This is a post really for Dave (planet-10)
Ages back, you had a pic of some woofers you had put together for the fonkens - they actually worked as stands for the fonkens and shared the same profile as them.
Are plans available for them?
TIA,
Fran
Ages back, you had a pic of some woofers you had put together for the fonkens - they actually worked as stands for the fonkens and shared the same profile as them.
Are plans available for them?
TIA,
Fran
woodturner-fran said:
Yes. But althou performance is good i know we can get more out of the SDX7 so the SDX7 are going into something new (and simplier/sealed) and i have a set of different more suitable drivers (surplus pulled from the warehouse -- not eavailable new, so scarce -- but i may be able to scare some up).
The new ones are easily buildable from the old ones, with only a couple tweaks.
And i'm sure any number of drivers would work (i like midbasses with extended response). Maintaining the Fonken footprint, and keeping the height down to reasonable, you end up with a maximum of 28 litres ro work with.
dave
Thanks for the info - I will watch and wait!
The reason for asking is that I recently got a sub - it was a dead kef one, and probably not a very high end one either. Anyway, I fixed the (electronic) problems that it had and got it working. Tried it with the fonkens and boy did it make a difference. They really improved - and they weren't bad to begin with. Its like as if taking that bit of bass work from them really allows them to shine. SQ is now pretty much top notch - maybe they aren't the best ever on very complex loud/compressed stuff, but on everything else they shone.
They really are impressive now. So I was thinking at some stage down the line of trying something like what you had. I have a pair of 8" bass drivers (don't know what else about them though) and was thinking they might work in there. Matching stands would look very well though.
Fran
The reason for asking is that I recently got a sub - it was a dead kef one, and probably not a very high end one either. Anyway, I fixed the (electronic) problems that it had and got it working. Tried it with the fonkens and boy did it make a difference. They really improved - and they weren't bad to begin with. Its like as if taking that bit of bass work from them really allows them to shine. SQ is now pretty much top notch - maybe they aren't the best ever on very complex loud/compressed stuff, but on everything else they shone.
They really are impressive now. So I was thinking at some stage down the line of trying something like what you had. I have a pair of 8" bass drivers (don't know what else about them though) and was thinking they might work in there. Matching stands would look very well though.
Fran
Which drivers did you use and at what hz, did you crossover to make the workload less? I'm trying something similar. Thanks.
I used a kef sub - as in a commercially made sub... its a rather small one, and I'd say originally sold as part of a mid range home cinema set up.
I can't tell you exactly what freq the cut off is at, but its fairly low on the dial, and the volume is fairly low too (no markings on this thing to guide you). I played around with it a bit and thats what I left it at.
It really does make a good difference.
A caveat though: I have a sneaking suspicion that something is a little off with my fonken build. I don't know what it is, cos I've taken all the measurements and all are within 1mm of expected. But I seem to have complained more about bass than anybody - most are vey happy with them. The other thing is that my room is pretty large and they may well be a bit lost in it. You might not need a sub at all.
Fran
I can't tell you exactly what freq the cut off is at, but its fairly low on the dial, and the volume is fairly low too (no markings on this thing to guide you). I played around with it a bit and thats what I left it at.
It really does make a good difference.
A caveat though: I have a sneaking suspicion that something is a little off with my fonken build. I don't know what it is, cos I've taken all the measurements and all are within 1mm of expected. But I seem to have complained more about bass than anybody - most are vey happy with them. The other thing is that my room is pretty large and they may well be a bit lost in it. You might not need a sub at all.
Fran
woodturner-fran said:
Measurements show that the FonkenTLs did not add much extension to the Fonken, but they add a lot of weight, and with the Fonken rolled off below 100 Hz it really does make a difference in my largish room. (24x36 with a ceiling that peaks at 16')
dave
Thats probably teh expression I was looking for - weight.
Anyway, tell you this, they really shine now. These I could now live with completely and not miss my reference quads.
Fran
edgebc said:
Mine use a pair of CSS SDX7 per side push-push. Actively XOed at 100 Hz.
An externally hosted image should be here but it was not working when we last tested it.
And to show how little "measured" extension they provide (obviously measures only tell a small part of the story) -- with a little electronic trickery i know i can get the new fonkenWoofs to 25 Hz in room.
dave
Beautiful..........
I assume those are the 127s....are there plans on the the subs?
Powered separately? With an AV Yamaha, I could use B speakers connection?....Through an active XO.....is there a program to do that through a PC ? Probably not...Which and where do you find an active XO? So many ?s....so many speakers!.....Just finished the Sachikos and thinking of the next ones.
I assume those are the 127s....are there plans on the the subs?
Powered separately? With an AV Yamaha, I could use B speakers connection?....Through an active XO.....is there a program to do that through a PC ? Probably not...Which and where do you find an active XO? So many ?s....so many speakers!.....Just finished the Sachikos and thinking of the next ones.
Dave,
I have 4 x bass speakers from an old pair of B&W speakers - 7" sets. They measure 11.7R impedance and are c.1985 vintage. I also have 2 no-name 10" coaxial drivers that have output upto about 12kHz.
