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Official NAD T 757 AV Upgradeable Surround Sound Receiver Thread - Page 5

post #121 of 239
Quote:
Originally Posted by Flozem View Post

Dunno which firmware is on there now. How can I check that?
Got this instruction from Lenbrook earlier, on how to check which installed software version I had: simultaneously press < SOURCE + SOURCE > (arrows indicating left/right, use the the selector on the receiver).
post #122 of 239
Quote:
Originally Posted by Flozem View Post

Now if only NAD could solve my issue concerning that start-up buzz. Been a week now since my last contact with the technician at Lenbrook in which she asked me for some more patience... getting anxious to get my final issues with this receiver solved. *fingers crossed*

I'm also awaiting feedback, both from Lenbrook but also through the technician I mentioned earlier...
post #123 of 239
Ok checked firmware, and I'm on version 1.39. Been listening to music all evening without issue now (40 - 50db). Will try warming up the receiver tomorrow playing a movie first... But if it's only after movies with a warmed-up receiver, I guess I can live with that plopping noise...
post #124 of 239
Quote:
Originally Posted by Flozem View Post

if it's only after movies with a warmed-up receiver, I guess I can live with that plopping noise...

Yeah, a lot harder to live with the buzzing noise...
post #125 of 239
Hi
What are the main differences between the T748 and the T757?
Is it purely a question of power, or is there also a difference in movie sound quality?
I can get a demo model of the T757 for two thirds of the price for a new unit
Thanks
Jakob
post #126 of 239
Main difference:
Power. I had the t747 and changed it for the t757, and I'd say it's noticable.

But I would have been perfectly happy using a t747 if it didn't have that plopping noise as my room isn't very big and the t757 costs twice the amount I paid for the t747.

Aside from that there's some additional functionality like zone 2 output and a few more inputs. It also has swappable audio and video modules. Though I think I'd sooner buy a new receiver before changing modules as I hear they are pretty expensive. It has a slightly nicer menu too...

Make sure to get the t757 v2 if HDMI ARC is important to you.
post #127 of 239
Just ordered the 757. Pairing with a brand new set of SVS Ultra towers and center. Really excited to hear this NAD. My thought going into it is that It might not be enough power. I understand how NAD rates their receivers and all reviews say that the 757 "punches above it's weight class" so hopefully I'll be set. That said, if I like the sound quality of the 757, more likely than not I'll add an amplifier to power the fronts. Truly can not wait for all the new goodies to get here. Speakers tomorrow and the NAD sometime next week.
post #128 of 239
Quote:
Originally Posted by F4Boy View Post

Just ordered the 757. Pairing with a brand new set of SVS Ultra towers and center. Really excited to hear this NAD. My thought going into it is that It might not be enough power. I understand how NAD rates their receivers and all reviews say that the 757 "punches above it's weight class" so hopefully I'll be set. That said, if I like the sound quality of the 757, more likely than not I'll add an amplifier to power the fronts. Truly can not wait for all the new goodies to get here. Speakers tomorrow and the NAD sometime next week.

Congratulations! Hope you'll like what you hear and that it matches your speakersystem! smile.gif

I'm very interested in whether you at all notice any problem regarding the high pitching noise/buzz mentioned in the posts above. Please post your findings when you've installed the receiver.
post #129 of 239
Quote:
Originally Posted by rodjon View Post

Congratulations! Hope you'll like what you hear and that it matches your speakersystem! smile.gif

I'm very interested in whether you at all notice any problem regarding the high pitching noise/buzz mentioned in the posts above. Please post your findings when you've installed the receiver.

Thanks Rodjon. I set up the speakers yesterday and listened for about six hours, at mostly very moderate levels to give them a little break in. They sound very, very good with my Denon 2310ci especially with multi channel sources, SACD/Blu rays. Cd's sound like crap mainly because that's the Denon's weakest attribute and one of the main reasons I ordered the NAD, besides better dynamics, imaging and an overall better sound quality.

