is offline Ejje  Sweden
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Originally Posted by spiderman62 View Post
Well, other people have replaced 6 caps with 4 pcs. 11 mF caps.
So I do not know if someone have tried with just 2 big caps. However I have done this now and something went wrong and the amp. is not clicking on. I did replace back the old ones and still not clicking on. I have no idea yet what went wrong. The polarity was never inverted or something like that. I am sure that this should work. Vi hörs!
Hmm.. thats to bad. So you installed the caps you linked earlier? Maybe it's the speaker relay if it's the original? Have you checked the other caps for bulging tops or burned marks around resistors? I know I read about some resistors that often becomes faulty, I'm gonna try to find it again.

I'm very curious about the fit of the new caps. Any chance of pictures of them?

Last edited by Ejje; 21st October 2017 at 08:58 PM.
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Old 21st October 2017, 09:05 PM   #27
spiderman62 is offline spiderman62  Sweden
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Originally Posted by Ejje View Post
Hmm.. thats to bad. So you installed the caps you linked earlier? Maybe it's the speaker relay if it's the original? Have you checked the other caps for bulging tops or burned marks around resistors? I know I read about some resistors that often becomes faulty, I'm gonna try to find it again.

I'm very curious about the for of the new caps. Any chance of pictures of them?
Yes, It was that caps I hade linked to earlier and they were measure to have an ESR of 0.01 ohm. It seems to be the relay that is not clicking any longer. I read something about resistors going bad, but I don't see any looking bad or faulty. However I will start to measure them.
IMG_20171021_230105.jpg
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Old 8th November 2017, 06:22 PM   #28
spiderman62 is offline spiderman62  Sweden
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Originally Posted by spiderman62 View Post
Yes, It was that caps I hade linked to earlier and they were measure to have an ESR of 0.01 ohm. It seems to be the relay that is not clicking any longer. I read something about resistors going bad, but I don't see any looking bad or faulty. However I will start to measure them.
Attachment 641480
Now I have changed the caps on my second amplifier. With the ones mentioned before.
The sound is now cleaner and more clear. Diana Krall is now singing closer and sounrounding me more than before.
I can only say that I highly recommend this upgrade.
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Old 8th November 2017, 06:29 PM   #29
Ejje is offline Ejje  Sweden
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Originally Posted by spiderman62 View Post
Now I have changed the caps on my second amplifier. With the ones mentioned before.
The sound is now cleaner and more clear. Diana Krall is now singing closer and sounrounding me more than before.
I can only say that I highly recommend this upgrade.
Sounds awesome! Any improvements in the lower registers? So let me get this straight, you removed all 6 original caps? And then put 2 of the big 22mF caps in? Was it a clean fit or did you do any special wiring?
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Old 8th November 2017, 06:59 PM   #30
spiderman62 is offline spiderman62  Sweden
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Originally Posted by Ejje View Post
Sounds awesome! Any improvements in the lower registers? So let me get this straight, you removed all 6 original caps? And then put 2 of the big 22mF caps in? Was it a clean fit or did you do any special wiring?
Yes, I did change 6 caps with only 2 big 22 mF each. The improvements are in all frequencies. But it was more audible for me from ~300 Hz to 30 Khz since I drive my speakers with 2 amps. A NAD C272 for the Woofers and 216 THX for the midrange and treble. I have now tested the whole register and an improvement in the lower frequencies are also audible.
I had to make a very simpel wiring from the new cap to just one of the inputs from the old cap.
I could do this since the old 3 caps were connected in paralell. I used 4 wires, but you can also make it with just 3 wires if you conect the 2 caps in serie. Since the power supply delivers + /- 67 Volts.
I think my moded 216 THX sounds better than my C272 now.
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