Frugal Horn Mk3 builds

Dedicated to those large boxes at one end of the room
User avatar
planet10
Old Hand
Posts: 484
Joined: Sun Sep 23, 2007 4:32 pm
Location: The Colonies
Contact:

Post by planet10 » Mon Jan 24, 2011 8:34 pm

colin.hepburn wrote: Mark 2 Frugal horn
There never was a Mk2 Frugel-Horn. Mk1 level 0, 1, 2A, 2B, 3
The new mark 3 does’t really qualify as a true horn
Scott will have you on that. This same went on at diyAudio. FH Mk3 is a tapped horn using a trick that Scott pulled from an Olson horn patent (and a variant also used in the Klipschorn.

In actual fact, because of the trick the FH Mk3 is a horn to lower frequencies than the Mk 1 (which at the lowest frequency should be considered a "TL")

dave

User avatar
colin.hepburn
Shed dweller
Posts: 2303
Joined: Sat Jun 02, 2007 1:24 am
Location: Scotland Aberdeenshire

Post by colin.hepburn » Mon Jan 24, 2011 9:12 pm

planet10 wrote:
colin.hepburn wrote: Mark 2 Frugal horn
There never was a Mk2 Frugel-Horn. Mk1 level 0, 1, 2A, 2B, 3
The new mark 3 does’t really qualify as a true horn

In actual fact, because of the trick the FH Mk3 is a horn to lower frequencies than the Mk 1 (which at the lowest frequency should be considered a "TL")

dave
Sorry but what trick :)
Colin
The Blues man ImageImage

chris661
Shed dweller
Posts: 2080
Joined: Mon Feb 22, 2010 7:29 am
Location: Sheffield

Post by chris661 » Mon Jan 24, 2011 9:43 pm

Nice work again there Mr T.
If you can see the cone move regularly, you haven't got enough speaker.

User avatar
Scottmoose
Old Hand
Posts: 1402
Joined: Sat Sep 08, 2007 11:03 am
Contact:

Post by Scottmoose » Mon Jan 24, 2011 10:29 pm

deleted
Last edited by Scottmoose on Mon Oct 03, 2011 9:59 pm, edited 2 times in total.

User avatar
colin.hepburn
Shed dweller
Posts: 2303
Joined: Sat Jun 02, 2007 1:24 am
Location: Scotland Aberdeenshire

Post by colin.hepburn » Mon Jan 24, 2011 10:50 pm

Scottmoose wrote:Why doesn't FH3 qualify as a true horn? A horn is a tube that expands toward the terminus.* FH3 is a tapped horn, viz. a horn where the driver is tapped into the expansion at x distance from the throat. It does have a choke inserted into the flare path per Olson to help provide a sharper upper corner frequency; it does not affect the cutoff / tuning frequency of the horn (which started as a hypex if you're interested).

*The length and expansion profile set the tuning frequency of a tube that is open at one end; the terminus cross sectional area determines the lowest frequency it will be impedance matched to.
Hi Scott
OK I accept your explanation Its is just to me a horn speaker is more a kina to frugal horn Mk1 or the large PA system I used to work with 16ft horns and these which I used as part of my disco bass units
So which version works best with the Fostex FE126N the Mark 1 or 2 could give me general run down as to why
Attachments
15-bass-scoop-print1.gif
Colin
The Blues man ImageImage

User avatar
Scottmoose
Old Hand
Posts: 1402
Joined: Sat Sep 08, 2007 11:03 am
Contact:

Post by Scottmoose » Mon Jan 24, 2011 11:11 pm

deleted
Last edited by Scottmoose on Mon Oct 03, 2011 9:59 pm, edited 1 time in total.

User avatar
colin.hepburn
Shed dweller
Posts: 2303
Joined: Sat Jun 02, 2007 1:24 am
Location: Scotland Aberdeenshire

Post by colin.hepburn » Mon Jan 24, 2011 11:21 pm

AH that’s the problem I have about the frugal as I cant corner-loaded I can only fire them across the room brick back wall room size 15.6ftx10.6ft
Colin
The Blues man ImageImage

User avatar
Scottmoose
Old Hand
Posts: 1402
Joined: Sat Sep 08, 2007 11:03 am
Contact:

Post by Scottmoose » Mon Jan 24, 2011 11:35 pm

You may get away with it with the additional rear-deflector from the Mk1, which is an option for the Mk3 too. Depends on how much LF gain you're after really, it varies depending on the driver employed. The 126 needs corner loading, the MA drivers are happy with a rear-boundary only. If the FE126En is the unit you want, it might be worth you considering something like Ron's A126, which is designed for rear-boundary, rather than corner loading.
Last edited by Scottmoose on Tue Jan 25, 2011 9:59 am, edited 3 times in total.

User avatar
colin.hepburn
Shed dweller
Posts: 2303
Joined: Sat Jun 02, 2007 1:24 am
Location: Scotland Aberdeenshire

Post by colin.hepburn » Mon Jan 24, 2011 11:44 pm

Thanks Scott
i will check out Ron's A126 think i have seen it but didn't take to much notice at the time :)
Colin
The Blues man ImageImage

User avatar
Dave the bass
Amstrad Tower of Power
Posts: 10083
Joined: Tue May 22, 2007 4:36 pm
Location: NW Kent, Darn Sarf innit.

Post by Dave the bass » Tue Jan 25, 2011 10:40 am

Very very nice looking (speaker, not you!) there Colin.

I've always wanted to hear a pair of these like many others here. I went as far as the downloading all the plans for the all the Mk1 variations in prep to build them.....then along came the Sab's. Still tempted to build a pair of fully-complicated Mk1's with Supra-Doopra dog collar Baffle and bell's n whistles.

I've got a spare pair of P10 treated Blue coloured FE126's sitting in the cupboard... Hmmmm <rubs chin>

Next Owston is shaping up nicely innit :-)

DTB
"...songs are just really interesting things to be doing with the air..."

User avatar
cressy
Shed dweller
Posts: 2909
Joined: Fri Aug 03, 2007 7:07 pm
Location: the great white space
Contact:

Post by cressy » Tue Jan 25, 2011 10:56 am

must be steves news that owston is in good shape to be ready for our annual pilgrimage, its set us off in a build frenzy :D

User avatar
Dave the bass
Amstrad Tower of Power
Posts: 10083
Joined: Tue May 22, 2007 4:36 pm
Location: NW Kent, Darn Sarf innit.

Post by Dave the bass » Tue Jan 25, 2011 11:02 am

cressy wrote:must be steves news that owston is in good shape to be ready for our annual pilgrimage, its set us off in a build frenzy :D
I think you're right our-Ant!

Owston is our Anode, we're the Electrons, here we come :-)

DTB
"...songs are just really interesting things to be doing with the air..."

User avatar
pre65
Amstrad Tower of Power
Posts: 16634
Joined: Wed Aug 22, 2007 11:13 pm
Location: Ashen Sudbury Suffolk

Post by pre65 » Tue Jan 25, 2011 11:09 am

Dave the bass wrote:
cressy wrote:must be steves news that owston is in good shape to be ready for our annual pilgrimage, its set us off in a build frenzy :D
I think you're right our-Ant!

Owston is our Anode, we're the Electrons, here we come :-)

DTB
My filament supply has packed up. :(
People are like stained-glass windows. They sparkle and shine when the sun is out, but when the darkness sets in, their true beauty is revealed only if there is a light from within
Dr Elisabeth Kubler-Ross

G-Popz THE easy listening connoisseur. (Philip)

User avatar
Toppsy
Shed dweller
Posts: 2020
Joined: Mon Jul 23, 2007 12:10 pm
Location: red rose country
Contact:

Post by Toppsy » Tue Jan 25, 2011 12:22 pm

My filament supply has packed up. :(
Don't ya worry there our Phil. Mine burnt out years ago :roll:

Dave,

I think ya should build a pair the MK1 for Owsters comparison.
Your fettled P10 drivers are more suited to this design (I would say). As they would be test-beds and quite smallish floorstanders I'd be tempted (If I were you) to build them in 18mm MDF. :!: Burn the witch, I hear you say :shock: But for my money and for less half the price a sheet of quality 18mm BBP, it'll be a cheap experiement.

The Mk1 cabs are very well braced and designed (I believe) for 15mm thick sheet material. So stiffness shouldn't be an issue. And in any case the Mk3's I'm presently building are from 18mm MDF cos I can't afford the price of 2-sheets BBP for this build. The veneer I've had for over 2-years and was just begging to be used.

Go for it our Davey boy. Now there's a challenge if ever I saw one. :wink:

User avatar
Scottmoose
Old Hand
Posts: 1402
Joined: Sat Sep 08, 2007 11:03 am
Contact:

Post by Scottmoose » Tue Jan 25, 2011 2:18 pm

deleted
Last edited by Scottmoose on Mon Oct 03, 2011 9:59 pm, edited 2 times in total.

Post Reply

Who is online

Users browsing this forum: No registered users and 3 guests