Hi Stan,Quote:
Originally Posted by StanleyB
So removing MLC5/6 will affect midrange to go back, instead of forward as it seems now on my 7520(only mod I did is LM4562NA opamps)?
Thanks
Printable View
Hi Stan,Quote:
Originally Posted by StanleyB
So removing MLC5/6 will affect midrange to go back, instead of forward as it seems now on my 7520(only mod I did is LM4562NA opamps)?
Thanks
As I said :). SO you can use MLC5/6 to compensate for speakers that are too forward in the midrange.Quote:
Originally Posted by RoboCopper
I've ordered a pair of AD826 for my Caiman, will compare them with the LM4562. Just out of interest, though, as I'm well impressed with its performance at the moment.
Yep - I agree with you now! I put the 49720HA metal can back in last night and I think it does have the edge over the LM4562NA. It seems to have a slightly bigger sound stage and generally seems a bit more accurate. Maybe ever so slightly less bass though.Quote:
Originally Posted by Codifus
Loving it at the moment!! Everything sounds great!!! Well apart from Coldplay but I don't think any op amp can help that :p
Butuz
Don't you just want to shoot their engineer?Quote:
Originally Posted by Butuz
Hung,drawn and quartered more like!
If you've seen 'The Matrix' I suppose you could say it's like taking the red pill, in that you won't be able to go back to how things were before. In other words, you wont be able to stop fiddling now you have started.Quote:
Originally Posted by RoboCopper
Personally I found the removing them opened up the sound a lot, but then I haven't really got the skills to put it back in place to compare, it was a leap of faith and the tight space led to me damaging the cap slightly, so I just removed them altogether.
Are you using the LM49720 in both opamp sockets or just one?Quote:
Originally Posted by Butuz
CD
Just in the Pre/Fixed socket with LM4562NA in the headphone socket.Quote:
Originally Posted by Codifus
Why? Do both sockets make a difference???
Butuz
Yes they do. And so the possibilities do increase:)Quote:
Originally Posted by Butuz
CD
Oo that's interesting.
i'll have to get my hands on another LM49720 to try as at the mo I only have 1!
Butuz
How does or in what way does the headphone opamp make a difference to the main output?
I think that every member of this forum has seen "The Matrix", although I also think that my grandma have not seen it, but she is not member of this forum, neither she know what the DAC is ;)Quote:
Originally Posted by Maximum
Anyway, it is an excellent explanation of what can happen if you remove those caps. Is there more info on this forum about removing those caps?
Cheers (must think of blue or red pill now)
I agree, I even tried to listen to DAC with only one opamp, and the sound is the same.Quote:
Originally Posted by Clive
There should be more information earlier in this thread and in the sticky thread. The majority of people liked the change, although someone did have the caps put back.
I tried changing the headphone opamp for differences on line out but decided it made no difference or was too small a difference to matter, especially as it complicates issues when balancing line out and headphones.
You also have to keep in mind that there are 2 types of listeners here; those with headphones and those with stereos.
In my case, I've never used the headphone section.
CD
Me too, David. All my efforts have been towards improving the fixed line outputs.
Me, as well.
I am concentrating only on fixed output as I only listening speakers as only speakers can create musical space, involvement as it was recorded. I do not even own headphones, I know you can hear more with headphones and can be enjoyable, but...... room is room, space is space, ......my opinion.
Greetings
This is my first post. Have enjoyed the reading, but more importantly I am very much enjoyng listen to my 7520 with the mods. I am looking to do the audio cap. mod. Has anyone used the Elna SILMIC II 47uF 16V 85'c Capacitors on the six you replace on the Audio board.
Do the capacitors need to polarity or can they be Non-polarity?
Thank
The way I read it it's non-polar caps.
At the risk of shooting myself in the foot and being trampled in the stampede, if you hadn't noticed already the ultimate full monty TC-7520 mods have gone live at Tirna Electronics. :)
So for the electronically challenged like me there's no excuse, apart from the little matter of having the necessary cash.:(
He he mine is already at Tirna's :eyebrows:
Been there....done that.... :ner:
Ah.... but I am getting some extra's and so is Dave :eyebrows::eyebrows::eyebrows:
That me being left out the loop again Jerry? ;)
G'wan, spill the beans..its a nice drive from Motherwell to West Linton, and it'd be a shame to let this good weather go to waste? :)
What do you mean again?
All we got done extra was the 12K resistor and the shortcut mod. Jimmy offered so we couldn't refuse......:eek:
Is you e-mail ok? I sent you a message yesterday asking about how the Beresford was sounding afeter a few days use and Dave has been trying to contact you as well.:scratch:
Uhm..should be Jerry?
I'm back to using MS Outlook for my mail after a reinstall, so possible theres a filter somewhere thats causing a problem, dunno.
Will check.
About the upgrades...
I noticed even as recent as last week the Dac was sounding better than before..
actually, I noticed it more when I took the Lightspeed out of the system to pack it up and sort it for return it to Dave..very happy with how its sounding! :eek:
I suspect its the Elnas finally coming on song rather than the Lightspeed "strangling" the improvements...
Hows yours with the wire and resistor mod?
I've read the resistor mod can make the bass a bit TOO much?
How did you find it Jerry?
(and Dave too, if your out there!!) :)
Not got mine back from Tirna yet Gaz but I am worried about the resistor mod as I can very easily get bass boom in my little music room. Still shouldn't be tooooo difficult to change back:donk:
Looking fwd to hearing what you think of it Jerry....this and the Elna caps should be quite a jump all at once.
The Elna's really do open the sound right up..just give them time to settle.
