heliumflight
Well-Known Member
I am currently using Nad D3020 with Vintage Sony Apm 717, simply brilliant combability, but with Totem Rainmaker not good.
NAD OWNERS THREAD
- Thread starter Kumar442244
- Start date
heliumflight
Well-Known Member
This is what I have.
Harsh - +91 98210 45573
reubensm
Well-Known Member
Not sure if I mentioned this previously but the South Asian gentleman featured in the video is none other than Taresh Vadgama, Vice President - Development & Manufacturing at Lenbrook. He is an old timer from Canada, and has been with Lenbrook for around 40 years. It is Lenbrook that owns the NAD, Bluesound and PSB brands.
reubensm
Well-Known Member
Sometimes folks who are no way connected to us, make a difference to our lives. This gentleman's work has made a significant contribution to my life by giving me hours and hours of happiness. An often forgotten name amoung the legends of the world of HiFi, Mr. BEE himself.
Talk about end-games, final frontiers and 'the end' - that's NAD for me!
Talk about end-games, final frontiers and 'the end' - that's NAD for me!
PCA
Active Member
Thank you very much for this information. Cheers!
Many things went over my head. I will sent you a PM as my NAD356 is having some issueThought I'll share a fix with all.
Recently a NAD S200 Silverline series power amplifier came to me for repairs with a unique problem. At low volumes, the right channel kept cutting out intermittently. However, the amplifier functioned normally the moment the volume control on its S100 preamp was turned up, past the 9 o'clock position. When the amp was playing with volume below 9 o'clock position, music kept crackling on and off, and whenever the sound came up, the volume was lower than the left channel causing channel imbalance. The amp had been to a couple of technicians before coming to me, input sockets (both RCA and XLRs) had been cleaned and the input selector (balanced vs unbalanced), the soft clipping and bridged mode switches had been cleaned and lubricated. All these had been resoldered on the input section PCB as well, thereby eliminating dry solder. Some electrolytics in the input circuit and on the right channel power amplifier board had been changed. Both techs had diagnosed it as a electrolytic problem and professed - when played at high volume, the capacitors charge up and the problem disappears
Ran some basic checks and isolated the fault. It was the right channel speaker relay (this model has separate relays for each channel). It was switching properly but the switching contacts were apparently not making good enough contact inside, causing the issue. Added a long wire jumper across the speaker switching pins of the relay for testing purposes, switched on the amp allowing the relay to turn on and then by closing and opening the jumper, was able to demonstrate that the relay switching, was with intermittent contact. Removed the testing jumper and replaced the old relay with a new 48volt 16amp SPST relay. The amp started working perfectly after that.
Caution: Never attempt to add jumpers or mods to the protection relays in amplifiers unless one has a complete understanding of the circuit design, relay types and relay pinouts. Never attempt to bypass a relay as this piece of electronics is an essential part of the amplifier's self-protection system. Replace the faulty relay with an identical replacement type. If using a substitute or an alternate relay type, pay attention to the relay pinout.
greendream
Member
This is a wonderful thread. I am looking to purchase an used Nad c320. The dual advantage of using as a stereo amplifier and power amplifier for home theatre, interests me.
Has anyone been using their Nad amplifier as power amplifier in home theatre? Please state your experience.
Special thanks to @reubensm for passionate posts regarding Nad.
Anyone is planning to sell their Nad amplifier, kindly DM me.
Has anyone been using their Nad amplifier as power amplifier in home theatre? Please state your experience.
Special thanks to @reubensm for passionate posts regarding Nad.
Anyone is planning to sell their Nad amplifier, kindly DM me.
I used the 320 as a power amplifier before; they are pretty nice for bookshelves. But currently, I am using it as a preamp in my stereo setup. I have observed that it is not good at preamplifying, but as an amplifier, it is very good. If you are using tower speakers, it may struggle.
reubensm
Well-Known Member
when a legend meets another - AR XA and NAD 3020
reubensm
Well-Known Member
50 years of PSB Speakers from Lenbrook, also the home of NAD and Bluesound
Greetings. I have recently joined this forum and looking for some advice. I have a NAD C 356BEE Integrated Amplifier. Recently it has started acting up. It powers on and then switches to standby. I first thought that one of the connected speakers had shorted. But same problem is there with the speakers disconnected. Could you help with some suggestions. There seems to be no NAD service centre in India.Thought I'll share a fix with all.
