Sure class T or Destroyer X? - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 1st July 2013, 06:25 PM   #1
DrDyna is offline DrDyna  United States
diyAudio Member
 
DrDyna's Avatar
 
Join Date: May 2007
Blog Entries: 3
Smile Sure class T or Destroyer X?

I've been contemplating building my own multichannel amplifier for an upcoming active speaker project and I'm torn..

What do you guys think would be a better option, building an 8 channel amplifier with these

Edit: that url doesn't seem to work.. http://www.ebay.com/itm/2pcs-100W-10...item2c68d368d9

Edit 2 neither does that one, what the hell...2pcs 100W+100W DIYAudio "destroyer X" DXAMP Amplifier kit

or with these:

I'm not completely decided on a power supply either, but I'm prepared to plan for whichever ends up being better for whichever amplifier design.

I appreciate any and all input on this.

Last edited by DrDyna; 1st July 2013 at 06:27 PM.
  Reply With Quote
Old 1st July 2013, 07:04 PM   #2
DUG is offline DUG  Canada
diyAudio Member
 
Join Date: Jan 2003
Location: mississauga ontario canada
Tweeters don't need the same amount of power that the woofer does.

Mid-range is in between.
__________________
Doug We are all learning...we can all help
"You can't stop the signal, Mal. Everything goes somewhere..."
  Reply With Quote
Old 1st July 2013, 07:07 PM   #3
DrDyna is offline DrDyna  United States
diyAudio Member
 
DrDyna's Avatar
 
Join Date: May 2007
Blog Entries: 3
Quote:
Originally Posted by DUG View Post
Tweeters don't need the same amount of power that the woofer does.

Mid-range is in between.
That may be, but in building a multichannel amplifier, I have two issues with regard to uneven power.

First, I don't think they make any amplifier boards that are different from one channel to the next. Second, if I ever used this amplifier for anything else, I'd want all the channels to match in power output and sonic character.
  Reply With Quote
Old 2nd July 2013, 09:59 AM   #4
Bigun is offline Bigun  Canada
diyAudio Member
 
Bigun's Avatar
 
Join Date: Jan 2009
Blog Entries: 2
my 2c - buy one T-amp and build one DX-amp and see which one you like. You're making a fundamental system choice and I wouldn't rely on opinions read on the internet.

In favour of the DX - it's fun to build if you're into DIY amps, has a very good reputation, isn't obsolete (like T-chips), you'll be able to repair it, change it or whatever more easily if you want to.

In favour of the T-amp - if you're not into DIY amps you can buy the modules and spend your time focussed on the system issues such as cross-overs etc. Buy a spare one.
__________________
"The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed." Robert M Pirsig.
  Reply With Quote
Old 4th July 2013, 07:43 PM   #5
DrDyna is offline DrDyna  United States
diyAudio Member
 
DrDyna's Avatar
 
Join Date: May 2007
Blog Entries: 3
Well, it looks like the DX amp is out. I was browsing the designer's site today and it seems that the DX amp kits that are on e-bay aren't endorsed by him, so I'd rather not purchase a chinese copy of questionable integrity, no matter how attractive the price.

I guess the search is on for a decent real transistor-based amplifier kit. I'd like to built a 6 channel amplifier for these active speakers I'm working on, but so far the only options are 1. Sure boards..which I'm still not completely convinced on... 2. Something from Holton Precision...beautiful but expensive.. or 3.) try to borrow the college's circuit CNC machine and really build a few proper pairs of DX amps.

Unless there's a kit somewhere I haven't seen yet that's not based on switching chips..
  Reply With Quote
Old 4th July 2013, 09:27 PM   #6
diyAudio Member
 
Join Date: Apr 2010
Location: Coffs Harbour
This is DIY so option 3. would be great and actually, unusual among forum amplifiers that we see. It would be good to hear your comments and conclusions and perhaps compare the results with the more useful posts on DX's threads.

FWIW, the Epay sites have many discrete amplifier kits and PCBs available. Jim's Audio Store does sell an approved version PCB of DX's larger Blame amp with 3 pairs of output transistors, IIRC.

