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Old 17th May 2010, 06:40 PM   #1
diyAudio Member
Join Date: May 2010
Location: Chicago IL
Default My first post

Hi all,

My name is Robert and I'm happy to be a new member here.

I have decades of experience with audio - both in circuit design and loud speaker design - but have been operating in a vacuum ( ) without other people to talk to and bounce ideas off of... so I'm glad to find this board.

I have a few audio systems all over my house. I'm in the process of re-doing the "main" one. Some of the electronics I have include a modified Dynaco PAS-3X, a pair of modified Dynaco Mark III's, and an un-modified Pilot SA-260 power amp. I also use solid-state electronics. Speakers are mostly home-made.

Looking forward to learning from all of you and hopefully being able to offer some useful ideas/information out to your community.

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Old 17th May 2010, 06:49 PM   #2
Glowbug is offline Glowbug  United States
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Join Date: Feb 2006
Location: Hillsborough, NC
Welcome to the forum

We like pictures, so post 'em up
The machine does not isolate us from the great problems of nature but plunges us more deeply into them. - Antoine de Saint-Exupéry
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Old 17th May 2010, 10:21 PM   #3
diyAudio Member
Join Date: May 2010
Location: Chicago IL

This is the cabinet where my electronics are housed. That's the Pilot 260 sitting on top:
Click the image to open in full size.

This is inside. The system is tri-amped. The Pilot SA-260 drives the tweeters, the two Dynaco Mark IIIs drive the mid-ranges, and that Crown D-150A drives the woofers. Other boxes are active crossovers and some EQ for the woofers to correct for room acoustics. The pre-amp is a re-worked Dynaco PAS-3X (top removed):
Click the image to open in full size.

One of the speakers. Two pieces. The tops have 4 tweeters and 4 midranges. The bottom has one 12" woofer:
Click the image to open in full size.

Close-up of one of the tops. The speakers for the other channel are mirror images of these. Someday (?) I'll work on the cosmetics:
Click the image to open in full size.

I'm in the process of re-doing the system. First, I'm going to move it all to another (much larger) room. I'm planning on designing a passive crossover for the tweeters so I can free up that Pilot amp for something else. Finally, both woofers need re-foaming and I'm having a little trouble finding the right foams. I may post elsewhere about that.

That's my baby.
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Old 21st May 2010, 01:47 AM   #4
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Join Date: Jan 2004
Location: Near Vancouver
Hello Robert and welcome.
planet10 needs your help:
Let's help Ruth and Dave
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Old 21st May 2010, 02:16 AM   #5
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Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Welcome to the forum Robert. I'm sure becoming part of the online community here will bring up a whole bunch of ideas...

community sites,, ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
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Old 21st May 2010, 02:38 AM   #6
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Join Date: Nov 2007
Location: Petaling Jaya, Malaysia.
Welcome Robert!
Nice set up you have there!
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Old 27th May 2010, 04:58 AM   #7
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Join Date: Sep 2008
Location: cebu city,phil.
Send a message via Yahoo to kirk simone
nice work sir
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