Recently a NAD S200 Silverline series power amplifier came to me for repairs with a unique problem. At low volumes, the right channel kept cutting out intermittently. However, the amplifier functioned normally the moment the volume control on its S100 preamp was turned up, past the 9 o'clock position. When the amp was playing with volume below 9 o'clock position, music kept crackling on and off, and whenever the sound came up, the volume was lower than the left channel causing channel imbalance. The amp had been to a couple of technicians before coming to me, input sockets (both RCA and XLRs) had been cleaned and the input selector (balanced vs unbalanced), the soft clipping and bridged mode switches had been cleaned and lubricated. All these had been resoldered on the input section PCB as well, thereby eliminating dry solder. Some electrolytics in the input circuit and on the right channel power amplifier board had been changed. Both techs had diagnosed it as a electrolytic problem and professed - when played at high volume, the capacitors charge up and the problem disappears
Ran some basic checks and isolated the fault. It was the right channel speaker relay (this model has separate relays for each channel). It was switching properly but the switching contacts were apparently not making good enough contact inside, causing the issue. Added a long wire jumper across the speaker switching pins of the relay for testing purposes, switched on the amp allowing the relay to turn on and then by closing and opening the jumper, was able to demonstrate that the relay switching, was with intermittent contact. Removed the testing jumper and replaced the old relay with a new 48volt 16amp SPST relay. The amp started working perfectly after that.
Caution: Never attempt to add jumpers or mods to the protection relays in amplifiers unless one has a complete understanding of the circuit design, relay types and relay pinouts. Never attempt to bypass a relay as this piece of electronics is an essential part of the amplifier's self-protection system. Replace the faulty relay with an identical replacement type. If using a substitute or an alternate relay type, pay attention to the relay pinout.
availlyrics
Well-Known Member
- Joined
- Sep 26, 2011
- Messages
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Lakozy ,
La Kozy Mansion
Address: Showroom No:3, 21, Chowpatty Seaface, Sea Face, Gamdevi, Mumbai, Maharashtra 400007
I had purchased C352 from them , back in 2004. Some dry solder and bad balance pot issues had cropped up after 5y . At that time they quoted 350 inspection charges + parts. Ended up doing DIY repairs myself, with the help of service manual ( not the user manual). If you are comfortable , you too can attempt its repairs. Usually the burnt out resistors, capacitors and voltage regulation transistors are the culprits due to overheating. PCB tracks peel off with heatsink getting unsoldered, in case of worst case heat buildup (stacked rack system). Probably, in your case, its in protection mode due to exccesive DC in signal path.
La Kozy Mansion
Address: Showroom No:3, 21, Chowpatty Seaface, Sea Face, Gamdevi, Mumbai, Maharashtra 400007
I had purchased C352 from them , back in 2004. Some dry solder and bad balance pot issues had cropped up after 5y . At that time they quoted 350 inspection charges + parts. Ended up doing DIY repairs myself, with the help of service manual ( not the user manual). If you are comfortable , you too can attempt its repairs. Usually the burnt out resistors, capacitors and voltage regulation transistors are the culprits due to overheating. PCB tracks peel off with heatsink getting unsoldered, in case of worst case heat buildup (stacked rack system). Probably, in your case, its in protection mode due to exccesive DC in signal path.
Last edited:
reignofchaos
Well-Known Member
Lakozy doesn't deal with NAD anymore. NAD is represented directly by their representative - Mr Harsh Merchant in India and he has service support sorted. His number is available on the lenbrook/NAD website.
reubensm
Well-Known Member
This issue can be caused by multiple reasons so the amplifier will require a detailed investigation. My personal opinion is that the focus should not just be to fix the fault but the amplifier should be thoroughly checked. After the potential root cause is identified and addressed, the amp will also need a calibration check. All this sounds scary but it is actually not. Someone who is trained for the job should be able to fix it easily. Before giving the amp to anyone, check if they have experience with repairing NAD amplifiers before. The circuit design philosophy in NAD amps is slightly different and someone familiar would not need to spend time looking around.
Common 'internal' causes for NAD amps to go into protection mode:
1) dry solder, solder joint failure
2) faulty filter capacitors or power supply components
3) burnt capacitors, resistors and semiconductors (especially near components that run hot)
4) faulty protection circuit IC
5) bias and dc offset going out of spec
6) speaker relay issues
7) thermal runaway
reignofchaos
Well-Known Member
I was told by Mr Merchant that the NAD amplifiers being sold at www.revolverclub.com carry no official warranty and are priced beyond official MSRP of NAD in India. Buyer beware!
kingfisher
Active Member
Is there any reliable website to purchase used HiFi amplifiers?
reubensm
Well-Known Member
In conversation with Taresh Vadgama, NAD's employee#3 in their lab
https://www.whathifi.com/hi-fi/ster...ginal-nad-3020-budget-amplifier-such-a-legend
https://www.whathifi.com/hi-fi/ster...ginal-nad-3020-budget-amplifier-such-a-legend
rwnano
Well-Known Member
Talks about high current capacity of the same
Hello fellow NAD owners. I have owed and enjoyed NAD products over 25 years. It begun with my dad and I am continuing this, after his recent passing.
One particular product is the flagship 208 THX amp. It has been well-cared for a lover the years by my dad who got it brand new to power his Focal speakers. The Harman Kardons were just doing those Focals any justice and he got these monsters to make sure power was never a limiting factor in the setup. Recently the amp developed a strange issue during power ups. The NAD techs have been left puzzled by this as there can't seem to point to the problem.
I thought this issue might be something suited for the technically inclined members here who may or may not have encountered such a problem and found a solution had there been one.
The setup and operation sequence:
I have a streamer that serves as a preamp(Primare i15) that is connected to the power amp(NAD 208) using an RCA connection. There is no 12v trigger running from the Pre to the Power. Therefore, when I switch on the system, it will be the Pre powered first followed by the Power. The LED goes from RED to GREEN after the relay clicks, within a second or two. However, this has not been the case with my unit.
The initial fault:
Earlier this year, when this sequence was followed- Power amp after the Pre amp, the standby red LED came on but the relay took anywhere between a few seconds to 8 mins(yes! 8 mins on some days). I thought this was normal because once the relay clicked, showing the green LED, it was ready to go. The amp played for hours without any problems.
One fine day, following the same power up sequence, the relay took a minute to click and when it did, the red led did not switch to green. There was in fact a double click as though a rocker switch was switched on and off. A loud thud sound was emitted from the speakers. It was really loud as though the woofers had blown. I immediately switched off the Power amp and the mains.
When this was brought to NAD they could not replicate this problem with their setup. The only thing that they could observe was the delay in the relay(approx 1 minute) but this was not consistent. At times, it would just power on as normal with the relays clicking instantaneously. Whereas, at other times, it took a few seconds. One thing I observed at home was that if it was used everyday for an hour or so, it would switch on without any delay the next day. A few days of no usage would see the amp acting up. But we were unable to establish this firmly because back in the workshop, it powered on within seconds despite being left tuned off for a few days. So far, only the 220uf cap in the protection circuit has been replaced.it worked fine for week and the delay slowly creeped up. someone who is familiar resolving such a problem can point me in the right direction because, all we are doing now is guesswork, with hope that the problem is resolved.
Thank you for taking time to read my post. Appreciate your help, lads.
One particular product is the flagship 208 THX amp. It has been well-cared for a lover the years by my dad who got it brand new to power his Focal speakers. The Harman Kardons were just doing those Focals any justice and he got these monsters to make sure power was never a limiting factor in the setup. Recently the amp developed a strange issue during power ups. The NAD techs have been left puzzled by this as there can't seem to point to the problem.
I thought this issue might be something suited for the technically inclined members here who may or may not have encountered such a problem and found a solution had there been one.
The setup and operation sequence:
I have a streamer that serves as a preamp(Primare i15) that is connected to the power amp(NAD 208) using an RCA connection. There is no 12v trigger running from the Pre to the Power. Therefore, when I switch on the system, it will be the Pre powered first followed by the Power. The LED goes from RED to GREEN after the relay clicks, within a second or two. However, this has not been the case with my unit.
The initial fault:
Earlier this year, when this sequence was followed- Power amp after the Pre amp, the standby red LED came on but the relay took anywhere between a few seconds to 8 mins(yes! 8 mins on some days). I thought this was normal because once the relay clicked, showing the green LED, it was ready to go. The amp played for hours without any problems.
One fine day, following the same power up sequence, the relay took a minute to click and when it did, the red led did not switch to green. There was in fact a double click as though a rocker switch was switched on and off. A loud thud sound was emitted from the speakers. It was really loud as though the woofers had blown. I immediately switched off the Power amp and the mains.
When this was brought to NAD they could not replicate this problem with their setup. The only thing that they could observe was the delay in the relay(approx 1 minute) but this was not consistent. At times, it would just power on as normal with the relays clicking instantaneously. Whereas, at other times, it took a few seconds. One thing I observed at home was that if it was used everyday for an hour or so, it would switch on without any delay the next day. A few days of no usage would see the amp acting up. But we were unable to establish this firmly because back in the workshop, it powered on within seconds despite being left tuned off for a few days. So far, only the 220uf cap in the protection circuit has been replaced.it worked fine for week and the delay slowly creeped up. someone who is familiar resolving such a problem can point me in the right direction because, all we are doing now is guesswork, with hope that the problem is resolved.
Thank you for taking time to read my post. Appreciate your help, lads.
Purchase the NEW Audiolab 6000A MkII Integrated Amplifier at a special offer price.
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