georgehifi
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Posts posted by georgehifi
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Point taken.
I would like to listen to one in my system one day if that's possible.
The importer has a Hi Fi shop in Bondi Junction you'll have to do some searching to find the contact details, I'm sure he lends it out with credit card details left.
Cheers George
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We had two very good turntables with high end MC and MM cartriges, and we had a Cymer tubed pre that we use and my Lightspeed Attenuator. No matter what combination the Tom Evans phono stage came out on top, and not by a little margine.
Cheers George
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Are you in Melbourne, George?
If so, you might like to try it out against a 5th? But to do a fair comparison, we have to have the same loading on each - so what loads does the TE Micro Groove accommodate?Regards,
Andy
I don't have one of the Tom Evens Micro Grooves myself it was lent to us by the importer for a phono stage shootout at the Ason (Sydney) audio society one month, the others were the top Dynavector phono, EAR's highly regarded one, and the one Allen Wright and Joe Rassmussen do for around $1800, and another tube one I forget.
Cheers George
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Only the older ME M/C phono stage, it was good in the same class as the other 4 in the shoot out, but sorry Steiny not in the same league as the Tom Evans it was special, it had a grandure none of the other could match, but was still tight and dynamic from top to bottom, and it had body, hell even the cymbals had body.
Cheers George
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I have listened to Tom Evans Micro Groove phono stage A/B against 4 other very good ones and it thrashed I mean thrashed the others, so if this is any indication of how his power amps are they will be very good.
Cheers George
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Then there's this a TVC (transformer volume control) now this will really do everyones head in, as they are transformer based passive attenuators, no active components. Yet if they are wound to give gain what do we call these? as they are still passive.
Cheers George
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Passive means no active components in the signal path, and should be called passive attenuators.
If they have unity gain active stage then these should be called unity gain preamps, but this is a bit of a grey area as preamps mean they preamplify and have a gain stage.
Cheers George
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Why is it called a "passive pre-amp" if it introduces its own amplification? What is passive about it? I thought that a passive pre-amp merely attenuated a fixed signal from a line source. Otherwise, isn't it an "active" pre-amp?
That's what I'm getting at, they should not be called passive preamps as they do not preamplify the signal, they should be called passive attenuators.
Cheers George
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you have a passive pre-amp within your CD player or other source.
Sorry to have to correct you here, but the volume control within his Sony XA7-ES is just a passive attenuator (cheap pot) on the output, not a passive preamp, as to say passive preamp means it has some sort of preamplification going on,(hence the word preamplify) and that has to be active with gain after the passive pot. His fixed output of the Sony would sound better but you need some way to control the volume (a better passive attenuator) rather than the cheap pot Sony uses.
Cheers George
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From what I've seen inside, some of the intergrated Copland models, they are just a poweramp with a passive attenuator and input selector on the input anyway, just all in one box, so your in luck. You have already whats being disscussed here, and yes the Coplands do sound nice.
Cheers George
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Yep my favorite motto is,
"The Best Preamp is no Preamp"
As most sources these days have so much gain they can send nearly all amps into clipping without the need to preamplify as well. You just need a way to control the volume. This is why passive attenuators are making such a big comeback, you just have to have low source (cdp or phono stage) output impedance <200ohms or less which most are.
And poweramps of >47K or more input impedance, which most are.
Then you can have that sound of transparency/dynamics and zero colouration of no preamp in the signal path.
Cheers George
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If your belt is just a bit stretched, there is a fix I use that works well if you can't find find a new one.
I put the old one in boiling water for about 10mins then dunk it into ice water this shrinks them back down to be usable again.
Cheers George
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These are the best ones.
http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=170405198099&ssPageName=STRK:MEWAX:IT
Cheers George
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I think the older intergrated Audiolab topology is a bit like the older Musical Fidelity intergrateds, the power amp sections have less gain stages than normal poweramps as from what I've seen inside on some of these when I've had them for repair they use high gain preamp sections where it's cheaper using sometimes opamp after opamp.
Cheers George
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Audiolab 8000A intergrated 60w rms per ch nice British amp musical and dynamic
$400 and you get a CDP thrown in.
Cheers George
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For those who are interested in finding out the output impedance of a cathode follower output stage and can read what the cathode resistor is in their setup here is a handy calculator that can tell you what you have.
http://www.pentodepress.com/home/amplifier-calculators/cathode-follower/
Cheers George
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Well if the source is 5kohm output impedance as Tuyen has found out and the input the the LFD is 8.2kohm as stated here and posted by ozmillsy http://home.scarlet.be/~tsc64115/pro.../lfd02_en.html
then you have a bad impedance mismatch and can only be hepled by 3 ways in order of the simplest to do first
1 insert a buffer like the Burson directy after the source. or
2 by raising the input impedance of the amp by a tech from 8.2k to around 100kohm
3 by somehow getting the source down below 100ohms
Cheers George
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Yeah, especially since he menstruates.
God help us when menopause sets in.
Cheers George
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George i purchased this from you not too long ago. I have been using this in my main rig with a noticeable difference but works equally well with a headphone setup.
He breathes a sigh of relief, sorry you threw me when you included the word "Fiber" I thought some one was cashing in on my Lightspeed Attenuator name again. Good to see it's going well for you.
Cheers George
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Click the link in Georgehifi's signature.
How did we get onto this website ragging anyway, it's got nothing to do with hifi sound.
It's a free Optus website for subscribers, and that's all I need to keep pricing down as I have orders comming out of my yingyang, doesn't make my product sound better or worse, no voodoo intended here.
Cheers George
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Lightspeed Fibre Attenuator??
OK you have my attention? what where who how?????
Cheers George
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what about a creek evolution at $600............?
Try Zaphod Beeblebrox he should have a good s/h ME that will out gun the Creek for the same sort of money.
Cheers George
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[quote=johnnydarko;389216
Who needs to "brush up on Ohms law"? .
People who belive there's some sort of magic voodoo going on, and argue the fact, and have know knowledge of why?
5Kohms dictates that it could be just a simple cathode follower tube output maybe with a volume control before it after the I/V stage or it is a 5kohm passive volume control after the tube stage. It's all relative to basic Ohms Law principle that most of us learnt in high school.
Cheers George
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5Kohm, Well there you go thanks Tuyen. As it is the height of stupidity to have a dac with an output impedance of 50kohms, Some people need brush up on Ohms Law.
Cheers George
Tom Evans Linear A (also Stereo Knight M-100)
in Stereo Amplifiers & Pre-Amps
Posted
Just found them here http://www.hifijunction.com.au/
Cheers George