Vintage Infinity FET Preamp

john65b · 12th August 2009, 01:27 AM

Just got one real cheap...anyone know anything about it? I have read that there were only about 200 sold, since they cost the equivalent of an average Automobile in 1974.

I didn't know Infinity did anything but speakers. Apparently at one time they built other components. This preamp's matched amp was probably one of the first Class D amps...but its the preamp that got all the rave...

This thing is going to get a little more critical listening...actually sounds quite nice.

aparatusonitus · 12th August 2009, 01:55 AM

Is it this one?

http://www.davidsaudio.com/Infinity_FET_Preamp.pdf

john65b · 12th August 2009, 02:20 AM

Yes, that's it...very nice condition, blue backlight and wood sides...

jez · 16th December 2009, 01:06 PM

I seem to remember Infinity showing some valve or hybrid gear at the Harrogate international festival of sound back around 1980... I never heard anything more about this equipment, may have been a prototype?

Zen Mod · 16th December 2009, 03:00 PM

oh boy - dunno for sound , but story in their pdf is even more than usual selling department drek

I'm still laughing

john65b · 16th December 2009, 04:08 PM

It actually was a production unit.

I bought it for $50, and sold in on Fleabay to a collector in Italy for $500. Not bad...It actually sounded quite good for being 40 years old

12th August 2009, 01:27 AM	#1
john65b diyAudio Member Join Date: Jan 2005 Location: Chicago	Vintage Infinity FET Preamp Just got one real cheap...anyone know anything about it? I have read that there were only about 200 sold, since they cost the equivalent of an average Automobile in 1974. I didn't know Infinity did anything but speakers. Apparently at one time they built other components. This preamp's matched amp was probably one of the first Class D amps...but its the preamp that got all the rave... This thing is going to get a little more critical listening...actually sounds quite nice. __________________ "I speak Spanish to God, Italian to Women, French to Men, and German to my Horse" - Charles V

12th August 2009, 01:55 AM	#2
aparatusonitus diyAudio Member Join Date: Jan 2004 Location: Split, Croatia	Is it this one? http://www.davidsaudio.com/Infinity_FET_Preamp.pdf __________________ Non é mai abbastanza...

12th August 2009, 02:20 AM	#3
john65b diyAudio Member Join Date: Jan 2005 Location: Chicago	Yes, that's it...very nice condition, blue backlight and wood sides... __________________ "I speak Spanish to God, Italian to Women, French to Men, and German to my Horse" - Charles V

16th December 2009, 03:00 PM	#5
Zen Mod diyAudio Member Join Date: Jan 2003 Location: ancient Batsch , behind Iron Curtain	oh boy - dunno for sound , but story in their pdf is even more than usual selling department drek I'm still laughing __________________ my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; BAF Forum & Gallery;I'm dumb

16th December 2009, 04:08 PM	#6
john65b diyAudio Member Join Date: Jan 2005 Location: Chicago	It actually was a production unit. I bought it for $50, and sold in on Fleabay to a collector in Italy for $500. Not bad...It actually sounded quite good for being 40 years old __________________ "I speak Spanish to God, Italian to Women, French to Men, and German to my Horse" - Charles V


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16th December 2009, 01:06 PM	#4
jez diyAudio Member Join Date: Jan 2004 Location: n.e england	I seem to remember Infinity showing some valve or hybrid gear at the Harrogate international festival of sound back around 1980... I never heard anything more about this equipment, may have been a prototype?

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