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georgehifi

Responses from georgehifi

Autoformer vs Speaker impedance Curve
73max OP Don’t listen to those that have anything to gain with their own product by promoting Autoformers, as they are biased and blinded because of it. Just do the experiment for yourself, you have a great amp already (the Classe), borrow beg or ... 
Autoformer vs Speaker impedance Curve
Any thoughts on how old is “too old” for higher end SS amps? Still have my eye on the Classé Omega Monos but it’s at least 15 years old Will be fine if only used a few hours a week. Unless he was a nutter who left them on all day many times a week... 
Autoformer vs Speaker impedance Curve
Any of the amps that you recommend run 20 to 30 db of feedback! Bubble still up, your having illusions, or didn’t do your homework.Two of the amps are "local" and not sound destroying "global" feedback, and are designed to be low output impedance... 
Do these pioneers look genuine?
Watch out for that banana peel, or clean up aisle four.https://insidethemindofanaspie.files.wordpress.com/2013/09/cleaunup-in-aisle-4.jpgCheers George 
narrow and wide baffles and imaging
Well you must know something that Arnie Nudell (rip), Paul McGowan and Bill LeGall don’t... Just going by what I personally hear and read about. Good small two ways on open stands always have great image. Audio Phyic's speakers very narrow baff... 
narrow and wide baffles and imaging
Ok so I got my terminology wrong. Yes you can have a big baffle still with no box, as the IRS V has, but the Beta is truly baffle’less, as are the Plasma’s as are most ESL’s. The moment you ad "wings", you make a baffle and it re-enforces the soun... 
narrow and wide baffles and imaging
I could be mistaken, but the IRS-V’s midrange/tweeter panel was also baffle’less, no? Yes line array, but that sure looks like a baffle to me, even though it curves away. http://www.infinity-classics.de/models/IRS-series+Beta+Gamma-Delta-Sigma... 
narrow and wide baffles and imaging
The best imagining Infinity ever, was the IRS Beta’s with midrange, tweeter, and super tweeter baffle’less.http://product-images.highwire.com/12510183/1772-14.jpgBut as far as highs having a 3 dimensional image, nothing touches my 360’ MP-02 Plasm... 
Autoformer vs Speaker impedance Curve
73max OP Just look at amp reviews on Stereophile and in the bench tests you see they test them into 8 4 and some times 2ohms if they can handle it. Doubling the watts from 8 to 4 to 2ohms is good current, but no amp can double exactly without los... 
Autoformer vs Speaker impedance Curve
73max OP14 posts08-27-2018 3:48amAny thoughts on Pass Labs XA-160.8 with 802D3s? While great amps and very nice sounding, it's bit of 6 of one 1/2 dozen of the other for your speakers though, they are Mosfet and when done in complimentary n an... 
Mytek slams Hypex in Stereophile Amp Review
Not exactly how this works, but yes, large phase shifts mean high currents near zero volts. Hard for most amps. Would be nice if we had impedance graphs for the Duntechs. There is a formula for it, on diyAudio somewhere, but as usual it was in my... 
Mytek slams Hypex in Stereophile Amp Review
The Duntech Sovereigns are specified as being 3 to 4.5 ohms. That is well within what should be the Hypex’s comfort zone. Not if there's a -50'-60' degree negative phase shift also at 3ohms, then the amp could be looking at nearer 1ohm. Mytek... 
Anyone using a Class D amp w/ribbon tweeters?
dsycks15 posts08-25-2018 9:18amI ran BelCanto with Magnapan 1.6s for years. It was pure sex. Yes, I can imagine it was, as in my first post about the Raven ribbon tweeter with the Belcanto M600’s, Maggies are also similar "usually" a nice smooth ... 
Mytek slams Hypex in Stereophile Amp Review
addyson815 If your going to copy and paste something from an article, you shouldn’t do just part of it. "Duntechs, with their multiple drivers and complicated crossovers, are a very difficult load" " Hypex [class-D modules] cannot drive it, the... 
Anyone using a Class D amp w/ribbon tweeters?
and I hear no top end sibilance What I’ve heard is either two things in the upper/mid highs from Class-D, either sibilance as mapman mentions or an opaque whiteness. This to me comes from "high power the low order switching noise output filters" ...