The "Official" NAD T 747 Owner's Thread - Page 47

Originally Posted by Ladyfingers

Wel,, ou're either relying on the source DAC or the NAD's DAC. I can say that my NAD does a better job decoding than any of my components, part of the reason I'm irked at it being so finicky about the S/PDIF from my Squeezebox.

I'm not quite sure how a fully analogue receiver implements speaker/lipsync delays in processor bypass mode, though. Analogue delay is a nice effect for guitar, but its definitely not Hi-Fi.

Originally Posted by paul.raulerson

P.S. If you are using a Coaxial cable from the SB, try using an optical cable and see if the problem goes aware or at least changes.

-Paul

Originally Posted by paul.raulerson

Nope- the same external DAC (a little Wavelength Proton) on both analog inputs, but the 7.1 Front LR inputs sound a heck of a lot better than the Audio-3 inputs. Really odd.

The T747 DAC isn't involved in this one, just the analog inputs.

Originally Posted by paul.raulerson

The problem with the squeezebox is most likely related to the SB not having an internal clock. That can make pretty much any DAC a little slow to unmute.

Indeed, a Squeezbox Touch I picked up yesterday does that same thing with the Benchmark DAC I have here, as well as with the T747. It does not do that with an Arcam rDAC though.

-Paul

Originally Posted by Ladyfingers

You're a star for doing all this. Can you let me know what firmware you're running? Mine is on M 1.20.

Originally Posted by Marty913


Sorry for the delay (forgot how to check FM level). Anyway, The readout is:

M 1.36U
D 1.0.4
V 1.40U

Originally Posted by bommai

Ladyfingers your firmware is quite a bit older. I think it will be worth it to upgrade it. Did you get any response from Mike?

Originally Posted by Marty913

Sorry for the delay (forgot how to check FM level). Anyway, The readout is:

M 1.36U
D 1.0.4
V 1.40U

Originally Posted by Ladyfingers

Thanks! It's possible a firmware fix will help.

Originally Posted by Wags22

How do you check what firmware it has?

Select AM and hold listening mode for 7 secs?

I don't have the AM tuner tuned in, is that a problem?

Should I just get the latest firmware and load it regardless and how do we get it?

Sorry for all the Q's guys, but like Ladyfingers, it would be good to have a fix for this "glitch".

Wags

Originally Posted by Ladyfingers

Thanks! It's possible a firmware fix will help.

Originally Posted by Marty913

My thanks to Ladyfingers for reminding me how to do it. Yes, use the Source buttons on the front to select AM Tuner (does not matter if anything is tuned. Hold the Listening mode button in for 7 seconds (or so) and the screen will blank & the info will appear. Have a pencil ready, it doesn't stay there long although you can keep doing it.

As for loading firmware, that is one of the single most irritating and detrimental policies at NAD. They require you to go to a local service center (of which they have almost none), or pack up your receiver and ship it off for several weeks at your expense to get this relatively simple procedure done.

Supposedly their reasoning is that it is too dangerous for an non-professional like yourself to do something as complicated as a firmware upgrade. I guess the fact that 10's of thousands perform upgrades on their cell phones, DVD players, motherboards, etc. every day escapes them. They should just admit that it is simply to generate revenue for their service centers. My personal believe is that unless this policy changes, it will be very difficult for me to consider firmware-based NAD products in the future.

Originally Posted by Phil Tomaskovic

NAD used to send me firmware update for my t785 . Just needed a usb to serial port cable for my laptop. Bob Moran would email them to me to help fix problems.

Originally Posted by Phil Tomaskovic

NAD used to send me firmware update for my t785 . Just needed a usb to serial port cable for my laptop. Bob Moran would email them to me to help fix problems.

Originally Posted by Ladyfingers

Thanks everyone. I posted at NAD Salon and a named (finally) representative told me to get in touch with someone at a Lenbrook e-mail address, someone who'd already said "sorry, we don't give out firmware."

I replied again to the Lenbrook address quoting the Salon rep, and I explained that the device is not satisfactory to me in its current state, and I can't afford to take 2 days off work and pay the courier fees to send it to my local agent for something as small as a firmware upgrade. I also explained that I picked NAD over Denon, Onkyo or Pioneer because I care about music.

No response yet, but we'll see.

If anyone's able to intercede on my behalf, I will kiss their internet derriere.

Originally Posted by paul.raulerson

Great Job! I wish I could help but they gave me the same kind of runaround - three times. Something is seriously wrong with their technical support staff these days, at least in my opinion.

Its frustrating, because the gear is so good, but not much can be done about it.

-Paul

Originally Posted by Marty913

My thanks to Ladyfingers for reminding me how to do it. Yes, use the Source buttons on the front to select AM Tuner (does not matter if anything is tuned. Hold the Listening mode button in for 7 seconds (or so) and the screen will blank & the info will appear. Have a pencil ready, it doesn't stay there long although you can keep doing it.

