Cary 300 SEI with HUM in Noise Floor

Posted by daleda (A) on March 9, 2007 at 15:23:28

After exhaustive searches here - I've decided to post. I use this SET amp with headphones only (Senn HD650 w/ Mobius 300 ohm and JVC/Victor DX1000 60 ohm cans). There is the very annoying mechanical hum in the noise floor - more noticeable with the lower ohm cans). I've checked all tubes - I use WE (new) 300B and Tung Sol Black Plate 6SN7 driver and Sylvania Chrome Top 6SN7W Short Bottles. This baby even went back to Cary recently for a bias resistor that blew - and while there checked for this hum - and it returned with, you guessed it, the same mechanical hum. I've hooked up a small set of monitors and the same low-level noise is still there also. I've made sure the transformers are tightly screwed down and pretty much traced down every possible source. I use a high grade PC into an Audio Magic Stealth PC (or even straight into the wall) - hum still there. I have seen multiple posts that this is just the SET Faustian bargain - and some inmates have gone as far as to just sell the damn thing! I'm almost there - even thought I must admit to a midrange and dynamic audio spectrum unmatched to these old ears. Cary has been most unhelpful - and don't seem to want to admit a design flaw (even though there are many, many complaints as to the contrary. Any input would be much appreciated before she goes to Agon soon (a last resort).

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Topic - Cary 300 SEI with HUM in Noise Floor - daleda 15:23:28 03/09/07 (19)

I see you decided to sell the unit - korneluk 03:33:09 03/15/07 (0)

Re: Cary 300 SEI with HUM in Noise Floor - korneluk 15:00:34 03/12/07 (1)

Re: Cary 300 SEI with HUM in Noise Floor - daleda 15:25:49 03/12/07 (0)

Here's a few odd things to try..... - chris keating 12:56:31 03/12/07 (1)

Re: Here's a few odd things to try..... - daleda 15:30:09 03/12/07 (0)

Dump the over-priced and bad sounding CARY...Don't waste your time in it. - cids 19:08:54 03/11/07 (0)

Re: Cary 300 SEI with HUM in Noise Floor - Paul Joppa 18:31:45 03/09/07 (12)

Re: Cary 300 SEI with HUM in Noise Floor - daleda 18:55:33 03/09/07 (11)

Re: Cary 300 SEI with HUM in Noise Floor - Paul Joppa 23:32:33 03/09/07 (10)

Re: Cary 300 SEI with HUM in Noise Floor - daleda 07:58:49 03/10/07 (9)

Re: Cary 300 SEI with HUM in Noise Floor - Sherlock 09:47:44 03/10/07 (8)

Re: Cary 300 SEI with HUM in Noise Floor - daleda 13:11:11 03/10/07 (7)

Re: Cary 300 SEI with HUM in Noise Floor - Sherlock 10:17:18 03/11/07 (0)

Re: Cary 300 SEI with HUM in Noise Floor - recstar24 22:28:41 03/10/07 (5)

Re: Cary 300 SEI with HUM in Noise Floor - Paul Joppa 15:12:07 03/11/07 (2)

Re: Cary 300 SEI with HUM in Noise Floor - recstar24 15:43:05 03/12/07 (1)

Re: Cary 300 SEI with HUM in Noise Floor - Paul Joppa 21:59:31 03/12/07 (0)

Re: Cary 300 SEI with HUM in Noise Floor - daleda 12:44:50 03/11/07 (1)

Re: Cary 300 SEI with HUM in Noise Floor - SETdude 14:36:54 03/11/07 (0)

Cary 300 SEI with HUM in Noise Floor

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