Comparing GC's - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

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 8th June 2004, 06:39 AM   #1
diyAudio Member
 
Join Date: Oct 2002
Location: israel
Talking Comparing GC's

What comparisons have you made with your GCs with what equipment? And what where the results?

  Reply With Quote
Old 8th June 2004, 07:58 AM   #2
Nuuk is offline Nuuk  United Kingdom
diyAudio Member
 
Nuuk's Avatar
 
Join Date: Feb 2003
Location: Somerset, SW England
In short, bufferered GC's sound better than non-buffered (if you dont use an active preamp).

The differences between different configurations are manily just that, 'differences'.

The only way to 'know' these things is to hear them for yourself.
__________________
The truth need not be veiled, for it veils itself from the eyes of the ignorant.
  Reply With Quote
Old 8th June 2004, 09:16 AM   #3
diyAudio Member
 
Join Date: Oct 2002
Location: israel
I guess I wasn't clear enough ... I ment GC's vs. commircial stuff.
  Reply With Quote
Old 8th June 2004, 09:26 AM   #4
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
Blog Entries: 4
Quote:
Originally posted by Nuuk
In short, bufferered GC's sound better than non-buffered (if you dont use an active preamp).
Purely theoretically I think it is better if you can consider the GC as high input impedance device, regardless of configuration. Many people attach pots to the GC's and this will never get an "isolated" behavoir of the LM3875. I think you can get out the highest performance if the LM3875 or LM3886 is driven by a low impedance source (=buffer). This is usually the case for most amps.

Just speaking for myself, noone of my GC's has been configured without a buffer and both inverting and non-inverting versions have got good reviews. The problem is that none of these persons have compared between non-inverting and inveriting mode.
__________________
/Per-Anders (my first name) or P-A as my friends call me
Super Regulator SSR03 Group buy
  Reply With Quote
Old 8th June 2004, 11:29 AM   #5
Vikash is offline Vikash  United Kingdom
diyAudio Moderator Emeritus
 
Vikash's Avatar
 
Join Date: May 2003
Location: UK
Hi PA,

In simple terms, what is there a difference between using high and low impedence inputs? Any links, or quick explanations to the basics of buffering? Next stop the dungeon...
__________________
"The human mind is so constituted that it colours with its own previous conceptions any new notion that presents itself for acceptance." - J. Wilhelm. (But I still think mine sounds better than yours.)
  Reply With Quote
Old 8th June 2004, 12:05 PM   #6
Nuuk is offline Nuuk  United Kingdom
diyAudio Member
 
Nuuk's Avatar
 
Join Date: Feb 2003
Location: Somerset, SW England
Quote:
I guess I wasn't clear enough ... I ment GC's vs. commircial stuff.
Well, my only experience was hearing two GC monoblocks replace some very expensive power amps in a friends system costing the in the region of 500UKP. The GC's were significantly better than the commercial amps that cost over 1000UKP.

But what are you actually asking?
__________________
The truth need not be veiled, for it veils itself from the eyes of the ignorant.
  Reply With Quote
Old 8th June 2004, 12:38 PM   #7
Banned
 
Join Date: Mar 2003
Location: Lisbon, Portugal
Yesterday I had a visit of a friend.
He listened to my new regulated-PSU-buffered-inverted-LM3886 GC small amp and...

The man has a pair of (crap) Kef Q7 speakers, with active crossovers and 3 big amps (yes, tri-amp! Two Denon 2000s and a Nad C270).
He left my house talking alone.
He was humilliated by the size of my amp.
And BTW he told me he never heard a sound like that.
  Reply With Quote
Old 8th June 2004, 04:33 PM   #8
diyAudio Member
 
Join Date: Mar 2001
Location: Brazil
Quote:
Originally posted by carlosfm

The man has a pair of (crap) Kef Q7 speakers, with active crossovers and 3 big amps (yes, tri-amp! Two Denon 2000s and a Nad C270).
Well, he should start by improving his KEFs or go for better speakers. Those amps should do the job with good drivers.

Most amps, properly upgraded with better parts, also sound a lot better than unmodified ones. We are following building criteria with the GCs that many amps don't, but if you cure that some will bloom.


Carlos
  Reply With Quote
Old 8th June 2004, 04:58 PM   #9
Banned
 
Join Date: Mar 2003
Location: Lisbon, Portugal
Quote:
Originally posted by carlmart

Most amps, properly upgraded with better parts, also sound a lot better than unmodified ones. We are following building criteria with the GCs that many amps don't, but if you cure that some will bloom.
Carlos
Useless.
Some amps can be tweaked and tweaked but don't get to this level of performance.
You can always take everything out and make a new amp in a nice box.
I've showed to some people that music is not only bass, midband and treble.

BTW the Denon 2000's preamp (transistors) is miserable.
I transformed one of his Denons and it was a huge jump in quality.
Bypassed the transistors.
Passive pre.
He has active crossovers for those speakers.
I've never heard such a bad tweeter on a "hi-fi" product IMHO.

I would never change my GC for any of his amps, I had one of the Denons at my home and no way jose.
The Nad is not better as a power amp than the Denons.
BTW the Denons look impressive inside, I have pics.
But what about the harmonics, the reverberation, the room atmosphere, the soundstage, the immediacy of the instruments, the fast (oh so fast!), the dynamics and the REAL sound of my regulated GC?
It's like the real thing.
Other amps are bass, midband and treble.
  Reply With Quote
Old 8th June 2004, 06:07 PM   #10
Banned
 
Join Date: Mar 2003
Location: Lisbon, Portugal
Thumbs down Here's a pic of the Denon

The trafos say "Denon Super Audio".
This thing is like a Sony ES inside and out, built like a tank.
But it's just hi-fi.
Attached Images
File Type: jpg denon_1_lowres.jpg (53.9 KB, 251 views)
  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
im an stupid? (comparing SQ) samsagaz Chip Amps 14 27th March 2009 05:49 PM
Comparing 3 topologies hahfran Solid State 19 24th November 2008 08:33 PM
Comparing two old MCM woofers diydave Multi-Way 1 27th August 2008 05:40 AM
Comparing Bose(o) Chip Amps 5 29th July 2005 09:19 PM
Comparing sensitivities Grahamt Multi-Way 2 20th September 2004 06:42 PM


New To Site? Need Help?

All times are GMT. The time now is 07:18 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