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someone diy a scaled down 30.7 (kinda)

72.199.165.123

Posted on May 18, 2021 at 18:28:28
Green Lantern
Audiophile

Posts: 15754
Location: San Diego, Ca
Joined: November 12, 2002
Contributor
  Since:
June 17, 2003

is this our Andyr?
Poor man's 30.7


 

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    ...
Gotta be , posted on May 18, 2021 at 18:47:23
grantv
Manufacturer

Posts: 6446
Location: B.C.
Joined: January 15, 2002
Andy, why selling?

 

I hope AndyR has some ..., posted on May 19, 2021 at 09:08:53
emailtim
Audiophile

Posts: 2370
Joined: July 2, 2017
I hope AndyR has some 20.7's or 30.7's lined up as replacements.

 

Well the seller listed is "andyr" so.... (nt), posted on May 19, 2021 at 09:46:40
Barry
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Posts: 814
Joined: November 24, 1999
Contributor
  Since:
January 18, 2009
Hmmmm

 

That's what I'm assuming..., posted on May 19, 2021 at 09:51:56
grantv
Manufacturer

Posts: 6446
Location: B.C.
Joined: January 15, 2002
He hasn't posted here for a few days... will see.

 

RE: That's what I'm assuming..., posted on May 19, 2021 at 10:38:13
Roger Gustavsson
Audiophile

Posts: 1842
Location: Huskvarna
Joined: February 12, 2010
Andy is downsizing.

 

Posted somewhere?, posted on May 19, 2021 at 11:12:47
grantv
Manufacturer

Posts: 6446
Location: B.C.
Joined: January 15, 2002
I somewhat get it if he's in that room he posted some time back, it was pretty small IIRC.

 

RE: Posted somewhere?, posted on May 20, 2021 at 01:26:07
Roger Gustavsson
Audiophile

Posts: 1842
Location: Huskvarna
Joined: February 12, 2010
I have seen pictures of what he will be using, it is not Magnepan but it is an open baffle design that will fit small rooms.

 

RE: Posted somewhere?, posted on May 20, 2021 at 09:42:42
emailtim
Audiophile

Posts: 2370
Joined: July 2, 2017
Thanks for the hint.

Looks like AndyR is a true diehard DIY'er as we already knew !!!

Reminds me of the Aussie Kyron designs.

 

RE: Posted somewhere?, posted on May 20, 2021 at 09:48:08
Roger Gustavsson
Audiophile

Posts: 1842
Location: Huskvarna
Joined: February 12, 2010
I have some pictures from Andy. Maybe he will show them here.

 

RE: Indeed a 'diy scaled down 30.7'! ..., posted on May 20, 2021 at 15:43:13
andyr
Manufacturer

Posts: 12244
Location: Melbourne
Joined: September 2, 2000

I put that ad on Aussie Audio Mart - and had no idea it would be replicated across their other sites.

Yes, the end of an era - nearly 30 years with Maggies. :-(( The combination of:
a. wanting to get some brownie points from wifey, and
b. the room really being overwhelmed by 4 large panels

... prompted me last year (during lockdown) to start thinking of what I could replace them with - which would:
a. satisfy me, musically, and
b. have a minimal impact on the room (which is not a man-cave), and
c. be 2-way active - and able to go down to where the subs would take over.

This is what I came up with:













They hand over to my subs (in the front corners of the room) at 100-160Hz - still playing with that - while the XO between mid/bass and ribbon is @ 2800Hz.

Yes, Tim - they were inspired by the Kyron 'Gaias'! :-))

Having no baffle, there is a big hole below 500Hz; I had originally thought I might get away with only one mid/bass driver but the REW measurements I did with this setup showed that this just wasn't going to happen! :-((

With four mid/bass drivers ... only a small amount of EQ is required on the mid/bass drivers, with:
* subs being attenuated by 12dB, and
* tweeters by 8dB.

Drivers are:
* mid/bass - SB Acoustics 6 1/2" 'Satori' Textreme driver (MW16TX-4), and
* tweeter - Satori ribbon tweeter (AT60NC-4).

They are completely satisfying to listen to - and my wife is delighted with them!

Andy

 

Big change., posted on May 21, 2021 at 07:24:28
grantv
Manufacturer

Posts: 6446
Location: B.C.
Joined: January 15, 2002
Glad you're enjoying them Andy...

 

RE: Thanks, Grant - I certainly am! nt, posted on May 21, 2021 at 16:13:50
andyr
Manufacturer

Posts: 12244
Location: Melbourne
Joined: September 2, 2000
.

 

if that's your DIY, te salute Don andyr! nt, posted on May 22, 2021 at 13:01:01
farfetched
Audiophile

Posts: 852
Location: Cleveland!
Joined: October 13, 2010
.


/ optimally proportioned triangles are our friends


 

RE: Thank you! :-)) nt, posted on May 22, 2021 at 15:05:21
andyr
Manufacturer

Posts: 12244
Location: Melbourne
Joined: September 2, 2000
.

 

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