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It's too bad that you had so much trouble with the A23. I have an A21 which is a different animal from the A23. It has been reliable for the 5 years that I have had it. It is very dynamic, detailed with excellent bass and slam. It drove my Magnepan 1.6's effortlessly. I have since replaced it with a Pass Labs X250. The Pass is a much better amp at 3 times the cost but the A21 had much better attack and a crisper sound compared to the X250. The A21 needs careful preamp matching IMHO. The build quality on the A21 is fantastic. By the way, the A21 weighs 60 pounds and the A23 weighs 28 pounds.
Hi,would you mind to discribe how the pass lab is better?Thanks.
OK glad we cleared that up! Went to double check as I recall that series had A/AB designation at one point but I was just on Pass's site and they list it as just AB. My bad.I am mostly familiar with their "pure" class A amps which are as you know very popular with recording engineers.Do you use set up disciplines as I mentioned those are critical to assuring you "get what you paid for." ???Just curious. It amazed me that my buddy with the Maggies had never done ANY setup at all and just placed them "where they look good." He thought they sounded magnificent until I spent an afternoon getting them to "lock up with the room acoustics" by moving them a quarter inch at a time. Then BINGO---his jaw dropped. OMG.
I believe class A/AB is the same thing as class AB. I think the class A/AB designation is used by Pass to help us, less technically knowledgable, understand exactly what Pass amps are doing / understand the transition from pure class A to class AB. Pretty sure even the X250, though designated as class AB is actually pure class A for a certain number of watts.
I believe class A/AB is the same thing as class AB. I think the class A/AB designation is used by Pass to help us, less technically knowledgable, understand exactly what Pass amps are doing / understand the transition from pure class A to class AB.
Unless corrected by Nelson himself (or someone of similar authority) it is NOT the same. AB amps do NOT transition first starting out in class A. There IS no class A in an AB amp.A/AB class HAS the transition. Which is what confusicated me about Nelson's new amp listings. In the older Pass amps I am familiar with he had an active A/AB designation. Now it appears he has completely split his amps into A class and AB class.I could not find on his site any mention of the first few watts on the newest version of the amp in consideration. The new ones MAY be A/AB but they do NOT say so on his site. The older model Pass amps WERE A/AB.It makes a difference. Class A is more "true" to the input signal with no notch distortion to cloud the sound. It will run hot if it has much wattage while running in class A AND it is pretty rough on the amp unless it is built for it.
I would hazard a guess that Nelson Pass is trying to differentiate between his different series of amps by drawing a line in the sand: "THIS is a CLASS A amp---the OTHER is a CLASS A/B amp. That is why the Pass class A amp is a lot more MONEY."--------------------end quote---------------------------------Sorry for the messed up quote / message. IPad isn't so great for this site.Well that's the thing. The prices of the X and XA series are comparable up until you start getting into the XA monoblocks and the amount of class A power increases into what is normal/easy AB power amp territory. I'm still almost 100% positive all Pass amps are "hybrid" A/AB despite the line in the sand in the marketing department ; Again, hence the reason for the bias meter on the fronts of all the amps regardless of series.
But then again so are my Harbeths with two 12 inch sealed subs and two 15 inch velodynes crossed UNDER at 40. These image "in the next room." You can literally walk around the room and "look" into the stage setup and "See" exactly where the musicians are standing---in THREE DEE (3D) stereoscopic display like a holograph. As you move around the performers they stay put and you can "view" them from all different angles. It sounds like there is a stage there and you can actually see the image "from the side" which is pretty unreal. Or very "real."
That's awesome. The first and only time I've heard this same thing was at a high end dealer back in the early 2000's. They had Wilson Watt Puppy 6's, Classe Omega monoblocks, and all Meridian front end gear. They played some piano music for me. It was as if the piano was in the room. I could walk around it and the sound still seemed to come from same exact place. It was so physical it was spooky. Invisible piano. I haven't visited another high-end dealer or demoed/experienced anything like that anywhere since. Caveat, I rarely get a chance to visit audio dealers anymore and I've never been to an audio show.
I have always wanted to hear Harbeths. I have not seen a bad review. I like traditional speakers too. I really like PSB Synchrony's and Theils. I have a pair of Monitor Audio S1's and PSB B6's to go along with my Magnepan 1.6's and MMG's.
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