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Multi-Way Conventional loudspeakers with crossovers

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Old 13th January 2019, 07:48 PM   #2591
lowmass is offline lowmass  United States
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GRS 12PF-8 12" Paper Cone Foam Surround Woofer


Anyone used this? Know where can get a response curve?


Price seems too good to be tru
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Old 13th January 2019, 08:10 PM   #2592
avincenty is offline avincenty  United States
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Default My Nao Note II RS

Built these last year and they sound great.

This is a "fastrack" setup in new house, need new furniture to include turntable and hide wires.

Najda DSP
Outlaw 5000 x 2
Squeezebox touch coax, Chromecast Audio SPDIF, receiver analog (video sources)
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Old 13th January 2019, 08:51 PM   #2593
korpberget is offline korpberget  Norway
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Lots of great space for furniture under the stereo!
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Old 19th January 2019, 09:32 PM   #2594
koja is offline koja  Canada
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last Fall my home brewed OB got a face lift and an update: the lower mid driver changed from Visaton B200 to AL200. Wider dispersion now. SQwise: as much as B200 could sound good, with this setup one realizes that it was still a distortion that sounded good. Now it sounds both more accurate and still good (better); with good recordings of course (disclaimer).

The active Xover had to change quite a bit. They are still operated as a 3-way. I may still implement the tweeter passively, though I cannot hear up there but maybe for the kids and the neighbour's dog . The star of this setup is the 4" Scanspeak which is such a fantastic driver. With AL200 under, the small SS got an even bigger role to play and still does the job with no signs of strain.

btw drivers are listed in my previous posts:
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p.s. in the picture my DIY F5+ACA amp is missing top cover since the grill is being changed (the amp was overheating in Summer).
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Last edited by koja; 19th January 2019 at 09:41 PM.
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Old 20th January 2019, 06:12 AM   #2595
kazap is offline kazap
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Quote:
Originally Posted by lowmass View Post
GRS 12PF-8 12" Paper Cone Foam Surround Woofer ..... price seems too good to be true
That GRS 12PF-8 has a very high QTS and low Xmax. It might need an H-baffle to air load and a multiple stack of 4-8 per side to do bass at good SPL.


GRS has a similar 12" GRS 12SW-4 12" Poly Cone Subwoofer 4 Ohm that has over twice the Xmax and a much better QTS for only twice the price, so its arguably better value for money?
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Old 20th January 2019, 05:50 PM   #2596
zmyrna is online now zmyrna  United Kingdom
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cover the holes on your baffle with thick pure wool felt and you will get much better extension from your mid drivers...
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Old 20th January 2019, 05:59 PM   #2597
scottjoplin is offline scottjoplin  Wales
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^ You are missing the reason for the baffle shape: LX521 Description
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Old 20th January 2019, 09:42 PM   #2598
Vix is offline Vix  Yugoslavia
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Quote:
Originally Posted by koja View Post
...the lower mid driver changed from Visaton B200 to AL200. Wider dispersion now. SQwise: as much as B200 could sound good, with this setup one realizes that it was still a distortion that sounded good....
Koja, nice implementation of an OB, a lot of space behind the drivers . I am still using Visaton B200, albeit with a phase plug.
I had also tried Fostex FE206e, but was not happy with it, Visaton sounds better in an OB...

Regards,
Vix
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Old 21st January 2019, 01:08 AM   #2599
koja is offline koja  Canada
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Quote:
Originally Posted by scottjoplin View Post
^ You are missing the reason for the baffle shape: LX521 Description
As for giving credit where credit's due: SL continues to live in my home :
LXminis are currently off duty and LX521s are waiting for spring to be finished.
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Old 21st January 2019, 09:16 AM   #2600
Kjeldsen is offline Kjeldsen  Denmark
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Quote:
Originally Posted by tru168 View Post
Hi all , here's my humble design with slot loaded full range.

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Why do you slot load the full range?
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