2. amps-preamps
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NEEDED!!! Bi Amp Pros out there that can give me some advice

Ive never Bi Amp'd before and I would like to try it out. I want to avoid costly mistakes so any advice would be greatly appreciated.

Aragon 8008 bb would keep for the lows
Pass Labs Aleph 5 Amp looking to buy for the highs
Dunlavy SC 3's
PS Audio Perfect wave DAC no longer using a preamp
HSU ULS 15's sealed in Stereo two of em 
Tice Power block signature.


The 8008 BB is 200 at 8 ohms and the Dunlavys are 5.5 nom. The Aleph is rated at 60 wpc at 8 and 90 at 4. So I guess Id be running around 70 wpc with the PASS at 5.5 non load. Since Im running XLR out I would either have to y split the XLR's outta the PS Audio or use concurrently with RCA's that the PS audio will do. but I know that changes things on output impedance. So Im hoping some of ya guys been down this path and will help me out. Thanks in advance for any feedback
128x128haywood310
bdp24's avatar
bdp24
9,393 posts
 

@clio09, really interesting to hear you are using a quad of 8" woofers with your Quads. Did you go sealed, or ported? If sealed, about a 1 cu.ft. box? I’ll bet it’s the same woofer Roger uses in his Music Reference ESL’s (which I’m dying to hear), ay? Ain’t it great to have Roger posting on AudiogoN of late? I REALLY miss his AudioCircle Forum (which can still be accessed).

By the way, Rythmik Audio and GR Research now offer an 8" model of their OB/Dipole Sub, which is the same as the 12" model but with less output. Great with planar speakers, of course. I have no doubt four 8’s is better than two 12’s, for the well-known reasons. Better to deal with bass modes acoustically than electronically! ---Eric.

clio09
3,341 posts
 
@bdp24 - Yes Eric I have what Roger now calls the Airspring woofer system. They are sealed 1.4 cu.ft. (internal) boxes with 1.4 cu.ft. Very small footprint in comparison to the Audiokinesis Swarm (which are also fantastic) and work quite well. When we exhibited at the Newport show a few years back Roger brought the system (he uses two woofers) and we were able to set up the room rather quickly. No monkeying with room treatments or anything else. Quite a difference from other rooms I have had to set up.

DSP was never an option for me. As Roger says why take an analog signal, convert it to digital and then convert it back to analog. I can understand why some folks like it and I'm not saying it doesn't work, just too many steps. It is good to see Roger posting here. Another voice of reason is just what this site needs to call attention to a lot of misinformation that exists here. Unfortunately his time is limited so he may not post as often as we might like. Fortunately for me I work with him and have good access to his knowledge.
bdp24's avatar
bdp24
9,393 posts
 
Yer a lucky feller clio! I still come to the Bay Area occasionally (my Cupertino High School 50th anniversary get together is next month!), and plan on making it to Roger's place to hear his direct-drive ESL's when I do. Sounds like a "done" system to me!
clio09
3,341 posts
 
Yes the direct drive amps are nice and Roger does use them in his home system. In the shop we just listen to whatever is lying around. I think right now it's a vintage Marantz receiver with some basic small monitors. The digital source is an old Sony ES model. It is actually a very nice set up.

Definitely let us know when you will be in town. You can come over and listen to my set up too. I have direct drive and OTL amps, as well as a couple different ESLs.
bdp24's avatar
bdp24
9,393 posts
 
Great, thanks man. I'll be in touch---Eric.
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