XTRProf
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Post by XTRProf on May 31, 2011 7:12:32 GMT
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Post by Deleted on May 31, 2011 7:32:04 GMT
That's Bullshit !  You can't even get a Class A HA working properly, it would appear, or you wouldn't be making statements like that ! ;D It's not even dual mono either. david2Vk's 100WCh/8 ohms,(and much more into 4 ohms) Class AB would almost certainly eat it for breakfast in the SQ stakes too, as it easily outperforms a big Krell into $50K speakers in that department. |
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XTRProf
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Post by XTRProf on May 31, 2011 7:56:47 GMT
As usual, you will like to argue without respecting other opinions. Go argue with John Curl, the designer of this amp. Surely, he has much much better credentials than even 3 or more Alex combined by designing some of the top highend amps like some of ML, Denneson, Vendetta, Wilson Audio recorder, MFSL recorder and others. Btw, ask david2Vk whether he knows John Curl and respect him as a top audio designer.  Not duo mono, go see the picture and description again. It's PURE MONO. What bullshits are you talking now?  What designs have you come out with other than copying?   You are supposed to be an engineer and now you are talking more like a Zen! Please if you don't like what I post, don't disturb here for me to share with others! Surely, you are having a serious attitude problem as clearly seen here. Btw, my AHA mk 3 will be even better performing than what you can come out with on your side. |
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Post by Deleted on May 31, 2011 8:27:48 GMT
C'mon guys... keep it cheerfull.
I do admit I would have made the dual mono remark myself overlooking the obvious fact you used these amps in bridge mode and own 2 of them, one for each channel.
I am glad you like your new amp Chong.
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Post by Deleted on May 31, 2011 8:29:10 GMT
What I see in your initial photos is a bridgable, dual channel amplifier using a single toroidal amplifier. However, if you were 2 use 2 of them in bridged mode, they would then be in dual mono. Watch out , or I will take a "Blowtorch" to you . ;D John Curl's designs are more noted for the extravagant OTT cases they may be enclosed in. I think we may also be talking about a champion of Jack Bybee's rip off devices that have been closely examined in DIYAudio by experts in the field, and have failed to live up to the BS they are promoted with. Where have I ever made such a claim ? How about posting some photos of your Class A HA , work in progress ? Have you yet tried it with any higher quality headphones than the low cost HD681 and variants ? Make provocative unfounded statements like that, which were also clearly a swipe at me,and I will reply in similar fashion every time !  |
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XTRProf
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Post by XTRProf on May 31, 2011 9:03:21 GMT
To get it clear, it's PURE MONO. Vertical Biamp and not Horizontal Biamp. Vertical Biamp is one channel in one amp used for the tweeter and the other channel of the SAME amp used for Mid/Bass. This amp sums to say a left channel. The same connection will be for the other amp and that will sum to a right channel. So PURE MONO without the switch to bridge as in the picture. With the switch to bridge, will I be saying 250W RMS? It will be closer to 400W RMS.
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XTRProf
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Post by XTRProf on May 31, 2011 9:16:06 GMT
How about posting some photos of your Class A HA , work in progress ? Have you yet tried it with any higher quality headphones than the low cost HD681 and variants ? For what reason I should share here after this ................. Make provocative unfounded statements like that, which were also clearly a swipe at me,and I will reply in similar fashion every time ! Really ridiculous there! Where have I made a swipe at you? I just make a general statement which can be heard by any free minded soul. Don't you agree that there is in general a bigger and better soundstage and grunts (omphs) from a bigger high power amp over a low power one. If you can't even hear such a difference, I suggest you should stop playing Hifi. |
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Post by Deleted on May 31, 2011 9:41:55 GMT
Grunts, yes. Soundstage no .
Seems like I hit a raw nerve with the other questions .
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Post by Deleted on Jun 1, 2011 1:37:54 GMT
Parasound A23 Power Amp review, and reply from designer John Curl.
Review and fb
Nice-looking power amp, with RCA and XLR inputs, under $1,000. The sound is ok, but 'you get what you pay for'. The deepest bass are missing in action. The mid- and upper- bass are very good, but a little bit too much. The midrange and highs are ok, reasonably detailed and smooth, but not the best around. The soundstage is a little bit confused and narrow. Well, I am very demanding, actually, this amp is among the good ones at its price point. I was mostly disappointed because I had a Parasound HCA-1000A before, and I thought that the A23 would be better. It is actual;ly slightly inferior. I was also unhappy about the fact that, in their brochure, Parasound writes that the power supply is made of 4 caps of 12,000 microfarads, and my A23 had, actually, 4 caps of 10,000 microfarads. I would recommend this amp only if you like the look, need a XLR input, and don't want to spend more. Compared to other amps, the Halo A23 is slightly inferior to Adcom GFA-545-II, Parasound HCA-1000A, Bryston 2B-LP, and equivalent to NAD 214.
Posted by john curl (M ) on March 29, 2010 at 09:29:42
In Reply to: REVIEW: Parasound A-23 Amplifier (SS) posted by Belgarchi on March 28, 2010 at 21:05:13:
Thanks for the input. It seems fair to me. The only 'surprise' to me was the comparison to the HCA1000, which should be essentially the same thing. I would rebias the unit, myself, often they starve the outputs, but you get what you pay for, in any case.
