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Old 24th February 2010, 12:46 AM   #1
xyrium is offline xyrium  United States
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Default 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!
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Old 24th February 2010, 01:36 AM   #2
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Search for Gainclone.
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Old 24th February 2010, 02:37 AM   #3
xyrium is offline xyrium  United States
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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..
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Old 24th February 2010, 03:12 AM   #4
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that's the power supply rectifier
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Old 24th February 2010, 11:54 AM   #5
xyrium is offline xyrium  United States
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Wow, and all this time I thought designers heat sink the transistors. Further images...
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Old 24th February 2010, 12:20 PM   #6
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I see four outputs per channel, each with a 0R22 emitter resistor.
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Old 24th February 2010, 02:07 PM   #7
xyrium is offline xyrium  United States
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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.
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Old 25th February 2010, 11:08 AM   #8
Bonsai is offline Bonsai  Taiwan
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made in china?
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Old 25th February 2010, 06:16 PM   #9
VivaVee is offline VivaVee  New Zealand
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Quote:
Originally Posted by xyrium View Post
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
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Old 25th February 2010, 08:54 PM   #10
xyrium is offline xyrium  United States
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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.

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made in china?
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