Class D kits for bass guitar amp?? - Page 3 - diyAudio
Go Back   Home > Forums > Live Sound > Instruments and Amps

Instruments and Amps Everything that makes music, Especially including instrument amps.

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 24th February 2010, 03:25 PM   #21
AP2 is offline AP2  Italy
Banned
 
Join Date: Dec 2009
Location: Italy
ok, there is no psu switch for esoteric use of amplifier, then we must convince ourselves that the amplifier can corregir the PSU.
now there a PSU for esoteric use.
stabilized with 150ns response time, free IMD Vs. amplifier,no ripple (zero) at 600w (4R).
excellent power factory.
ultra compact,no big capacitors use.
2 years of development, custom trafo, development a complex asic for running this new architecture "RIPS".
not competitive? ...I think that is unique in the world at the moment
  Reply With Quote
Old 24th February 2010, 05:52 PM   #22
AP2 is offline AP2  Italy
Banned
 
Join Date: Dec 2009
Location: Italy
Hi,
I think this pic is clearer, has more info for this new amplifier.

Regards
Attached Images
File Type: jpg DPA-600.jpg (95.0 KB, 346 views)
  Reply With Quote
Old 25th February 2010, 05:22 AM   #23
diyAudio Member
 
Join Date: Sep 2003
Location: -
Quote:
Originally Posted by AP2 View Post
Hi,
I think this pic is clearer, has more info for this new amplifier.

Regards
Hi AP2,

You are very much enthusiastic about this product, are you the developer or do you have any other (commercial?) direct relation with the manufacture?
  Reply With Quote
Old 25th February 2010, 06:22 AM   #24
AP2 is offline AP2  Italy
Banned
 
Join Date: Dec 2009
Location: Italy
Hi Jean-Peter,
is normal that are taken from a lot of enthusiasm.
developing new real amplifier (research to eliminate certain defects of all Class D amplifier)
no classic schematics and not typical chip Class D use.
this amplifier is not recognized as a big mospower class AB in an anechoic chamber by audiophiles (cd player direct connected). this is the greatest satisfaction for the immense work that was done by the team.
PSU.
research for this new architecture (2 years) solves some problems on Avionics parts.
this alone could justify the investment.
I am an engineer (physical electronics) and am part of the MDI team.
when the commercial side is much contention as you can well imagine.
But .. why do you ask? You are Hypex man, the market is free, everyone has their own products.

You would have the same enthusiasm?
Regards
  Reply With Quote
Old 25th February 2010, 06:38 AM   #25
diyAudio Member
 
Join Date: May 2002
Location: Switzerland
If the module shown (with PSU included) is the one that will be available around 300 Euros then the price IS competitive - OK.

Regarding PSU ripple compensation: Good ripple compensation is intrinsic to self oscillating class-d amps.
With carrier-based amps one soution is to amplitude-modulate the triangular carrier as a function of PSU voltage. Don't know how old this idea already is at the moment - but the first patent may be even old enogh to have ceased already. Would have to take another look at that because it many years that I had a look at that. The TI chip mentioned by 81bas is a fine example for a modern integrated carrier-based amp.

The same questions as Jan-Peter asked came up in my mind as well.

Regards

Charles
  Reply With Quote
Old 25th February 2010, 06:38 AM   #26
diyAudio Member
 
Join Date: May 2002
Location: Switzerland
deleted double posting - maybe a mod can remove the remainder as well !

Last edited by phase_accurate; 25th February 2010 at 06:41 AM. Reason: double posting
  Reply With Quote
Old 25th February 2010, 06:45 AM   #27
AP2 is offline AP2  Italy
Banned
 
Join Date: Dec 2009
Location: Italy
Phase_Acurate:
If the module shown (with PSU included) is the one that will be available around 300 Euros then the price IS competitive - OK.
---------------------------------------------------
if I have to be realistic, this is competitive even if cost 500 .
a pair of these in a case (wood and aluminum) 1U or 2U, finally the audiophile is happy without spending 6000
Regards
  Reply With Quote
Old 25th February 2010, 08:27 AM   #28
81bas is offline 81bas  Germany
diyAudio Member
 
Join Date: Jan 2006
Location: Kiel
Quote:
Originally Posted by AP2 View Post
no classic schematics and not typical chip Class D use.
I like to see the optocouplers in this amp instead of some usual low/hi side integrated mosfet driver. No lockup problems, less requirements to the dv/dt characteristic, etc.
  Reply With Quote
Old 25th February 2010, 08:53 AM   #29
AP2 is offline AP2  Italy
Banned
 
Join Date: Dec 2009
Location: Italy
Hi,
for this performances ... were necessary 100ns, from modulator (outstage) to mosft gate,with custom dt.
somehow this has been achieved.

Regards
  Reply With Quote
Old 28th April 2010, 05:52 PM   #30
savu is offline savu  Romania
diyAudio Member
 
savu's Avatar
 
Join Date: Feb 2007
Location: Cluj - Napoca
Send a message via MSN to savu Send a message via Yahoo to savu
Quote:
Originally Posted by AP2 View Post
Hi,
I think this pic is clearer, has more info for this new amplifier.

Regards
hello one question:

what does "rips uses 3 high speed mosfet to rotate pulses in trafo" ?

regards
__________________
1'st rule of chess:
The only way to get smarter is by playing a smarter opponent.
  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
High gain guitar preamp kits! Hybrid_Child Tubes / Valves 1 15th July 2009 05:18 PM
4x12 Guitar cab using guitar and bass speakers help andrewskaterrr Instruments and Amps 15 23rd April 2009 11:43 PM
Cheap guitar amp kits? leadbelly Instruments and Amps 7 25th July 2008 04:03 PM
any electric bass players? im building a bass guitar cab KOA Instruments and Amps 27 30th April 2007 03:49 PM
tube/valve bass amp kits achtung jackass Instruments and Amps 0 3rd October 2005 08:50 PM


New To Site? Need Help?

All times are GMT. The time now is 02:09 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