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Sansui AU-X1

Au-x1

Tom

Thank you very much, a wealth of information for me here. Thanks for responding

Marc
 
Tomcam, welcome to AudioKarma Sansui Forum. It is always a pleasure to have a new and knowledgeable enthusiast. I hope you come back often.

- Pete
 
Arkay said:
I found an AU-555 in one of the wholesale places here with knobs that had been painted black like that. The good thing was that because they had used paint that could be removed, it was reversible. If you anodize the knobs (assuming they are aluminum on the model you are considering, and not plastic), then you or any future owner will not be able to reverse/restore the color. Something to consider.
Click to expand...

Not true. We use anodizing at my work on a daily basis and it can be stripped the same way it is applied with an electrical current. So you can go from Black to clear or vice versa if need be, although for someone without access to an anodizer this could be an issue as they usually have a minimum lot charge and frown on small orders.
P.S. as ARKAY has noted this applies only to aluminum parts.
 
I've got an AU-X1, picked up for $5 ude to it 'not working' and having 2 of the bottom set of speaker binding posts broken. $320 later (and with Warrens' stability mods in place) it works fantastically. I can't compare it to other Sansui amps mentioned, as I've only got an AU-417 and an AU-222 - which it beats hands down. And that in both sound (or lack of), bass control and heft (my term for the ability to control the drivers on a speaker).

It does need a touch up with the magic black paint - but the magic smoke is all inside now...:)
 
Working is an understatement!. My tech tested it after he'd finished repairing it and it drive to 260w/ch before clipping started. And then he took it upstairs (with help) and used it in his own system for a couple of weeks. He liked it so much that he made a couple of boards based exactly on the AU-X1 boards (shrinking them 10% so that they would fit in his current amp - I think it was the F2775) and now uses them!

Warren, your mods are excellent.

Unfortunately, it's the only AU-X1 I've seen for sale in Aus in the last 3 years...
 
Hi Warren,

Had a little melt-down in the AU-X1. My tech said:
"The fault went through it like the proverbial packet of salts. I blame the massive melt down on the lack of fuses in the HT rails to the power stage. If you want to be really picky, fuses add a lttle impedance in series with the supply. They would not blow otherwise. In the event of a fault, the relays drop out thus protecting the speakers. The full supply is still present in the amp, and just keeps on pushing.
I have added a pair of fuses to both rails of each channel. They are 6.3 amps and will not blow under normal usage. I ran the amp up to 190 watts in to 8 ohms no probs. They are mounted underneath near the output modules."

Apparently the resistors got hot enough to melt one of the boards, so now I have even more protection for my AU-X1. I get it back next weekend (just haven't had the time) and we'll see if it sounds any different...
 
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