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I'm relieved that the issue is resolved, undertowogt1! You will not be disappointed in what you hear.TL;DR: This amplifier is incredible... IF your speakers are not insanely hard to drive. If you've been debating, do it now. And not just sound - a sound that got me close enough to the Devialets to make me sell them. Here are the characteristics that stand out the most:* Impeccable control on the sub-100 Hz range * I'm not sure if I'm using this correctly, but the 'dynamic range' is fantastic. Its ability to deliver a bass punch to the gut and simultaneously rustling leaves in your ears is pretty neat.* The background is black as ink. Though, when I get closer there's a mild 120 Hz hum that I need to trace down. * The soundstage was wide when I used the standard Kemet + Vishay caps in the input stage. When I replaced those with Jantzen Superior, it became W I D E. The Jantzen took about 3-4 days to break in.* Micro details/voice texture could be more pronounced, but then again, the entire source is <$150, so that's likely the bottleneckThis weekend I took the amp to my friend's place who also has a Devialet 400, but with a pair of Magico Q1 (4~5 Ohms, 86 dB/w/m). Listening to it at medium volume (baby was sleeping), we couldn't hear any bass from 5-6 ft away. Swapped back to the Devialet and more music seemed to emanate at the same listening level. My speakers are supposedly 91 db/w/m sensitive, and simply rock at all volumes.The boards are really thoughtfully laid out and their quality is fantastic. As you can see, Jeremy is enthusiastic about helping and teaching. Super kudos to him. This is a wonderful and simple opportunity for one to create something of beauty *and* value.
Hi Folsom, I plan on using a Felix conditioner on my amplifier and in your "construction recommendations"you say to use x-caps on both sides of the cmc but earlier in this thread you stated to use the caps only in front of the cmc and not post.I am just looking for some clarification before I order the parts for the pcb.Also are the values stated : 1.8k/3watt resistors , 1uf.,.1uf., and .01uf. x-caps and Bourns 8120 cmc optimized for the 7297 amplifierFor the resistors would you use wire wound or metal film ?ThanksRobert
Theory: you know how in GI Joe, Cobra create their ultimate evil leader by combining the dna of hitler, ghenghis khan, atilla the hun, alexander the great, stalin and hannibal of carthage into one ultimate guy? I think Harmon International must have done something similar using the dna of Nelson Pass, John Curl, Douglas Self and Bruno Putzy to create Jeremy Folsom
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