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Old 18th August 2012, 08:09 PM   #6981
dvv is offline dvv  Serbia
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Quote:
Originally Posted by Pano View Post
Compressed at what bitrate? I doubt many of us could tell >200 kbps compressed files from uncompressed in the car.
Frankly, I don't know. Put it this way - while a normal 16-bit Red Book file takes up say 33 MB or so, in WMA format this will shrink to about 5 MB, a compression ratio of say 6.5-7.2:1, or so.

Sounds fairly decent, although on occasion the bass can sound a little bloated. But the 16-bit uncompressed ALWAYS gets it on overall clarity and detail.

Bear in mind that all this is related to the specific system I got from GM as built in standard equipment. When I swap the speakers for JBL units (and rest assured I will), possibly this may also change one way or another. Personally, I think better speakers will only make the difference show up more, not less.

Overall, these are simply idle musings, I never expected the humble all-in-one, everything-but-the-kitchen-sink built in system to rival a good home setup, and besides, while driving, I am hardly in the position of being able to critically evaluate anything, too many dimwitted dodos all around me, plus all the kamikaze drivers and pedestrians.
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Old 18th August 2012, 08:37 PM   #6982
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I wish you folks could have heard WNCN in New York when it was classical. Designed by Dick Sequerra, it was the cleanest FM I have ever heard and as a retired NPR General Manager and world traveler, I have heard quite a few. WFMT in Chicago was pretty good too. The SQ of most NPR stations sucks. Regards
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Old 18th August 2012, 08:56 PM   #6983
bcarso is offline bcarso  United States
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KUSC out here usually does pretty well on SQ. However, the weeknight guy Svejda has a propensity for ignoring the quality of the recordings if he likes the interpretation sufficiently.

The other night I heard a fine recent recording of the Rachmaninoff Corelli variations, and as promised this was followed by the composer's Symphonic Dances. The sound quality was truly execrable, unlistenable. After the first movement saxophone solo I turned it off.
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Old 18th August 2012, 10:07 PM   #6984
SY is offline SY  United States
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Try WMA lossless. Good enough that I can't hear a difference in ABX, and I'm pretty sensitive to data compression artifacts.
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Old 19th August 2012, 09:41 AM   #6985
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Originally Posted by tvrgeek View Post
Happy camper. A second HCA 1200 II arrived today. Woofers now happy again. Wife happy.

Nigel, complain about BBC all you want. Here in Washington DC we have one usable classical station. Old equipment, old recordings. They do try. Good enough for my commute to work as I find my tolerance for the DJ's on even the classic rock stations too much to bare. Decent Jazz on the radio? Not a chance. FIOS ( our fiber cable TV system) does at least have good programming. They refused to tell me what the specs were.
I know it well and listen on his Marantz model 10 when with my friend Ijaz near Washington . I wasn't complaining , I was saying when done correctly it can seem to have 75 % silence . I want that model 10 .

Does anyone have a distortion analysis of a Revox A 77 ( Agfa tape if I am so lucky ) . - 5 dB 0VU and + 5 db would be great . I was talking with my friend Paul Stewart about this . His statement to me is Digital as now offered gives 7 % of what he offers to the recording medium compared with best analog which he still uses . We talked about 16 bit Nicam , I would love to know more . Paul and I are trying to revive 78's especially for the disco's that still use 1210's ( adapted ) . We plan to cut at 33/1/3 and use the same idea as Mobile Fidelity . Many will not know that was Paul's baby as was VHS . Paul and I were two little boys who played in Audio in the 1970's . Paul looked about 16 when doing Mobile Fidelity , I think we were both about 20 ? I am told by Paul that JVC would have been far above Denon if only they had allowed Japan only products out of Japan . Paul told me about being offered a drink by a waitress whilst listening to a JVC CD 4 tape recording ( quadrophonic ) . There was no lady there when he said yes please . He not only heard her he felt her there . This is logical as good phase response and enough power should do that . Michael Gerzon would have understood that . My favourite cinema the Phoenix in Oxford has good sound . It is about 100 yards from where Michael lived and worked ( recording ) . I just wish the Phoenix would switch off the Dolby surround , it is useless . Percy Wilson lived about 50 yards away also ( I never knowingly met him ) . Percy invented many hi fi things . Percy was a man with excellent mathematical ability who seldom used maths in his writings . When he did he was the real deal .

http://www.ee.ic.ac.uk/naylor/LineSo...akers/horn.pdf

Last edited by nigel pearson; 19th August 2012 at 09:55 AM.
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Old 19th August 2012, 09:47 AM   #6986
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Originally Posted by john dozier View Post
I wish you folks could have heard WNCN in New York when it was classical. Designed by Dick Sequerra, it was the cleanest FM I have ever heard and as a retired NPR General Manager and world traveler, I have heard quite a few. WFMT in Chicago was pretty good too. The SQ of most NPR stations sucks. Regards
Dick was involved with Model 10 ( 70 % ? ) .

Just lifted this from another thread . DVV and Mr Wayne should love this .

http://www.elab.ph/forum/index.php?topic=32688.0

Last edited by nigel pearson; 19th August 2012 at 10:01 AM.
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Old 19th August 2012, 06:15 PM   #6987
dvv is offline dvv  Serbia
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Thanks for the link, Nigel, but it's too lenghthy to follow up, and besides, I do not insist tham my amp be able to work steady state into 1 Ohm, just that it is capable of riding out peaks into 1 Ohm. My steady state requirements stop at 1.8 Ohms, when my protection circuit activates and starts to steal current from the driver circuits.

I never learnt how far is Wayne prepared to go with his doubling down, you have to ask him that. Perhaps 0.5 Ohms, that should be good enough for a welding machine? :-))))))
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Old 19th August 2012, 07:30 PM   #6988
tvrgeek is offline tvrgeek  United States
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JVC slipped and let one gem out. It was a little portable cassette deck. Not up to a Uher, but could put a lot of other stuff to shame.
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Old 19th August 2012, 09:44 PM   #6989
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Originally Posted by dvv View Post
Thanks for the link, Nigel, but it's too lenghthy to follow up, and besides, I do not insist tham my amp be able to work steady state into 1 Ohm, just that it is capable of riding out peaks into 1 Ohm. My steady state requirements stop at 1.8 Ohms, when my protection circuit activates and starts to steal current from the driver circuits.

I never learnt how far is Wayne prepared to go with his doubling down, you have to ask him that. Perhaps 0.5 Ohms, that should be good enough for a welding machine? :-))))))

It was 500 W 1 ohms , that's all . Has someone predicted our threads ? It has become our bench mark ?
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Old 19th August 2012, 10:12 PM   #6990
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I have been ranting on about Nicam here and other places . Hope some would like to read more .

The BBC PCM / NICAM Story
Digital Systems
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