[George W]

Hey guys,

This summer I plan on building North Creek Music Rhythm/revelator speakers and I was considering building an ASKA 55 (with nirvana upgrade) to power them.  The Rhythms are 4ohm speakers and the designer, George Short, recommends using an amp that doubles power into 4 ohms.  Just curious if the ASKAs provide this and if you feel they'd be a good match.  The Rhythms are slightly sensitive at 91dB so I'm hoping that's enough power.  Thanks,

George

[AKSA]

George,

If the impedance of these speakers never drops below 3.5R, then all is well for the Nirvana 55W.  If it does, then I'd suggest the 100W Nirvana.

Either way, 91dB/watt/meter is just fine and the 55W will still go VERY loud.

Cheers,

Hugh

[George W]

Thanks Hugh, I will verify the minimum impedance.

George

[George W]

Hmmm 3.2 Ohm minimum....there goes some more money!!  
Oh well guess I'll just be saving for awhile longer, ultimately we all know I would have wanted 100 watts anyway.  
I assume this will be fine with the 100w Nirvana?
Thanks for the help,

George

[peranders]

George,

If the impedance of these speakers never drops below 3.5R, then all is well for the Nirvana 55W.  If it does, then I'd suggest the 100W Nirvana.

Either way, 91dB/watt/meter is just fine and the 55W will still go VERY loud.

...and the 100 W plays only 3 dB louder......

[AKSA]

George,

I am sorry.  But just to confirm, I have run the 55W with 3.5R speakers and it runs well, but when compared to the 100W amp there are occasional signs of strain;  it just doesn't have the drive.  With a 6R-8R load, it's actually very difficult to tell the difference between the amps;  but as you go lower, the differences start to emerge.  There is no doubt that with sub 4R the 100W is more suited as current delivery is superior.

Cheers,

Hugh

[George W]

Ok, 100watts it is.
Thanks Hugh,

George

[PSP]

Hi Hugh,
I've been considering building the GR-Research Diluceo (the MTM version of their new Criterion speaker).  It is a 4R speaker and dips to 3.4R; efficiency is around 91db.

I wrote to Danny Richie asking about biamping this speaker (it will work, since the Diluceo uses a parallel crossover)... the question to Danny was "what impedances would the tweeter and woofer amps see?"  Answer:  Highs 5-5.5R, dip to 4.5R minimum; Lows will see an average impedance of a little over 4R with a minimum dip of 3.5R at about 200Hz.

So, the question:  if I biamp these with 55w AKSAs, do you think I will be happy?  (Recall that I have 3 55w AKSAs in my house at present, so if I buy a 100w AKSA I'll have to postpone buying the GK-2, an option that is not in the cards.)  

thanks,
Peter