|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
67.33.142.151
In Reply to: for $2500, which CDP to get? posted by Gofast on April 15, 2007 at 09:18:12:
It is a really nice CDP and you should try to get a listen.
Follow Ups:
If it's running at 192 kHz, it's not "8x oversampling." 8x oversampling is 352.8 kHz. If the DAC is actually running at 192 kHz, it's asynchronous conversion. Red flag.
nt
With classic "8x oversampling" synchronous conversion (and also 24/96 upsampling via DSD), the output signal is coupled to the input signal via a common clock. If there is jitter at the input, the oversampled signal will have a variant of that jitter as well, but the amplitude of the signal is purely a function of the digital filter algorithm. No additional noise is added.The problem with ASRC is the input and output are run by *independent* clocks. Now at the outset, this may seem desirable, but what happens is the input signal is oversampled at an extremely high rate- The ASRC enables the output to simply grab the sample closest to the output clock trigger. But the problem arises from the input jitter, which is transferred the intermediate oversampled signal, being shifted in time relative to the output clock. The input jitter is de-correlated from the output clock, but shifting the waveform (the jitter error) makes the output see a different **amplitude** than what it would have seen without jitter. This results in the jitter being transformed to noise.
This noise is not only due to input jitter, but in actuality due to the combined jitter of the input signal and output clock. And from listening, I think this high-frequency "haze" riding on the music is the by-product of ASRC. For when I listen to standard conversion, this HF "haze" is conspicuous in its absence.
To me (but not necessarily to everyone), ASRC-based digital playback is *very* fatiguing to listen to. And a lot of the initial sonic bliss people have with these products is soon followed by yet another round of sonic frustration.
How about Rega, are their players ASRC?
nt.
My best answer to that is an episode I once had in Tucson, AZ. I was in a computer lab at Raytheon, doing some legacy testing. Suddenly, out of nowhere, a nearby computer monitor (all were CRTs at the time) started emitting a **loud** HF whistle from the flyback transformer. I just jumped up and bolted out of the lab. A technician in the lab, in seeing me do that, wondered what the problem was.....I haven't heard every unit out there, and there may exist ASRC units that I may actually like. I think there's something wrong with the technology, but I'll never question anybody who likes how such products sound. No two people like the exact same things.
a better reply. Thanks anyway.
I might give it a listen, but I'm skeptical of buying MF equipment anymore, unless its at rock bottom used prices. I'm still looking for a second P180 amp. I have about 15 MF amps and 4 preamps, all TdP designs from the 80s. There is ZERO support. Won't give or sell me a schematic. Won't respond to emails. Phone calls don't get returned. I had to take my MVT preamp to Hong Kong to get a switch replaced, and I've yet to find a toriod that will fit my MA50 amps case. Superb sounding and built stuff, but Michaelson deserves a kick in the pants for abandoning the customers that buy this stuff. Its no wonder that MF gear depreciates like a rock. Its all flavour of the month stuff and disposable stuff with MF I fear.
like a rock is to me unfounded compared to other mfgs. products. In fact the A5 series has gone up in price in recently.
All I can say is to wish you luck. There is more of an MF following now than there has ever been in the US in the past, and thus more of a dealer base.In the past, MF has abandoned their dealers. If they retain their dealers this time around, maybe stuff will be repairable and hold its value.
But, I think they dumped Audio Advisor too in their 2nd attempt at the US. When AA was importing MF stuff, they could not get it repaired easily. One of my friends had a bad experience with an amp (A100?).
If you compare prices of used MF equipement, vs Linn/Naim/Krell etc, of the same vintage, at the same price point, the Naim etc will almost be double or more. The reason for the MF discount is not due to sound quality, but the fact that MF will not support its product, and all the stuff will trade like orphan company products.
Take an MF A1 integrated. Today, 150-250, in spite of a cult following. Original Nait? Probably 400-500. Or a ML or Krell amp: 2000? more? MF A370? 500-750 if you can find one? Which one sounds better? MF in every case. Another friend has an A2 integ which is currently dead. Can MF suggest a repair facility? Nope. Gotta find an independant on your own.
I'm not saying don't buy the A5..it will be a very good product. But don't expect it to hold its value once MF moves to a new model line and stops supporting it (history to date suggests that MF abandoning the product support is inevitable).
I tend to hang onto stuff for long periods of time, once I decide on it. (I buy & sell a lot during the decision making process, however). So, the only time I'll buy MF anymore is when its been fully depreciated. In the meantime, I have a bunch of MF stuff to sell, that will trade for way less than its sound quality would imply.
I have a friends P270. Blown output transistor and the storage caps need to be replaced.
Do you have someone you can recomend to repair it?
Have your friend try and track down the transistor pair. They are an obsolete hitachi. Once in a while someone parts out a 370, and sell the transistors from 1 channel.With the right transistor in hand, I have a guy in NJ that will fix it. But he wont do engineering or mods. Just debug and replace/repair. Since the parts are not avail, he is going to get stuck, so better if you find the transistor first.
Keep my email handy and contact me offline when you find the part, and I'll hook you up.
Here is some info on the fets you need
I changed the 6112 tubes in my A5 to a matched pair of NOS/NIB early 60's Sylvania tubes. Brought the level of performance up another notch.
I thought the A5 tubes were soldered in and not optimized for tube rolling. Wondering how complicated the excursion of changing tubes is as I'd love to try it.
Yes, the tubes are soldered in. Which I could easily have done myself. However, the opportunity arose as one of the stock tubes started becoming a bit noisy. Wound up sending it into MF and had them do it.I wouldn't change your tubes unless you have a noise isssue.
| ||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: