when the SS15 ( single sheet TH ) thread from JBELL was in the top 3 ongoing topics over here
there was a guy .... what was his name..... Ohhhhh FlipC i guess
he made a dozen of SS15's cabinets!!
and called them Flip's Dozen!
the SS15 was designed for the eminence 3015LF
a driver who was very humble on specs. low power
weak motor and low xmax
but it was light as it is a neodymium driver
people who made 2 or 4 was raving about it
imagine the guy who made a dozen!!
12 cabs with modest power can make some noise 🙂
every doubling of cabinets is +3dB SPL
every doubling of power is +3dB SPL
doubling power and cabinets will do +6dB SPL
you are having a DEJAVU reading this
and next thing that came up in your mind was.....
heck yeah ! i will make a dozen !! why not !! 🤣
there was a guy .... what was his name..... Ohhhhh FlipC i guess
he made a dozen of SS15's cabinets!!
and called them Flip's Dozen!
the SS15 was designed for the eminence 3015LF
a driver who was very humble on specs. low power
weak motor and low xmax
but it was light as it is a neodymium driver
people who made 2 or 4 was raving about it
imagine the guy who made a dozen!!
12 cabs with modest power can make some noise 🙂
every doubling of cabinets is +3dB SPL
every doubling of power is +3dB SPL
doubling power and cabinets will do +6dB SPL
you are having a DEJAVU reading this
and next thing that came up in your mind was.....
heck yeah ! i will make a dozen !! why not !! 🤣
Thanks maxolini. Looks like a viable candidate at $600. Would this be too loud for my living room? Lol
Not if you have sufficient power (preferably class A/B) for +20-30 dB dynamic headroom recordings........
Note that the simulation in #1783 is using 178.89 volts.
That is around 8400watts (not 4kW) at the impedance minima near 3.8 ohms, 8k into a nominal 4 ohm load.
The Dayton HTS 525HE-4 is only rated for 2000w AES426B.
I doubt the coil would withstand 178.89 volts in the Keystone for much more than the time to read this sentence.
Also, it's "Audible over excursion protection system" might be the spider crashing against the "protector".
If the tech drawing is correct, does not seem to be 21mm excursion possible before parts contact.
I'd think around 2000 watts (-6dB) would be safe, but would be interested in actual results.
Art
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What watt at what frequency and impedance?
The driver is 4, not 8 ohms, and 4kW is double it's 2kW rating, and since it's 4 ohms, 179 volts is ~8kW, unless the impedance minima is above 4 ohms.
The ice fishing house was put in by accident, it's located in Minnesota.
Art
Good catch. From the couple videos of this driver's excrusion online, it certainly looks more like 15mm. Also, it looks like the group delay spike comes in much earlier at 100hz limiting usable bandwidth. I do have a some 12s that might work. Did you ever try reverse mounting one of the 12s? I read that this helps keep cone travel linear at xmax, reducing distortion. I don't understand this though.
Yes, if they are functioning, they will work.
Their lower excursion output potential will be around -4 dB less than a B&C 18SW115 in the low end.
With two cabinets, they should put out around +2 dB more than one cabinet with a 18SW115.
The Keystone throat depth requires reverse mounting speakers. I have tried a pair of LAB 12 drivers in it, never a single 12".
The direction the cone faces should have no effect on distortion.
Reversing one driver of a pair (not possible in the Keystone) may reduce even order distortion.
The more linear the driver, the less effect reversing one of a pair has.
Excited to build my first pair of Keystone Subs. I modeled the speaker in SketchUp with all the parts. I ended up with a slightly different "I - Horn Brace" and "G - Horn Top" shapes. If anyone has time to review the model and double check my work, that would be hugely appreciated. Planning to flatten the shapes and arrange them on 4x8 "sheets" for a CNC cut this week.
I'm considering adding 1/8" deep grooves in "A - Sides" where "F", "G", "H" go and widening those by 1/4" to slot into the grooves. Any suggestions / concerns before making these modifications?
Keystone SketchUp Link
I'm considering adding 1/8" deep grooves in "A - Sides" where "F", "G", "H" go and widening those by 1/4" to slot into the grooves. Any suggestions / concerns before making these modifications?
Keystone SketchUp Link
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The dado slots shouldn't be a concern, and should make assembly easier.
The usual concern is a snug fit, but not too tight- definitely try a dry fit before opening the glue.
Not when you can see my face:
That was 18 years ago, hasn't improved with age.
That said, there is no accounting for taste...