|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
192.181.133.141
In Reply to: RE: Whither LOMM? posted by MWE on July 25, 2020 at 20:51:44
It still has quite a bit of coil inductance compared to a LOMC cartridge. Most LOMC cartridges have less than 50-microhenry inductance. The XLZ-7500s has 1.5-mH inductance. This equates to 1500-microhenry inductance. Nevertheless, it's definitely much better than HOMM cartridges, which have coil inductance in the neighborhood of 500-mH.
Best regards,
John Elison
Follow Ups:
The inductance is about as low as they could reasonably go for the output which is 0.06mV/cm/s. The actual voltage output of course depends on the magnet slug size, but the output of my samples was typically <0.3mV ref 0dB (5cm/s rms).
The recommended load is about an order of magnitude less than required for ideal frequency extension at HF - loading at 1k or higher opens up the top end and easily extends to at least 45kHz for the more modestly spec'd models sporting nude elliptical tips (0.2x0.7mil) such as the 785LZE and XLZ3500E.
If you load at the recommended 100 ohms, the cartridge is very much on the warm side with an early roll off above 16kHz.
Regards Anthony
"Beauty is Truth, Truth Beauty.." Keats
Well, I prefer cartridges with lower coil inductance. For example, the Audio Technica AT-ART9 has only 25-microhenry coil inductance with an output voltage of 0.1-mV/cm/s. In other words, the AT-ART9 has 60-times lower inductance than the XLZ-7500s with nearly twice the output voltage.
However, I'm not really concerned about output voltage because I have a phono stage that can handle cartridges with rated outputs as low as 50-microvolts. My favorite cartridge to date is the Audio Technica AT-ART7 with only 8-microhenry coil inductance and a rated output of 0.12-mV.
If I had the money, I'd buy the Audio Technica AT-ART1000, which has only 1-microhenry coil inductance with a rated output of 0.2-mV. Unfortunately, it costs $5000 and I'm not willing to spend that kind of money for a phono cartridge.
Nevertheless, I've found that cartridges with lower coil inductance sound better than cartridges with higher coil inductance. A friend of mine owns the AT-ART1000 and he sent me hi-rez digital recordings made from that cartridge. They are the best sounding vinyl recordings I've ever heard.
To each his own!
Best regards,
John Elison
"Well, I prefer cartridges with lower coil inductance. "
What is your theory on why that is?
"If I had the money, I'd buy the Audio Technica AT-ART1000, which has only 1-microhenry coil inductance with a rated output of 0.2-mV. "
What problem do you think exists with conventional designs that the ART1000 solves?
Regards Anthony
"Beauty is Truth, Truth Beauty.." Keats
What you need to do is trust your ears. Then you don't need to worry about theories and design problems. I've been playing records since I was 12-years old, maybe younger. All I know for sure is that the cartridges that gave me the most pleasure over the years were all ultra low-output moving coils with very low coil inductance. Based on your questions, it's obvious to me that you've never owned an ultra low-output moving coil along with a phono stage capable of extracting its best sound. Consequently, until you put together a topnotch vinyl front-end with an ultra low-output moving coil, you'll never get satisfactory answers to your questions about theories and designs.
Of course, I think you already know the answers to your questions because you seem to read everything I write and I've answered these questions in this forum a number of times. All you're looking for is something to argue about and I don't intend to give it to you. If you don't want to put together a topnotch vinyl front-end, that's your business, but please don't look for an argument to justify your mediocre record player.
Good luck,
John Elison
They were simple questions with a simple intent. Given how you constantly wax lyrical about the ART1000, I had assumed you would have analysed the design more critically from an engineering perspective rather than just basing it on an opinion which you have indeed repeated many times. The cartridge may well sound good and may be the best you have heard, but that doesn't mean that it is more faithfully reproducing the groove as you well know, nor does it mean that the design is superior to a more conventional one.
" it's obvious to me that you've never owned an ultra low-output moving coil along with a phono stage capable of extracting its best sound."
LOL! How do you come up with this material?!
It is incredibly ironic to me and I am sure to anyone that has bothered to read the exchange who has ever been "mauled" by you, when you accuse me of trying to pick an argument when your response is your "trademark" abusive ad hominem attack which you have inflicted on countless of other members on the forum.
" please don't look for an argument to justify your mediocre record player."
The joke is on you, because you are on record as saying that you would be perfectly happy to live with your SL1200!
Regards Anthony
"Beauty is Truth, Truth Beauty.." Keats
is the fact that the coils are mounted directly above the stylus. It would seem to somewhat mimic a cantilever-less design. I don't know how much extra tip mass that would contribute, but presumably not enough to offset its advantages.
Mark in NC
"The thought that life could be better is woven indelibly into our hearts and our brains" -Paul Simon
Well, the recordings I heard sure sounded good. And, my friend who owns it thinks its the best sounding cartridge he's ever heard. He had the AT-ART7 before buying the AT-ART1000.
Yes, the coils attached to the stylus certainly increase effective tip mass, but presumably not enough to offset the advantages. It's a rather unique design, although there have been other similar cartridges.
Best regards,
John Elison
Right, I get that they are not QUITE on the same level as an LOMC, but as you pointed out, they are RELATIVELY close, especially in the area of internal impedance. I'm still surprised that there aren't more of these out there in the market, given their good mix of attributes.
Mark in NC
"The thought that life could be better is woven indelibly into our hearts and our brains" -Paul Simon
A few years back I purchased a NIB Stanton 981LZS, which is your Pickering's sibling. It is close to my Lyra Etna, equals or betters various mid-line and high-end MCs I've had from Lyra, Accuphase, Audioquest, Audio Technica, Denon, and is probably the best of the bunch of many vintage MM and MI I've tried from Acutex, Grace, Azden, Precept, Audio Technica, and others. Hang onto it and figure out a way to get it retipped!
what they cost when they were new, relative to what high-end carts cost now. I can identify with your positive comparisons to the Lyra and others, comparisons which might seem surprising to many.
I was fortunate to have, a few years back, bought the last three OEM Pickering D4000SII
replacement stylus assemblies that a Dutch phono vendor had in stock (no other new OEM Stereohedron units could be found for an affordable price) . They're not the exact proper replacement, but they sound very good, much better than several aftermarket choices I've tried, both cheap and more expensive ones. There are really no better options other than, as you mentioned, retipping. I originally bought the cartridge as just the body, so never had the original stylus assembly anyway.
Mark in NC
"The thought that life could be better is woven indelibly into our hearts and our brains" -Paul Simon
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: