Archive through September 10, 2004

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Thread: Archive through September 10, 2004

New member

Username: Alexfromholland

Post Number: 6
Registered: Aug-04

Posted on Tuesday, August 31, 2004 - 07:21 am:

Some people have a serious problem concerning the new A/V receiver line from NAD like the T743, T753 and T763. There is an abnormal amount of white noise (hiss) which is audible through the speakers and/or headphones. NAD does not consider this to be a problem, as they send units back with the comment 'Adjusted internal wiring', and still the hiss is there.

Also sending e-mails to NAD did not result in a solution for this problem.
I already got several reactions of people experiencing the same problem, but what could we do to solve this issue ?

Relevant Product Info

landroval

Silver Member

Username: Landroval

Post Number: 577
Registered: Feb-04

Posted on Tuesday, August 31, 2004 - 08:13 am:

persvako

Bronze Member

Username: Persvako

North Europe

Post Number: 32
Registered: Jun-04

Posted on Tuesday, August 31, 2004 - 12:26 pm:

It seems there's nothing NAD can do for that problem. To me it's a BIG problem, especially with headphones.

It looks like NAD has failed with their new generation A/V receivers! It's like a F1 car that can't pass a crash test, or an athletic using doping.

Ian Mackinder

Bronze Member

Username: Awedio

Montreal, Quebec
Canada

Post Number: 17
Registered: Jul-04

Posted on Tuesday, August 31, 2004 - 12:54 pm:

what speakers do u have? im experiencing the same problem, but im wondering if i hear it more on my klipsch. anyways, one thing i havent tried yet is the power. ill be getting a monster power center soon, and hopefully that makes a difference. i dont really want to return my nad...not sure what i would get instead.

ian

persvako

Bronze Member

Username: Persvako

North Europe

Post Number: 33
Registered: Jun-04

Posted on Tuesday, August 31, 2004 - 01:23 pm:

What is that monster??? It's not a question of power though...

Robert Mancini

Bronze Member

Username: Lesterlyles

Post Number: 33
Registered: Jul-04

Posted on Tuesday, August 31, 2004 - 03:00 pm:

Pervasko, some of the posts indicated that they had humming and hissing problems and said it had to do with powerdistribution. Monster Cable makes a Power Bar that distributes power properly among all components. This could help.

New member

Username: Alexfromholland

Post Number: 7
Registered: Aug-04

Posted on Wednesday, September 01, 2004 - 03:30 am:

Ian,

I have a set of Celestion F30s, a center Celestion C15 and two Celestion F10s as surround. I noticed that the hissing is almost not audible from the surround speakers. The main speakers (front) have a sensivity of 90dB/w as does the center speaker. The surround speakers have a sensivity of 88dB/w.

New member

Username: Alexfromholland

Post Number: 8
Registered: Aug-04

Posted on Wednesday, September 01, 2004 - 03:45 am:

Guys,

I still haven't got an answer to my question if the NAD hiss issue is only a problem of the T7X3 series ? Doe anyone know ?
I have also read a couple of reviews (especially a german one from audio.de (june 2004)) and none of them was mentioning the hiss issue !! Did they test with the speakers attached ?

Alex

persvako

Bronze Member

Username: Persvako

North Europe

Post Number: 34
Registered: Jun-04

Posted on Wednesday, September 01, 2004 - 05:30 am:

I've read somewhere that 7X2 is hiss-free.

Ilari72

New member

Username: Ilari72

Post Number: 10
Registered: Apr-04

Posted on Wednesday, September 01, 2004 - 06:43 am:

For new NAD owners/ readers: This discussion started at thread: Real weight of NAD T743?
http://forum.ecoustics.com/bbs/messages/1/69142.html
I really hope we get new answers from NAD/ our dealers soon?? Hiss/ hum with headphones is so annoying!

Mathew W

Bronze Member

Username: Xvoid

Post Number: 13
Registered: Jul-04

Posted on Wednesday, September 01, 2004 - 08:20 am:

I recently purchased a NAD with v2.03 firmware- so it's completely up to date.

As I have said before, I get the hiss thing but it doesn't bother me much but the thing that *does* concern me is the whole digital drop out thing, which has been discussed before in this forum.

Occassionally I miss the first 1/2 second of a CD via the Optical Digital input. Sometimes this happens on each track of a particular CD. I think it most likely has something to do with short gaps at the beginning of a CD track. This problem is the one thing about the NAD that concerns me and causes anxiety as it really stuffs up my music listening big time.