I was saying to Dave to give the new caps some time to settle in, after a couple of weeks I thought the sound had settled.
4/5 weeks after installation is about the time to allow in my experience.
It the 12k resistor/wire mod doesnt get in the way of that I can see myself going for it.
An extra bit of heft in the bass (as long as its still tight and doesnt boom) would not be a bad thing in my system, so maybe this latest mod which gives more bass and greater dynamic range might be just what I'm after...?
I have my Amp on "Direct" and have the tone controls switched out of circuit in my amp, but I tried them with just a touch extra bass and the sound benefited from it.
Treble was all over the place though...tone controls switched off pretty sharpish!
After stumbling onto this site and seeing what you could with this DAC, I just had t order one.
Just got mine yesterday, played some FLAC files through it via USB and then from my Sonos (both sounded the same). What I really liked about the USB setup was the ability to tweak the sound a bit using Media Monkey's EQ. The heaphones sounded great, my 703's are begging to be revealed further :)
As I work for a company that assemblies printed circuit boards, I already have the Wolfson DAC, Elna Caps, and about 6 different Op amps en-route! I am really looking to see how good this unit can sound. My last endeavor was modding an Auzentech X Meridian sound card with some LM 4562's and replacing some caps. The sound was pretty awesome.
I have a feeling this DAC is going to be something else. Thanks for all the contributions from all the members on AoS.......
Realized I probably should have posted here......
So I swapped my DAC to the Wolfson, this was the only mod thus far. Played fine for several hours. Left it running over night, came back to listen to it and had no sound coming out of the right channel through analog out. On the headphones, the right output is very faint in comparison to the left. All inputs act the same.
I obviously will check the soldering on the DAC under high magnification at the shop tomorrow. Any suggestions as where else I can look for potential problems?
Looks like I found the issue of an unsoldered pin. Although I do have a lifted pad at pin 17 of the DAC as well......
Stan, is pin 17 connected? Looks like its not.
Pin 17 is not connected.
Thanks Stan....
Gotta say, even with a highly trained solderer, removing/replacing this DAC wasn't that simple.
Nice to have 30x magnification at your disposal :)
I would like to change the caps in my TC-7520. I have some Elna Silmic II 47uf 16 volts. Is this the cap you are using?
Regards
Bryan
I would have liked to use the Nichicon Caps on all locations but due to availability this is what I am doing.Quote:
Originally Posted by BryanP
The 100uf caps on this board will be replaced with Nichicon Muse Caps UES1C470MPM
http://www.mouser.com/ProductDetail/...lA%252bw%3d%3d :
http://img115.imageshack.us/img115/8...re023large.jpg
The ones on this board marked in red will be swapped with the Elna's you made mention to. Got them all from Digi-Key PN's:
RFS-25v221 2pcs
RFS-16V101 1pc
RFS-16V100 8pcs
http://img210.imageshack.us/img210/6...escription.jpg
http://img208.imageshack.us/img208/4...escription.jpg
Happy to say my DAC issues are resolved!Quote:
Originally Posted by fmzip
Just curious......why isn't the 4.7uf 50v cap replaced in front of the 220uf?
Mine needs to be replaced now that I cut it out!! lol :) Does it need to be an Elna or will any electrolytic do?
that cap isnt related to sound quality..its for the power button.
I've done the mods you are doing and Ive had that cap changed too.
Cant say the power putton works any better! ;)
LOL Gaz!Quote:
Originally Posted by Gazjam
I've been following your progress in the Beresford threads. You've been an inspiration into my tinkering!
Just curious, will a 35v 4.7uf cap be sufficient in this location?
Happy to help! :)Quote:
Originally Posted by fmzip
Good thing about AOS (As you no doubt have noticed) is theres a lot of guys willing to pitch in, share thoughts, successes and cock ups...its all good stuff.
Personally?
I'd leave that cap alone and look into power supplys next....
to me thats the last step on getting the Dac up to its full potential.
...well, until the NEXT mod comes along that is! ;)
I have the Murata power regs on order and looking to snap up a power supply on Ebay today....
The power button cap needs to be replaced as I inadvertently cut it out
Doh! :doh: :)
Well, Steps 1 and 2 are completed. ELna Caps are in and so is the Wolfson DAC.
I shall attempt the Nichicon Muse Caps this evening with utterly pathetic soldering skills! :)
Since I have the Wolfson DAC on board now, would this mod to my Sonos be of little significance now?
http://www.cullencircuits.com/webapp..._groupid=12070
Since you are considering spending $500 to $800 to upgrade your Sonos, why didn't you get the Caiman instead of the 7520?:confused:Quote:
Originally Posted by fmzip
CD
Because I can upgrade my TC-7520 for practically nothing. I have availability to all the components as samples.
Any serious mods (beyond my pathetic soldering skills) can be done at the shop I work for which assembles printed circuit boards...... :)
So are you implying that a Caiman would render this modified Sonos useless?
Fair enough. I have no experience with the Sonos so I can't realy advsie you on that.Quote:
Originally Posted by fmzip
CD
I've not tried the Cullen mod or a Sonos but I did hear quite a noticeable improvement with all my dacs including the Caiman after installing an Audiocom Superclock 4 in a Squeezebox Duet, its still running in but I hear an improvement across the range.Quote:
Originally Posted by fmzip
Massive thread , a little bewildering to read thru it.
Any ideas on what opamp's could be used to tame treble a little?
AD826.Quote:
Originally Posted by drumlins4ever
This thread summarizes things a little better:Quote:
Originally Posted by drumlins4ever
http://theartofsound.net/forum/showthread.php?t=3058
I for one read all 160+ pages from start to finish....definitely too much time on my hands, aye? :)