I've seen you guys going on and on about the buzz and it bums me out! I'd love to see how much you love the unit and get into all it's positives as I mentioned above. I'll tell you though, I have 60 days in which I could return the 757 for any reason. If I had a high pitched noise in my unit, I would send it back in a second. I will let you know once I get it and have it in the system. If it's not dead silent, it will go back. Believe me, after reading all your posts, it's something I'm paying attention to.
post #130 of 239
@F4Boy
Make no mistake: I love the sound the NAD produces, and I believe the same goes for Rodjon. Positively the main reason both he and I are still trying to get that stupid buzzing issue solved.

That and the fact that while I could have returned it for a Marantz SR7007, I have been reading a lot on production failures like overheating and firmware updates going wrong applicable to that receiver... And I did not like the Marantz sound during my listening session playing through my Monitor Audio BX2.

I guess most problems come from the fact most electronics are nowadays produced in China and have mediocre quality control. Unavoidable unless you're switching to the extremely expensive brands. But still, not something anyone should accept when paying 1500 Euros for a product...

That said, I fervently hope you do not have the buzzing or any other problems with your receiver. I would be much obliged if you could post your product serial number once you have listened to your setup. It might help Rodjon and I in getting a flawless replacement...
Edited by Flozem - 5/4/13 at 10:40am
post #131 of 239
Flozem - I understand what your saying and your expectations when paying good money for the NAD or any other product for that matter. Of course I'll report back and give you my experience, as well as the serial # if that would be of any help to you guys. I'll tell you, I'm very excited to get NAD in my house again. I used to have NAD separates in the mid 80's, the 2200 amp was exceptional but succumbed to clipping problems sooner than it should have, which kept me away from NAD for all these years. I just remember how clear and dynamic that amp was, and that many reviews (pro and consumer) say NAD has not changed one bit and the 757 continues their tradition of excellent SQ. Can't wait to see for myself. It should be here Thursday and set up by the weekend.
post #132 of 239
@Flozem
Well, I am sorry to announce that I got word from my dealer today: NAD is not able to re-create the fault at their testingfacility, which means they can't come up with a solution... I'm still very fond of the sound the receiver produces, but I really can't accept the buzzing. Starting to get somewhat tired of the whole situation... I'll speak to my dealer later on this week, and see if we'll try swapping for yet another T757. Or... maybe I will switch focus towards the T777, as I would like to stay on the NAD-path. But it's another €1000 up on the T757.

@F4Boy
Any news on how your T757 acted? Turned out to be dead silent (fingers xed) or with the noise-problem? As Flozem stated earlier on, we'll both be very grateful if you would state your serial number.
And also, as Flozem mentioned, we do like the soundquality of the receiver, but the noise we're having problem with is really something you just can't ignore. It's obviously a fault in the receiver, and as it seems a fault that NAD can't find ways to correct. Let's hope your T757 worked out fine!
post #133 of 239
Hey Rodjon!!

Thanks for the best wishes!! My 757 is absolutely AWESOME!! I'm in love with it. It is dead silent. The NAD ultra clean, dynamic power is just a pleasure to hear again. It's just a beautiful piece of equipment. Very easy to setup and make adjustments to. Just great stuff, and powering the SVS Ultras is a match made in heaven. What I keep thinking about when I listen to it is Why isn't this receiver more popular?!?!?! You cannot ask for anything in this price range to sound better. I am so pleasantly shocked at how good the 757 sounds!!

As far as the serial #, I do want to be helpful to you guys but I can't see anything good coming out of sending anyone the full serial #. Also, I have a U.S. product and believe we have different electrical needs. I say this because besides you guys, there were two or three other problems I saw with the 757 and all of them are in Europe. Maybe I'll PM you the first few letters/numbers, but I don't feel comfortable posting the whole serial #.
post #134 of 239
Allow me to chip into this thread on NAD gears. I am an owner of the NAD gears in specific the NAD master series M15HD2.

The buzzing/popping/high pitching noise that you all mentioned was as well experienced by me in the last few months and initially i though it's a software glitch or perhaps a CPU "hang" so a simple reset of the unit by power cycle it solved the problem. But as time went on, in the immediate next few months the issue becomes more and more frequent until you cant even use the unit for any reasonable duration, says to finish a movie and once the problem starts, the simple power cycle wont solve the problem as it should be in the first place.

