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Class D Switching Power Amplifiers and Power D/A conversion

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Old 18th September 2013, 10:58 AM   #751
vdij is offline vdij  Moldova
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I will try if it works. How to attach a file?

Last edited by vdij; 18th September 2013 at 11:04 AM.
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Old 18th September 2013, 02:13 PM   #752
vdij is offline vdij  Moldova
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please
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File Type: zip lay 2092.zip (39.2 KB, 155 views)
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Old 19th September 2013, 12:40 AM   #753
exflaco is offline exflaco  Armenia
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Thanks vdij good work
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Old 19th September 2013, 12:52 AM   #754
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Quote:
Originally Posted by Stammheim View Post
I had a look at the document and yes, that's the ~ +-5,4V behind the resistor. So the IRS is fed by the +-5,4V I already told. But as I have found nowhere I need to know, which voltage range the IRS can be powered, and if I implement an own power supply for the IRS, which voltage I have to put in. Of course I could go the easy way and also limit the voltage to the 5,4V, but because I would go with a 2x6V (or 2x7V) transformer it's important to know, if I have to use some voltage regulators to limit voltage.

Many thanks,

Stammheim
There is an internal zener that limits the voltage to around 7 volts.
To be safe I wouldnt go above +/- 5 volts.
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Old 19th September 2013, 07:56 AM   #755
vdij is offline vdij  Moldova
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Quote:
To be safe I wouldnt go above +/- 5 volts.
exactly
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Old 19th September 2013, 08:01 AM   #756
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Quote:
Originally Posted by nigelwright7557 View Post
There is an internal zener that limits the voltage to around 7 volts.
To be safe I wouldnt go above +/- 5 volts.
Thanks, I'll try this out. Do you also know the ampere-consumtion per IC? I guess a 15VA transformer should be enough for 8 IC's...?
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Old 20th September 2013, 03:26 PM   #757
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I just checked the 2092... so for everybody interested, the 2092 gets 11mA per rail (+-) with 5,4V. So yes, my 15VA transformer should do the job for the 8 amps...
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Old 20th September 2013, 05:23 PM   #758
vdij is offline vdij  Moldova
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thank you
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Old 8th October 2013, 10:30 PM   #759
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Quote:
Originally Posted by redjr View Post
Noah,

I guess another way to describe these (2092 based) class D amps is that they are 'lively' compared to other SS or class A, A/B amps.
Interesting. The Classdaudio.com IRS2092 amps (that started the IR craze) do not sound lively or edgy or anything like that at all. By and large the feedback has been the opposite: laid back, warm, tubey. That's been my experience as well. However from time to time there have been users who say their experience is edgy, thin, etc. So I can't help but think there is a system matching thing to be figured out. My speakers measure pretty flat and the last word I would use to describe the classdaudio.com IR amps is 'lively'.
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Old 9th October 2013, 02:44 AM   #760
redjr is offline redjr  United States
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Quote:
Originally Posted by wushuliu View Post
Interesting. The Classdaudio.com IRS2092 amps (that started the IR craze) do not sound lively or edgy or anything like that at all. By and large the feedback has been the opposite: laid back, warm, tubey. That's been my experience as well. However from time to time there have been users who say their experience is edgy, thin, etc. So I can't help but think there is a system matching thing to be figured out. My speakers measure pretty flat and the last word I would use to describe the classdaudio.com IR amps is 'lively'.
Perhaps it's my speakers then that produce that lively sound - but I don't necessarily think so. IMO, it's anything but tube-esk like sound. Having said that though, the only class D audio amp that I hold in esteem is the class D ICE amp modules that Pioneer uses in their SC-xx HT receiver line. I've said it before and I'll state it again; they are the smoothest amps I've heard this side of the high-end audio - which I've heard very little of. And they continue to best any class D amp I've built. For sure, Pioneer and AirStudios have optimized the sound for HT use, but even in Pioneer's Pure Direct mode (no DSP), I could listen to them for hours without any fatigue whatsoever. It's like smooth butter to your ears.

In fairness, my IRS2092 amp was connected to bookshelf speakers, so I wasn't ever listening at reference levels or trying to fill a large room with big sound. But those same, simple speakers sounded marvelous with the ICE amps. I say was, only because I don't currently have it hooked up to any system, since I just moved and in the process of building out my listening/mancave room.

Some people scoff at the little LJM 2092 modules, but for a budget amp I'm quite happy with the way they sound. I've never had one hooked up to a sub-woofer either, so that would make a big difference in the amount of bass I hear from my garden variety bookshelf speakers. To each his own I guess.
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