We have two places. In one place the C298 drives a pair of Revel F228Be and at the other place a pair of MA Gold200. The rooms are medium-sized and we are sitting 4 meter from the speakers. There is no distortion even at high volume.
-
WANTED: Happy members who like to discuss audio and other topics related to our interest. Desire to learn and share knowledge of science required. There are many reviews of audio hardware and expert members to help answer your questions. Click here to have your audio equipment measured for free!
NAD C 298 Power Amplifier With Purifi Eigentakt Amplification
- Joined
- Dec 15, 2019
- Messages
- 528
- Likes
- 942
Let me add this:
The NAD C 298 is drab like a marble funeral urn. I just got a used on and it was scuffed along the top front edge. I sanded that edge carefully in preparation of repainting it to cover the scuffing. Right now the top edge is bare metal--a fine edge of bare metal, maybe one-eight inch of bare metal on the vertical front, and one-eighth inch along the adjoining horizontal top front, all across the front top. That little bit of exposed metal makes the entire front of the NAD C 298 much more attractive. It gives the box spatial definition. It works and it is a subtle change. See photos...there's a bright metal edge to the top of the NAD amp.
The NAD C 298 is drab like a marble funeral urn. I just got a used on and it was scuffed along the top front edge. I sanded that edge carefully in preparation of repainting it to cover the scuffing. Right now the top edge is bare metal--a fine edge of bare metal, maybe one-eight inch of bare metal on the vertical front, and one-eighth inch along the adjoining horizontal top front, all across the front top. That little bit of exposed metal makes the entire front of the NAD C 298 much more attractive. It gives the box spatial definition. It works and it is a subtle change. See photos...there's a bright metal edge to the top of the NAD amp.
Attachments
Last edited:
I just got a brand new NAD C 298 unit. I am very pleased with the sound, it's a big upgrade from my previous amp.
The speakers are super silent with this amp attached, no noise in the audio-section at all. However my unit's power supply also makes this humming sound. You can clearly hear it even 5 feet away. I think this is the same thing that others have observed as well. To be clear: this noise does not come from the speakers, it comes from the unit itself (probably the power supply).
So the big question is: there were other people in this thread talking about having their unit serviced because of the buzzing/humming sound. How did this turn out? Has it actually been fixed?
Note: My unit's firmware is v3.4, so I guess this is a pretty new batch.
The speakers are super silent with this amp attached, no noise in the audio-section at all. However my unit's power supply also makes this humming sound. You can clearly hear it even 5 feet away. I think this is the same thing that others have observed as well. To be clear: this noise does not come from the speakers, it comes from the unit itself (probably the power supply).
So the big question is: there were other people in this thread talking about having their unit serviced because of the buzzing/humming sound. How did this turn out? Has it actually been fixed?
Note: My unit's firmware is v3.4, so I guess this is a pretty new batch.
Tovarich007
Active Member
- Joined
- Jan 31, 2021
- Messages
- 236
- Likes
- 319
Why not. it's a matter of taste.
Classic NAD style is quite austere indeed, I like that personnaly.
Anyone know if the heatsinks are just directly screwed into the bottom of the case using these holes (assuming they're mirrored on the bottom and threaded there but not sure).
Also curious about the type of metal they're using for the AC shielding and if there is a practical reason/advantage assuming the SMPS is well-designed and implemented.
Thanks!
Also curious about the type of metal they're using for the AC shielding and if there is a practical reason/advantage assuming the SMPS is well-designed and implemented.
Thanks!
Last edited:
Auto sense at times failed to turn on the left channel with my C298. Not a huge deal, it was fairly rare. Last week though my left channel cut out while the amp was still on. Power cycling fixed it.
It happened a few more times from last week. And today the left channel stopped working multiple times, and it would take multiple power cycles to get it working. Then it would fail again within a few minutes.
I think it's RIP for the NAD here.
If it is out of warranty, contact Peter Williams at Quirk Audio to see if he can help. He’s an NAD repair expert.
I found, it is related with the input level.
sadoMasupilami
Member
- Joined
- Jan 1, 2023
- Messages
- 12
- Likes
- 7
I had that once but it did not happen a second time. I really hope it will not happen again. If that is the case I will try changing sensing level.
Mine also has some whining from the device but only if I am with my ear directly above the enclosure. I am a little bit bothered by that but I’m reality it is not audible from where I am listening. I bought it because I got a good deal on a half year old unit.
It is 2 months out of warranty, and I appreciate the advice.
To be clear for everyone, my left channel started to stop working even with auto sense off. A power cycle would get the left channel working again...but then the left channel has been stopping more and more often. And power cycling fixing the issue less and less.
Its unplugged now, I will try it again this weekend, maybe try RCA instead of XLR or anything else I can think of.
make sure it is not your pre, you could swap the left and right inputs.
i think NAD's power saving implementation is a bit questionable and may impact reliability long term. i had to get my M22 fixed once. when i got it back i disabled all power saving features, and it's been reliable since. ...oh and that touch button implementation is pure on-off roulette 
Agreed. I killed the touch button on the first NAD I reviewed and, in general, I prefer manual on-off implemented by 12v trigger.i think NAD's power saving implementation is a bit questionable and may impact reliability long term. i had to get my M22 fixed once. when i got it back i disabled all power saving features, and it's been reliable since. ...oh and that touch button implementation is pure on-off roulette
After the audio shop telling me the product was out of warranty (they pulled up the wrong online order and started the RMA for the wrong product) they have now taking it back for analaysis. I am hoping they will honour the 2yr warranty as the RMA was raised in the time period.
Did anyone with a repaired or service C298 ever find out what was wrong with it? Did the same unit come back repaired? Was it fixed through firmware?
The engineer said that they sometimes just put varnish on noisy components...is that a thing?
Fingers crossed.
Did anyone with a repaired or service C298 ever find out what was wrong with it? Did the same unit come back repaired? Was it fixed through firmware?
The engineer said that they sometimes just put varnish on noisy components...is that a thing?
Fingers crossed.
From the repair centre.
"After assessment our engineer has filled the choke in the PSU with a sealant as per the service bulletin provided by NAD. He did remark that your C298 was one of the worst we’ve seen for this problem, and likely was manufactured before they started using silicone on this part during assembly. There will be nothing to pay for this service."
Being posted back so we'll see if it worked.
"After assessment our engineer has filled the choke in the PSU with a sealant as per the service bulletin provided by NAD. He did remark that your C298 was one of the worst we’ve seen for this problem, and likely was manufactured before they started using silicone on this part during assembly. There will be nothing to pay for this service."
Being posted back so we'll see if it worked.
a follow on email from the repair centre..."As suggested earlier I don’t think you can completely eliminate the noise due to the nature of the power supply, but it’s significantly dampened by the sealant so should no longer be audible outside of very quiet environments."
How does signal to noise ratio effect a product if there is physical noise?
How does signal to noise ratio effect a product if there is physical noise?
pogo
Major Contributor
- Joined
- Sep 4, 2020
- Messages
- 2,041
- Likes
- 762
Noise is always physical. There is also a real world that plays a role and does not end at an amplifier output
It's back from being repaired. It is dead silent from listening position, if you get within a few inches/or press your ear to the unit there is still an oscillating/hum.
But it is much better than before. I can for sure live with it!.
Can anyone else who has one put their ear to it and see if there has this now small issue.
But it is much better than before. I can for sure live with it!.
Can anyone else who has one put their ear to it and see if there has this now small issue.
Similar threads
- Poll
