AudioCircle
Industry Circles => Salk Signature Sound => Topic started by: jsalk on 11 Jan 2017, 07:37 pm
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Jared called and asked if we could build subwoofer cabinets for a pair of some 24" drivers he was having built. We had done 18" subs in the past and so it didn't seem like much of an issue.
About two months later, a truck delivered a pallet with two HUGE cartons. After opening one of the cartons, I realized we had an issue. This was going to be a MASSIVE task...far in excess of what I had imagined. But since we committed to building them, we went to work.
(http://salksound.com/gallery/Jared Corn/dryfit-2.jpg)
The first task was to design all the internal bracing to accommodate the drivers and plate amp. It was a bit more complicated than usual since we had to support the driver magnet. If we failed to do that, if the truck delivering them hit a bump, it would probably rip the magnet right off the driver frame (the magnets were massive).
(http://salksound.com/gallery/Jared Corn/rawcabinet.jpg)
Once we got everything to dry fit perfectly, we assembled the cabinets.
(http://salksound.com/gallery/Jared Corn/readyforassembly.jpg)
We then finished the cabinets and they were ready for final assembly.
(http://salksound.com/gallery/Jared Corn/aligningdriver.jpg)
This was no simple task as each driver weighed at least 150 pounds. So much care had to be taken to align the driver perfectly before lowering it into place since it would be almost impossible to re-align it afterwards.
(http://salksound.com/gallery/Jared Corn/loweringwithpalletjack.jpg)
So how do you lower a massive driver into place? Well, we built a large post that was fed up through the amp cutout to support the driver magnet. A pallet jack held the driver slightly above the driver cutout. Then, when the driver was properly aligned, we slowly lowered the pallet jack allowing the driver to drop into place in the cabinet.
(http://salksound.com/gallery/Jared Corn/magnetbrace.jpg)
Once the driver was in place, we finished the assembly of the braces that locked the driver magnet securely in place.
(http://salksound.com/gallery/Jared Corn/24-inch-subs.jpg)
This was the final result. Mary never likes to have her picture taken, but we needed a body in the shot to gain some perspective. She was nice enough to oblige.
We estimated that each of the subs weighed somewhere between 350 - 400 pounds. I have no idea how Jared moved them into his home theater, but he reported that after the set-up was complete, they were making serious bass flat to 5Hz.
Happy listening (and feeling) Jared...
- Jim
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Really should have a swarm of 3 or 4 ..... ;)
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Great job Jim :thumb:
I've dual 18" JTR captivator and thought that was insane but Jared beat me to it with his dual 24" :o
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What's the cost to produce these again in the same basic black finish?
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What's the cost to produce these again in the same basic black finish?
+1.
Thanks,
Anand.
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wtf
that picture doesn't look real. Thanks for sharing the steps it took to build these. I'm guessing these aren't the most profitable projects, but the satisfaction of overcoming the challenges must be fun (once its done) for your team.
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Mama bear those are huge!
Guy most own a forklift to move those into the house.
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What's the cost to produce these again in the same basic black finish?
Based on what Jared indicated he paid for the drivers and amps, I would guess they would come out at about $6000 each. Build time would be about 4 - 6 months since the drivers are hand made and take a few months to build.
- Jim
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wtf
that picture doesn't look real. Thanks for sharing the steps it took to build these. I'm guessing these aren't the most profitable projects, but the satisfaction of overcoming the challenges must be fun (once its done) for your team.
It doesn't look real because I stripped out the shop background in Photoshop. And you are right about profitability...they are not profitable. But the challenge makes us stronger :thumb:
- Jim
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Mary has gotten much smaller! :o
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Jebus, I think I pulled a muscle in my back just looking at this monster...
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Agree- the first thing I thought was "How could you possible maneuver those through the house and into position?" I hope they didn't have to go up (or down the stairs). And here I was feeling sorry for us when we were moving the Rythmik 15s that Jim built for us- I thought THOSE were heavy. I would have to use my shop crane for these- with no chance of getting them into the house.
Fantastic job on the framework and creative solutions to get it all assembled. Yikes! Could you imagine bringing a pair of these to Axpona??
