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Classic Fonken GR
Classic Fonken GR
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Old 3rd October 2012, 03:06 PM   #1
MEGA_amp is offline MEGA_amp
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Default Classic Fonken GR

I built this Classic Fonken GR a few years ago when the FE127E was widely available. I like this design alot; it fit my room, and sounded very good with a 10w son of zen. I've since burned out one of the drivers....fiddling with wires on the amp. I've looked through various threads on here, and couldn't really find anything definitive as to which driver would be a drop in replacement or as close to drop in as possible. I'd like to re-use these boxes if possible without much if any modification to the boxes themselves. I've looked at mark audio and others, but am currently lost....any help would be appreciated!!

box link: http://p10hifi.net/tlinespeakers/FAL...nkenGR-map.pdf

Thanks!!
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Old 3rd October 2012, 08:13 PM   #2
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Originally Posted by MEGA-amp View Post
I built this Classic Fonken GR a few years ago when the FE127E was widely available. I like this design alot; it fit my room, and sounded very good with a 10w son of zen. I've since burned out one of the drivers....fiddling with wires on the amp. I've looked through various threads on here, and couldn't really find anything definitive as to which driver would be a drop in replacement or as close to drop in as possible. I'd like to re-use these boxes if possible without much if any modification to the boxes themselves. I've looked at mark audio and others, but am currently lost....any help would be appreciated!!

box link: http://p10hifi.net/tlinespeakers/FAL...nkenGR-map.pdf

Thanks!!
well, if you've been quite happy with the FE127E, there may still be some "previously driven" kicking around, with or without polka dots - barring that, the most direct drop in replacement Fostex would probably be the FF125WK - of course the tuning might require some adjustment ( Dave could advise), and you'd be subject to the extended break-in that is possibly a distant memory to you now, but about which you're always reminded when firing up a new pair fresh from the box
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Old 3rd October 2012, 09:43 PM   #3
planet10 is offline planet10  Canada
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Classic Fonken GR
selling pair Fostex 127E

The EL70 will fit nicely in the same volume, the tuning would need to be changed and the rebate and likely the holey brace, really only easierif the vent spacers are wider (ie lower tuning). I'm on the road so can't check my drawing.

The FF125wk would physicallt drop in (requiring some holey brace adjustment), but it really likes a smaller box, so for optimum results you'd need to add some solid fill inside (an opportunity to irregulize the inside -- see the "taking the air cavity to the next level" thread.

dave
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Old 3rd January 2013, 07:51 PM   #4
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I picked up a pair of FE126En with intentions of building the Frugel-Horn Mk3. I'd like to drop in the FE126En in the box noted above for the purpose of driver break-in. Without physically modifying the GR box, is there any way to make these boxes 'liveable' while the FH3 is being built? BSC, added dampening...etc? I'm not after super great sound or accuracy, just a modification that's tolerable.

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-John
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Old 3rd January 2013, 08:22 PM   #5
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The GR Fonken is not suited for the FE126 at all, it will fit right in but you will get no bass to speak of.

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Old 3rd January 2013, 08:38 PM   #6
chrisb is offline chrisb
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Originally Posted by MEGA-amp View Post
I picked up a pair of FE126En with intentions of building the Frugel-Horn Mk3. I'd like to drop in the FE126En in the box noted above for the purpose of driver break-in. Without physically modifying the GR box, is there any way to make these boxes 'liveable' while the FH3 is being built? BSC, added dampening...etc? I'm not after super great sound or accuracy, just a modification that's tolerable.

Thanks!!


-John

John: I think it's safe to say that the 126 will "work" well enough in this enclosure for break-in purposes, just don't expect the same LF performance possible with the FH3 or other capable BLH etc enclosure.
While EQ could be used to "lift" the sagging bass response, it would require substantially higher power levels, while the driver's X-Max would would still limit the attainable SPL

edit; well I see that Dave beat me with a shorter reply while I was multi-tasking
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