Does anyone know what's the specs for the vintage Alnico Foster FE103A. I have a pair coming and just wondering if they would be usable with a 3/4 watt single ended darling amp.
Also, has anyone try them on open baffle with a low frequency helper - something similar to this: http://www.quarter-wave.com/OBs/OB_Design.pdf
I plan to copy this design except running the FE103A without any crossover.
Thanks in advance.
Also, has anyone try them on open baffle with a low frequency helper - something similar to this: http://www.quarter-wave.com/OBs/OB_Design.pdf
I plan to copy this design except running the FE103A without any crossover.
Thanks in advance.
Actual T/S will vary from unit to unit.
Fs from 85 to 150, efficiency from 89-92 dB.
When you get them please post pics. I have had quite a few of these, some need some attention before use.
dave
Fs from 85 to 150, efficiency from 89-92 dB.
When you get them please post pics. I have had quite a few of these, some need some attention before use.
dave
I will post pictures when they got here Dave. By the way, have you ever used two of them in parallel per cabinet - I can use the 6db efficient bump - wonder if that will mess/smear up the wonderful midrange.
Thanks for the link Micha. I will check it out.
Thanks for the link Micha. I will check it out.
If you had them on the same baffle, it will destroy the mids + treble. Not recommended. If you must, bipole or possibly one on the top (though there's an increased risk of damage) will give a semi-omni effect & not cause the same lobing issues you'd otherwise run into.
Try to listen to each of them > Although I'm sold on alnico myself it would be interesting to see if the difference is really there and maybe you'll end up preferring ferrite . Regards, L
I have a pair of Foster 10F3's in small cabinets that go along with a helper woofer. They have had the planet10 treatment and sound very nice.
I also have the Coral equivalent (holey basket) that are running as OB mids in another system. They also have had Dave's TLC sound very good. In fact I chose them over the 10F3's because of the better vocals (my opinion)
If you can find another 10F3 you will be very happy.
I also have the Coral equivalent (holey basket) that are running as OB mids in another system. They also have had Dave's TLC sound very good. In fact I chose them over the 10F3's because of the better vocals (my opinion)
If you can find another 10F3 you will be very happy.
Attachments
"Try to listen to each of them > Although I'm sold on alnico myself it would be interesting to see if the difference is really there and maybe you'll end up preferring ferrite . "
I did - ferrite can't much alnico when it comes to tone - not even close.
I did - ferrite can't much alnico when it comes to tone - not even close.
Try a mono design
A back loaded cornerhorn (like a frugal horn) with a few adaptations could be a very cool way to use the two of these. Alnico forward firing, ferrite upfiring for a little extra output ability in the bass region. I'd say just do a frugel horn design, with a double sized compression chamber you can tune with displacement via bricks or the like.
A back loaded cornerhorn (like a frugal horn) with a few adaptations could be a very cool way to use the two of these. Alnico forward firing, ferrite upfiring for a little extra output ability in the bass region. I'd say just do a frugel horn design, with a double sized compression chamber you can tune with displacement via bricks or the like.
That is a shame they aren't a pair... i have no singles amounst my collection to help you match them up.
Which one has the v=black cone -- that is highly unusual.
dave
Which one has the v=black cone -- that is highly unusual.
dave
That is unique in my experience.
Mail me if you are interested in swapping for a matched pair... your mismatched pair would at least be at home with all the singles i have.
dave
Mail me if you are interested in swapping for a matched pair... your mismatched pair would at least be at home with all the singles i have.
dave
Fe103A - build up basket with epoxy?
Thought I'd use the most recent thread on Foster fe103A's instead of starting another.
Has anyone tried building up the basket/spider of the 103's (any version) with Marine Tex or other "rigid" epoxies?
Basically I'm thinking of doing all the duct seal mods as well as building up the "legs" of the basket to a pair of Foster fe103A's but using rigid epoxy to strengthen and damp the basket. Of course this is a non-removable mod so I thought I'd ask around first.
I don't know if anyone is familiar with Marine Tex but it's a rigid sandable/fillable epoxy for Marine use, will apparently cure underwater though I haven't tried that as don't do much listening under water.
So far the fe103a's are still in their recently acquired chrome fronted Tunnel Reflex boxes, though I have replaced the original speaker wire and done the Modge Podge fix to glue the surround back on to the cone.
(Thanks Planet10 for the how to, I used a smooth nail file to lift the surround and get the brush under)
Thought I'd use the most recent thread on Foster fe103A's instead of starting another.
Has anyone tried building up the basket/spider of the 103's (any version) with Marine Tex or other "rigid" epoxies?
Basically I'm thinking of doing all the duct seal mods as well as building up the "legs" of the basket to a pair of Foster fe103A's but using rigid epoxy to strengthen and damp the basket. Of course this is a non-removable mod so I thought I'd ask around first.
I don't know if anyone is familiar with Marine Tex but it's a rigid sandable/fillable epoxy for Marine use, will apparently cure underwater though I haven't tried that as don't do much listening under water.
So far the fe103a's are still in their recently acquired chrome fronted Tunnel Reflex boxes, though I have replaced the original speaker wire and done the Modge Podge fix to glue the surround back on to the cone.
(Thanks Planet10 for the how to, I used a smooth nail file to lift the surround and get the brush under)
It is released again as anniversary version!
see Madisound .
Interesting.
There is also a dedicated bass reflex enclosure.
So what do you think of this new release?
The curve looks a bit bright, but in practice it might not be hearable (my Lowther PM2C wasn't bright at all in my installation). There is a quite big sag above 2Khz.
By the way, the specs resemble the ACR clone of the 103. (in D.Petoin's database)
see Madisound .
Interesting.
There is also a dedicated bass reflex enclosure.
So what do you think of this new release?
The curve looks a bit bright, but in practice it might not be hearable (my Lowther PM2C wasn't bright at all in my installation). There is a quite big sag above 2Khz.
By the way, the specs resemble the ACR clone of the 103. (in D.Petoin's database)