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Dual Othorn / Dual modified F215AN Build Log Summary
Dual Othorn / Dual modified F215AN Build Log Summary
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Old 7th July 2014, 06:31 PM   #21
Alethia123 is offline Alethia123
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If I wanted to splurge, could I just select the best B&C drivers I can find and stick them in there? (Of course the ones with the proper parameter / specifications). Would overdoing it on driver quality actually hurt in this instance because the design was built around more inexpensive ones? Please dont take that as snooty, but if I build one of those things I want to go all out considering the woodwork, and that it will need its own rack of amps / dsp. :-).....oh lord here we go again
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Old 7th July 2014, 07:25 PM   #22
Josh Ricci is offline Josh Ricci  United States
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I see you got them done and some mains built as well. Awesome. I'm glad you like them. I think they sound great and that PL380 should be a solid match. In most places that aren't huge you will see a bit of lift below 35Hz that will help flatten the response down to 25Hz before the highpass. Most people in a club or venue have never heard the 25-35Hz range represented without loads of distortion and with equal strength as the rest of the bass range. Strong fundamentals in that range are rare in music but when they do show up the difference is huge.
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Old 7th July 2014, 07:44 PM   #23
Alethia123 is offline Alethia123
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You hit the nail on the head right there Josh. With those giant reflex boxes you can hear the drivers being over driven and hear the sound begin to falter when they go that low. That is not the case with the othorn. It just effortlessly sweeps down the lowest points of the audible spectrum. People just get this huge smile on their faces. To me, it serves as a bold and truly authentic reminder of how important quality is. Josh, the amount smiles and dancing and love you sparked by designing these things you may never truly know (its a wholllleee lot). Two of them just turned an entire huge open field into what sounded like a home theatre music cathedral. Ive heard tons of high end reflex boxes and horns but....nothing like this. Bass heaven. Thank you man
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Old 7th July 2014, 08:28 PM   #24
weltersys is offline weltersys  United States
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Quote:
Originally Posted by Alethia123 View Post
I was really interested in doing a diy synergy horn, but the task seemed a little daunting. Did they ever release a kit on any of these forums?
DSL has not released kits for Paraline or Synergy.

I am selling my Paraline small format line array for around the cost of the drivers, and could include templates so you could make more if you wanted, though the system remains coherent in the hot dry climate of New Mexico (the worst case for high frequency absorption) in excess of 400 feet.

Complete Line Array System for Sale

The waveguides increase the low frequency output by around 3 dB, and lower the directivity control an octave.

Nice job on your Othhorns!

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File Type: jpg WS Mains w:waveguides.jpg (25.4 KB, 195 views)
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Old 7th July 2014, 08:31 PM   #25
Alethia123 is offline Alethia123
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Thank you art!!!! I want to hear a keystone soon. Those things look killer
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Old 7th July 2014, 08:35 PM   #26
weltersys is offline weltersys  United States
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Well, your Othorns are slightly more killer ;^).
Anway, you are only 700 miles away, just an afternoon's drive for a Texan, come on over and take a listen!
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Old 7th July 2014, 08:58 PM   #27
Alethia123 is offline Alethia123
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Seriously! most of the journey anywhere from Austin is just getting out of Texas. North Texas is just....thrilling....to drive through. It would be cool to organize a DIY audio show and tell. Does that exist already?

Hey yall, one other question. Im running the pair of othorns in 4 ohm stereo on the pl380. It struggles a bit in really getting them going, I can tell the driver want a little bit more. I looked in there and monitored them for hours and near full blast and they didnt show any signs of stress of damage, shoot....the travel of the cones seemed to be about half of what they "could" be capable of. The spider was only really moving on the innermost rings. I don't wanna blow a $700 driver, or burn a $2000 amp but.....Think its safe to re wire my patch bay and go 2 ohm?

PL380 Power Amplifier ? QSC

Can the amp handle that low of an impedance? Pardon my poor terminology.
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Old 7th July 2014, 09:40 PM   #28
weltersys is offline weltersys  United States
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Quote:
Originally Posted by Alethia123 View Post
Hey yall, one other question. Im running the pair of othorns in 4 ohm stereo on the pl380.
Think its safe to re wire my patch bay and go 2 ohm?

Can the amp handle that low of an impedance? Pardon my poor terminology.
Ever since I decided to sell my system (and sold the van and trailer it had been stored in), my shop has been set up as a DIY audio show and tell :^).

The PL380 amp can handle two ohm operation, though additional fans may be required to keep it from overheating when used for sub use.

That said, rewiring your patch bay does not change the speaker impedance, there is no way to get more power from the amp than your current use of one four ohm speaker per side, 2500 watts per driver. I'm hitting my 18SW115-4 with around that much peak power, and could use more, your 21SW152-4 could definitely use a lot more peak power than 2500 watts.

If you add a second PL 380, you could mono each into each 4 ohm Othorn and get around 8000 peak watts per driver, 5 dB more power than 2500 watts. A 5 dB increase at 20 Hz sounds twice as loud, though using that much power some would be lost to thermal compression (voice coil heating causes impedance to rise, amp delivers less power at higher impedance).

With 8000 watts per driver, you definitely have the potential for voice coil meltdown or mechanical failure, but you will hear what the 21SW152-4 are capable of .
If you decide to mono the PL 380, definitely use DSP capable of both peak and RMS limiting, as the long term RMS should be limited to only around 1500 watts.

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Last edited by weltersys; 7th July 2014 at 09:56 PM.
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Old 7th July 2014, 09:49 PM   #29
Alethia123 is offline Alethia123
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I see. Hmmmmmm. Better just tuck my ole ego in and turn the amps down a tad. Its already pretty darn loud. Its a little tempting because right at the point the amp blinks red and I have to turn it down, seems to be right where the othorns give that little exponential bit more. Grrr
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Old 7th July 2014, 10:11 PM   #30
weltersys is offline weltersys  United States
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If you don't see 32mm (about 1.25") peak to peak movement of the cones on peaks, you aren't getting the "full tilt boogie" experience, but the drivers will last longer.

At any rate, more power won't add exponentially, but you would definitely notice a 4-5 dB increase.
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