Finally this project is back on track.
Collected all the parts on the weekend from CNC shop Project Station, with Euro Birch ply supplied from Brunyzeel.
Luckily, Camry has big boot...!!
I chose 4 circular ports which are similar in volume to a mid sized Altec cab. The size of the ports match a large cork bung (jar lid) I found on Ebay...so I can buy these for tuning if necessary.
Anyone spot an important hole cut-out missing....? Yes, the main driver cut-out on the 25mm MDF baffle...not sure what happened there....bummer. Fancy having to use a hand router...!
This version of my Altec bass horn (called the 820, due to cab height), will sit upright...but it can also sit horizontally.
The drivers are pristine Altec 515G's....I played these in the VOTT A7 the other day, and they sounded way cool.
http://www.diyaudio.com/forums/multi-way/252290-altec-vott-a7-using-cad-cnc-4.html
The top horn will likely be another Yuichi 290Hz model with 2 inch compression driver TBA.
A 'simple' but effective two way, which I'm hoping will sound really good. Will have active xover for bass, and passive second order for top horn.
Check out my 1/3 model of a CNC'd 10mm cardboard version.
Andrew
Collected all the parts on the weekend from CNC shop Project Station, with Euro Birch ply supplied from Brunyzeel.
Luckily, Camry has big boot...!!
I chose 4 circular ports which are similar in volume to a mid sized Altec cab. The size of the ports match a large cork bung (jar lid) I found on Ebay...so I can buy these for tuning if necessary.
Anyone spot an important hole cut-out missing....? Yes, the main driver cut-out on the 25mm MDF baffle...not sure what happened there....bummer. Fancy having to use a hand router...!
This version of my Altec bass horn (called the 820, due to cab height), will sit upright...but it can also sit horizontally.
The drivers are pristine Altec 515G's....I played these in the VOTT A7 the other day, and they sounded way cool.
http://www.diyaudio.com/forums/multi-way/252290-altec-vott-a7-using-cad-cnc-4.html
The top horn will likely be another Yuichi 290Hz model with 2 inch compression driver TBA.
A 'simple' but effective two way, which I'm hoping will sound really good. Will have active xover for bass, and passive second order for top horn.
Check out my 1/3 model of a CNC'd 10mm cardboard version.
Andrew
Attachments
Some more pics of an initial dry run...got to do some minor adjustments on the rear supports.
I think the size of this cab is quite room friendly...820mm tall (or wide if lying down), around 700mm deep/wide.
Pretty heavy too...perhaps in the order of 70Kgs.
I think the size of this cab is quite room friendly...820mm tall (or wide if lying down), around 700mm deep/wide.
Pretty heavy too...perhaps in the order of 70Kgs.
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On the tools today.
Needed to create a very sharp angle for the front horn piecs. My table saw only goes to 45 degrees...needed to use electric plane.
Cut out baffle 'hole'.
Glued in all the brace supports.
Check out pic of my 'workshop.'
Needed to create a very sharp angle for the front horn piecs. My table saw only goes to 45 degrees...needed to use electric plane.
Cut out baffle 'hole'.
Glued in all the brace supports.
Check out pic of my 'workshop.'
Attachments
Finished the bulk of the sanding, and have the speakers in room for testing.
Initial impression, very good indeed. Good mix of punch and bass depth.
Active xover at 400Hz with no EQ. Will do some tests soon.
The Azura 340Hz and JBL 2445 there for testing only until the new Yuichi's get built.
Initial impression, very good indeed. Good mix of punch and bass depth.
Active xover at 400Hz with no EQ. Will do some tests soon.
The Azura 340Hz and JBL 2445 there for testing only until the new Yuichi's get built.
Attachments
I've assessed this against the VOTT A5/7, and it has better in-room behaviour. The response in bass depth is good, due to adjustable/tunable porting. To have a large horn plus a large back area, you really need to go much larger, eg Altec 817....but this is like putting a PA system in your lounge room...fun, but livable?
See full build on Stereonet.
Pics New Mid Bass horn using CNC, Altec, fun.... - DIY Audio Projects - StereoNET altec bass horn
If you're still not convinced, why not consider one of my VOTT A5/7's...also available in CAD/CNC, plans or kit. Likely to be the most advanced build in the world.
See full build on Stereonet.
Pics New Mid Bass horn using CNC, Altec, fun.... - DIY Audio Projects - StereoNET altec bass horn
If you're still not convinced, why not consider one of my VOTT A5/7's...also available in CAD/CNC, plans or kit. Likely to be the most advanced build in the world.
Attachments
Hi Atilsely. Great horn you have made there. I would like to make a similar hor, but can not find out to use hornresp. will you share you drawings? are you going to meassure the frequence responce.Can other woofers be used in the same horn?
Hylle, the sim work was done for my my Martin Sneddon, the onwer/propprieter of Azura Horns. He did this as I was currently using his large 340Hz horn...and he was helpful in getting a good bass unit to suit.
See also attached pic of the sim, plus a pic of the CNC cutting plan for part of the unit. You see a lot of work has gone into it. I need to make one small tweak to the curve, to provide a closer fit. As is, I used a small strip of beading inside the horn edges to tidy this up.
The design would allow similar 15 inch drivers with low qts. Consider the Bob Crites 15 inch woofer (Eminence modified), B&C etc.
See also attached pic of the sim, plus a pic of the CNC cutting plan for part of the unit. You see a lot of work has gone into it. I need to make one small tweak to the curve, to provide a closer fit. As is, I used a small strip of beading inside the horn edges to tidy this up.
The design would allow similar 15 inch drivers with low qts. Consider the Bob Crites 15 inch woofer (Eminence modified), B&C etc.
Attachments
Hi Atisley
beautyful work. Personally however, i never liked the mix of round with square horns. Aesthetically it simply does not please me.
there were some frenche guys which tried to go commercial, but its for some years i have not seen anything from them anymore. I guess they did not have commercial success.
beautyful work. Personally however, i never liked the mix of round with square horns. Aesthetically it simply does not please me.
there were some frenche guys which tried to go commercial, but its for some years i have not seen anything from them anymore. I guess they did not have commercial success.
Aesthetics for me include knowing that technically it's OK going rectangular, esp down lower. WRT aesthetics with other people some of us probably have no hope anyway 😀.
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