hypex ncore - Page 433 - diyAudio
Go Back   Home > Forums > Commercial Sector > Vendor Forums > Vendor's Bazaar

Vendor's Bazaar Commercial Vendors large & small hawking their wares

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 5th June 2012, 11:42 AM   #4321
Simtu is offline Simtu  England
diyAudio Member
 
Join Date: Feb 2012
Location: Worcestershire UK
Finally finished build, tidied up wiring and sat down to do more listening;

Source is an Arcam Solo Neo (bought before upgrade itis set in) and speakers are PMC fb1s. Home made RCAs to XLRs using Gotham GAC3 cable. I originally decided to build the ncores because I needed a more powerful amp to drive the PMCs. I had around 1k to spend and decided that these would be way better than any ready built consumer power amp at that price point. And they are!!

Theres probably not much point in my going into lots of detail about the improvements to SQ given the limiting factor of my front end. Everybody else has already been through the thesaurus and used up all the adjectives but these amps really are good. I always thought that my speakers had more to give and my god they do. Transmission line designs are said to have a transparent midrange given the control afforded the driver by the mass of air inside the tube.

Suffice to say, bass is now tight and controlled, mids are sooo detailed and clear, highs are crisp and with no harshness. Soundstage is wide and deep (listening to Sonny Rollins - Saxophone Collosus as I type, sounds absolutely amazing)

Next upgrade will be separate preamp/DAC (thinking Benchmark HDR???), using 24/48khz Toslink output of CD/Fm/DAB/IPOD from the Arcam. Any news of Hypex modules? Any other suggestions would appreciated.

Only concern with Ncores is about heat. Asked about this a couple of weeks back - only one reply. Even on standby, these units get hot - far more so than the class AB Arcam. Are they safe to leave switched on?? All my gear goes inside a cabinet to keep out of sight of the nippers (and wife) and I havent dared to close the door in case they overheat. Am I being overly cautious or is there nothing to worry about??

Thanks
Attached Images
File Type: jpg IMG_0677[1].jpg (773.1 KB, 593 views)
File Type: jpg IMG_0675[1].jpg (781.5 KB, 537 views)
File Type: jpg IMG_0676[1].jpg (789.9 KB, 493 views)
  Reply With Quote
Old 5th June 2012, 12:00 PM   #4322
diyAudio Member
 
Join Date: Mar 2004
Location: At the output stage
Send a message via Yahoo to mr_push_pull
old building (no earthing except in the kitchen and bathroom): laptop (not in the kitched or bathroom) connected to TV (laptop ground earthed due to TV cable) and me touching USB cable and DAC chassis (uses SMPS) at the same time. not nice.
__________________
we all love a good ol' stereotype until it's against us
  Reply With Quote
Old 5th June 2012, 12:48 PM   #4323
diyAudio Member
 
Join Date: Mar 2004
Location: At the output stage
Send a message via Yahoo to mr_push_pull
@Simtu,

nice, clean build.
one thing I'd do differently is drop the double output wires, I'm sure you'd gain more by closely twisting 2 wires together than adopting the latest audiophile wiring fashion.
__________________
we all love a good ol' stereotype until it's against us
  Reply With Quote
Old 5th June 2012, 01:31 PM   #4324
Account disabled at member's request
 
Join Date: Apr 2009
Quote:
Originally Posted by Simtu View Post
Only concern with Ncores is about heat. Asked about this a couple of weeks back - only one reply. Even on standby, these units get hot - far more so than the class AB Arcam. Are they safe to leave switched on?? All my gear goes inside a cabinet to keep out of sight of the nippers (and wife) and I havent dared to close the door in case they overheat. Am I being overly cautious or is there nothing to worry about??

