ACOUSTIC ZEN ADAGIOS:
Type Two-way transmission line
Woofer 2 pieces 6½” composed of doped ceramic coated fabric cone, 2 ½” under-hung (short voice coil /long magnetic gap) voice coil linear motor system, shielded 7oz Neodymium magnet.
Tweeter 1 5/8” Round Ribbon, shielded 3.5 oz high flux energy and high temperature resistant magnet structure.
Nominal Impedance 6 ohm
Sensitivity 89 dB / 1w / 1 meter
Crossover 3 kHz / 18 dB / Octave Linkwitz / Riley Crossovers.
Frequency Response 30Hz -25 kHz ± 3dB
Power Handling 50 - 200W
Weight 78 lbs each
Dimensions 48” (H)x 9”(W)x 13”(D)
I want an A/V Receiver and not separates.
Thanks,
Eddie
You are going to need a beefy amp. It says nominal 6 ohms, but I can tell you to achieve a 3db point of 30 Hz with two small drivers the minimal impedance is almost certainly below 4 ohms. This will be especially true if the speakers are diffraction compensated in the crossover, and I bet they are from the favorable reviews. See if the manufacturer will tell you the minimal impedance and at what frequency.
You are going to need amplification that gives something like 75 to 100 watts into 8 ohms and 150 to 200 watts into four ohms or up to twice that if you want. I just see a current hungry set of speakers here, more likely than not.
Take a look at this thread running now.
http://forums.audioholics.com/forums/showthread.php?p=390893#post390893
Now I bet they sound very good. I was not aware of these speakers. TL speakers are rare. They do have a much cleaner, accurate and more powerful bass than anything else. Also please be aware that the bass will roll off at 12 db per octave below the 3db point of 30 Hz. Standard ported enclosures roll off at 24 db per octave. So you will have good bass extension down to the 20 Hz area. They need powering by something with some real guts.
Now one of the problems with TLs is that the bass is so good, sub woofers spoil them unless they are also TL. This has been mentioned many times with the Thor. I recommend you run those TLs full range and use a sub very subtly indeed. Your best solution is to build a TL sub. I'm not aware of a commercial one.
Now the center is a standard fourth order ported alignment. It will be interesting to see how that blends with the TLs. I made my center also a TL.
http://mdcarter.smugmug.com/Walberswick Studios
Now also bear in mind that center will have to be placed vertically and NOT horizontally.
Please give us a full report when you have them set up, and properly powered. By the way, I know you want a receiver, but for the speakers you have selected, I would consider separates strongly. Receivers that will do a good job with those are few. There is a new Yamaha that would, but its pricey. Gene has just finished reviewing it.