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Based on what Jared indicated he paid for the drivers and amps, I would guess they would come out at about $6000 each. Build time would be about 4 - 6 months since the drivers are hand made and take a few months to build.
- Jim
OK, thanks. Are you willing to share the info about the driver/amp?
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See, this is why I like the big subs used in pro audio. Those come with wheels on the bottom.
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I couldn't get these images out of my head with the size and power requirements for these:
(http://www.audiocircle.com/image.php?id=156217)
(http://www.audiocircle.com/image.php?id=156218)
(http://www.audiocircle.com/image.php?id=156219)
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OK, thanks. Are you willing to share the info about the driver/amp?
Looks like Stereo Integrity BHS-24 driver and probably SpeakerPower SP1-4000 plate amp. Very similar to what is offered by Deep Sea Sound.
Here is a DIY sub with the same driver and unique grill:
(https://lh3.googleusercontent.com/-yTLQ0e-xfuA/VZ73rxOcI6I/AAAAAAAAL90/S0nhiboQcIw/s800-Ic42/257.JPG)
(https://lh3.googleusercontent.com/-bYzVhUOIICc/VZ73sl3s8uI/AAAAAAAAL98/iA2ZMI_iPzU/s800-Ic42/258.JPG)
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Looks like Stereo Integrity BHS-24 driver and probably SpeakerPower SP1-4000 plate amp. Very similar to what is offered by Deep Sea Sound.
Here is a DIY sub with the same driver and unique grill:
(https://lh3.googleusercontent.com/-yTLQ0e-xfuA/VZ73rxOcI6I/AAAAAAAAL90/S0nhiboQcIw/s800-Ic42/257.JPG)
(https://lh3.googleusercontent.com/-bYzVhUOIICc/VZ73sl3s8uI/AAAAAAAAL98/iA2ZMI_iPzU/s800-Ic42/258.JPG)
This is the best looking sub I've ever seen. Did you do a build thread for this?
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Damn.
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I have heard a 24" sub once and was impressed, dual sub's has to be insane. 5Hz sounds real close to the brown note.
Great work Jim!
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I see that fireplace in the background and think to myself... one of these days I wouldn't be surprised to see someone convert their fireplace/chimney into a transmission line sub.
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They won't be able to if they have two 24" to start. The chimney will fall down...
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I am the lucky owner of those subs. I bought the drivers (yes, Stereo Integrity BHS-24, custom made for lower Fs) and amplifiers (again, yes they are speakerpower sp1-4000) with the intention of building my own enclosures, however I ran out of time so I started looking for someone to build them for me. I'm honestly glad I ran out of time to build my own enclosures because I would not have come close to the amazing product built by Jim. On that note, Jim Salk is truly an amazing guy. He took a difficult project and exceeded my expectations in every way. His communication is great. His packaging of the subs was flawless (the packaging for each sub filled up every bit of a 48x42 pallet). The product is flawless. They're much more beautiful in person. They sound better than I hoped. They actually match my Funk subs in musicality and blow them out of the water for movies. The funks were extremely powerful for movies and never failed to impress me, but these subs are simply on another level. The first movie I watched after tuning the subs was Interstellar, and the rocket take-off scene shook my room to the point that I was worried about the drywall (seriously). The best part is the subs aren't even breaking a sweat. The drivers are so amazing that I have no high pass crossover and in fact boost the frequencies below 20hz and they refuse to bottom out even at 5hz at 100db. I will post a review of all of the stuff in my theater at some point a few months from now on AVS. Previous subs that I've owned have been: SVS PB-13U pair, ML Descent i pair, Funk Audio 18.0 pair and others that were unremarkable. These Salk subs blow all the others out of the water in every way except maybe a very small advantage in musicality going to the ML Descent i's.
FYI, I moved the subs by myself with the help of a furniture dolly, and yes it was challenging, even with years of powerlifting under my belt.
