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Showing content with the highest reputation since 11/02/2021 in Posts

  1. Had a pretty good outing this past weekend with our 4 Skrams and 2 Keystone subs for a 400 person event! Skrams are running off a Linea research 44m20. Tops are a pair of PM90 mid-highs which we just completed and powered by custom Hypex amps with a Linea Research ASC48 for sound processing . Was extremely limited on speaker placement because of the low tents and would have liked to run the Skrams on their sides or separated them slightly to spread out the coverage. Once we retire the keystones I think we may need to build another 2-4 Skrams to keep up with the Midhighs for bass heavy music but really impressed with the output overall! Got a lot of good feedback regarding the sound and people really appreciate the change from the usual PK cx800 double 18 subs that have over-saturated the market on the BC west coast.
    3 points
  2. Being a dual SKRAM owner and using the B&C 21SW152 for the last 1.5 years in this setup, I agree with Jay's description of how they sound. They are simply too brutish and over excited the room even at lower volumes. - This is in my 2 car garage/workshop. They are War Machines, these things kick ass and people take notice immediately. When paired with the right tops, like the Danleys or Meyers in my case, you're going to rock the house. If I was to build a system for in my house, I'd go with the BC 18SW152 in a dual setup or something much much lighter. The 21's are just too much and there sound doesn't really fit properly in a small space. (Coming from a Strictly Bass Head Opinion and not a home theater guy opinion...yet) Tops usually are not pointed so far down, was in backyard
    3 points
  3. Have a bit of an interesting field use report for my Skrams. I recently added new processing to my system using an XTA DPA 100. It’s a pretty interesting 4 channel amp, which I am using to bi-amp my Danley sh46 cabs. It also featured 4 channels of output control to add processing to my slave sub amplifiers. I used the information within this XTA/MC2 document on limiters to set up protection on my sub amps. https://audiocore.wpengine.com/wp-content/uploads/2018/05/XTA-Application-Note-DPA-Amps-Limiter-Settings.doc.pdf using the chart within this document it says to set up the 21sw152 at 86.9 volts for limiting, minus 1db for safety margin. Having always been a little hesitant on knowing just how hard I can safely drive my Skrams I added a 2 wire thermocoupler temperature sensing system to 1 of the cabinets to monitor magnet temperature. 1 wire is mounted on the external circumference of the magnet, the other right next to the vent on the end of the magnet body. last night I provided sound for a local dubstep crew, 7 hours of continuous deep sine wave bass. Peak volume was held for about the 3 final hours of the night, at maximum I was running about 2db down from where limiting would engage. Monitoring throughout the night, magnet temperature peaked at 44 degrees Celsius. This was also in a packed sweaty room that was raining condensation from the roof. pretty interesting to get some real Information about what the drivers are doing deep within the skram cabinets under real world conditions. I had previously come across a statement from Bennet Prescott who works with B&C saying that the 21sw152 can sustain 100 degrees magnet temperature without thermally damaging the coil. Previously I had been limiting these drivers to around 50 volts, it seems that in the Skram alignment we should be able to safely push them beyond that a bit without getting too much temperature build up. This of course may change for other types of music, I will continue to report back when I can speak to temps I’m seeing when doing other types of music shows. Data is beautiful. Always a pleasure getting to flex these cabinets, in a town where double 18’s rule, the Skrams are raisins eyebrows and making lots of new fans.
    3 points
  4. The ds and sw are very similar in maximum output at their respective program powers. Bennett from B&C said you should only really use the sw if you need the higher power handling, otherwise it doesn't really matter which you pick so you should go for the cheaper one. Here is a hornresp of different drivers I've compared in the SKhorn
    2 points
  5. Yes, a synergy type horn or for patent sake, a unity horn. I don't have a link to it because I didn't bother to make a build thread. It's my own mix of ideas based on Art Welter's SynTripP, B. Waslo's spreadsheet and the input of Chris A. on the Klipsch forum. I've built two cabs with 12" drivers and finishing up two more cabs with 10" drivers. I didn't port any of them. It seemed to me that 4 drivers would have enough clean output with moderate EQ without having to deal with ports. I'm very happy with the results. I'm using the Eminence TexTreme CD crossed around 850hz. It's certainly usable a little lower but to my ears it's a little less "honky" at high output.
    2 points
  6. @m_msThe CX800 is a sub developed by PK sound geared primarily towards electronic bass music. They are quite popular around here in the electronic music scene as having PK on your flyer generates a decent amount of hype for these types of shows. Now this is my own opinion based on experiences attending and throwing events on the BC West Coast but i have found they suffer from pretty bad port compression especially when pushed even reasonably hard. The bass essentially turns into a very boomy/chuffy/distorted one note kinda deal that's meant to be more felt than heard. When run properly arrayed and at a reasonable level they can sound pretty good for dubstep and drum&bass but i have found that the Skrams sound way tighter and punchier overall especially when it comes to house/techno/trance. Kick drums sound like actual kick drums where as on the cx800 the kick often loses its definition. At the end of the day i think the Skrams just do a better job overall at reproducing the original program material compared to the cx800 which impart more of their PK signature sound which sacrifices musicality for a more visceral feeling. There are many examples of ported double 18's out there that don't suffer from this type of problem, it just so happens that in our scene PK sound is used almost exclusively now a days so that's why people at the show noticed the difference in the Skrams.