There are several threads here discussing the merits or otherwise of Epay and other source kits. Search ljm-ljm's threads here and the commercial sector threads if you need a hint where to start looking. From experience, LJM's kit designs work OK. Some, like prebuilt L12 models are fantastic performers whilst other cheaper kits may not be too wonderful, depending on your end use.
Good luck with the CNC milling.
__________________
Ian
  Reply With Quote
Old 5th July 2013, 01:56 AM   #7
parb is offline parb  United States
diyAudio Member
 
Join Date: Dec 2009
Location: Asia and United States
I'm a bit in the same boat as the original poster.
I've looked at the L12 and it looks interesting but it also looks like its also subject to clones by the cloners (And the risk of inferior results). Do you know of any particular trusty ebay vendor who sells a decent version so i can purchase one and tinker with it to satisfy my curiosity?

i did the sure electronics thing but i didnt like them too much.
  Reply With Quote
Old 5th July 2013, 02:09 PM   #8
DrDyna is offline DrDyna  United States
diyAudio Member
 
DrDyna's Avatar
 
Join Date: May 2007
Blog Entries: 3
Quote:
Originally Posted by Ian Finch View Post
From experience, LJM's kit designs work OK. Some, like prebuilt L12 models are fantastic performers whilst other cheaper kits may not be too wonderful, depending on your end use.
Like these, perhaps?

L12 2 Power Amplifier 2 CH Assembled Boards Heatsinks | eBay

Edit: Ugh, none of these links work!

Code:
http://www.ebay.com/itm/L12-2-Power-Amplifier-2-CH-Assembled-boards-heatsinks-/120744995234?hash=item1c1cf669a2
Quote:
Originally Posted by Ian Finch View Post
Good luck with the CNC milling.
It's an interesting option, I plan to ask one of the professors today if I'd be allowed to use it sometime. I don't think it's been configured yet, so I might just need lots of luck if I have to do it myself!
  Reply With Quote
Old 6th July 2013, 12:39 AM   #9
diyAudio Member
 
Join Date: Apr 2010
Location: Coffs Harbour
Quote:
Originally Posted by parb View Post
... Do you know of any particular trusty ebay vendor who sells a decent version so i can purchase one and tinker with it to satisfy my curiosity?...
I only found a couple of suppliers and they obviously use LJM's boards and assembly. These are already discussed in the L12 thread, so read it if you are interested to know what other buyers thought.

Really, all kit suppliers are now at risk of selling inferior parts because of widespread faking. It's not in their interests to sell fake parts in their kits but fakes are keenly supported by other customers who have no clue yet cannot resist buying at the cheapest price. They still cry bitterly when their dumb choices hit home, though.

I used the same supplier as in DrDyna's lower link address and the pair are prebuilt modules mounted to small heatinks which may actually be adequate. For six channels stacked closely, Id consider a small fan or one very large sink. This is a CFP design that runs at very low, close to optimal bias and not a typical overbiased EF or class A toaster design, so heat should not be a big issue with typical domestic use.

BTW DD, you aren't the only one who has trouble posting Ebay page links. The only link that works is to the individual unit buying page, as you found. Fortunately, that has most detail.
__________________
Ian
  Reply With Quote
Old 6th July 2013, 06:25 PM   #10
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default I am in favor of Dx too

Ahahahahahah!

Carlos
__________________
Dx Mark One - The lowest THD amplifier ever made! - LOADED
https://www.youtube.com/watch?v=OC3_AdPbLvc, Unbeatable Dx Mark One; https://www.youtube.com/watch?v=u4tGBiqMnzQ
  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
Contest: Linear Power Amp in a mint tin (class Aa, class AB, or class B) danielwritesbac Chip Amps 206 19th January 2013 09:52 PM
my picture... the destroyer X destroyer X The Lounge 14 18th February 2005 03:50 PM


New To Site? Need Help?

All times are GMT. The time now is 06:56 PM.


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