(http://www.audiocircle.com/image.php?id=156239)
(http://www.audiocircle.com/image.php?id=156240)
(http://www.audiocircle.com/image.php?id=156241)
(http://www.audiocircle.com/image.php?id=156241)
(http://www.audiocircle.com/image.php?id=156243)
(http://www.audiocircle.com/image.php?id=156244)
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Jim, could you build a pair for my Yugo?
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Nice!
Now you just need to upgrade your mains :wink:
I own the Funk 18.3 so I can relate somewhat.
Enjoy!
Anand.
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How much for subwoofer?
Driver? Amp? And box ?
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How much for subwoofer?
Driver? Amp? And box ?
See above.
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Wow, great job Jim and mojave. :thumb: mojave, that's especially amazing!!! Beautiful woodworking! Looks like something I'd make, but better. :wink:
I've been thinking about subs recently, was thinking two 21" in a force-canceling arrangement... :green: But that might be overkill as I'm not worried about covering movie effects, just music... maybe stick to 18s...
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I am the lucky owner of those subs. I bought the drivers (yes, Stereo Integrity BHS-24, custom made for lower Fs) and amplifiers (again, yes they are speakerpower sp1-4000) with the intention of building my own enclosures, however I ran out of time so I started looking for someone to build them for me. I'm honestly glad I ran out of time to build my own enclosures because I would not have come close to the amazing product built by Jim. On that note, Jim Salk is truly an amazing guy. He took a difficult project and exceeded my expectations in every way. His communication is great. His packaging of the subs was flawless (the packaging for each sub filled up every bit of a 48x42 pallet). The product is flawless. They're much more beautiful in person. They sound better than I hoped. They actually match my Funk subs in musicality and blow them out of the water for movies. The funks were extremely powerful for movies and never failed to impress me, but these subs are simply on another level. The first movie I watched after tuning the subs was Interstellar, and the rocket take-off scene shook my room to the point that I was worried about the drywall (seriously). The best part is the subs aren't even breaking a sweat. The drivers are so amazing that I have no high pass crossover and in fact boost the frequencies below 20hz and they refuse to bottom out even at 5hz at 100db. I will post a review of all of the stuff in my theater at some point a few months from now on AVS. Previous subs that I've owned have been: SVS PB-13U pair, ML Descent i pair, Funk Audio 18.0 pair and others that were unremarkable. These Salk subs blow all the others out of the water in every way except maybe a very small advantage in musicality going to the ML Descent i's.
FYI, I moved the subs by myself with the help of a furniture dolly, and yes it was challenging, even with years of powerlifting under my belt.
Jared - your room looks fantastic. Can I be your neighbor? Just not next door, or next to that. Maybe just down the street a bit and around the corner.
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This is the best looking sub I've ever seen. Did you do a build thread for this?
Wow, great job Jim and mojave. :thumb: mojave, that's especially amazing!!! Beautiful woodworking! Looks like something I'd make, but better. :wink:
All I said was "Here is a DIY sub. . . ." :) Sorry if I gave the impression I built it because I didn't. AVS member PassingInterest built that sub. He has the most incredible build threads which show almost every detail of the build. Here is the thread for that subwoofer: Bunker Buster Build (http://www.avsforum.com/forum/155-diy-speakers-subs/1726706-bunker-buster-build.html).
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I realize it might be a real pain, but if you got them off the floor a few inches you main gain some articulation.
They look amazing. I'll come over for movie night anytime. I mean... beaten up by bass night. Those are crazy.
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Damn on every level.
Honest question, I have to imagine you barely scratch the surface of what they are capable of output wise in your home? Heck, I just have a SVS SB13 and I worry at times about drywall cracking and light fixtures coming out of the ceiling.
Is your room "purpose built" i.e. built like a bomb shelter.
Impressive subs to say the least!
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I realize it might be a real pain, but if you got them off the floor a few inches you main gain some articulation.
Agreed. I have four subs, and whenever I lift them off the floor, I get cleaner bass. If a sub sits directly on the floor, you're gonna hear part of the floor.
I have a question about speed. Based on sheer size alone, I can imagine that these subs would great for some forms of music, but not others such as jazz. On the other hand, the drivers may not be moving very much to produce prodigious bass at moderate listening levels. How does the bass sound with various types of music?
