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Class D Switching Power Amplifiers and Power D/A conversion

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Old 3rd October 2012, 04:42 PM   #31
aarvin2 is offline aarvin2  Mauritius
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Quote:
Originally Posted by cotdt View Post
Dynamic range and realistic sound reproduction has more to do with the source/DAC than the amp. I would look into that first. Order of importance goes 1. speakers 2. source 3. amplifier.

Hi mate i'm not looking for speakers that fool me into thinking that the sound source is realistic ... I am looking for the TRUTH.

I am a mixing engineer and I want to hear what my naked source material sound like , I don't want my amp to compress the signal or the speakers to fool me.

I just wanna truth

Any advice on some affordable class-D amp that might do the trick ? Amps that are fully assembled (can't be bothered with DIY) I already DIY my speakers
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Old 3rd October 2012, 08:40 PM   #32
MrSlim is offline MrSlim  Canada
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How efficient are your speakers, and how loud do you want to listen to them ? That will help in determining how much power you need.. Having the required headroom in the amplifier is really the only way to prevent the output from being compressed (clipped)..

Also, do you intend to run the amp directly with your DAC?

How are you planning on adjusting the volume? Some of the Class D amps need a buffer between a directly connected volume pot and the amp input, or the high end frequency response tilts downwards as the pot resistance changes..

How much do you want to spend..??
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Old 4th October 2012, 09:39 PM   #33
aarvin2 is offline aarvin2  Mauritius
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The speaker is rated at 8W RMS and 16W peak I want them as loud as possible but while still keeping the dynamics intact ... what type of amp would you advise ?

The signal chain will be ... DAC ---> AMP >>>> speakers

Yes it would be nice to adjust the volume and it would be nice to have the volume consistent as I don't want any volume difference when 2 amps and 2 speakers are playing together at the same volume setting.

Could I have some information about the buffer please ?? I never heard about this before but your knowledge is really useful!!

I wanna spend like 300 USD ?
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Old 5th October 2012, 05:23 PM   #34
MrSlim is offline MrSlim  Canada
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What speaker driver are you using? (brand and model # would help).
The Wattage rating is not really related to the efficiency.. You need to look for something like

"SPL: 91 dB 1W/1m" for example..
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Old 5th October 2012, 08:45 PM   #35
aarvin2 is offline aarvin2  Mauritius
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Quote:
Originally Posted by MrSlim View Post
What speaker driver are you using? (brand and model # would help).
The Wattage rating is not really related to the efficiency.. You need to look for something like

"SPL: 91 dB 1W/1m" for example..

Tang Band W2-924SQ ...but the one I have is a custom made one, but has almost the same properties and efficiency etc ... only thing that it changed is the frequency response.

I would be very grateful if you could advise me on what type of amplification I would need to get the very best results in terms of super fast impulse response , minimum distortion, good damping factor , and highest dynamic range possible without clipping ... and with regards to the speaker specs ??

Thank you so so so much in advance!!!
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Old 6th October 2012, 01:07 AM   #36
MrSlim is offline MrSlim  Canada
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Ok, How many are you planning on using per channel? and What do you plan to use to cover the low end? The speaker you mention only goes down to 150 hz..
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Old 6th October 2012, 11:14 AM   #37
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Yea, I want the TRUTH too. I imagine a sound system that covers a whole wall. The sound coming out would reproduce the exact holographic image of the original sound wave that was recorded by a device that was the exact shape and size of the wall in your room, so the sound wave that you hear is an exact reproduction of the original sound wave. THE TRUTH. :-) SIGH!!!
But damn, we are stuck with speakers. ;-)

James
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Old 8th October 2012, 07:00 PM   #38
aarvin2 is offline aarvin2  Mauritius
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Originally Posted by MrSlim View Post
Ok, How many are you planning on using per channel? and What do you plan to use to cover the low end? The speaker you mention only goes down to 150 hz..
1 speaker per mono amp.

I'm not interested in anything below 150 Hz for the moment I want to get the one 'm doing all perfect.

Then i'll think about a sub if I need it

So have you got any tips ??
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Old 8th October 2012, 08:11 PM   #39
4real is offline 4real  Netherlands
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Dude, this is ridiculous... The thing is 85dB@1W and has a rated power of 8Watt, that means a wopping 9dB of extra headroom, giving you a total of 94dB of dynamic range. More is your single speaker not capable of. Even when stressing to the max power rating of 16Watt, it would only stretch to 97dB.
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Old 8th October 2012, 08:51 PM   #40
aarvin2 is offline aarvin2  Mauritius
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Quote:
Originally Posted by 4real View Post
Dude, this is ridiculous... The thing is 85dB@1W and has a rated power of 8Watt, that means a wopping 9dB of extra headroom, giving you a total of 94dB of dynamic range. More is your single speaker not capable of. Even when stressing to the max power rating of 16Watt, it would only stretch to 97dB.

Oh man thanks for your precision :O

What type of amp would you advise me then ?

I am a little bit confused about what the dynamic range means , we as engineers understand dynamic range as for example :

"a snappy attacky punchy snare has more dynamic range when compared to a compressed and flattened snare."

And i'd like those speakers to show those differences without any compromise.


Is it this type of dynamic range u're talking about or you mean dynamic range in an orchestra where it can be very soft and sometimes very loud?

Any advice on the class D amp that I should get please mate ?
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