The sound from the NAD is superb but I think they have still got to play a bit of catchup in the HT arena in some areas.

The current management of NAD has done a lot to bring their stuff into the HT age but man, you think they'd at least test their prototypes properly before sending them to manufacturing.

I'm hoping they fix the problem once and for all and provide a hardware upgrade, if indeed it is the type of DACs or DSPs they use and can't be fixed via firmware upgrade.

New member

Username: Alexfromholland

Post Number: 9
Registered: Aug-04

Posted on Wednesday, September 01, 2004 - 08:37 am:

Matthew,

I have read about the digital drop out problem, for me this is not a big deal, as it does not occur when playing DVD's. I bought a used NAD C541 cd player an connected it by using the analog output. The DAC's of the C541 are even better than the ones in the T743. I don't know what CD players you're using, but if it is a decent player (H/K, Marantz, Denon, NAD) then you're probably better off using the analog output anyway.

Alex

persvako

Bronze Member

Username: Persvako

North Europe

Post Number: 35
Registered: Jun-04

Posted on Wednesday, September 01, 2004 - 08:51 am:

Yes Mathew W, it's also a big mistake you are talking about. I haven't experienced that because like Me, I have also a NAD CD-player - C 541i. If your CD/DVD-player is cheap, then it's better to use DA-converter in amplifier.

Somehow I'm sure that this isn't anything related to firmware. I believe this is very difficult, maybe impossible to fix. Maybe the component's create this terrible noise, that comes out as a hiss. So, because they have designed these new amplifiers like they are now, it can be really difficult to understand what is making that noise, and more difficult to eliminate that without completely changing the desing.

This should have been detected, when they were making the first builds of these amplifiers... But hey, it's made in China, not in the Europe. In the Europe this fault would have been detected for sure...

New member

Username: Alexfromholland

Post Number: 10
Registered: Aug-04

Posted on Wednesday, September 01, 2004 - 09:08 am:

Persvako,

I totally agree with you. It's a terrible mistake by NAD to bring such models on the market. But I still am wondering why the hissing is introduced in their new T7X3 receivers and not in previous models (there is a saying: do not change a winning team!). I am also curious if the T773 als experiences this hissing ? (the t773 uses a torridial (or whatever they call it) transformer).

That they produce stuff in China doesn't bother me, as long as it works properly. Anyways most of HT stuff is made over there (headphones, loudspeakers, TV's, well everything actually)

I send an e-mail to NAD that I was disappointed customer... Let's see what happens...

persvako

Bronze Member

Username: Persvako

North Europe

Post Number: 36
Registered: Jun-04

Posted on Wednesday, September 01, 2004 - 09:55 am:

Me,

You're right. I can't blame China (nor Canada). Well actually it was more a joke than a serious one.

T 763 uses also a toroidial transformer, so it's not a power consumption question, I think. I've read somewhere here that somebody claimed his 773 also experiencing this problem.

If I'd listen only stereo music from CD (using analog connection) about 3 meters distance from the speakers, I wouldn't complain so much. But because the distance isn't that much, and I like to listen a lot with headphones too and also with surround speakers, that's why I complain.

I hope NAD'll answer you, and will give some other info than just "Go to complain to your retailer about this!"

persvako

Robert Mancini

Bronze Member

Username: Lesterlyles

Post Number: 34
Registered: Jul-04

Posted on Wednesday, September 01, 2004 - 10:28 am:

From all the posts, the problems seem to be more w.th the 743 and 753

Frank Abela

New member

Username: Frank_abela

Berkshire
UK

Post Number: 1
Registered: Sep-04

Posted on Wednesday, September 01, 2004 - 12:48 pm:

Hi, I work for a dealer in the UK and we sell the NADs. We have not noticed any hiss problems with the T7x3 models.

Bronze Member

Username: Alexfromholland

Post Number: 11
Registered: Aug-04

Posted on Wednesday, September 01, 2004 - 01:21 pm:

Frank,

How do you mean that you did not notice any hiss problems ? Do you mean that nobody has returned their T743's yet ? Or did you test it yourself (just plug-in headphones) ?

My dealer also said that he did not notice any hiss problem, but he meant that nobody has sent it in for repair (yet). But how can you send it in for repair if it's there when you buy it ? You then just trade it in for a different brand like Marantz, H/K or Cambridge Audio. I wonder how many NAD's are swapped for a different brand.