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Just a quick note...we installed inserts on the bottoms of the cabinets so that if Jared wanted to use footers to raise the subs, he can.
- Jim
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My 15s can make the entire house "sing along" at higher SPLs. Decoupling bass cabs from the floor is extremely important imo, it reduces sympathetic resonances all over the house by quite a bit and makes the soundstage clearer and more defined. I use IsoAcoustics stands, they have some new footers out (Gaia series) but the subs are too big for them. The modular alum stands would probably work well as they are available in custom sizes. I could see a pair of those 24s causing damage to most homes for sure... :lol:
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What size is your screen? What projector do you have? Thanks.
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Very nice system. What is your crossover point? Thanks
Rocket Ronny
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Thank you everyone for the feedback and help! To answer some questions:
abd1: Yes, you can be my neighbor, but even if you were several houses down, my bass will still find its way to you. :D I'm lucky enough to have some space between neighbors, so my neighbors aren't really bothered by my bass.
Folsom: I have tried raising subs before and didn't get much improvement in the bass, however that was a different room in a different house so it might be different in this house, however, any higher and the subs would cover the screen, so I'll pass on raising the subs for now. I will say that the subs are extremely articulate already in my room, likely secondary to all the acoustic treatments.
DEP14: Most of the time, the sub drivers are barely moving and still destroying my ears. I imagine I have a ton of extra headroom... which is why I bought the beasts. The room was purpose-built, but not to the standards that it could have been.
Early B: The subs sound great at all listening volumes and all types of music. Their musicality actually surprised me because I was expecting them to sound a bit worse for music. They sound just as good as my old Funks, which are very musical. With that being said, I rarely listen to music with subs. My Sonus Faber Olympica III's have pretty good output to just below 40hz, and I enjoy the purity of the speakers by themselves.
stirman: my screen is 120" 1:2.35 with a JVC rs400u. I love the projector, my screen innovation screen is very good, but not exactly reference
Rocket_Ronny: I crossover to the mains at 90hz, the subwoofers sound great to over 150hz, but I like to run my subs a little hot, and crossover above 80-90 with a hot subwoofer sounds less natural to me.
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I am the lucky owner of those subs. I bought the drivers (yes, Stereo Integrity BHS-24, custom made for lower Fs) and amplifiers (again, yes they are speakerpower sp1-4000) with the intention of building my own enclosures, however I ran out of time so I started looking for someone to build them for me. I'm honestly glad I ran out of time to build my own enclosures because I would not have come close to the amazing product built by Jim. On that note, Jim Salk is truly an amazing guy. He took a difficult project and exceeded my expectations in every way. His communication is great. His packaging of the subs was flawless (the packaging for each sub filled up every bit of a 48x42 pallet). The product is flawless. They're much more beautiful in person. They sound better than I hoped. They actually match my Funk subs in musicality and blow them out of the water for movies. The funks were extremely powerful for movies and never failed to impress me, but these subs are simply on another level. The first movie I watched after tuning the subs was Interstellar, and the rocket take-off scene shook my room to the point that I was worried about the drywall (seriously). The best part is the subs aren't even breaking a sweat. The drivers are so amazing that I have no high pass crossover and in fact boost the frequencies below 20hz and they refuse to bottom out even at 5hz at 100db. I will post a review of all of the stuff in my theater at some point a few months from now on AVS. Previous subs that I've owned have been: SVS PB-13U pair, ML Descent i pair, Funk Audio 18.0 pair and others that were unremarkable. These Salk subs blow all the others out of the water in every way except maybe a very small advantage in musicality going to the ML Descent i's.
FYI, I moved the subs by myself with the help of a furniture dolly, and yes it was challenging, even with years of powerlifting under my belt.
(http://www.audiocircle.com/image.php?id=156239)
looks awesome!
So are you going to try to integrate the subs to play with the 24's, or "just" run the 24's?
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Rooster19: Thank you for the compliment! I thought about running the Funk subs nearfield, however once I played the 24's alone I realized I don't need nearfield :thumb: I'm actually currently trying to sell my old Funk subs on audiogon to let someone else enjoy them.