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February 19, 2019, 04:29:46 PM *
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1  General Category / Technical discussion / Re: My Spectral DMA50 Amp on: February 05, 2019, 10:19:44 PM
I’ve quieted transformer hum by first making sure the laminates were tight, then checking the chassis mounts. I got lucky in that nothing happened to the windings themselves. Perhaps high temperature epoxy could be step three. Ed’s right though. It can be difficult to solve.

steve
2  General Category / Technical discussion / Re: My Spectral DMA50 Amp on: January 27, 2019, 12:16:19 PM
That’s what I’m wondering Ed. Sometimes transformers need to be tightened up.
steve
3  General Category / Technical discussion / Re: My Spectral DMA50 Amp on: January 26, 2019, 08:14:34 PM
Check dc offset

https://m.wikihow.com/Measure-DC-Offset
4  General Category / Technical discussion / Re: My Spectral DMA50 Amp on: January 26, 2019, 08:09:22 PM
Is the noise coming through the speakers, or is a mechanical noise from the amps themselves?
5  General Category / General Discussion / Re: Great Heil sale ending soon on: January 21, 2019, 09:52:05 PM
For those who missed out on the first sale, the big Heil drivers are now priced at $170 at the ESS site. I don’t know if shipping is included.

Edit: I checked about the shipping. Any order over $270 ships free.
6  General Category / General Discussion / Re: Great Heil sale ending soon on: December 29, 2018, 02:41:13 PM
Tod, I got it right away, and I laughed.

Happy New Year EVERYBODY.

steve
7  General Category / General Discussion / Re: Merry Christmas on: December 25, 2018, 12:16:18 AM
Merry Christmas Everyone.
And congrats Henry.
8  General Category / General Discussion / Great Heil sale ending soon on: December 21, 2018, 08:55:46 AM
PSA: The sale, damn near a giveaway, of the Heil drivers is said to end on January 2.
9  General Category / Technical discussion / Re: The Great Heils are almost free! on: December 12, 2018, 03:44:40 PM
I’m happy that Rico is doing well. I ordered a pair as well. The drivers arrived packaged like a fine watch or camera. (Or at least the way I think such things should be shipped.) The drivers were double boxed over the original package. Impressive.
10  General Category / The Truth Pre Amp / Re: pre-amp with balanced outputs on: December 06, 2018, 02:38:42 AM
Just for fun, I tried my Truth with 18’ lines, the longest I had. No problem at all. I have several preamps sitting on the shelf, and only two were up to the task. One has about a 30 Ohm output impedance, and the Truth which I believe has about 2-3 Ohm output impedance. I’m pretty sure you could run fifty feet of interconnect, seriously. Comment on that Ed?
steve
11  General Category / General Discussion / Marty Balin on: September 28, 2018, 07:39:04 PM
Marty Balin of Jefferson Airplane has passed. He was 76.
12  General Category / General Discussion / RIP Siegfried Linkwitz on: September 12, 2018, 01:19:47 PM
We lost an audio legend yesterday. After a long battle with cancer, Mr Linkwitz has passed. He is famous as the codeveloper of the Linkwitz-Riley crossover along with Russ Riley. His Linkwitz Lab website is the treasure trove of loudspeaker design. His Orion and LX521 loudspeakers are absolutely world class. Nobody’s done it better.
I had the pleasure to talk to him on a few occasions. He was very helpful, and always a gentleman.
Rest In Peace.

steve
13  General Category / General Discussion / Boozehound on: August 15, 2018, 07:05:57 PM
Has anyone built a Boozehound phono kit? I know Ed has used some of their stuff.
steve
14  General Category / Technical discussion / Re: Amp Camp Amp is back on: July 22, 2018, 02:25:01 PM
Henry, I know you were running model 2 Horns. Do you use a series or parallel connection? If the amp camp amps can handle a 4 Ohm load, you should get some serious impact. BTW, I think the model 2 is superior to the original Horns. Don’t know why, but when experimenting using two Horns on one side, the sound was, well subjectively, just more relaxed. Dynamics were there.
Build pics as you go please.
steve
15  General Category / Technical discussion / Re: Amp Camp Amp is back on: July 20, 2018, 07:42:06 PM
Henry, that’s really cool. I can’t use amps that small these days, but it’s sure tempting. Pass does great designs.
steve
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