Robert Gatt

Bronze Member

Username: Gatt767

Malta

Post Number: 59
Registered: Feb-04

Posted on Wednesday, September 01, 2004 - 02:15 pm:

I have a T762 with no hiss at all, others said that they were hearing a hiss! It seems that this hiss thing doesn't always show up! I think the cure for this is good power filters. Can someone with this hiss prob, tell his supplier to lend him a power filter and check for any changes!

persvako

Bronze Member

Username: Persvako

North Europe

Post Number: 37
Registered: Jun-04

Posted on Wednesday, September 01, 2004 - 02:16 pm:

Yep, you've got a 762, not 763.

Jonathan

Bronze Member

Username: Jonmoon

Post Number: 81
Registered: Dec-03

Posted on Wednesday, September 01, 2004 - 03:08 pm:

I have a T763 with no hiss.

Daniel Benatar

Unregistered guest

Posted on Wednesday, September 01, 2004 - 08:19 pm:

do you hear the hiss noise during the cd play or just when you turn up the volume without playing cd?

Thanks, Daniel

larz

New member

Username: Agimat

Canada

Post Number: 8
Registered: Aug-04

Posted on Wednesday, September 01, 2004 - 08:47 pm:

I just came from my dealer and informed them of the hiss issue on my T743.I think this series of NAD is very sensitive to power distribution. We tested a 743 and we heard the hiss as we turn up the volume and all inputs were off.We changed the source and it was louder on video 6.Next we went to the other room and tried the NAD integrated C572 and turn up the volume and there was a hiss like the 743.To convince me, he brought me to the next room again and tried the DENON 3805 and as he turned up the volume the hiss was much worst than the 743. He said they have a total of 7 rooms of HT equiptment plus 4 apartment rooms upstairs which they are really loaded. So I was convinced that maybe this is a power issue but my question to myself is how come in my basement there is a hiss on my 743 but I don't have too much load, live in a two bed room town house. Why don't we try to use some power line filter and let us see what will happen. Anybody knows some brand and where to purchase?

Daniel Benatar

Unregistered guest

Posted on Wednesday, September 01, 2004 - 10:23 pm:

did you tried it with cd or without any connection?

Thanks, Daniel

Bronze Member

Username: Alexfromholland

Post Number: 12
Registered: Aug-04

Posted on Thursday, September 02, 2004 - 01:45 am:

Guys,

Again, the hiss we are talking about is a constant hiss starting at -73dB to appr. -10dB (and then the hiss increases of course). The hiss is always there, even with nothing attached to the receiver (only AC power). When MUTE is on, the hiss disappears. When you use a digital source, the hiss also disappears when no digital input is available, resulting in the same as MUTE.

Question to Larz: what did you exactly test, because you are referring to 3 different units (NAD T743, C572, DENON 3805) ??

Frank Abela

New member

Username: Frank_abela

Berkshire
UK

Post Number: 4
Registered: Sep-04

Posted on Thursday, September 02, 2004 - 05:20 am:

Hello Alex

AFAIK we haven't had any 7x3's back for repair at all. We also haven't had customers complaining of hiss so no replacements either that I know of.

However, most customers and certainly us in the shop use these receivers purely with digital sources. Your last note indicates there is no hiss in this situation. If I get a chance I'll try a 7x3 set to analogue input on Saturday (speakers attached of course :-)

). However, Saturdays can be busy so forgive me if I don't get a chance...(I've been failing to get around to playing with some high end kit for the last two weeks!)

Incidentally, when you say the hiss is -73 to -10db, where are you measuring this from? After all, if the hiss is inaudible from the listening position in the room, then the question becomes academic surely? After all, there's quite a few higher end amps which haven't got that low a noise floor but have excellent attributes anyway. However, if the hiss is audible (and this depends to a huge extent on how efficient your speakers are), then it becomes an issue.

Regards,
Frank.

landroval

Silver Member

Username: Landroval

Post Number: 587
Registered: Feb-04

Posted on Thursday, September 02, 2004 - 06:15 am:

My T743 hisses with every digital and analog input, and the hiss is much stronger than with my old Sony DE635 so I think it's unacceptable. The -74dB to -10dB is from the main volume setting of the receiver.

Bronze Member

Username: Alexfromholland

Post Number: 13
Registered: Aug-04

Posted on Thursday, September 02, 2004 - 07:25 am:

Frank,

You could test the hiss-issue with only headphones attached to a T743. Select an analog input (like CD or EXTERNAL 5.1). You will notice the difference if you press MUTE.

Like you already mentioned, the hissing depends largely on the efficiency of your speakers. I use Celestion F30 speakers (90dB), which is relatively efficient, and the hiss is very good audible from a distance to appr. 5 meters.

If you have time, please test the T743 with only headphones connected and let us know what you think.

Alex

Smitty

Silver Member

Username: Smitty

Canada

Post Number: 120
Registered: Dec-03

Posted on Thursday, September 02, 2004 - 07:56 am:

Has anyone tried testing the hiss issue just by using the test tones? This should eliminate the source as a potential problem. I have a T742 and I do get hissing starting at about -5dB and getting louder with the volume from that point. It bugs me, but like others it is not noticable at my normal listening levels - even at loud listening levels such as 0dB the sound is so loud it's not noticable either. It's too bad it's there but given the choice I'd rather have quality sound than a completely hiss-free receiver - finding both at this price range (C$650/US$400) is pretty tough. Now if I had shelled out C$2000 for a T773 then I'd be looking at other options. At this point if I was considering a new T743 or T753 I'd probably hold out for the Outlaw 1070 instead. Other perhaps pertinent information:
- My speakers are rated at 95dB efficiency.
- I have all my audio components on their own 15amp circuit.
- I use a voltage regulator

landroval

Silver Member

Username: Landroval

Post Number: 588
Registered: Feb-04

Posted on Thursday, September 02, 2004 - 08:35 am:

The hiss is there with just test tones playing.

persvako

Bronze Member

Username: Persvako

North Europe

Post Number: 38
Registered: Jun-04

Posted on Thursday, September 02, 2004 - 08:52 am:

So far there's nobody that owns 7x3 hiss-free unit?

If there is somebody with hiss-free unit, please reply this thread. Remember to connect headphones first to your amplifier and listen possible hiss with that, before you say anything!

Mathew W

Bronze Member

Username: Xvoid

Post Number: 14
Registered: Jul-04

Posted on Thursday, September 02, 2004 - 10:32 am:

On a side note, for those using their computer (via RS-232) to control the T763 or T773 using firmware 2.03, a new version of the PC Software will be available soon on the NAD website. I emailed NAD and they told me. Not all features are accessable on the current PC Software using the 2.03 firmware.

Still waiting on an updated manual, so I can find out what the extra bits in 2.03 are. Like the "Enhanced Bass" setting in the speaker setup page. We could guess what this means but I'd like to know the exact details.

My previous receiver was a Sony STRDB-930 and I was truely surprised at the amount of hiss coming from the T763. I'd say it is roughly about twice as loud as the Sony but may also be more noticeable because it is a brighter hiss as well. But the receivers can't really be compared.

Jonathan

Bronze Member

Username: Jonmoon

Post Number: 82
Registered: Dec-03

Posted on Thursday, September 02, 2004 - 11:03 am:

persvako, What? Can't you read? I said I owned a NAD T763 with no hiss. Landroval did an incredible job of posting all of the last hissy fit threads including threads where the NAD was defended. I have seen this same thread too many times to get excited about it. But apparently you only want to read lines that support what you think is true.

persvako

Bronze Member

Username: Persvako

North Europe

Post Number: 39
Registered: Jun-04

Posted on Thursday, September 02, 2004 - 12:08 pm:

"I have a T763 with no hiss."

Dear Jonathan,

I could also ask you that can't you read, but I won't. Because you are here, so propably you can read, or otherwise your mother or someone else is reading and writing for you. ;)

Anyway, that sentence you said earlier doesn't tell me anything. It's like saying "My car is the best". You have to give some explanation. Describe your tests, what have you done to come into this conclusion. First, have you tried your amp with headphones?

And I'm sorry, but I don't have time to read hundreds of posts, I have also another live. So forgive me for my repetition. And I think this thread is very good. Because this BIG! problem needs an explicit thread that is possessed only for this oddity.

Cheers,
persvako

Frank Abela

New member

Username: Frank_abela

Berkshire
UK

Post Number: 5
Registered: Sep-04

Posted on Thursday, September 02, 2004 - 12:30 pm:

Alex

Will do my best to test it on Saturday. 90db speakers are fairly efficient. We have the B&W 603s in the shop and they are 90db efficient too. If I get a chance I'll try them as well as headphones and compare to other processors. If I get a chance! :-)

Smitty, my speakers are 94.5db (Audio Note AN-E) so I know where you're coming from. I used to own a Naim 82/hicap/250 amp (�5000 worth) and it hissed like mad through my speakers! When the music was on it was sublime of course, but I had to leave it on mute when I wasn't using it (very rare! :-)

).

Robert - Maltese eh? Me too. Are there any audiophile clubs etc down there nowadays? I've lived in the UK for 22 years, so I don't know if there is one - it'd be cool to be able to contribute from an external perspective.

Regards,
Frank.

Jonathan

Bronze Member

Username: Jonmoon

Post Number: 83
Registered: Dec-03

Posted on Thursday, September 02, 2004 - 01:43 pm:

Persvako, you were contributing to a thread that is about NAD receivers and dealing with hiss. You responded to posters who said they noticed hiss and ignored my posting that said there was no hiss. I'm sorry if that statement doesn't give you as much information as a statement that there is hiss does. I don't know if you are just trying to see what you want to see.

I won't bring your mother into the conversation and I would appreciate if you don't mention mine.

I have a question for you. Have you read the threads that Landroval linked? There is quite a bit of information there.

Finally, yes I have connected headphones. I have also put my ear up to my speakers. I can discern no hiss. Also, I'm not sure what the point is of trying to find hiss that you can't even discern while listening. I have visited many other sites and I never see anyone asking Denon, Yamaha, PE or other readers to put their ears to the speakers or listen in headphones to attempt to find hiss that they otherwise are unaware of.

persvako

Bronze Member

Username: Persvako

North Europe

Post Number: 40
Registered: Jun-04

Posted on Thursday, September 02, 2004 - 02:33 pm:

Sorry I dindn't respond to you, Jonathan, but actually I didn't put my eye on it. It was such a short text, and there were many posters after you, who had something more to say. They also didn't reply to you. But they had much to say, so I forgot you. Don't take this world so seriously Jonathan. Enjoy your life! Put some smile on your face man! :-)

But I don't get your point. You try to understate this hiss. For me it's a BIG problem, and as you can see, for many others too. It's not anything that we try to find hiss. The hiss is there, and we try to find causes and solutions for that. It might also be possible that somebody doesn't find this hiss at first. But with headphones it's VERY easy to find. I found that hiss in the first second when I had turned my amp on. It's at least 10 times louder than in my A/V Sony. With sony I hear the hiss only when I put my ear to the speaker, like you said, but with NAD it's hearable about 10 feet distance.

Of course nobody asks Denon people to put their ears to the speaker if there's not hiss problem in the units! If there is a problem, what ever it is, then I think it's acceptable to ask people to do silly things like listening headphones...

I don't get why you don't have this hiss problem. But it's good that you said it. This is what I wanna also do, to find out if there are better working units in the market too. Like I said before if there is somebody having a hiss-free unit, please reply this thread.

Yes, landroval has done a great job. I don't underrate him. And I have read most of those NAD threads 2-3 months ago. Now I don't have time. It takes many hours, maybe even days, to finish all of them. That's all for now.

larz

New member

Username: Agimat

Canada

Post Number: 10
Registered: Aug-04

Posted on Thursday, September 02, 2004 - 03:33 pm:

Me,

I tested the 743 on the first room, C372 on the second room and the Denon on the third room.

Daniel,

No input and only the power was on.

To update you guys I came back to my dealer this morning for the second time though I was convinced yesterday that it was a sort of power issue. The sales rep immediately called NAD ( Lenbrook) since our location is only 10 kms from them. As per NAD they are already aware of this issue and the solution is just a software upgrade and they are releasing a batch of receivers soon with updated software. I hope this helps.

Anonymous100

Unregistered guest

Posted on Thursday, September 02, 2004 - 03:57 pm:

Guys enough with the Hiss, Some prior Denon units had muted amplifier stages, when the amp does not see any signal it does not amplify...therefore no hiss. Others don't, I returned an old Sony years ago that didn't have muted circutry...and guess what, it hissed. I've listen to many amplifiers lately and guess what most of them Hiss if there are no signal or sources selected, and yes this hiss is progressive as you turn the volume dial up, test it for yourselves...you'll see that most amps will hiss, yes it's annoying but not really audible if you are listening to a source at moderate levels (unless the speaker is 1 foot away from your ears) :-)

persvako

Bronze Member

Username: Persvako

North Europe

Post Number: 42
Registered: Jun-04

Posted on Thursday, September 02, 2004 - 06:07 pm:

I'm not sure, but I think we are talking here about much greater hiss levels.. Of course every amp, that has some components inside making noise, hisses. I've heard many amps, none of them have hissed like this.

larz, if the new firmware would reduce hiss, all of us'd be greatful and relieved. But I just can't believe it would change something. I hope it will though! :-)

JAW

Unregistered guest

Posted on Thursday, September 02, 2004 - 07:53 pm:

A100 - your comment is not relevant to the ongoing issue which is reported hiss levels beyond acceptable levels. This is a matter of degree and the degree of reported dissatisfaction has been repeatedly stated by more NAD owners than anybody cares to count.

