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In Reply to: RE: I wonder how these sound.... posted by sanman on April 21, 2014 at 18:38:39
I don't find that *width* is as much an issue with single Advents than *height* in a normal room. That is when you're accustomed to floor to ceiling line arrays that impart a natural image size to these ears.The end result would still have you listening down to them. I have, however, run my doubles end-to-end atop an elevated brick wall for a neighbor's party to cover a tennis court.
Edits: 04/21/14Follow Ups:
Exactly. And after having had both Dahlquist DQ-10s and Quad ESL-57s, I concluded that I couldn't put up with always having a balcony seat.
I enjoyed both the Dahlquist and Quad much more when I got stands to get them up to ear level. I'm assuming I'd feel the same way about those double Advents. I'd either stack them vertically, or have the stands extended.
Apparently they sounded "kinda dull" to my friend, even through quality gear, also for sale, which my friend bought (ST 70 and PAS 3x)In my cave/workshop, I am happiest with the tweeters up at about 4&1/2 feet in height , since I am standing and moving around a lot in the room when not critical listening. I have tall chairs for that.
I would love a pair of those beauties to play with, though!!
"When the demon is at your door, in the mornin' it won't be there no more"
Steely Dan
Edits: 04/22/14
I know from experience that horizontal stacking with the woofers together is a no-no. Mutual coupling extends well up into the midrange. Waaaay too much bass! Add to that the use of the ST70 and it's a horrible system. The ST70 is a poor match for Advents.
Vertical stacking puts the woofers well apart so mutual coupling begins at fairly low frequencies. Also, with one woofer high and one low in vertical stacking, they each excite room modes differently and the bass is smoother.
Advent tweeters are offset to the left. So when stacked vertically, one pair has the upper tweeter inboard (toward the center of the stacks) and the other stack has the upper tweeter outboard. That does affect symmetry and imaging. I moved one tweeter in each of my two pair to the right of center to make mirror image pairs. Now, when stacked, the two stacks are mirror imaged and overall imaging is better. use the two left of center tweeters in one stack and the two right of center in the other and make the upper tweeters the inboard ones.
Jerry
Their dullness may be caused by a couple of things: 1) the caps in the crossovers are in need of changing which is very likely or, 2) the switches in the back were set to decrease or normal and not extended.
The crossover switching was a bit misleading. In the extended position, the frequency response was at its flattest. Henry had rolloffs aqssociated with the other 2 as at the time he felt records with their his and fm stereo with its limited frequency response as well as cassettes' response did better when the high end was rolled off to reduce the record and tape hiss or draw attention to the midrange and bass where most musical content actually exists.
Because of the distance between the tweeters of the double Advents stacked vertically I never liked the result. Staging was never a strongpoint and doubling them seemed to exacberate the issue. Stacking horizontally moves them further apart I seem to remember and why this was not the recommended way as it would make it an even worse issue. Nothing like a violin or flute spreading across the whole wall.
Don Brian Levy, J.D.
Toronto ON Canada
Hi Brian Anytime you stack speakers like that, you would expect comb filtering. That, combined with room reflection could give some bazar effects.
Dave
If that is what he was driving them with, I am not surprised. I think very highly of both the Stereo 70/PAS 3x and Advents, but they are one of the worst matches I can think of!
Dave
Do the advents require more power?
I have never heard a pair.
"When the demon is at your door, in the mornin' it won't be there no more"
Steely Dan
The impedance is way too low for a tube amp. Solid state with lots of current is the way to go.
Dave
When my stats were off for repair (following disastrous trucking company damage), I hooked the doubles up to 450 watt VTL tube monoblocks. While they had plenty of power, the sound was muffled and dark - which is nothing at all how they sound with the Sound Lab stats. Advents need lower output impedance (high damping factor) to really sing. You need a SS amp.
As for power, one advantage of running doubles is with SS amps that double down power with lower impedance (assuming they're happy with 3 ohms), you effectively get ~6db more output. Or conversely, require one fourth the power for a given level. I was able to drive mine with a Threshold Stasis at a decent level running 4 watts while still running class A.
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