This problem prompted me to contact Lenbrook for a solution and they insisted me to carry out the firmware update which i did. But after the firmware update, the units works for a few hours and then it's gone for good. All it makes now is the buzzing/popping/high pitching noise and no signal, be it digital/analog gets to pass through it. I did factory reset, unplug power cord and wait for a few hours, tried another day and nothing works.

Therefore based on my experience, if you do have such issue, pls be attentive to it and get it addressed before it's too late, ie. when the warranty runs out as you'll be paying expensive bills to fix it later down the road. If your dealer is willing to do refund on your unit, my suggestion is, pls take the refund and look elsewhere. For my case as i was buying through Lenbrook direct outlet, i have no such option offered by them and is blamed of possible abuse/mishandling. Any of these problems happen randomly and illusive hence there's chance that the factory cannot replicate the problems (but i have other theory on this one which i dont want to mention it) hence it's your own loss if you continue with the problems and one fine day, your unit might ended up like mine, soundless.

As well, do note of any high hiss coming from your speakers with the audyssey ON and OFF and judge it yourself if you can live with that because other competing brands usually has none.

So you make your own decision if you want to put up with such potential loss of your money spent or look elsewhere for the more reliable products.
post #135 of 239
@Hifi4Hobby
Thanks for the input (and heads up!)! Your story certainly doesn't encourage further adventures with NAD... The master series is well above my price range, and still your unit has even more problems than the T757. No sound at all? Something seriously wrong with the DSP?
It's sad, as the audio the T757 delivers is great, and I guess your unit did really well in that area as well until your problems started?
You mention ways to try dealing with your problems; "simple reset of the unit by power cycle it solved the problem". You lost me there, exactly how do you perform that operation (sorry, English is not my native tongue...)?

@F4Boy
Congratulations!! Nice to hear there are units working just fine! Regarding the serial number; if you're not comfortable with posting it, of course you shouldn't. We're just trying to figure out a "clean" batch and trying to avoid a potentially faulty one. I'm aslo somewhat curious why the NAD AVRs aren't more popular, but I guess it has a lot to do with NADs minimalist-approach on their AVR-units. Maybe many people like to have all the "extras" rather than focus on the actual sound quality?

Anyhow, I payed a visit to my dealer today. After discussing swapping for another T757 or not, they offered me to bring home their T787 demo-unit this weekend. Mainly to make sure that their unit doesn't produce the same kind of buzzing noise when in place at my home. If that turns out in a positive way, I think I'm leaning towards getting a T777 instead of yet another T757. We'll see, I'll keep you posted.
post #136 of 239
Quote:
Originally Posted by rodjon View Post

@Hifi4Hobby
Thanks for the input (and heads up!)! Your story certainly doesn't encourage further adventures with NAD... The master series is well above my price range, and still your unit has even more problems than the T757. No sound at all? Something seriously wrong with the DSP?
It's sad, as the audio the T757 delivers is great, and I guess your unit did really well in that area as well until your problems started?
You mention ways to try dealing with your problems; "simple reset of the unit by power cycle it solved the problem". You lost me there, exactly how do you perform that operation (sorry, English is not my native tongue...)?

@F4Boy
Congratulations!! Nice to hear there are units working just fine! Regarding the serial number; if you're not comfortable with posting it, of course you shouldn't. We're just trying to figure out a "clean" batch and trying to avoid a potentially faulty one. I'm aslo somewhat curious why the NAD AVRs aren't more popular, but I guess it has a lot to do with NADs minimalist-approach on their AVR-units. Maybe many people like to have all the "extras" rather than focus on the actual sound quality?

Anyhow, I payed a visit to my dealer today. After discussing swapping for another T757 or not, they offered me to bring home their T787 demo-unit this weekend. Mainly to make sure that their unit doesn't produce the same kind of buzzing noise when in place at my home. If that turns out in a positive way, I think I'm leaning towards getting a T777 instead of yet another T757. We'll see, I'll keep you posted.

