I have had the NAD C541i for a few years now and generally agree with your assessment. I have also seen the CDP sound described as being a bit gray at times. For me it was polite, seemingly detailed, but really excelled with a HDCD disk. It was gray at times, as well, playing CDs. I Just flipped them off and turned to Lp.
I saw a few mods being talked about on different sites and decided to change some caps and the opamps.
Resource: http://www.diyaudio.com/forums/showthread.php?s=9b3bf9cf3b7113e1c27fce9d54579250&threadid=43902&perpage=25&pagenumber=1
My mods: http://home.comcast.net/~omaille/audio/NADC541i/nadC541iMods.html
Damping the chassis and transport seemed to change the noise floor and focus dramatically. The Blackgates really added some oomph and clarity - nice sweet topend. The opamps really added a high level of transparency. The output caps turned on the presence, the several steps forward presentation and incredible presence, I mean WOW. There is more controlled bass than I should be allowed to have. The mods have improved the stock CDP without a doubt. I have been very very pleased with the CDP but when switching to Lp I still see how small (and congested even with the mods!) the presentation is in comparison to my SL-1200 /w Wood SS re-tipped DL103 going through a modded Cambridge 640p.
If I play CDs starting out I can play them for a serious duration. After about an hour of warm up the whole presentation improves and it is very palpable. ..but there is still the edge or hash that is still present which can be seen when switching over to Lp. I was thinking about upgrading the clock in the 541 but saw an 8x TDA1543 NOS DAC for sale from VALAB. This thing is so over built for less than $200 and said to approach the vinyl experience much closer that I went for it. I will see what is up when it arrives next week. (I know I improved the 541 as a transport by just damping the hell out of it that I will keep it as such using the coax output.)
I thought to add comments to your review since the CDP is probably much cheaper on the used market by now and the mods are not that expensive if done DIY. The improvement is very satisfying. If my NOS DAC does not cut the mustard or ever fails I will happily [but with chagrin, I suppose] go back to the modded analog outputs on the C541i.
In the time I have had it I have not had any service problems with it. The board is rugged enough to take some modding by an amateur and withstand the torture. It has read every Disk and CDR I have given it. It will fail on damaged CDPs, obviously, and intermittently I have had to recycle the machine to get it to read a certain couple of CDR's but it succeeds after the restart.
If you buy it just to play HDCD and forget the mods then it is still worth it. The way it presents HDCD is amazing. That distinction is met better by 'normal' CDs after the mods but HDCD still is it's raison d'etre.
I hear that NOS DACs beat the HDCD so here is hoping.
I saw a few mods being talked about on different sites and decided to change some caps and the opamps.
Resource: http://www.diyaudio.com/forums/showthread.php?s=9b3bf9cf3b7113e1c27fce9d54579250&threadid=43902&perpage=25&pagenumber=1
My mods: http://home.comcast.net/~omaille/audio/NADC541i/nadC541iMods.html
Damping the chassis and transport seemed to change the noise floor and focus dramatically. The Blackgates really added some oomph and clarity - nice sweet topend. The opamps really added a high level of transparency. The output caps turned on the presence, the several steps forward presentation and incredible presence, I mean WOW. There is more controlled bass than I should be allowed to have. The mods have improved the stock CDP without a doubt. I have been very very pleased with the CDP but when switching to Lp I still see how small (and congested even with the mods!) the presentation is in comparison to my SL-1200 /w Wood SS re-tipped DL103 going through a modded Cambridge 640p.
If I play CDs starting out I can play them for a serious duration. After about an hour of warm up the whole presentation improves and it is very palpable. ..but there is still the edge or hash that is still present which can be seen when switching over to Lp. I was thinking about upgrading the clock in the 541 but saw an 8x TDA1543 NOS DAC for sale from VALAB. This thing is so over built for less than $200 and said to approach the vinyl experience much closer that I went for it. I will see what is up when it arrives next week. (I know I improved the 541 as a transport by just damping the hell out of it that I will keep it as such using the coax output.)
I thought to add comments to your review since the CDP is probably much cheaper on the used market by now and the mods are not that expensive if done DIY. The improvement is very satisfying. If my NOS DAC does not cut the mustard or ever fails I will happily [but with chagrin, I suppose] go back to the modded analog outputs on the C541i.
In the time I have had it I have not had any service problems with it. The board is rugged enough to take some modding by an amateur and withstand the torture. It has read every Disk and CDR I have given it. It will fail on damaged CDPs, obviously, and intermittently I have had to recycle the machine to get it to read a certain couple of CDR's but it succeeds after the restart.
If you buy it just to play HDCD and forget the mods then it is still worth it. The way it presents HDCD is amazing. That distinction is met better by 'normal' CDs after the mods but HDCD still is it's raison d'etre.
I hear that NOS DACs beat the HDCD so here is hoping.