Thanks
IMO this is something to consider.
Heat is the enemy of some parts, electrolytic capacitors especially.
When checking the NC400 and SMPS600 datasheets total dissipation at idle should be some 10 watts (one amp), and it seems to get hotter.
More passive cooling than normally required for class D amps might be required?
Maybe Bruno can comment.
  Reply With Quote
Old 5th June 2012, 01:48 PM   #4325
jtwrace is offline jtwrace  United States
diyAudio Member
 
jtwrace's Avatar
 
Join Date: Jan 2007
Location: NC
He mentioned it here: hypex ncore

and here hypex ncore and more places if you look hard enough. Bottome line, Bruno doesn't seemed concerned otherwise he would make it more of a point in the data sheet on online. I think so at least. :-)
__________________
"Science is not a democracy"- Earl Geddes, Ph.D.

Last edited by jtwrace; 5th June 2012 at 02:04 PM.
  Reply With Quote
Old 5th June 2012, 02:12 PM   #4326
Account disabled at member's request
 
Join Date: Apr 2009
Quote:
Originally Posted by jtwrace View Post
He mentioned it here: hypex ncore

and here hypex ncore and more places if you look hard enough. Bottome line, Bruno doesn't seemed concerned otherwise he would make it more of a point in the data sheet on online. I think so at least. :-)
I know, but user reports indicate that there is more dissipation than the datasheets suggest.
Maybe some parts (output coils) get hot?
  Reply With Quote
Old 5th June 2012, 02:19 PM   #4327
jtwrace is offline jtwrace  United States
diyAudio Member
 
jtwrace's Avatar
 
Join Date: Jan 2007
Location: NC
Quote:
Originally Posted by pieter t View Post
I know, but user reports indicate that there is more dissipation than the datasheets suggest.
Maybe some parts (output coils) get hot?
Strange. I thought my units are actually cooler then I thought they would be. I could certainly do a temp rise test as I've done on my Class A amps but really don't think it's needed here.

How long does it take for your amp to heat up?

Maybe Bruno will chime in.
__________________
"Science is not a democracy"- Earl Geddes, Ph.D.
  Reply With Quote
Old 5th June 2012, 03:13 PM   #4328
diyAudio Member
 
Join Date: Apr 2007
The output inductor definitely gets pretty warm, I think mine were around 150F but I'd need to measure again. The heat sinks on the SMPS600 are the only things on mine that get very warm but I can't measure them accurately with an IR temp gauge since they are not black and that is what the IR device is calibrated to. Now were did I put that themocouple probe???
  Reply With Quote
Old 5th June 2012, 03:32 PM   #4329
Account disabled at member's request
 
Join Date: Apr 2009
Quote:
Originally Posted by mgalusha View Post
....The heat sinks on the SMPS600 are the only things on mine that get very warm but I can't measure them accurately with an IR temp gauge since they are not black and that is what the IR device is calibrated to. Now were did I put that themocouple probe???
There are electrolytics on the SMPS600 "covered" by the heatsinks; does not seem good for life expectancy, even if the caps are 105 degrees types.
  Reply With Quote
Old 5th June 2012, 03:44 PM   #4330
diyAudio Member
 
Join Date: Apr 2007
Quote:
Originally Posted by pieter t View Post
There are electrolytics on the SMPS600 "covered" by the heatsinks; does not seem good for life expectancy, even if the caps are 105 degrees types.
I tend to agree and have decided my chassis are getting some ventilation holes.

On the upside, the caps are below the heat sink and hot air rises, provided of course there is somewhere for it to go...
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Hypex problem, who can help Hansms Class D 9 18th August 2013 06:49 AM
Hypex steveww Class D 14 18th November 2010 01:44 PM
Question for those who have tried hypex smps with hypex modules avian Class D 12 3rd March 2009 09:30 AM
Hypex UcD 180AD + signal wires, Power Supply ST, Hypex Transformer TR100A c10h12n2 Swap Meet 7 7th July 2007 03:55 PM
FS: Hypex UcD 400/180AD, hypex toroid Archmage Swap Meet 4 14th November 2006 04:23 AM


New To Site? Need Help?

All times are GMT. The time now is 07:13 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2