    1 point
  7. The QSC sub is larger and probably has more vent area compared to the Skram (when you block Skram ports to reach the same ~25Hz(?) tuning), meaning the QSC will be louder in the sub bass. Skram is front loaded, which means it's more efficient (louder) in the mid/upper-bass region. Skram is basically a band pass, which means it also masks some distortion. That would be the 3 main differences I guess. Skram has a rising native voltage sensitivity, while the QSC is probably pretty flat, going by my gut feeling here.
    1 point
  8. I caution it as well, experiencing 2 skrams will make you want to have 4 :). But I'm a degenerate with 2 skrams, 8 sealed stereo integrity 18s and 8 sealed pa460 18s blended in one room.
    1 point
  9. Should work out well then. Yes foam is perfectly fine. Cut to shape but oversized and stuff it in there. Yes it will be a tiny bit lossy. It doesn't matter. No need for wood blockers unless the foam makes your OCD trigger. My top pick for these is still the NSW6021-6 Eminence, but the Lavoce should do fine. The Eminence gives some advantages in response smoothness, ultimate headroom, distortion and compression performance but at increased cost. Unless you run them hard enough to start straining the Lavoce or 21SW152-4 driver most of that will not come into play though. In a home? Not so sure the extra guts are necessary.
    1 point
  10. I just finished A/B'ing a Skram with a LaVoce and the Eminence. There is a slight difference in the sound quality to my ears but it could be just as much a placement issue as timbre. I didn't keep track of the cabinet placement when I swapped out drivers. That's how slight the difference is to me. I say go for it with the cheaper drivers. I also picked up some more plywood from my supplier (Nashville Plywood) yesterday. Supply is back on track and prices are down slightly. They were of the opinion that eventually the price will come down almost to where it was before all the crazy started. I like your setup. I just finished my version of a 4 12" driver MEH and I find myself just sitting in my shop listening. Going 2 way from the Skram to the MEHs.
    1 point
  11. Hahaha. Use the volume control fellas. I say go for it and run 2 in the house. Plug a vent or two for deeper tuning since you will not be using all of the headroom. May as well go for lower extension. I would pick these over the Othorn. Yes if you let a pair rip in your home it will be a bit much. What I often find is this type of sub sounds clean at volumes most others don't, so you end up turning them up higher than usual because it just sounds good/effortless/fun compared to a typical home sub. This gets out of hand quickly in a small enclosed room. I tend to like going way overkill and use <50% because it ends up sounding so clean. Plus if I ever want to get stupid it's there on tap. Disagree a bit on the 21SW152 or other big pro drivers not being able to do nuance.
    1 point
  12. I am in North Lake Tahoe, Truck is stored and worked on in Truckee. We rollout to the Black Rock Desert or a couple spots in the woods. You are in Canada? Would love to combine forces!
    1 point
  13. Well said tahoe, the overbuilt heavy and robust 21sw152 is meant for high power mayhem, at low volumes I wouldn’t consider it delicate and nuanced. I’m currently using a direct radiating reflex in my living room using a light weight high sensitivity driver and it’s much better suited for the size of the room. Even at low to moderate levels the Skrams were knocking plaster off the roof of my living room, the design is just not meant for home use in my opinion. Perhaps a lighter duty more efficient driver in the skram could work really well in your situation but I don’t have the experience to back that up. where is this war machine truck of yours Tahoe? We should meet up and let our Skrams have a play date haha
    1 point
  14. Sound quality wise, I'd take skrams over double 18's all day every day.
    1 point
  15. I have a fairly small listening room at home as well and at one point I had a pair of skram's with sm60f set up. They were pretty exciting for certain types of music, live music recordings in particular were really incredible. I wouldn't have kept them in there though, they were simply too brutish and over excited the room even at lower volumes. If you do try this I would recommend using a different driver than the 21sw152. I think somewhere in this thread someone made some listening impression comments on various drivers and the 21sw152 was characterized as darker sounding compared to some lighter cone options. The 21sw152 is still one of the top drivers for war volume applications, but I think there would be better options for low volume listening.
    1 point
  16. This is a great room to play in, its been properly sound treated due to it being a live music venue. This system crushes in this space
    1 point
  17. What do you mean by low level? The last measurement was taken at 0dbFS, which produced 6,6V at the Fireface's output. Here is a direct measurement of the FF without the pmillett in the loop (max output 6,6V as before): Best THD is achieved at 0.5V output, best noise floor at maximum. Here is the THD/Noise vs output plot:
    1 point
  18. At the risk of becoming a @h3idrun Reply Guy, here's some Melbourne plywood info: Plyco in Fairfield have 18mm Birch BB for $160/sheet and Hardwood Exterior Plywood for $100. I think they'll chop it up for a relatively modest fee if transport is an issue. Here's another supplier - don't ask me what all the terms on that page mean though! Also, Upton's in Epping sell some really cheap, VERY light plywood that I reckon I'll use at least for bracing, once I get around to building something. I can't find it on their website, but give them a call if you're interested.
    1 point
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