2x10" vented horn idea |
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Noud
Registered User Joined: 17 August 2014 Location: holland Status: Offline Points: 66 |
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Nice Chris!
Till how big of a venue do you use them? |
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Keen
Young Croc Joined: 30 May 2011 Location: Brisbane, Aus Status: Offline Points: 1203 |
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great! the horns are the same dims anyway so it makes no difference to the box layout. my quick google obviously ended up at the 2 inch version, sorry for the confusion
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Keen
Young Croc Joined: 30 May 2011 Location: Brisbane, Aus Status: Offline Points: 1203 |
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Noud, also noticed you’re actually going to use the cab on its side! In this case it’s very very important the mid drive units radiate inside one wavelength up to an octave past crossover freq. Otherwise you’re going to be giving 90% of the dfloor nothing below 1khz.
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Chris Grimshaw
Registered User Joined: 10 September 2018 Location: Sheffield Status: Offline Points: 281 |
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Depends on how loud the customer wants it. There was an event on at the stadium that was in the video. Mostly spoken word, some music. Something like 800 school kids (plus teachers) in attendance, so it didn't need to be particularly loud. The system was putting out 123dBC-slow at 1m. The peaks are 18dB up on that track, so it's 141dB peaks. A couple of years back it was used as the main PA for a family festival.
Sound was clear and reasonably loud (you could hear the music over
people talking) at 100m back, with a couple of thousand people in
attendance. However, it wasn't anywhere close to concert/rave levels at
the back, or even in the middle of the audience. The organisers were happy, though - everyone knew music was happening, and which way to go if they wanted to listen to it louder. So there isn't really a simple number I can put to this system. For a rave, a few hundred people is usually just fine. I've got 8x Faital Pro 15HP1060 in ported boxes and the subs usually hit the limiters first. People love bass... Chris
Edited by Chris Grimshaw - 22 May 2019 at 9:07am |
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Quality sound from Sheffield
www.grimshawaudio.com |
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Keen
Young Croc Joined: 30 May 2011 Location: Brisbane, Aus Status: Offline Points: 1203 |
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How are the 15HP1060 Chris? They’re one of the only decent drivers for sale (off the shelf) here in Aus? Are they quite solid for what they are?
Cheers
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toastyghost
The 10,000 Points Club Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10920 |
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The Faitail HP series are excellent drivers
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Chris Grimshaw
Registered User Joined: 10 September 2018 Location: Sheffield Status: Offline Points: 281 |
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Yep, the 15HP1060 drivers are really good. I've had a Crown MA12000i running all the way up to clipping driving a couple. Impressive output from some fairly small boxes, and they took the ~2200w power levels just fine. I feel like I could've pushed them further, but then I'd need an even bigger amplifier. These days, I use a Powersoft T602, and last weekend had the amp bridged into a pair of the 15"s. The venue (barn with farm house nearby) told me I could go as loud as I wanted, as they've never had any problems before. 10 minutes later, they came and asked me to turn it down because the farm house windows were all rattling. Good fun. Since the T602 is a little under-powered for running eight of these drivers, I'm thinking about dropping the tuning lower so the drivers still use all of their mechanical potential. A compact 30Hz box of some kind would be a lot of fun. Chris
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Quality sound from Sheffield
www.grimshawaudio.com |
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toastyghost
The 10,000 Points Club Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10920 |
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I will keep saying this until I’m blue in the face but there is zero chance you were giving them 2200 watts for any length of time if they still work. A larger amp would get you a totally negligible increase in output long term, but would give you the chance of melting the coils much more easily.
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MattStolton
Old Croc Joined: 04 September 2010 Location: Walthamstow Status: Offline Points: 4234 |
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I reckon that makes you Papa Smurf? Although that looks a bit more Tony A.S.S., any relation? I'll get my coat - Azrael, we're off. |
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Matt Stolton - Technical Director (!!!) - Wilding Sound Ltd
"Sparkius metiretur vestra" - "Meter Your Mains" |
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Father-Francis
Old Croc Joined: 24 October 2007 Location: Kenya ,Denmark Status: Offline Points: 2760 |
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😂😂😎nailed it .
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Music is the strongest form of magic.(+45 31879997)blakmanpro@gmail.com, foa@sweetboxaudio.dk
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Chris Grimshaw
Registered User Joined: 10 September 2018 Location: Sheffield Status: Offline Points: 281 |
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First, define "long term output". If you're talking about playing continuous sine waves, then yes, I agree with you. Power compression would eat that extra 3dB (over the 1KW long-term rating) quite quickly. However, almost all of the program material I play does NOT contain continuous low-frequency sine waves. If DJs are playing, it's usually for weddings, so it'll be mostly chart or cheese, where the bass has transients. The system also gets used for a lot of live music, where there's even greater dynamic range. I have had that Crown amp up to clipping with a couple of drivers per side, and when the clip light is on (ie, kick drum hits), the drivers are receiving full power. For the same amount of cone area and cabinets, the bigger amplifiers give me 3dB more "feel" to the kick drum, and haven't had any thermal issues, because of the program material that these cabinets get used for. Chris
Edited by Chris Grimshaw - 26 May 2019 at 10:09am |
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Quality sound from Sheffield
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Noud
Registered User Joined: 17 August 2014 Location: holland Status: Offline Points: 66 |
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It's been a while but i start building 4 K20 cabinets. After testing with a simple test cabinet i'm really happy with the sound quality and pressure! Sooo...
Today i'm going to pick up that last piece of wood. (build pics asap)
Ordered all the drivers and horns. so totally it will be: 4x XR1464c 4x ND950 1.4 8ohm 8x 10fh520 16ohm The next thing on the list will be look for a good second hand amp powering the 4 k20's I looked at a crown I-tech 6000 (read good en bad thing about reliably)??? or a Lab gruppen FQ6400 but it has slightly les power. Price max €1500 incl. tax Amps today: 1x powersoft d1604 1x zeck pt7 (I would like to replace it with the crown or lab gruppen or....) 1x Labgruppen Lab 4000 Also i was told it wise to protect de hf driver with a capacitor ? cut off about 650hz Edited by Noud - 21 August 2019 at 1:45pm |
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