Nice looking design. I will echo the sentiments of those before and say CNC would be an awful waste. What I call "Bendy plywood" would work a treat, otherwise, if you are a glutton for punishment you would cut kerfs in regular sheet plywood to achieve the bending properties / curve required. Its not difficult but is time consuming. The tops are easy enough to shape.
The only other concern would be calculating / measuring the volume of enclosure and even that would not be too much trouble getting an estimate of.
I did something around two years ago, a stand mount two way speaker, roughly the shape of an elongated guitar body and used kerfing.
The only other concern would be calculating / measuring the volume of enclosure and even that would not be too much trouble getting an estimate of.
I did something around two years ago, a stand mount two way speaker, roughly the shape of an elongated guitar body and used kerfing.
Been researching materials and came across an interesting product.
1mm solid wood backing
7 layer ply (10mm)
4mm solid wood 'veneer'
They are engineered solid wood floor boards. I plan on glueing them together onto an 3mm mdf backing to ensure they lie flat an them power sand the finish off.
I was looking at them for building a pair of the Pensils, but have decided to do a test mockup using the Alpair 7.3 and one of Planet 10's small bass reflex cabinets.
As they were surplus to the flooring shop and a little scuffy I got them for £10 a board. Two should be enough to make a pair.
I also plan on putting round lippings on the corners......a sketch up picture to follow.
Images below:
1mm solid wood backing
7 layer ply (10mm)
4mm solid wood 'veneer'
They are engineered solid wood floor boards. I plan on glueing them together onto an 3mm mdf backing to ensure they lie flat an them power sand the finish off.
I was looking at them for building a pair of the Pensils, but have decided to do a test mockup using the Alpair 7.3 and one of Planet 10's small bass reflex cabinets.
As they were surplus to the flooring shop and a little scuffy I got them for £10 a board. Two should be enough to make a pair.
I also plan on putting round lippings on the corners......a sketch up picture to follow.
Images below:
Attachments
Sketchup image
An externally hosted image should be here but it was not working when we last tested it.
Having finished the above cabinet, its time to start thinking about the next.
Has anyone seem an Alpair in a cabinet like this.
It would be a challenging project....
Have the 7.3 sat in a turned coopered bowl, on top of 2xlarge subs, Peerles XLS 10" for example. With a curved plywood skin, similar to the B&W 800.
Thoughts?
Has anyone seem an Alpair in a cabinet like this.
It would be a challenging project....
Have the 7.3 sat in a turned coopered bowl, on top of 2xlarge subs, Peerles XLS 10" for example. With a curved plywood skin, similar to the B&W 800.
Thoughts?
Bernie is having me design a 20 sided tapered polygonal cabinet that is essentially a steam-punk version of the B&W mid pod.
dave
dave
Only a scan of Bernie's sketch.
It is going to be a dMar-Ken7.3 variation, modeling is done.
dave
Attachments
that would be awfully tricky to try and turn...ill get drawing tomorrow and see what i can come up with.
It is not turned. It is assembled from flat panels.
And yes, it is a challenging build,
dave
I have wanted to try my hand a coopering, if I make One similar it will be turned on a lathe for a round finish. Those ports are the only real dilemma I can see. Do you know if the Alpair performs well in a sealed box?
This is how I think best to make my enclosures.
Layer up concentric teardrop 'rings' of plywood, and turn as a whole on a lathe. After route whole and recess for driver.
Like this concrete pen, but then rounded smooth.
Layer up concentric teardrop 'rings' of plywood, and turn as a whole on a lathe. After route whole and recess for driver.
Like this concrete pen, but then rounded smooth.
Anyone have any recommendations for a woofer/sub to use in a FAST configuration.
Alpair 7.3 in a turned B&W like sealed enclosure. And the woofer in a big curbed cabinet.
A larger 8"/10"/12" woofer to handle the lower bass.
Any great drivers spring to mind, available to purchase in the UK.
Have my eye on the Peerless XLS 10 (£70ea)
Alpair 7.3 in a turned B&W like sealed enclosure. And the woofer in a big curbed cabinet.
A larger 8"/10"/12" woofer to handle the lower bass.
Any great drivers spring to mind, available to purchase in the UK.
Have my eye on the Peerless XLS 10 (£70ea)
I'm looking at the Peerless 835026. Models extremely well. Being aluminium, it will match the gray Alpair.
Bob
Bob
hey nice work! I like where this is going. Ever thought about making an RP of the cabinet shape and taking a mould off it? Carbonology in the UK do a simple kit for this, then u cd produce a beautiful carbon fibre enclosure for the Alpair.
The peerless is available @ Falcon and Europe Audio I think - but what is the power handling on these? The travel doesnt look more than the Hivi M8N's.
The peerless is available @ Falcon and Europe Audio I think - but what is the power handling on these? The travel doesnt look more than the Hivi M8N's.
Here is the link to the eBay seller
2X Peerless XLS10 Subwoofer P830452 Loudspeaker Speaker | eBay
and the specs
Specifications
Nominal Impedance (Ohms)
Zd
4
Min Impedance
Zmin
5.2
DC Resistance (Ohms)
Re
3.6
Voice Coil Inductance (mH)
Le
0.99
Resonant Frequency (Hz)
Fs
22
Mechanical Q Factor
Qms
3.86
Electrical Q Factor
Qes
0.24
Total Q
Qts
0.23
Moving Mass (g)
Mms
136.6
Suspension Compliance (mm/N)
Cms
390um/M
Effective Cone Diameter (cm)
D
21.1
Effective Piston are (cm2)
Sd
349.7
Equivalent Volume (Ltrs)
Vas
66.90
Force Factor
Bl
16.75
Reference Voltage Sensitivity
dB
86.6
Weight of Magnet (kg)
2.42
2X Peerless XLS10 Subwoofer P830452 Loudspeaker Speaker | eBay
and the specs
Specifications
Nominal Impedance (Ohms)
Zd
4
Min Impedance
Zmin
5.2
DC Resistance (Ohms)
Re
3.6
Voice Coil Inductance (mH)
Le
0.99
Resonant Frequency (Hz)
Fs
22
Mechanical Q Factor
Qms
3.86
Electrical Q Factor
Qes
0.24
Total Q
Qts
0.23
Moving Mass (g)
Mms
136.6
Suspension Compliance (mm/N)
Cms
390um/M
Effective Cone Diameter (cm)
D
21.1
Effective Piston are (cm2)
Sd
349.7
Equivalent Volume (Ltrs)
Vas
66.90
Force Factor
Bl
16.75
Reference Voltage Sensitivity
dB
86.6
Weight of Magnet (kg)
2.42
Here is a quick mockup.
An externally hosted image should be here but it was not working when we last tested it.
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