Altec Madrids as bass bins?

[hatrack71]

I have a chance to acquire the mini Valencia looking Madrid cabinets (empty) with the lattice grills. My question: I have a set of N500 crossovers and 511b/802 drivers. Would a 416 woofer work well in these cabinets as a bass bin crossed at 500Hz. There is a small square cut out above the 15" woofer cut out in the cab- so it wouldn't be a sealed enclosure. These would look like mini A-5s and would be very much eye candy. But would they be ear candy? Inside dimensions of the cab is 18 3/4" x 20 1/4" x 15 1/2". Any help appreciated. Thanks in advance

[hatrack71]

Nobody has ever tried to make a mini A5 out of these cabs?

[hatrack71]

Here are some pics of what I am dealing with. I've tried using this forum for responses but hardly ever get replies. I guess I'll try one more time.

[hatrack71]

Internal volume is 3.4058 cubic feet or 5885.2 cubic inches or 96.44 liters. What are the acceptable volume box parameters( range) for a 416 woofer?

[Earl K]

- Altecs' 416 Woofers work best in enclosures that are 7.5 to 10 cu ft .

- Download WinIsd Pro ( free "tuning" software for predicting box/speaker alignments ) .
- Get the online 416-8(B or C) TS parameters ( using google ) , enter those parameters into the program & tune away ( Try 9 cu ft tuned to 30 hz ).

- Your Madrids are nice looking speakers . I suggest you put some le14a ( JBL ) woofers into them ( obtained used from eBay & refoamed by the reconer of your choice ) . The 811b horn might fit above that woofer in the cabinet .
- The le14a works very nicely in 2.5 to 3.5 cu ft enclosures tuned to 31 hz .

<> cheers

[Dingusboy]

The JBL 2226 would be another candidate for these boxes. they do very well in a ported box of this size.

I had 2226's in a similar box and it was great with a good horn above it.

The 2226 can handle a high crossover point (Wayne uses 1600 on his 4pi design) so intergrating with a 1" compression driver should work well.

They are beautiful cabinets.

[Sam Cogley]

That rectangle looks like it was made for a 3000 series tweeter.

[MartinV56]

The altec madrid 872A system use the 420y woofer




The tweeter is the 30685 CTS tweeter. Good woofer great midrange, the bass is mediocre about 50 Hz in the cab

[JoMoCo]

They would be great candidates for econo waves.....

Seal them up, use a JBL 2225, 2226, 2227 or other driver of choice and the smaller 6"x6" PTB99HF-1 wave guide (364914-001) in the existing port hole......

It is a long read but pregnant with good info including crossover build info......

http://www.audiokarma.org/forums/sho...ight=364914%2A

Enjoy your music.....

[hatrack71]

I didn't even think about JBL woofers. I do have a spare pair of 2420s mounted on H91s with LX16 crossovers. How well would that work with 2225s or 2226s in those cabs?