OT: Dual bi-valve for uncompressed sound

Coursedesign wrote on 11/26/2009, 12:18 PM
This is for Grazie:

The latest combined with the greatest

This company in the U.K. developed an iPhone/iPod dock for listening to uncompressed audio at unsurpassed sound quality levels...

Quite a beauty too. They protect their images from being embedded somewhere else, so you'll have to click the link above to see it.

Actually, I always found that to make an amp that sounds good when listening at low SPLs, a tube amp will be a fraction of the cost compared to when using transistors of any type.

Odd but true.

Comments

LoTN wrote on 11/26/2009, 12:57 PM
Rhaaaaaaa lovely :-)

It's been a long time that audiophiles love tube amps. Some of them with a single ended monotriode output stage delivering less than 10 W RMS can provide very nice results. And some crazy folks use 745 tubes with a 1.2 kV polarisation on the plate to deliver near to 25W. With speaker systems having a sensitivity of 92dB 1W/m it's a charm.
lynn1102 wrote on 11/26/2009, 4:46 PM
I always did and still do prefer tubes for audio. Ever wonder how many people out there never saw or even heard of a tube type anything.
Must be a age thing.

Lynn
farss wrote on 11/26/2009, 6:41 PM
If you love them tubes then this is mandatory viewing:




Sorry it's in three parts and a bit long. Like fine wine these take time to make.

Bob.
Coursedesign wrote on 11/26/2009, 7:00 PM
Bob, that was just precious!!!

Thanks, it made my day!


I met an oldtimer in Brixton, England who had made his own TV at an earlier age.

There were no Radio Shack stores in those days, so he wound his capacitors and made resistors by drawing parallel pencil lines until the resistance was just right...

No word on whether he did his own glass blowing to make the CRT though :O).

At one tube-only audio store here in L.A., they had a sticker that read, "Vacuum Tubes - It's the Law!"

Very well put... (insiders will understand :O)

John_Cline wrote on 11/26/2009, 8:57 PM
I own some classic McIntosh tube audio gear; a C22 tube preamp, a C24 preamp (their first solid-state preamp and a Class-A design), an MC240 40Wx2 amplifier, an MR71 FM tuner, a 1950s C8 mono preamp and a 20w2 mono power amp. I run the C22 and MC240 through four Altec-Lansing "Voice of the Theater" A7-500 speakers. (Which will produce 106db @ 1 watt.) This stuff is anything but flat and low distortion, but it is incredibly musical.

MC240 images
C22 images
C24 image
Altec-Lansing A7 loudspeaker

Curious that there is no such thing as highly desirable "classic" video gear.
LoTN wrote on 11/27/2009, 9:00 AM
Nice setup. VoTs are really amazing. Onken 360 with Altec 416B woofer and T925 as super tweeter are very good too.

For 'old' audio enthousiasts: http://www.audioheritage.org/ a lot of ressources on vintage JBL and Altec.
bsuratt wrote on 11/27/2009, 11:44 AM
Wow! John Cline you jogged my memory of the days when I owned four A7-500 speakers each driven by a 50 watt Dynakit Power Amp in my sound business. When the Beatles came to Atlanta in 1965 no one company had enough equipment to handle the job so the four companies in Atlanta at the time pooled all the equipment they had for the event. My four A7's were spaced across the turf to the left side of the stadium. The Power Amps were placed at the speakers with a 600 ohm feed from the board and a matching transformer.
As it turned out, no amount of sound equipment, (even modern day), could have completely overcome the screaming of 35,000 people! I think there were upwards of 20 A7's and some others.