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Vintage Asylum Classic gear from yesteryear; vintage audio standing the test of time. |
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Vintage Asylum Classic gear from yesteryear; vintage audio standing the test of time. |
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In Reply to: RE: Advent Evolution posted by Crazy Dave on June 26, 2015 at 08:18:20:
Dave,
It's nice to be back! I missed you guys; but I was into other hobbies and didn't have a lot to say.
No, I'm not into woodwork. In fact, I can't be. First, I live in a condo with no place to work; and secondly, I discovered about 30 years ago, that I'm allergic to sawdust. So, I repurpose good quality, existing enclosures. My Advent cabinets are actually replicas made for me by Kirby Gaal. The madisound web site says 1.5 cubic feet for a sealed box. That's based on a Qts of 0.7. I prefer a little peak in the bass with a slightly higher Q of around 0.8 to 0.85. The Advent cabinets are 1.6 cubic feet, and I wanted heavy fill to kill reflections and standing waves. That would reduce the Q to less than 0.7, so the series resistor was added to raise the Q.
I found that removing the small inductor in a New Advent actually reduces the bass a little too much, and I needed to add the value of the coil's DCR back in to get the bass right. Use of super low DCR coils can be a negative thing, depending on the bass tuning. The JBL L-110 uses an air core coil with a DCR of 0.6 ohms. Going to an iron core coil with lower DCR torpedoed the bass.
As configured, the speakers are optimized for my Rotel RB-1050 & NAD C350, both direct coupled SS amps. With tubes, I'd first take out the series R on the woofer, as the source impedance of a good tube amp is about that value. I'd probably also have to fiddle around with the cap on the tweeter.
Jerry
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Follow Ups
- RE: Advent Evolution - Bold Eagle 10:00:40 06/26/15 (1)
- RE: Advent Evolution - Crazy Dave 13:51:19 06/26/15 (0)
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