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While I am certain the Imperia is a sound to behold, I get the impression that the target price is equal to the price of a modest home in the midwest. The midbass horn particularly intrigues me. Actually I had the thought to make something similar after I first saw the 300hz horn. In fact I bought a set of router bits intended to ease such construction. See here:http://www.mlcswoodworking.com/shopsite_sc/store/html/smarthtml/pages/bt_door.html#multisided_glue_anchorHow to guide here:http://www.mlcswoodworking.com/shopsite_sc/store/html/smarthtml/graphics2/plans-12-sided-planter.pdfNeed to work out a little geometry, but nothing difficult.I have in mind to try this cone driver given JLH's experience with it.http://www.usspeaker.com/faital%20pro%20m5n12-80-1.htmThis one could work too:http://www.usspeaker.com/B&C-8PE21-1.htmHere is a good discussion on phase plugs, if it is needed.http://www.centauriaudio.com.au/diy/plugs.html
They are a pair of the Consonance Cyber 845's and I don't they have any feedback. I have not traced the circuit yet, so I can't be 100% certain. I do plan on trying a Zobel to try and smooth out the impedance bumps and make life a little easier for the amp. Assuming I can find time this weekend I plan on measuring the amps, including the output impedance. I need to calculate the values for a Zobel as well along with what seems to be a ton of other things. Quote from: nullspace on 14 Oct 2009, 03:16 pmQuote from: mgalusha on 14 Oct 2009, 03:14 amII picked up an 845 based SET a couple of weeks ago and I'm starting to see the attraction. Mike, Could you tell us a bit more about your 845 SET? The reson I ask is because, since it's SET I assume no-feedback and therefore a 2-3ohm output impedence, based on the Abbey's impedence plot you posted the freq. response should differ from the official plot Dr. Geddes has posted at his website. And I would like to hear your impressions on how the speakers sound with the SET.I'm mightily curious about the Abbeys, but were I to snag a pair I'd almost certainly try putting a LCR across the speaker to smooth about the impedence bump at 1.5khz.
Quote from: mgalusha on 14 Oct 2009, 03:14 amII picked up an 845 based SET a couple of weeks ago and I'm starting to see the attraction. Mike, Could you tell us a bit more about your 845 SET? The reson I ask is because, since it's SET I assume no-feedback and therefore a 2-3ohm output impedence, based on the Abbey's impedence plot you posted the freq. response should differ from the official plot Dr. Geddes has posted at his website. And I would like to hear your impressions on how the speakers sound with the SET.I'm mightily curious about the Abbeys, but were I to snag a pair I'd almost certainly try putting a LCR across the speaker to smooth about the impedence bump at 1.5khz.
II picked up an 845 based SET a couple of weeks ago and I'm starting to see the attraction.
An unbiased review on one horn system of a well known personality within the audiophile community. http://www.enjoythemusic.com/magazine/viewpoint/0310/audiolics_anonymous_chapter_125.htm
Did you ever get around to trying any impedence compensation with the Abbeys? I've been on a kick lately, thinking about how relatively important smooth impedence and benign phase angles are for SETs, and I'd appreciate your comments. Thanks.
I saw that the other day and immediately recognized Romy's system. I always wondered if what he writes about was as good as he makes it sound, it appears so. I have spent a fair amount of time reading about his "Melquiades" amplifier. I might have to collect up the parts to build a couple though that is only part of the picture.
I hate the complexity of active systems but they just do so many things right.
The Ashly processor looks nice, how do you like it? I still have one of my hot rodded DCX's from my previous active setup so I'd start with that.
Am I the only one who uses a dbx Drive Rack PA? I like it just fine but I have to wonder why I never see it mentioned on AC.