135hz Semented Midbass Horn Build

[---k---]

Cool. Wish I could hear them.

[Millstonemike]

Today, the International Union for the Conservation of Nature (IUCN) downgraded Liriodendron tulipifera (yellow poplar) from endangered to vulnerable ...

[scottvalentin]

Interesting to me that you weren't able to achieve similar results with the active setup. What is the difference do you think?

[kenny_k]

Maybe we need more horns.

[JavadS]

Interesting to me that you weren't able to achieve similar results with the active setup. What is the difference do you think?

Hey Scott I wouldn't say "wasn't able". I can easily switch to active and I have all the hardware to do it (minidsp DA8 and 6 Adcom amps) and I may mess with it more but this passive setup sounds so smooth and sweet I'm tempted to just leave it.

I love active and I've built a number of active speakers this past year, but one thing I've noticed with active is what I'll call "over-tweet-the-poop-out-of-it-itis" where you can never leave well enough alone and all of a sudden you find yourself obsessed at 3am trying to smooth out that .5db dip at 1.13kHz, that feeling like anything is ever done is hard to come by.

With the DA8 I can time align and do FIR so I'll update once I play with that =)

Javad

[JavadS]

Today, the International Union for the Conservation of Nature (IUCN) downgraded Liriodendron tulipifera (yellow poplar) from endangered to vulnerable ...

Haha, love you Mike =)

[JavadS]

I'm curious - what were the HornResp input parameters for your horn?

Brian John Inlow did the design, I still haven't messed with Hornresp too much

[JavadS]

Cool. Wish I could hear them.

You are welcome any time if you're in the San Jose area =)

[Brian Steele]

Brian John Inlow did the design, I still haven't messed with Hornresp too much

Ok, can he perhaps make the input parameters for the design available? I'm curious to see what settings he used.

[JavadS]

Ok, can he perhaps make the input parameters for the design available? I'm curious to see what settings he used.

He's an amazing guy, not sure but hit him up and see what he says, he does sell the plans for a small fee. Google Inlow sound.

[JavadS]

Ok time to fire this project back up!

I've been enjoying these horns for the last year or so but haven't had a subwoofer solution to go with them.

I got a bug to build some subwoofers so here we are! Four 6.5 cubic foot enclosures will house 4 PA460 pro subs, tuning will be in the 25-35hz range. I'll be designing the enclosures for 2 configurations.

1- they will be able to be attached in pair to each other back to back in a dual opposed configuration, this will be how they'll be used with the 135hz horn and Seos24z which will both sit on top, and be crossed over around 115hz to the 135hz horn.

2 - stacked on top of each other with the Seos24 on top, crossed over at 500hz, the PA460 actually plays quite cleanly to 1000hz.

Got all the wood cut on Wed and have a great start by Friday morning.

Total wood is just over 3 sheets of plywood.















More to come!
Javad

[JavadS]

Little update, coming along but 4 6ft cabinets simultaneously is quite the juggling act!

To continue the "rat rod" theme the front baffles will be made from reclaimed pallet wood First I cleaned it all up with a brush and checked for any nails or metal



Then I trimmed and squared the ends



Then ripped them to create two parallel sides





Clamped up gluing





And out of the clamps after an hour



Driver and port layout



Center points for driver cutout and ports drilled, then transferred to the front pallet wood baffle which is doweled in 4 places to accurately locate it





4 subs with baffles doweled and located



All baffle through holes routed out, the 5" ports will attach to the pallet baffle, the sub will mount in the base baffle and be recessed by the pallet baffle



Little trick when routing large holes, leave a few perforations till the end



Sides doweled, glued and clamped

[kenrhodes]

I'm loving this build. Its cool to see huge speakers in a house

[JavadS]

I'm loving this build. Its cool to see huge speakers in a house

Thanks Ken! These will be at least 5.5' tall and will easily hit over 120db at 1 meter on 250 watts =) Javad

[TN Allen]

Javad,

Do the lower notes from the horn have a natural, acoustical sound? I like the looks of your work, very neat and methodical.