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Interest Check - Custom Fane 15" Full-Range
Interest Check - Custom Fane 15" Full-Range
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View Poll Results: Which version of the 15" full-range unit would you prefer?
A - Upgrade the magnet only 9 37.50%
B - Upgrade the magnet, swap to cast aluminium basket 8 33.33%
C - Bigger magnet, aluminium basket, bigger voice coil 6 25.00%
D - None - the original is fine. 1 4.17%
Voters: 24. You may not vote on this poll

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Old 7th September 2018, 12:00 PM   #1
chris661 is online now chris661  United Kingdom
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Default Interest Check - Custom Fane 15" Full-Range

Hi all,

I'm running an interest check first of all.

The Fane 15" full-range driver looks pretty good in a lot of ways, but the T/S parameters make it difficult to work with unless you're willing to put up with a very large cabinet - Qts = 0.7 and Vas is 203L.

I'm thinking of organising a group buy for some upgraded units, and wanted to check interest levels.

I can see a few options here:

A - Same moving parts, just add more magnet
B - More magnet, cast aluminium frame
C - More magnet, cast frame, bigger voice coil aiming for more cone excursion and power handling.
D - Don't bother, the original is fine

I'm not looking for solid commitment or money at this point, but a rough idea of how many you might want to order would be good.

The T/S parameters I'm aiming for are simply to increase BL and drop Qes. That'd mean they'll be much happier in smaller cabinets, and also gain some efficiency.

Here's a quick sim of what we get if we go from the current BL=10.9 to BL=18.9:

Click the image to open in full size.

This is in a 35L cabinet tuned to 73Hz. I know which I'd prefer.

With the increased BL, you could also go for a larger cabinet in the 100L range, which would give a response that slopes down towards the bass (probably matching room gain curves quite well) with LF extension into the 30Hz range before it rolls off.

So, I can see the improved version being useful for a few different markets:
- High-efficiency home HiFi - add a small valve amp and you're done.
- Professional Audio - stage monitors, main PA, etc.
- High-power home theatre surrounds.

A quick summary of the upgraded product:

- 15" Full-range unit
- Powerful motor means it'll be happy in compact enclosures
- Exceptionally high efficiency - 102dB @ 2.83v in 2pi.
- No need for a crossover
- Possible option for cast aluminium basket
- Uses existing recone materials
- Possible to get very deep bass, but larger enclosures would be needed.


I think that's everything. I've (hopefully) set up a poll so you can tell me what you think of all this.

Cheers all,
Chris
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Old 7th September 2018, 02:06 PM   #2
ErnieM is online now ErnieM  United States
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More magnet(maybe neo), copper cap, cast frame, etc.
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Old 7th September 2018, 07:15 PM   #3
KaffiMann is offline KaffiMann  Norway
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Another vote for Ernie's suggestion.
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Old 7th September 2018, 07:36 PM   #4
freddi is offline freddi  United States
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Interest Check - Custom Fane 15" Full-Range
a good steel basket with no sharp edges is fine with me. ((Eminence Kappa12a, K43 type) I've dropped steel basket speakers with little damage to the basket and cast P-audio basket, breaking the basket at the rim - More motor please in the variant to get qts into the vented box (and Karlson) region. Fane don't seem to be directly available in the US.

Last edited by freddi; 7th September 2018 at 07:39 PM.
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Old 7th September 2018, 08:26 PM   #5
SubSoniks is online now SubSoniks  Wales
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Upgrade of basket and magnet, cast basket should reduce magnetic losses and allow for closer gap tolerence, may also reduce some resonance of the assembly., revisit coil assembly if it doesn't compromise existing sound.
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Old 8th September 2018, 01:14 PM   #6
Bfpca is offline Bfpca  Canada
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Interest Check - Custom Fane 15" Full-Range
More magnet for sure. I’d also like a cast basket but I fear that would be very expensive unless there was large order. A new basket would also have different aerodynamics which may change the response.
The issue I see with going all out on upgrades is that we would really be creating a new driver entirely and who knows what that would sound like.
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Old 8th September 2018, 04:01 PM   #7
Scottmoose is offline Scottmoose  United Kingdom
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As a bland observation, simply increasing the motor power of the existing unit via a larger magnet is also likely to change the response over a wider region than just below the mass corner, so the general presentation / response / 'sound' will probably change anyway.
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Last edited by Scottmoose; 8th September 2018 at 04:07 PM.
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Old 9th September 2018, 12:14 PM   #8
KaffiMann is offline KaffiMann  Norway
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Scott: I think that is what we're counting on.

Chris: here's a neo ring that might work? Will have to check the measurements.
40mm O.D x 25mm I.D x 5mm thick Neodymium Magnet - 9.7kg Pull | first4magnets.com
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Old 9th September 2018, 12:55 PM   #9
hazard500 is offline hazard500  Australia
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How would you affix this magnet?

I dont have any Fane 15TCs but I have just bought a pair of the 12TC model (havent put them I to a baffle yet) so will be following g this thread with interest.
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Old 9th September 2018, 01:50 PM   #10
Scottmoose is offline Scottmoose  United Kingdom
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Quote:
Originally Posted by KaffiMann View Post
Scott: I think that is what we're counting on.
Really? I stand corrected, I thought the only major point being made in the original post was behaviour below the mass corner [i.e. increasing EM damping to allow more practical enclosure sizes]; I didn't see any reference to how this might affect behaviour across the rest of the range.
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