Do you think I could make up something like your "stands" using the B&W drivers? I mean, I have the outside measurements (!) but after that I haven't a clue. Is it just a sealed box of the right internal volume with bracing?
God, and I'm posting in the sachiko thread at the same time. Busy times here!
Fran
I have 4 x bass speakers from an old pair of B&W speakers - 7" sets. They measure 11.7R impedance and are c.1985 vintage. I also have 2 no-name 10" coaxial drivers that have output upto about 12kHz.
Do you think I could make up something like your "stands" using the B&W drivers? I mean, I have the outside measurements (!) but after that I haven't a clue. Is it just a sealed box of the right internal volume with bracing?
God, and I'm posting in the sachiko thread at the same time. Busy times here!
Fran
woodturner-fran said:
We;d either need T/S parameters or know what B&W they came out of (and the dimensions of that). Whether the box is sealed or ported is really dependent on what the driver likes.
The discussion of doing what you need has its own thread all-ready so alot of the questions you haven't asked yet are probably answered.
http://www.diyaudio.com/forums/showthread.php?s=&threadid=136956
Ben is building some woofers with some surplus Eastech woofers i had (same driver as i'll be using to fill the holes in the FonkenWoofTL when i take the SDX7 out.
dave
OK,
The B&W were DM220, the drivers are labelled as BZ200/16, the box they came out of was 265mmx 650mm x 290mm, which as far as I can make out is 50 litres - and that was a simple sealed box with the 2 bass/mid drivers mounted directly under a 1" tweeter, lots of wadding in the box no internal partitions or anything in there if I remember correctly. ( I still have these boxes although I kinda, eh, "modified" them for other uses!)
Thanks for the link to the thread.
Fran
The B&W were DM220, the drivers are labelled as BZ200/16, the box they came out of was 265mmx 650mm x 290mm, which as far as I can make out is 50 litres - and that was a simple sealed box with the 2 bass/mid drivers mounted directly under a 1" tweeter, lots of wadding in the box no internal partitions or anything in there if I remember correctly. ( I still have these boxes although I kinda, eh, "modified" them for other uses!)
Thanks for the link to the thread.
Fran
To accomodate 50 litres they'll need to flare out at the bottom or back... be nice to have some measures.
dave
dave
Dave,
I received the Fonkenwoof plans from you a while back and have been scrounging up the funds for the SDX7's. With Two kids in college they might be obsolete before I can put it together. Just a thought... how would this speaker fair in place for the time being?
I have two already in a sub.
http://www.parts-express.com/pdf/264-832s.pdf
Not in the same class but?????
Thanks
Dan
I received the Fonkenwoof plans from you a while back and have been scrounging up the funds for the SDX7's. With Two kids in college they might be obsolete before I can put it together. Just a thought... how would this speaker fair in place for the time being?
I have two already in a sub.
http://www.parts-express.com/pdf/264-832s.pdf
Not in the same class but?????
Thanks
Dan
Hard to say. Do you know if anyone has done actual measures of field units. TBs specs have some noterity.
The TL version fo the FonkenWoof is not the best use of the SDX7. I have new (surplus) Eastech drivers for mine, and the SDX7 are going to go into a sealed box (slightly smaller, but heavily damped to make them appear larger).
You can use any driver(s) in a generic fonkenwoof, you are just limited by ~28 litres if you want to maintain the same footprint. More volume could be had by flaring the bottom out, or extending it backwards.
dave
The TL version fo the FonkenWoof is not the best use of the SDX7. I have new (surplus) Eastech drivers for mine, and the SDX7 are going to go into a sealed box (slightly smaller, but heavily damped to make them appear larger).
You can use any driver(s) in a generic fonkenwoof, you are just limited by ~28 litres if you want to maintain the same footprint. More volume could be had by flaring the bottom out, or extending it backwards.
dave
monkeywrenching said:
Where are you in Maryland, Dan? I live to the northeast of Baltimore and am hoping to have my Eastech drivered Fonkenwoofs done by the end of the month. You're welcome to come by and put an ear to them, assuming they go together well.
Strider,
I live in the big metropolis of " Hagerbush" just off of I-81 near the Pa. line. Did you use BB or MDF?
Dave,
I haven't run into anyone who has spec'd them yet. I really only trust the figures that posters here put up. It is only a small amount of work to try plus I am dealing with a small dedicated listening room of 12x13. So not alot of bass is needed.
Dan
I live in the big metropolis of " Hagerbush" just off of I-81 near the Pa. line. Did you use BB or MDF?
Dave,
I haven't run into anyone who has spec'd them yet. I really only trust the figures that posters here put up. It is only a small amount of work to try plus I am dealing with a small dedicated listening room of 12x13. So not alot of bass is needed.
Dan
monkeywrenching said:
Baltic birch. The only place I found it in a full sheet was in Frederick at a place called Hardwoods Inc. Approx $82 per 5x5 sheet; they charged me a couple of bucks to cut it so I could fit it under the cap of my pick up, too.
The Fonkens I built with 3/4" BB ply for the baffle, but 1/2" poplar core birch ply for the remainder of the cabinet. The BB is some pretty impressive stuff.