Rodjon, power cycle means you basically press the front power button to put it to standby and then power it back on. My unit has the "Check DSP" shown on the screen when the problem starts to appear. Frankly, i didnt have enough time spent with the NAD to really appreciate the sound (as most of the time spent communicating and gett the units exchanged and shipping to and from) but from the spec alone, it seems they're decent in their own way. Yet if you're buying a sports car that ended up most of the time in the workshop, what's the point of buying it in the first place? mad.gif

My point is if these units arent built to work for the next few years from new then it'll be hectic for the owner(s) trying to diagnose, communicate and travel to and from (in my case shipping to and from) the dealer/outlet. That'll be time and money wasted not to mention inconveniences and frustration that comes associated with it. And when the warranty is over, you'll be paying for the repairs for parts and labor who knows how much it'll cost you? And in my case, it is my 2nd time needing another attention from the factory within a year's time frown.gif
post #137 of 239
Quote:
Originally Posted by Hifi4Hobby View Post

Rodjon, power cycle means you basically press the front power button to put it to standby and then power it back on.

Oh, I see. Thanks for clearing it out! I don't get any message on screen though, but the nearest thing to an explanation I've come is that there's something in the DSP that isn't working as it should.

Yet if you're buying a sports car that ended up most of the time in the workshop, what's the point of buying it in the first place? mad.gif

Yeah, see your point.

I got the impression you've tried quite a few NAD-units (?), but after this one I guess you're looking elsewhere?
post #138 of 239
Quote:
Originally Posted by rodjon View Post


The "glitch" in the DSP engine sees to be quite wide spread. I dont know how bad since i dont work for NAD but i was in the service center for a warranty claim previously and i seen a whole stack of NAD waiting to be fixed and a few more being tested after fixing. So take a guess..either they shipped in millions with a small percentage coming back for repair OR a higher than normal failure rates on their units are returned for attention.

Well, my previous system that i replaced with the NAD has absolutely no issue in performing up to my expectation and mind you, they're cheaper than the NAD Master lineup and also built in China at their own factory. I realized the difference on NAD gears is, they're Original Equipment Manufactured (OEM) by the chinese in China to the specification by NAD. That's how you should read their Made in xxx label.

Certainly I'll give others a chance to prove what's quality and total customer satisfaction is all bout, right, Rodjon?
post #139 of 239
So, I've carried home the NAD T787 (29kg's mind you...) and tried it out. And... it does NOT produce the irritating high pitched noise noticeable on the two T757's I've tried so far! That's quite a relief. This T787 of course sounds absolutely fantastic, even though I really don't have any complaints on the actual sound department on the T757. A minor issue would possibly be the fan cooling. It's delivering a very low "swooshing" noise, only noticeable if you place your head next to the receiver. My plasma-TV produces more noticeable fan-sound, so it's really not a biggie.
Now I will return this T787 next week, and ask to replace my T757 with a T777. The T777 seems to be the very same machine as the T787, minus one of the Hölmgren transformators. This decision doesn't come that easy, it's another €1000 up on the T757. However, I really do like the sound from these NAD's, so I'll stick to the series and try to focus on the things I gain from upgrading, rather than the hole in my wallet... smile.gif
post #140 of 239
Quote:
Originally Posted by rodjon View Post

So, I've carried home the NAD T787 (29kg's mind you...) and tried it out. And... it does NOT produce the irritating high pitched noise noticeable on the two T757's I've tried so far! That's quite a relief. This T787 of course sounds absolutely fantastic, even though I really don't have any complaints on the actual sound department on the T757. A minor issue would possibly be the fan cooling. It's delivering a very low "swooshing" noise, only noticeable if you place your head next to the receiver. My plasma-TV produces more noticeable fan-sound, so it's really not a biggie.
Now I will return this T787 next week, and ask to replace my T757 with a T777. The T777 seems to be the very same machine as the T787, minus one of the Hölmgren transformators. This decision doesn't come that easy, it's another €1000 up on the T757. However, I really do like the sound from these NAD's, so I'll stick to the series and try to focus on the things I gain from upgrading, rather than the hole in my wallet... smile.gif

Amp with built in fan will always have some disadvantages in absolute quietness but their feasibility in installation is better than those passive cooling type.

