Folded 1x15 Horn

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14 years 8 months ago #6474 by deadbeat
Replied by deadbeat on topic Folded 1x15 Horn
PM me and I'll send them again, they're .tcw s (TurboCAD) but I can save them as .dxf or .pdf or whatever you use.

Beranek\'s law
\'bits of ply round a driver\'

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14 years 3 months ago #8442 by jake_fielder
Replied by jake_fielder on topic Folded 1x15 Horn
Saul came round mine today, and brought a measurment mic and RTA software.
We measured a pair of simonr (ish) kick bins, the main aim was to see how the kick bins played compared to simulation. Im sure Saul can post the software and mic details later.

Important to bear in mind; i had a multimeter across the inputs to the cabs reading 2.8v (or 2v for the 4r) on the sweeps, but the mic wasnt calibrated so the SPL appears to be a tad high. But the offset should be consistant, so you can see the flatness of responce and the gain with 2 bins.

These are slightly different to simonr's design.

Heres some pics;
1 kick bin 1 watt, not calibrated remember

Not a bad plot for 1 kick bin, considering its supposed to be used from 80 - 180Hz



2 kicks 1 watt, not cal'd remember

2 gets alot smoother, even down to 70 now, but i think excursion at high powers still limits them to 80Hz.

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14 years 3 months ago #8449 by bee

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14 years 3 months ago #8451 by saul
Replied by saul on topic Folded 1x15 Horn
as jake said we did try several mic positions - i agree that a kick cab would often be raised from the ground, so we did try one measurement with the mic raised right up , but the only real change was below the 80hz anyway - or the change would have been in SPL, but we werent interested in SPL.

will find group delay graphs

we also tried a measurement with the mic as close to the ground as possible, but not touching.

forum.speakerplans.com/rta-measu ... 37688.html

please ignore the pic

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14 years 3 months ago #8455 by giveortake
Replied by giveortake on topic Folded 1x15 Horn
I always liked this design, very happy to see it built.The plots are promising, I would love to hear them someday.
Anyone is in contact with Simonr? His 1x18 design looked great too.

What is your philosophy of life or your creed ?
\"Have a good time, ALL THE TIME\"

Wisdom is better than silver and gold !

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14 years 3 months ago #8457 by jake_fielder
Replied by jake_fielder on topic Folded 1x15 Horn
They have been built for ages, my friends had 2, and have completed a second pair a couple of weeks ago. im glad to have measured them actually and they are pretty similar to the plots so im happy, it would be nice to get an efficiency reading on them but i already know they are loud!!

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14 years 3 months ago #8468 by heathrow_b_line
Replied by heathrow_b_line on topic Folded 1x15 Horn
can some kind sould send me the plan as a dxf?

many thanks

Produce a killer sound. Take no prisoners.

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14 years 3 months ago #8469 by jake_fielder
Replied by jake_fielder on topic Folded 1x15 Horn
I have changed computers since deadbeat sent it to me, and i never managed to open it while i had it, i think that deadbeat & simonr are the only people with the plans...

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14 years 3 months ago #8476 by cyklist
Replied by cyklist on topic Folded 1x15 Horn
can someone PLEASE post or PM me the dimensions of this cab as i would really like to build 4 for on top my wsx's,
they crossover to my tops perfectly, well done on the design of these boxes.
:thumbup:

I aint gettin on no plane

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14 years 3 months ago #8489 by jake_fielder
Replied by jake_fielder on topic Folded 1x15 Horn
Its not gonna happen! No one has them who posts on here now!

The ones i measured arent the exact plans anyway, just an aproximation! (and my mate lost the plans for them)

Simply work them out like i did, or when i come to do another 2/4 i'll have to measure mine up to build more and i'll post it then

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