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In Reply to: RE: High powered amp + high Effeciency speakers =? posted by audiophilewannabe on February 23, 2017 at 05:10:44
40 years ago Yamaha used the NDCR (noise distortion clearance range)to measure it's receivers at low volume settings.
Yamaha CR-1020, NDCR (IHF-A) : for 0,1% into 8Ohm 20Hz to 20Khz from 100mW to 70W (Vol -20dB, Phono to SP Out)
Edits: 02/27/17Follow Ups:
So we need "good" at 10 to 25 mW or so :-)
... and NOT that I have anything against 1970s Yamaha, as you may know.
I've been something of a fan -- since 1976 -- and owner since 1978.
I still think the stuff sounds good -- but not something I'd use for the Duplexes.
all the best,
If that's an old Yamaha CA-800 or CA-1000, the class A amplifier mode should get you close :-)
The CA-800 does indeed sound pretty good in Class A; haven't tried it on the Duplexes, though.
The CA-2010 is reputed to work, but is utterly original & I've never had the chutzpah to plug it in! I've had it for years, too.
It DO look nice as a shelf queen, though, don't it? :-)
Just fyi, if that really is a reel of Ampex 407 on the Otari, it's going to need baking before playing, unless it's a reformulated newer vintage.
A gift from a kind denizen @ AK some time back.
Someone chided me for mixing reels on my A77. I can't now remember if my gaff was that I mixed NAB and standard hubs, or metal or plastic reels, but I am willing to believe what I was told.
So, I can't quite say I understand the physics well enough, but I'll admit to being far from a reel to reel tape pro, so I needed a metal, NAB hub take up reel or two. It's perfect for that duty, you know? :-)
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