Given you have a initial good impression on the T787 set they have extended to you, why not you talk to them for you to keep the T787 for the same price as the T777 because you'll never know what you'll ended up with the T777. So long the T787 is still under warranty and you're "sporty" enough to install/uninstall them from the rack and pack/unpack them and to/from the dealers all the time biggrin.gif
post #141 of 239
Yeah, that would be an option, but this is a demo-unit running on it's second (?) year and I find it a bit pricey to cash out €2000 for a used unit. Plus I'm not too keen on buying this kind of gear second hand = I'll go for the T777. smile.gif
post #142 of 239
Does anyone know what the newest firmware-version is and what's changed?

I am running

MCU  v1.31
DSP   v1.01e
Video v1.02
post #143 of 239
Quote:
Originally Posted by Fluii View Post

Does anyone know what the newest firmware-version is and what's changed?

I am running

MCU  v1.31
DSP   v1.01e
Video v1.02

I'm not sure. My T757 says:
MCU: v1.38
DSP: v1.02e
Video: v1.06

@Flozem mentioned that his unit has MCU v1.39, but I'm not sure if that's the newest version. I really don't know what the different versions changes, but maybe someone else on the forum can help you out.

I'm curious on your experience regarding the high pitched buzzing mentioned in the thread. Noticed it at all, or is your receiver running silent?
post #144 of 239
For those with issues with the T757, has the dealer attempted replacing the AM100 with an AM200? Could that have an impact?

A T757 with an AM200 should cost less than a T777 (especially if they discount it to fix an issue). The T777 has added benefits as well as the AM200, but is certainly a step up in price.

Ben
post #145 of 239
the audiosection is not replaceable for the T-757 it´s only the videosection. So you will not be able to upgrade to the AM200...
Edited by monster88 - 5/22/13 at 4:24am
post #146 of 239
Quote:
Originally Posted by monster88 View Post

the audiosection is not replaceable for the T-757 it´s only the videosection. So you will not be able to upgrade to the AM200...

I asked NAD via their salon and they said it could take the AM200. There are also a few images of the T757 with VM100/AM200 on the back.
Ben
post #147 of 239
Quote:
Originally Posted by bjfh View Post

For those with issues with the T757, has the dealer attempted replacing the AM100 with an AM200? Could that have an impact?

A T757 with an AM200 should cost less than a T777 (especially if they discount it to fix an issue). The T777 has added benefits as well as the AM200, but is certainly a step up in price.

Ben

Not sure, the suggestion never turned up, either when talking to my dealer nor NAD/Lenbrook. Lenbrook will keep me posted even though I switch for the 777, will be interesting to see if they can pinpoint the problem. I decided switching for the T777 after giving it quite some thought. It's not just the problem with the buzzing that made me decide, but also the added benefits. There are many, but some are more vital than others. My T757 is without free HDMI-slots from day 1, and I am also missing at least one audio-in. The Audyssey MultiEQ will be interesting to get acquainted with. The added power in the audiodepartment will be somewhat overwhelming, but of course nice!
post #148 of 239
Quote:
Originally Posted by bjfh View Post

I asked NAD via their salon and they said it could take the AM200. There are also a few images of the T757 with VM100/AM200 on the back.
Ben

could you post those images? would be really interesting! I also would like to have the AM200 cause of the MultiEQ.
post #149 of 239
Quote:
Originally Posted by monster88 View Post

could you post those images? would be really interesting! I also would like to have the AM200 cause of the MultiEQ.

http://nadelectronics.com/img/img.php?120412151953-T757_Rear.jpg/1200

Ben
post #150 of 239

LOL - that´s nice! But i doubt that this can be taken serious. e.g. the V2 757 has the VM150(MDC) and all 757 have the AM100 (not replaceable).

i think it´s just a image of a prototype...but however it could image that US customer who persist on this feature and engaging their lawyer might have some chances to get a AM200 ;-)
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