Class D Audio Amplifiers - Page 16 - diyAudio
Go Back   Home > Forums > Commercial Sector > Vendor Forums > Inactive Vendor Forums > Connexelectronic

Connexelectronic Commercial Vendors large & small hawking their wares

 
 
Thread Tools Search this Thread
Old 25th July 2012, 08:27 AM   #151
diyAudio Member
 
Join Date: Sep 2011
If I ran three 400W IRS2092 modular amplifiers for LCR 8ohms speakers could I use the one SMPS800R? Would the output for 8R be 200W per channel?

I am also very interested in the 12V trigger question, as I will run these amplifiers from my AV Receiver as a preamp.

Last edited by zanlation; 25th July 2012 at 08:30 AM.
 
Old 31st July 2012, 11:36 AM   #152
diyAudio Member
 
Join Date: Dec 2008
Location: Hong Kong or Europe
for whatever reason, I didn't get any notification that a new message was posted, and I just saw your question now.

If the total power required by the amplifiers is below or same as the rated power of the SMPS, then the amplifier modules can be supplied with SMPS800R. thus if the 400W version modules are used with 8R load, the output power will be just ~200W on 8R, within the limits.

each IRS2092 amplifier module has mute control pin which is active when is pulled low, or connected to GND. default more is run, so if you want to use a 12V trigger, you need to make a simple NAND circuit using n diodes (3 for 3 modules) one NPN transistor and two 2k2 and 4k7 resistors.
__________________
www.connexelectronic.com complete assembled amplifier and SMPS
 
Old 22nd September 2012, 07:18 AM   #153
4real is offline 4real  Netherlands
diyAudio Member
 
Join Date: May 2004
Location: Arnhem
Default What to pick?

Hi there,

I'm wondering what amplifier modules I should choose for my future setup: openbaffle WMTM needing 3 or 4 channels (3 if I parallel the mids). I specially need some power in de bass department, but would like to use the same amps on all channels. All units are 8R, except when parallelling the mids. It will be connedted to a minidsp 4x10HD.

So my thoughts went out to the IRS2092 Stereo Amplifier, 400w to be on the safe site, two modules powered by one SMPS800R@60V. Wtonof those sets should be able to power my OB's I guess.

But what would be reasons not to pick the stereo modules, but go for the CxD400 or CxD300(not balanced)?
 
Old 22nd September 2012, 04:02 PM   #154
diyAudio Member
 
Join Date: Dec 2008
Location: Hong Kong or Europe
If the required power is in rage of 200-300W on 8R, I suggest to chose CxD300-8R modules. If more power is needed, CxD400 module can be configured to deliver up to 400W on 8R or IRS2092 stereo amplifier, latest version being able to deliver over 700W on 4R or 400W on 8R on each channel.
__________________
www.connexelectronic.com complete assembled amplifier and SMPS
 
Old 22nd September 2012, 06:26 PM   #155
4real is offline 4real  Netherlands
diyAudio Member
 
Join Date: May 2004
Location: Arnhem
But CxD300 does not have balanced inputs, CxD400 and the stereo amp does. The question is: what actual use is it, since the IRS has single ended input?

Last edited by 4real; 22nd September 2012 at 06:31 PM.
 
Old 23rd September 2012, 03:29 AM   #156
4real is offline 4real  Netherlands
diyAudio Member
 
Join Date: May 2004
Location: Arnhem
... Well, one of the uses might be high impedance. What are the input impedances of all the amps?
 
Old 23rd September 2012, 03:09 PM   #157
diyAudio Member
 
Join Date: Dec 2008
Location: Hong Kong or Europe
CxD400, CxD250-HP and IRS2092 Stereo amplifier have balanced input, with input impedance 20Kr. CxD300-8R and IRS2092 modular amplifier does not have balanced input and their input impedance is 3K. Their input need to be buffered to provide matched impedance. There are several advantages of using balanced input, the noise imunity is higher, and in multi-channel designs the GND loop effects can be easily avoided or reduced if one of the inputs, usually inverted one is tied to GND at the signal source point. Also it allows easier BTL connection by simply swapping inverted input with non-inverted input of one of the channels which has to be 180* out of phase.
__________________
www.connexelectronic.com complete assembled amplifier and SMPS
 
Old 25th September 2012, 05:14 AM   #158
4real is offline 4real  Netherlands
diyAudio Member
 
Join Date: May 2004
Location: Arnhem
Thanks Cristi, so I'm back at CxD400 or Stereo amp. Can you give us the gain values of the different amps and power options? I'd like to know to match the right gain with the miniDSP output.
 
Old 25th September 2012, 06:27 PM   #159
diyAudio Member
 
Join Date: Dec 2008
Location: Hong Kong or Europe
The voltage gain for CxD400 400W version is 33.5 or 1.2V input signal sensitivity for full output power. values of gain in range of 28 to 40 (input sensitivity of 1 to 1.4V) can be set by changing the value of one or two resistors.
__________________
www.connexelectronic.com complete assembled amplifier and SMPS
 
Old 26th September 2012, 05:06 AM   #160
4real is offline 4real  Netherlands
diyAudio Member
 
Join Date: May 2004
Location: Arnhem
The CxD400 does only list one supply voltage range. Is that for both 200W and 400W versions?
And what about the gain of the Stereo module?
 

 


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
non surface mount class D mono audio power amplifiers Conor Digital Source 10 4th October 2013 07:38 PM
Single-Ended Class-A Audio Amplifiers shaan Everything Else 32 4th September 2009 02:42 AM
pro amplifiers vs. home audio amplifiers bonsai171 Solid State 26 25th February 2004 08:24 PM
Class A vs. IC amplifiers for PC audio Beggar Solid State 15 26th July 2002 11:58 AM


New To Site? Need Help?

All times are GMT. The time now is 02:48 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
Copyright 1999-2015 diyAudio

Content Relevant URLs by vBSEO 3.3.2