Hi & Modding Sure Elec. 2x100 with 36v350w SMPS - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 7th April 2010, 08:55 PM   #1
DennisF is offline DennisF  Netherlands
diyAudio Member
Join Date: Apr 2010
Location: Amsterdam
Send a message via MSN to DennisF
Default Hi & Modding Sure Elec. 2x100 with 36v350w SMPS

Hi there,

Not so very long ago I ventured into the world of DIY audio; starting with modifying a V-DAC and finding out that my amp suddenly has become an "issue" (that was right after the speakers changed ). A long story short -and about a month later in time- I find myself here and reading up on more electronics then I actually bargained for . So after a couple of weeks of voyurism I'd like to say hello to you, the form dwellers!

In order to start my adventures in DIY amp land, I decided to start simple and buy a Sure Elec. 2x100 amp with a 36v 350w SMPS they advertise. I intend to tune that back to 32v and thus get the "optimal" performance for the setup as found in some threads around here. Later on (and depending on performance, I tend to go either towards Hypex or down the
Solid state route).

But first I want to start tweaking the Sure 2x100 and that's when the problems start. Because after reading up a LOT on this forum (and about a dozen often-cited suppliers) I find that either I need to REALLY dive into electronics to get a full grasp of what I'm doing or don't fiddle too much at all and buy better a kit.

In order to get this resolved I'd like the resident experts (and yes, there are a lot of you lurking around here...) to come up with a couple of "easy" solutions for people like me: interested but no expert. I can read resistance colouring but I can't design low-pass filters, I can solder but I have no clue about mosfet problems with caps on SMPS

And with that I'd like to introduce the main issue I'm facing right now: additional performance and filtering:

Obviously it should not be hard to place a larger capacitor bank after a SMPS to get more power if the going gets though (this is in-line with possible updating of modules later on as the 100w8Ohm output has a horrible THD), however there also are quite a few horror stories around about problems with sound (losing mids) and "pumping" (afaik storing voltage and thus blowing the amps). I've read up quite a bit (http://www.tnt-audio.com/clinica/ssps2_e.html stands out) but am still at a loss on how to exactly design and build this, can I simply assume it's the same as class A aplification? By looking at modules from Conexx. I can see they have simple designs but will that work on what I have? And so how about filtering? Ow did I mention I'm even more clueless about the voltage pumping and draining?

  Reply With Quote
Old 8th April 2010, 07:41 AM   #2
DennisF is offline DennisF  Netherlands
diyAudio Member
Join Date: Apr 2010
Location: Amsterdam
Send a message via MSN to DennisF
Default Additional items

Dear all,

Actually is another thing I'm looking for, which is available as a module from various vendors, but I could not find them here are DIY instructions...

Slowstart module
This probably will have some linkage with the power supply question above, but I've read somewhere the SMPS don't like the massive current required to fill the caps. So a simpel slow start circuit is high on the list as well.
  Reply With Quote


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
sure 2x100 hard sound? lbstyling Class D 3 9th November 2009 06:17 PM
Last column pricing at Rapid elec today len_scanlan Parts 1 31st January 2007 01:50 PM
Elec. bass cabinet midrange or tweeter jimmet Instruments and Amps 3 13th January 2006 02:54 PM
Source for elec schematics Gaber Digital Source 1 1st July 2003 08:16 PM
Marchand Elec. amps? Rolloatm76 Solid State 1 14th September 2001 11:26 AM

New To Site? Need Help?

All times are GMT. The time now is 07:58 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2