Picked up an Art SLA2, found the internals interesting

xyrium · 24th February 2010, 12:46 AM

Hey Guys,

I haven't been here in a while, but figured I'd post and ask around. I bought an Art SLA2 amp to power a pair of tweets in an active config. I popped the hood on it, and found one transistor per side and a large circumference toroid in the center. The latter being large in circ. since the amp is extremely low profile.

This said, is it detrimental to have only one transistor per side? In the past, all of the amps I've purchased had at least a few per channel (4 or more).

Thanks!

djk · 24th February 2010, 01:36 AM

Search for Gainclone.

xyrium · 24th February 2010, 02:37 AM

Ahh yes, good point. Does this look familiar to anyone? I know it's a terrible picture, and the chip appears nondescript, but it's the best I could do in tight quarters..

Zero Cool · 24th February 2010, 03:12 AM

that's the power supply rectifier

xyrium · 24th February 2010, 11:54 AM

Wow, and all this time I thought designers heat sink the transistors. Further images...

djk · 24th February 2010, 12:20 PM

I see four outputs per channel, each with a 0R22 emitter resistor.

xyrium · 02:12 PM

Thanks djk. So, how does the build look to you guys? I mean, for a $289 amp?

Bonsai · 25th February 2010, 11:08 AM

made in china?

VivaVee · 25th February 2010, 06:16 PM

Quote:

Originally Posted by xyrium

Wow, and all this time I thought designers heat sink the transistors. Further images...

If you look closely at the top left and right of the second picture you will see two 0R22 resistors and two sets of three leads poking up through the board. So there are two transistors mounted under the board, presumably touching the heatsink on each end of the board, making four output(?) transistors per channel.

It looks cheaply made but then it was cheap (although my understanding of what else you might buy for the money in the US is very limited). That may well make it reasonable value

xyrium · 25th February 2010, 08:54 PM

Taiwan, though obviously part of China, a friend of mine says the quality out of Taiwan is supposed to be higher than in mainland China. There's a historical reference that was made during his explanation. Either way, my Parasound A23 is made in Taiwan as well. So far, so good.

Quote:

Originally Posted by Bonsai

made in china?

24th February 2010, 12:46 AM	#1
xyrium diyAudio Member Join Date: Apr 2005 Location: NJ	Picked up an Art SLA2, found the internals interesting Hey Guys, I haven't been here in a while, but figured I'd post and ask around. I bought an Art SLA2 amp to power a pair of tweets in an active config. I popped the hood on it, and found one transistor per side and a large circumference toroid in the center. The latter being large in circ. since the amp is extremely low profile. This said, is it detrimental to have only one transistor per side? In the past, all of the amps I've purchased had at least a few per channel (4 or more). Thanks!

24th February 2010, 01:36 AM	#2
djk diyAudio Member Join Date: Feb 2001 Location: USA	Search for Gainclone. __________________ Candidates for the Darwin Award should not read this author.

24th February 2010, 12:20 PM	#6
djk diyAudio Member Join Date: Feb 2001 Location: USA	I see four outputs per channel, each with a 0R22 emitter resistor. __________________ Candidates for the Darwin Award should not read this author.

24th February 2010, 02:07 PM	#7
xyrium diyAudio Member Join Date: Apr 2005 Location: NJ	Thanks djk. So, how does the build look to you guys? I mean, for a $289 amp? Last edited by xyrium; 24th February 2010 at 02:12 PM.

25th February 2010, 11:08 AM	#8
Bonsai diyAudio Member Join Date: Aug 2006 Location: Taipei, Taiwan	made in china? __________________ bonsai http://www.hifisonix.com/


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24th February 2010, 03:12 AM	#4
Zero Cool Audio Junkie diyAudio Member Join Date: Sep 2004 Location: MN	that's the power supply rectifier

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