Hiraga Monstre with SMPS?

weissi · 10th April 2008, 01:07 AM

Hi,

I have two dozen of 12V/60W SMPS (Iripple = 120mV @ 5A load).
As i'm in need for a tweeter amplifier (B&G Neo3... 4Ohms), what do you think, would the monstre be an adequate driver?

Currently, tweeters are driven by a LM4766 configured in parallel, running off +-12V from exactly the same SMPS I've mentioned before.

I thought of using some sort of LowPass Filter for the input stage (or even spending a separate regulated linear supply for the input stage). SMPS switching frequency is ~70Khz.
Output caps inside the SMPS are 2x Chemicon KZE 1500µ || 2x OS-Con 470µ, so ripple current should not be a problem.

Monstre build will be the updated version with 2SK170/2SJ74, BC550/BC560 and Power Transistors t.b.d. .

I know this is a quite an "uncommon" approach to Class A, but I'll be happy for any comments.

Cheers

flshzug · 25th July 2008, 09:47 PM

hi, how this went ? Survived the "drawer" ?

Im very interested let me know,

weissi · 25th July 2008, 10:44 PM

Hi, no just finished assembling some other amplifier boards. Will see how this idea will continue.

10th April 2008, 01:07 AM	#1
weissi diyAudio Member Join Date: Sep 2002 Location: Austria	Hiraga Monstre with SMPS? Hi, I have two dozen of 12V/60W SMPS (Iripple = 120mV @ 5A load). As i'm in need for a tweeter amplifier (B&G Neo3... 4Ohms), what do you think, would the monstre be an adequate driver? Currently, tweeters are driven by a LM4766 configured in parallel, running off +-12V from exactly the same SMPS I've mentioned before. I thought of using some sort of LowPass Filter for the input stage (or even spending a separate regulated linear supply for the input stage). SMPS switching frequency is ~70Khz. Output caps inside the SMPS are 2x Chemicon KZE 1500µ \|\| 2x OS-Con 470µ, so ripple current should not be a problem. Monstre build will be the updated version with 2SK170/2SJ74, BC550/BC560 and Power Transistors t.b.d. . I know this is a quite an "uncommon" approach to Class A, but I'll be happy for any comments. Cheers __________________ regards / servus

25th July 2008, 10:44 PM	#3
weissi diyAudio Member Join Date: Sep 2002 Location: Austria	Hi, no just finished assembling some other amplifier boards. Will see how this idea will continue. __________________ regards / servus

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25th July 2008, 09:47 PM	#2
flshzug Banned Join Date: Dec 2007	hi, how this went ? Survived the "drawer" ? Im very interested let me know,

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