DIY multicell horn

[joejoe723]

Hi Vott,

Your idea is very good, hardwood used in the part of throat and thin plywood used in the part of cells. I think this is a funny experiment and i want to try. I haven't an original Altec 1505 so i cannot measure the actual dimension -_-.


I heard that concrete speaker cabinet is very common in mainland China. They also like to built woofer system in the ground/underground and all the material are concrete.

[Datubie]

Hey Mirro,

You're in luck (Unless you're actually the seller); there is a single Dukane 325 horn on ebay now.
Dukane (Vitavox horn)

[Mirrophonic Sound System]

Thank's Datubie, The DuKane is a fairly neutral sounding horn
that will do 300hz easily and is built like a brick *********

[HiFiPlayer]

A VERY GOOD CHANCE FOR YOU!
YOUR DREAM WILL COME TRUE!!

A very nice single 1505B multicells horn up on ebay auction( no reserve). Good chance for your 1505B multicells horn replica plan.

To ful fill your woodworkings ability now.

[Mirrophonic Sound System]

Larry

I should bid on it but I just know the bidding is going to go
ballistic - in which case I'll sell mine because it's more fun
to build your own.

[thevott]

I saw a whole cluster of Dukane multicells pulled from a university basketball arena about 10 years ago. They sold---along with 4 dual-15" bass horns---very low at auction and, like a fool, I wasn't there.

By the way, just for the record my 815s bass horns are currently loaded with my end cuts: two 418's from an Ampeg fliptop, one 515 (A) reconed to a 515-16G and one hornless 602 that (remarkably) made it through high school and college. The sound of these horns is solid Altec goodness regardless of the mismatches. I'd would like to get a hold of a full set of the new model 164-8LF Iconic Manufacturing woofers. Sounds like they will really flourish in the 815s!!

MP

[thevott]

Mirrophonic Sound System,
The avatar is in fact a fantasy system though I have have every intention to build the plywood beast. I do have the 815s, however, whose cutoff is at about 75 Hz according to Altec literature. My 815 horns are modified/opened up into psudo-Voice of the Theatre bass reflex enclosures. They sound very good and rolloff around 40 Hz with a 'nice' bump at 45 Hz.
Don't ask what drivers are in there but they are all Altec!

MP

[joejoe723]

Hi Mirrophonic Sound System

You are really lucky, in the ebay, that Dukane horn are 5A325, 10 cells and 220Hz cut-off.

[joejoe723]

Hi Vott,

Could you tell me the 1505 horn dimension of the cell mouth?(or the single cell dimension). I want to calculate the actual cut-off frequency of Altec multicell horns.

If you know the size of other Altec multicell horns mouth. Please let me know.

Thanks

[Charles Chance]

All are inside measurements
311-60~= 20 1/2 x 11 1/16h

311-90~= 31w x 12 1/8h

511~= 23 7/8w x 8 15/16h

811~= 18h x 6 3/4h

1005~= 32 1/2w at top and bottom
34w at middle
12 11/16h
Each cell of the 1005 measures 6 5/16w x 6 1/4h