Fane 12-250TC Retro Speaker.

Dedicated to those large boxes at one end of the room
Fozzibaermopped
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#331 Re: Fane 12-250TC Retro Speaker.

Post by Fozzibaermopped »

I have tried to simulate the Fane with a simulation programme (closed cabinet). The results are not so good (my skills are very limited). But I could see that increasing the volume above 80 litres does not bring much improvement for more deep frequencies. Therefore, I will also build the enclosure in the 80 litre range.
However, I would like to equip the bottom with an exchangeable plate. This way I can do different experiments (closed, ventilated or bass-reflex).
I have read in the last reports that you have exchanged the feet for others. What was the reason? Did the longer feet have a negative influence on the sound? What is the length of the new feet?
Cressy Snr
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#332 Re: Fane 12-250TC Retro Speaker.

Post by Cressy Snr »

I was just experimenting with different feet. The original feet ended up back on.
Yes, 80 litres was the best compromise I found. In terms of bass, as you will be aware, deep bass, reasonable box size and high efficiency do not go together. If you want ultra-deep frequencies then an active sub will be needed.
Easy listening: high fidelity, low anxiety.
chris661
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#333 Re: Fane 12-250TC Retro Speaker.

Post by chris661 »

It's also worth noting that the typical UK house has brick walls, which means we can get quite a lot of room gain.

My current speakers, for example, are -3dB at 50Hz according to the simulations. In practice, my (very helpful) room results in a response that gets to +15dB (over nominal level) at 40Hz. The measured -3dB point at the listening position is just below 10Hz.


It's entirely possible that the Fanes were enjoying similar benefits in terms of LF boost, but it'd need a measurement mic to check.


Chris
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#334 Re: Fane 12-250TC Retro Speaker.

Post by Fozzibaermopped »

I will add another 10 litres on top. So the enclosure will have 90 litres. So I have the possibility to reduce the enclosure volume by inserting polystyrene cubes if necessary.
And the speaker gets a little higher.

I will revise the drawing accordingly. When it is finished, I will show it to you. Wood has already been ordered.

It will be my winter project.
Fozzibaermopped
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#335 Re: Fane 12-250TC Retro Speaker.

Post by Fozzibaermopped »

I would like to report further. Here you can see my first design for the 90L enclosure:
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The openings for ventilation in the floor remain closed for the time being. I want to hear the speakers closed first.
The first load of wood has already arrived:
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I start with the partition wall inside:
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Shit... The circle cutter is blunt:
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The wood burns during sawing:
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Sharpened the circle cutter for an hour with the diamond file. Now it cuts well again and produces a lot of Biscuits:
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I'm done for the day:
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I'll keep you updated.
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IslandPink
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#336 Re: Fane 12-250TC Retro Speaker.

Post by IslandPink »

Good effort. I've been there a number of times where I had the time and focus to get things done, then the tools failed me.
"Once you find out ... the Circumstances ; then you can go out"
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Ray P
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#337 Re: Fane 12-250TC Retro Speaker.

Post by Ray P »

Fozzibaermopped wrote: Sat Dec 03, 2022 2:48 pm I would like to report further.
Good work.
Sorry, I couldn't resist!
Fozzibaermopped
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#338 Re: Fane 12-250TC Retro Speaker.

Post by Fozzibaermopped »

Things are moving forward. A lot of work, little free time. Therefore only slowly.
The enclosures are glued together:
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Unfortunately, the supplier of the boards did not work cleanly. The side parts are 1mm too short:
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But I will compensate for that later with the router.
Then the cut-outs for the full range drivers:
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Soon it will continue.
Cressy Snr
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#339 Re: Fane 12-250TC Retro Speaker.

Post by Cressy Snr »

Great work!
Easy listening: high fidelity, low anxiety.
Fozzibaermopped
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#340 Re: Fane 12-250TC Retro Speaker.

Post by Fozzibaermopped »

With the current prices for wood, it is really hard to get material at reasonable prices. That's why I made the mouldings for the corners myself.
I installed the router in the work table and clamped on guides made from wood scraps:
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Then carefully push the rectangular strips through:
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Fozzibaermopped
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#341 Re: Fane 12-250TC Retro Speaker.

Post by Fozzibaermopped »

And it goes on...
The strips were glued:
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This is what the enclosures with the corners look like:

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The edges will be rounded off later...
Fozzibaermopped
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#342 Re: Fane 12-250TC Retro Speaker.

Post by Fozzibaermopped »

As mentioned above, the panels were not sawn to 100% the same length, so there was an overhang when gluing them together. With the corner strips for this, the surface must be made flat again before gluing on the lids. To do this, I used my self-made dressing rail for the router and a few scraps of wood as a guide:
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Fozzibaermopped
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#343 Re: Fane 12-250TC Retro Speaker.

Post by Fozzibaermopped »

Since the thick tops/bottoms are to have beautiful milled profiles on the edges, these have to be glued in advance. I use 10 mm thick beech strips for this:
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The protrusion is then made flat with the router and the end strip is glued on:

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IslandPink
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#344 Re: Fane 12-250TC Retro Speaker.

Post by IslandPink »

The pictures are very educational !
"Once you find out ... the Circumstances ; then you can go out"
vinylspinner
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#345 Re: Fane 12-250TC Retro Speaker.

Post by vinylspinner »

Nice work, those little Makita palm routers are brilliant, very versatile and every workshop should have one.
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