Bronze Member

Username: Alexfromholland

Post Number: 14
Registered: Aug-04

Posted on Friday, September 03, 2004 - 02:17 am:

Dear Hissers and Nonhissers,

A 799 euro device should not produce an abnormal amount of hissing. Yeah, if a connect my old wharfedales (rated sensitivity 86dB), I would not hear it. But hey, I upgraded to my speakers to relatively sensitive ones. Why ? Because I wanted more sound from less watts. Why Celestion ? Because I think they sound great and they cost as much as Kef does.

So, I got a Celestion F30AV set, which sounds much better than my Wharfedales 505.2 from 1985.
I had a Philips receiver, which was rated 60WPC.

At that time I was looking for a new receiver to replace my Philips receiver, because I wanted better sound for a reasonable price. The only constraint I have is that the depth of the receiver should be maximum 40 cm (15,7").

So I came up with the following models:
- Onkyo 501E
- Marantz SR4400
- Yamaha v540
- NAD T752, T742 and T743

I choose NAD, despite it is twice the price of a Marantz. Why ? Because they (salesmen) claim it was the best in sound quality (and that's the only thing that really counts). And they (salesmen)were right. NAD sounds great and it fitted in my rack. But.... when I first switched it on...ssssssssssss..... coming from all speakers, especially from the front and center speakers. Immediattely, I called the hifishop where I bought my new gear. They (salesmen) said that it was normal behaviour, and you will find that with any 5.1, 6.1 or 7.1 receiver.

I decided to see whether it would really bug me, so I gave it a rest for a couple of weeks. On the internet I saw that more people were having similar problems. I contacted NAD through email and they replied that the hissing is NOT normal and that NAD is not aware of any hissing in their A/V receivers. So I sent the unit back to NAD and got a Marantz SR4400 as a loan device (was also on my shortlist). I lasted 2 months in order to get my NAD t743 back. Still hissing. No difference whatsoever...

Then I started this thread. Only to figure out a way to get rid off this freakin' ssssssssssssss sound. If I listened in the shop before I bought it, I wouldn't be sure that I would go for NAD, but I would definitively go for Cambridge Audio. The only problem is that nobody seems to sell CA in the Netherlands (that's where I live, but you probably figured that out already).

Conclusion: always listen before you buy!

Ilari72

Bronze Member

Username: Ilari72

Post Number: 11
Registered: Apr-04

Posted on Friday, September 03, 2004 - 03:09 am:

I did also some tests last night with my T743.
I unplugged everything else but the speakers (only 2 front speakers and center speaker). The hiss is there. Using headphones the hum/hiss is terrible, I mean TERRIBLE! I did my tests in 3 different rooms and i even shutdown refrigerator/freezer unit etc.
When watching dvd's (dd), i can hear hiss 2,5 meters from speakers (my listening position), volume level -10db.
Removing main in-pre out jumpers unit is hiss free ;)
I know, every receiver hiss a little but not like my T743. Hiss is way too loud and its not normal. I will take my unit back if nad cant fix it.
At moment im waiting answers from my dealer.

landroval

Silver Member

Username: Landroval

Post Number: 590
Registered: Feb-04

Posted on Friday, September 03, 2004 - 03:25 am:

My current speakers have a rated sensitivity of 87dB and I did notice the hiss the first second I put on my T743, so I would not underestimate the problem.

landroval

Silver Member

Username: Landroval

Post Number: 591
Registered: Feb-04

Posted on Friday, September 03, 2004 - 03:45 am:

It would be interesting if someone could try a NAD receiver with different pre- and power-amps to find out which part of the device is causing the hissing.

persvako

Bronze Member

Username: Persvako

North Europe

Post Number: 43
Registered: Jun-04

Posted on Friday, September 03, 2004 - 04:17 am:

Me and Ilari72, damn you, you stole my comments! That was what I definitely would like to say those who claim this hissing to be normal.

In my theory every NAD unit is suffering from this hissing. But, Jonathan said he has a hiss-free unit. That changes something. Why he doesn't discern this problem? Is there a certain batch of NAD's that are built differently, or what can cause this? The easiest way is question that for the time being, unless more people reports here the same...