Not Loads
Comparing my own NC400 with dual power supply to my Sure 32511 and 32512 I would have to say no huge differences. The Hypex is very controlled and doesn't have any basic flaws but I've been listening to the 32511 for a few days now and it is very very good. I will be able to expand on that by the middle of next week.
Comparing my own NC400 with dual power supply to my Sure 32511 and 32512 I would have to say no huge differences. The Hypex is very controlled and doesn't have any basic flaws but I've been listening to the 32511 for a few days now and it is very very good. I will be able to expand on that by the middle of next week.
Hmm, I wonder what is sound difference by listener, Pre filter feedback (not so good impulse response, filter not in the control) and post filter (UCD type) feedback.
Ncore is post filter feedback but very low THD. Maybe having the most simple UCD post filter feedback (THD about 0,2 %) sounds best due to good impulse response (phase, delay, etc)..
Some people here claims UCD400 exhausts people, is this because too LOW THD? Maybe sone distortion is needed for listening hmm
Why would too much feedback make amp sound "dead". what is definition of "dead" sound? Do you refer to too bad impulse response due to feedback (and bad delay of high frequecy signals) .. All in all high feedback amp has bad impulse response (non repetitive signal have infinite spectrum theoretically) So impulse resposne to be good you need filter inside loop, and loop gain should be relatively low (and THD not that low)
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Hi
Mine purpose was no feedback like the hybrid, and these also have not that low impedance, but sound wel.
I can include a postfeedback as well, most is the setup of lead lag, because the poles of low pass need to corrected, most with post feedback the higher frequencys are not so low HD, the open loop get less there, so I am busy now with 5 level who has low distortion of his own.
Do not forget, I use air coils, and these are lineair with ceramic and oil filled or mkt caps, I think a amp with very low hd needs a very high open loop, maiking it lineair before feedback as possible is the way to go for good sound. All these error corrections do notmake a good sounding amp persé.
The triangle I go now make with a adder and some digital stuff like d flipflop.
regards
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Dead sound I mean with it is tamed, to much tamed, things like air and deepness but also resolution is less in feedbacked amps, I admit, I do talk about lineair amplifiers where current feedback do a lot better, it's lack of IM and independence of bandwidth is inherent of this type of feedback, however dc drift is more a problem.
Class d are switching, and only the postfeedback can be seen as a real feedback who touch audio.
Mine hybrid who plays here has a tremendous deepness and resolution, I have test it with feedback with a high end listener present, it was clearly less beautifull sound, like driving a car with your feed on the break, that is feedback. I do not talk about the all plate amp.
But in class d I do take it in considering as test.
regards
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Thanks. I've had the TI 3251 in the chain for a week or so. Today I'll switch it out for the Sure 2x400. I'm looking to buy a few more of these modules for a 4 way active build in the near future.
Feedback always appreciated.
Further Listening
The NC400 just has no faults. It is completely revealing of everything in the chain before them.
The sure 32512 is sounding very nice. It has especially strong bass. It is also quite pleasant, no fatigue.
Unfortunately the 32511 has developed a 60hz hum. It was perfect when first run so i don't think it is anything in my work but... The hum showed up after about a week. Fairly low level so I an still very impressed with the overall sound but will need to track the hum down.
The NC400 just has no faults. It is completely revealing of everything in the chain before them.
The sure 32512 is sounding very nice. It has especially strong bass. It is also quite pleasant, no fatigue.
Unfortunately the 32511 has developed a 60hz hum. It was perfect when first run so i don't think it is anything in my work but... The hum showed up after about a week. Fairly low level so I an still very impressed with the overall sound but will need to track the hum down.
You need to sync them, or the supply is cause, like the old fashion motorboat problems, who is because of earth problems, bad connected amps, earth loops...
No, when the slew rate is high enough. It is simple to get high slew rate in linear amplifier with global negative feedback.
Did you listen to NC500 based amps, and with which input boards? (stock ones, custom buffer ones?). Or NC1200 based ones like the Mola Mola Kaluga monos?
Roberto
Just like an old outboard motorboating along the lake. Only does it once in a while. Ba Ba Ba Ba Ba Ba ba ba ba. Say it fast.
I'm sorry to have to post this but I think buyers should be aware of my experience in the last couple of weeks with Connex, I have sent them emails regarding info of the aux pin-outs on both amp and smps and they just don't reply or they say that my emails go to their spam, their products are good but if you have any problems you are on your own.
I have my "Tutu" back from a friend I sold them to a year or so ago. He bought 5 of my power amps and one of my preamps. He wasn't using Tutu and I need something with low end grunt to drive 12" woofers and Altec 511B horns with Italian Faital pro compression drivers.
Tutu monoblocks use the hifimediy Tripath T3 150W Class D modules. They are very cut down with no speaker protection. I use linear 300W supplies with 2 X 22,000uf Mundorf M-Lytic caps. They sound superb with no upper treble brightness what I have come to expect from Tripath modules. The horns Xover from 1100hZ and the Class D amps actually make them Sound smoother by beefing up the lower end.
I would recommend the T3 modules and they are rediculiously cheap. I powered some Quad 63s with them and played them loud. But the quads short cct. protection kicked in and blew up both modules. Hifimediy replaced both modules free of charge. Great service.
Tutu monoblocks use the hifimediy Tripath T3 150W Class D modules. They are very cut down with no speaker protection. I use linear 300W supplies with 2 X 22,000uf Mundorf M-Lytic caps. They sound superb with no upper treble brightness what I have come to expect from Tripath modules. The horns Xover from 1100hZ and the Class D amps actually make them Sound smoother by beefing up the lower end.
I would recommend the T3 modules and they are rediculiously cheap. I powered some Quad 63s with them and played them loud. But the quads short cct. protection kicked in and blew up both modules. Hifimediy replaced both modules free of charge. Great service.
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if the circlotron is ready then I go try a class d design, I have a simple one who do work nicely and is self oscillating, but can also work with a triangle, the first approach has lower HD, and then the quenstion how it sounds, I do not yet now. Seen the transition to these new class D amps, I need to deep myself in it.
regards
regards