As for loading firmware, that is one of the single most irritating and detrimental policies at NAD. They require you to go to a local service center (of which they have almost none), or pack up your receiver and ship it off for several weeks at your expense to get this relatively simple procedure done.

Supposedly their reasoning is that it is too dangerous for an non-professional like yourself to do something as complicated as a firmware upgrade. I guess the fact that 10's of thousands perform upgrades on their cell phones, DVD players, motherboards, etc. every day escapes them. They should just admit that it is simply to generate revenue for their service centers. My personal believe is that unless this policy changes, it will be very difficult for me to consider firmware-based NAD products in the future.

Originally Posted by Ladyfingers

Thanks everyone. I posted at NAD Salon and a named (finally) representative told me to get in touch with someone at a Lenbrook e-mail address, someone who'd already said "sorry, we don't give out firmware."

I replied again to the Lenbrook address quoting the Salon rep, and I explained that the device is not satisfactory to me in its current state, and I can't afford to take 2 days off work and pay the courier fees to send it to my local agent for something as small as a firmware upgrade. I also explained that I picked NAD over Denon, Onkyo or Pioneer because I care about music.

No response yet, but we'll see.

If anyone's able to intercede on my behalf, I will kiss their internet derriere.

Originally Posted by Phil Tomaskovic

Bob Moran's email is blmoran@lenbrook.com. Write him and ask what he can do about getting you the latest firmware or help with your problem. When my t785 was new and there were some problems, he would send me the firmware updates, gather all the information on the problem I was having, he even conferenced a lead engineer on the phone call to help troubleshoot the issue. He's one of the most supportive people I've dealt with. I don't he's necessarily technical but he will work with you to get your problem solved.

I just saw you are in Melbourne, so not sure if Bob can help since he is USA based and perhaps firmware is different across countries, but if not maybe he can get you to someone local.

Updating firmware is pretty simple if you follow the directions. Like I said, you need a usb to serial port cable to go from your pc/laptop to the NAD. Some people have had problems with different brands of the cables, getting the right drivers for windows, etc. But I think if the the update software can establish the connection over the cable, you are good.

Originally Posted by Wags22

Thanks for the info.

OK, the version mine has is;

M: 1.36 E
D: 1.0.4
V: 1.40 E

Originally Posted by Ladyfingers

Apparently you should be at 1.40, not 1.36.

Do you also get S/PDIF lock drops?

Originally Posted by Ladyfingers

Thanks for this.

I'm hoping that the update allows better PLL performance. It seems like the current firmware has no PLL at all, so I sincerely hope it's not a limitation of the hardware, although considering it's using a Cirrus Logic chip it seems unlikely.

Originally Posted by Marty913

I must have missed it somewhere. What is PLL?

Originally Posted by PSBMAN

How do you adjust the Sub crossover. Or is it just Sub on or off?

Originally Posted by Marty913

Unless I've missed something you don't actually adjust the sub crossover but rather the speaker crossovers. Everything below the speaker crossover heads to the sub (assuming you have a sub defined, which would be ON or YES I guess). I haven't tried sub= OFF (none or no) but would assume speakers would effectively be set to large.

Originally Posted by PSBMAN

Yes, but every other Receiver i've owned had the option to adjust the Sub as well. When i'm watching Blu-Ray's i'd like to set the Sub to 100 instead of 80. But the T747 doesn't give you that option. My last Receiver, the Onkyo 805, was great for Sub adjustments.

Originally Posted by Marty913

First let me say that I have not owned an 805 but I have looked at the manual. I may have missed something but in SP Config you can set the Sub to Yes/No it appears; and each of the other speakers to Full Band, 80, 100, 150, etc. crossover points. There is no setting for Sub Crossover Point. You can however adjust the crossover point for the other speakers (as you can with the NAD - although you must also use the menus or create presets). You can adjust the Gain (volume) on the sub by a +/- dB.

I'm not sure how any receiver could allow direct sub crossover adjustments because it (the receiver) wouldn't know what to do with the other speakers. Example: If Audyssey (or you manually) sets some speakers to 100Hz (a common setting) then the receiver will send anything below 100Hz to the Sub. If you were to then set the "Sub" to 80Hz you could create a situation where frequencies between 80Hz & 100Hz would have in effect nowhere to go. Make sense?

I could be way off base here (and should be thoroughly thrashed if I am) but I don't ever recall seeing a receiver with direct sub crossover manipulation. If you are saying that you adjusted the other speakers from 80Hz to 100Hz for Blurays then that makes sense. With the NAD you would do that with the Presets. Create a Preset for Blurays with a speaker crossover of 100Hz.