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XTRProf
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Post by XTRProf on Jun 1, 2011 2:30:40 GMT
2 PURE MONO at least 250W per channel Class AB (high class A bias) and very much different from just a single amp as said. Biamp too. Ha, ha, you what kind of engineer who can't even analyse technically and now going to Zen and others to support your usual one sided close minded thinking. I thought you are technical instead of Zen? Even JC said the HC-1000A was technically about the same as the A23 and yet the reviewer said it was different. Religion coming in? Go do something better instead of disturbing the peace here. Btw, I hadn't even modified them yet as usual to my usual highend std. |
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Post by Deleted on Jun 1, 2011 3:12:01 GMT
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Post by Deleted on Jun 1, 2011 17:56:56 GMT
Hi all whats all this then? most amplifier designs are based on previous work. it's not copying it's called learning from experience and progress. that parasound looks nice, well built and rugged and I'm glad that you are enjoying it. as for how it sounds, well I've not heard it so can't comment on that. however power does not always equate to quality and the best amp I've heard is a 45se errr 1.5W O/P. as for your super mods for the Class A I'm interested, lets see them and hear your in depth explanation of whats involved. :oi may wan't to try it  maybe someone could help you with that. mods by post styleee.  huuurump all that matters is we like what we have ;D lets not turn this interesting thread into a bun fight lets have some of your thoughts on how this amp sounds take care |
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XTRProf
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Post by XTRProf on Jun 2, 2011 3:58:23 GMT
whats all this then? most amplifier designs are based on previous work. it's not copying it's called learning from experience and progress. Yeah, at least that's an original design started from John Curl himself for the Parasound and modified by him. Not copying other people ideas and claimed to be his. There is a clear distinction for plagiarism when we write thesis to pass out from the uni and that definition still stands. that parasound looks nice, well built and rugged and I'm glad that you are enjoying it. as for how it sounds, well I've not heard it so can't comment on that. however power does not always equate to quality and the best amp I've heard is a 45se errr 1.5W O/P. as for your super mods for the Class A I'm interested, lets see them and hear your in depth explanation of whats involved. :oi may wan't to try it maybe someone could help you with that. mods by post styleee. huuurump all that matters is we like what we have ;D lets have some of your thoughts on how this amp sounds Oh, that had already been reviewed here by someone and Alex prejudgement even before I have the time to put in my comments for the Parasound. Similar to JC statement, I have nothing more to add on from real life encounter with my 2 PURE MONO amps to review here. The 2 PURE MONO blocks and BIAMP version is the same performance as the normal stereo version TECHNICALLY as posted here. Yeah, I have to declare also that a Lambo and a 1000cc car is the same TECHNICALLY and FEEL as well. So save your money for an upgrade as the Mr Bean car is EXACTLY the same as the Lambo. Ask any engineers and they will say I'm wrong and the reviewer and Alex are right. Who am I here, right? Only other reviewers are good enough except me. I'm a nobody in experience and knowledge and other things working in myriad industries for more than 30 years. Even passing out from a local Polytechnic and 2 unis with distinctions from the US and England is not good enough to write here. Full stop! Anyway, who cares now if everything I write is not correct by someone prejudged std ............. Check for yourself who is stalking me. I think I will have better time listening to music and doing up my hifi stuffs to my usual hiend std than writing any more in this thread. I let the world be the final judge here as I firmly believed in justice, freedom and most important of all CONSTRUCTIVE FREE SPEECH. |
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Post by Deleted on Jun 2, 2011 7:58:43 GMT
Hi Chong
i'm sorry you feel that way.
i'd still be interested to hear your thoughts on the SQ of this amp.
take care
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jonclancy
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Post by jonclancy on Jun 2, 2011 18:19:00 GMT
Those amps look very nice. Shame about the bunfight...  I ran my Arcams in the same vertical biamp manner - links to mono the input, but no bridging both channels to increase power output. Same amp topology, and can't recall "dual mono" appearing anywhere in the OP. Nowt wrong with a proud new owner showing off his new toys. I can even forgive a little hyperbole... Oh, and let's hear any tweaks for any of the projects we're working on here - it's good to share...  |
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XTRProf
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Post by XTRProf on Jun 3, 2011 7:56:08 GMT
Hi Chong i'm sorry you feel that way. i'd still be interested to hear your thoughts on the SQ of this amp. take care Ok, I relent since you are a nice guy and still is. But only thru pm. |
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XTRProf
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Post by XTRProf on Jun 3, 2011 7:58:22 GMT
Those amps look very nice. Shame about the bunfight... I ran my Arcams in the same vertical biamp manner - links to mono the input, but no bridging both channels to increase power output. Same amp topology, and can't recall "dual mono" appearing anywhere in the OP. Nowt wrong with a proud new owner showing off his new toys. I can even forgive a little hyperbole... Oh, and let's hear any tweaks for any of the projects we're working on here - it's good to share... Same for you Jon! Only thru pm. |
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What designs have you come out with other than copying? 
You are supposed to be an engineer and now you are talking more like a Zen! 
