AR-90 Bi-Amping

[administrator]

Thanks again to Cliff, there are now some notes from "George" at AR to a customer regarding bi-amping AR-90's. I think you will all enjoy these. Anyone know what George's full name was?

http://www.arsenal.net/speakers/ar/ar-9/ar9.htm

Mark

[Guest lmrosenthal]

>Thanks again to Cliff, there are now some notes from "George"

>at AR to a customer regarding bi-amping AR-90's. I think you

>will all enjoy these. Anyone know what George's full name

>was?

>

>http://www.arsenal.net/speakers/ar/ar-9/ar9.htm

>

>Mark

>

Hi Mark,

If you look at page 1, on the upper right-hand corner under the Teledyne logo, you'll see the hand written " G. Short." Could this be it?

Regards,

Larry

[r_laski]

I think Larry is correct. Here is a link to George E. Short III’s current company web site. http://www.northcreekmusic.com/

If you read his background, http://www.northcreekmusic.com/#NCMSDesignersBackground he was at AR from 1988 to 1990. He provides a wealth of information on some of the key people who worked at AR and some of the work he was involved in. Logical that he would have written the note. Look at who had worked at the desk he was given.

Rich Laski

[Guest Brian_D]

Not finding the link guys... Am I just blind?

[r_laski]

>Not finding the link guys... Am I just blind?

Brian, the links are there, not sure why you’re not seeing them. :-(

Below, I’ve removed the “http: // www.” (

northcreekmusic.com/

And for the background (which you can also scroll down to on the homepage):

northcreekmusic.com/#NCMSDesignersBackground

Hope this helps.

BTW, if anyone is interested in speaker crossover caps information, there is some good stuff on his “Capacitors FAQs” and “The Art of Bypassing” pages.

http://www.northcreekmusic.com/CapacitorFAQ.html

northcreekmusic.com/CapacitorFAQ.html and

http://www.northcreekmusic.com/Bypassing.html

northcreekmusic.com/Bypassing.html

Rich Laski

[rrcrain]

I did rewire my pair of AR90s for biamping and have to say that it did improve the overall soundstage. In addidion, many of the softer passages and background information now comes through rather than being swamped by the bass signal. I'm not using an active crossover at this time as I've yet to find one that sounds decent and am depending on the speakers own crossover network to do its job. This does result in some very minor bleed thru in the bass section, but at the same time, its an extremely smooth, rich and natural sound without the harshness Ive experienced so far with the one crossover I've tried to date.

[Guest Bret]

>This does result in some very minor bleed thru in the bass section<

What is bleeding thru?

Bret

[rrcrain]

Bleedthrough is when a small portion of the wrong frequency comes through the crossover. As an example, a few singers voices come through the bass section of my speakers, which is odd as the main culprites appear to be female singers such as Faith Hill.

[Guest Brian_D]

No, I'm talking about the link on the AR9 page. I don't see anything regarding biamping the 90.

-Brian

>>Not finding the link guys... Am I just blind?

>

>Brian, the links are there, not sure why you’re not seeing

>them. :-(

> Below, I’ve removed the “http: // www.” (

>another hyperlink):

>

>northcreekmusic.com/

>

>And for the background (which you can also scroll down to on

>the homepage):

>

>northcreekmusic.com/#NCMSDesignersBackground

>

>Hope this helps.

>

>BTW, if anyone is interested in speaker crossover caps

>information, there is some good stuff on his “Capacitors FAQs”

>and “The Art of Bypassing” pages.

>

>http://www.northcreekmusic.com/CapacitorFAQ.html

>

>northcreekmusic.com/CapacitorFAQ.html and

>

>http://www.northcreekmusic.com/Bypassing.html

>

>northcreekmusic.com/Bypassing.html

>

>

>Rich Laski

[r_laski]

My Bad Brian.

I didn't see your reply was to original posting , not my message right above it. Apologies.

After you click on the link Mark put in the original posting (the AR vertical series links)

http://www.arsenal.net/speakers/ar/ar-9/ar9.htm

Between the AR-90 Owner's Manual Zip file link and the AR-90 Crossover Blueprint 1/3 jpg file link is a link to a zip file entitled:

Notes from "George" at AR to a customer regarding AR-90 Bi-Amping. This is the one.

Rich Laski

[administrator]

I hit George with a blast from the past .. he gave me permission to post our email thread:

-----Original Message-----

From: North Creek Info

Sent: Friday, April 18, 2003 7:09 AM

To: Mark G. Spencer

Subject: Re: AR-90 Bi-Amplification Notes

Hello!

Well, it was me. I can tell by the writing - and my last name is in

the upper right corner.

That said, I freely admit I have no recollection of it and most likely it was Alex DeKoster (then VP-engineering) who delegated this to me.

If memory serves, he was part of the design team for most of the 80's. I have no idea where he is now - maybe Polk?

Thank you!

-George

----- Original Message -----

From: "Mark G. Spencer"

To: "'North Creek Info'"

Sent: Thursday, April 17, 2003 6:14 PM

Subject: RE: AR-90 Bi-Amplification Notes

Hi George!

Thanks for the reply. In the note it is mentioned that the author was

not at AR during the AR-90 design, maybe this could still be your

work? I'm attaching the first page for you.

Anyway, just curious .. I wanted to attribute the notes to the correct

author.

I'm one of the AR addicts .. I have four of Ken Kantor's AR 303a's

surrounding me in the living room. Now I need more rooms to buy more

audio stuff.

Mark

-----Original Message-----

From: North Creek Info

Sent: Thursday, April 17, 2003 2:29 PM

To: Mark G. Spencer

Subject: Re: AR-90 Bi-Amplification Notes

Hello!

Well, I was unable to open the file, but probably it was not from me.

I was not part of AR during those years, only briefly in 1988 - 2000. I worked on bringing the Spirit line into the US from the UK, mostly I just did research.

Glad to see you are keeping the classic AR alive.

-George