Author Topic: Spectro Acoustics  (Read 56917 times)

Robin

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Re: Spectro Acoustics
« Reply #165 on: December 24, 2018, 09:34:33 AM »
The 217R has a rack mount face plate. That is the only difference.
Robin Gudgel

olddude55

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Re: Spectro Acoustics
« Reply #166 on: December 30, 2018, 10:06:38 AM »
How about the headphone jack?  Judging by the pictures, not all 217s have the headphone jack.
Which is the biggest surprise of all.  The 217 is an outstanding headphone amp if nothing else.  Can't believe how much better my headphones sound over the DB amp I've been using for the last ten years or so.

Robin

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Re: Spectro Acoustics
« Reply #167 on: December 30, 2018, 01:33:43 PM »
I forgot about the headphone jack.
It is just in parallel with the output.
When Brian Morrison designed the 217, it was the first all integrated circuit preamp. We did not do this because of technology. I believe it was just the easiest way to do it. IC's that were capable of this application were very new so we took advantage of it.
None of the Spectro engineers had any formal schooling in electronics. We were just all passionate about electronics.
Robin Gudgel

boB

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Re: Spectro Acoustics
« Reply #168 on: December 30, 2018, 02:06:35 PM »
I don't think that MY 217R has a headphone jack ?   Did I get a raw deal ?

Happy new year-ish !
 
K7IQ

onanparts

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Re: Spectro Acoustics
« Reply #169 on: January 03, 2019, 06:52:26 PM »
I don't think that MY 217R has a headphone jack ?   Did I get a raw deal ?

Happy new year-ish !

boB, I think you had some connections at SA.... Got a deal on an early model?  :) My #009 has no jack, but #440 does.

I got the deluxe kit, it had a solar cell and a meter.

Midnite B17-10 20kW