Anything wrong with Treshold "T" series??

I have not listened to the T series, but own the Threshold S300 and the S550E. Both are excellent, with the latter wining out in just sheer power and room and better defined and deeper low-end.

The "T" series makes use of output devices that are no longer available from what i understand. Having owned several amps that made use of similar circuitry with the same devices and pounding on them day after day, i would not worry about this too much if you like the amp. Just pay attention and be careful like you would with any other electronic component. Sean
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Sean is correct. The T series used IGBT transistors which is a cross between bipolar and MOSFET. I think Toshiba and International Rectifer used to manufacture them but not anymore.

Hi Chazzbo,
I've not heard of any problems with the T series. I could be that the dealer is a Nelson Pass design fan, and is just somewhat biased against the T, which Nelson was not involved with. Jon Solderberg of Vintage Amp.com you tell you more if you have a specific question. Like Sean, I have an S350E (inbetween the S300 and S550E), and a FET 10E pre. They are excellent, and I highly recommend them. There is a very clean S300II on eBay right now for an attractive price, but I wouldn't be afraid of a T. I do think you can get more amp for the $ with an S, as they are older. Log on to Vintage and ask Jon about the amp you are looking at. Tom

Sean is correct - the Hybrid FET-bipolar output stage (IGBTs) is no longer available, though I believe the new Threshold Audio, Inc. will bring select T-series up to current spec(for a price, of course). Jon Soderberg also works on vintage Threshold amps and will also work on the T series, though that might entail swapping out the IGBTs for a traditional output stage.

In any event, the T series was terrific, particularly the T200 - I've got one myself. They are indeed built like tanks, but nothing lasts forever...

If the price is right, go for it!

Jim