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almarg

Responses from almarg

PrimaLuna Dialogue Premium Preamplifier. DESTROYS SPEAKERS!!
DC input protection should be de rigeur for most amps, especially one with such high current you could weld with it. Hi Erik,See my earlier posts in this thread. It appears more likely than not that the amp **does** have DC input protection, in th... 
Long distance between preamp and power amp
Dentdog, I don't see any issues with what you've described.  In fact the design of the Leto seems ideally suited to a situation involving a lengthy connection to an unbalanced input. John Atkinson's measurements of the output impedances of the Let... 
Long distance between preamp and power amp
I couldn’t find an output impedance spec on the C712, or anything that would provide an indication of how its balanced outputs are generated. But given that it is a solid state design chances are its output impedance is relatively low. And given t... 
PrimaLuna Dialogue Premium Preamplifier. DESTROYS SPEAKERS!!
Thorloki 9-24-2017 Mr. Deal, I ask you this, are you going to recall all the pre amps, THAT YOU HAVE ALREADY SOLD and are in customers systems?Or, are you just going to lay low and hope that clients with blown speakers don’t make the connection to... 
Long distance between preamp and power amp
There’s no reason to consider selling such a fine amp. If it proves to be necessary you could connect a suitably chosen Jensen transformer (ca. $275) between the preamp and the amp (close to the amp), to convert balanced to unbalanced. That would ... 
Synergistic Red Fuse ...
Tom (Theaudiotweak), thank you for the comprehensive response to my previous post.Best regards,-- Al  
PrimaLuna Dialogue Premium Preamplifier. DESTROYS SPEAKERS!!
UpscaleAudio9-23-2017 It was a small cap in the right channel, NOT the Mundorf coupling caps. We suspect an oscillation as my service tech here works for another brand that was faced with the same problem. Kevin, thanks for providing us with the c... 
Synergistic Red Fuse ...
@rauliruegas & @nonoise, thank you for your gracious and reasonable responses to my previous post.To some of the other recent posters: Regarding "I am there" vs. "they are here," the following thread from 2010 may be of interest, in which ther... 
PrimaLuna Dialogue Premium Preamplifier. DESTROYS SPEAKERS!!
Thorloki 9-22-2017 The amplifier used was the Bryston 28B SST3 1,000 watt per channel mono blocks.... Thorloki 9-22-2017As for Bryston amps DC protection, I personally spoke to Mr. Brian Russell, one of the owners of Bryston, and he ASSURED me, th... 
Synergistic Red Fuse ...
Rauliruegas 9-22-2017 I decided to do it thinking that if  the power line now is fully regulated and bullet proff with surge protrectors then the item input fuses are just out of the " equation ", we don't need it any more. Nonoise 9-22-2017 I... 
Synergistic Red Fuse ...
Thank you, Tom (Theaudiotweak). Based on your input I was able to find the patents listed here that have been granted to Mr. Denney, under his own name. However, as far as I can see none of them appear to be related to fuses.Regards,-- Al   
Synergistic Red Fuse ...
Thank you, Tom (Theaudiotweak). For the record, though, his name is spelled "Denney," not "Denny." That misspelling has also been made by a number of others during the course of this thread.The only mention of SR or any of its products I found ... 
Synergistic Red Fuse ...
Wolf_Garcia 9-21-2017Anybody able to locate the above mentioned "UEF Tech" patent? I'd be interested in whatever the heck THAT says. Wolfie, I did a search at the U.S. Patent Office website (uspto.gov) of both granted patents and patent applicat... 
Member's recommendations for tube amplification
David, we’ll see what Ralph has to say, but I would be skeptical about the suitability of the S-30 for use with a 4 ohm speaker, albeit one that apparently has a particularly flat impedance curve, given the amp’s 7 ohm output impedance and also it... 
Test Equipment vs The Ear
Not everything that is audible is measurable, and not everything that is measurable is audible.  There is probably no practical limit to the number of examples that could be cited to illustrate each of those two cases. To the designer, measurement...