DAS Action 215 speakers fuse bulbs blowing |
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SamV
Old Croc Joined: 21 October 2008 Location: London Status: Offline Points: 8707 |
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I've heard that cab before and the 1" can keep up with the 15"s. There's plenty of dual 15 cabs out there with 1" drivers, including the much loved JRX125s.
I would say have a close look at the crossovers and make sure no ones does a bodged repair and changed the output of the HF.
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levyte357-
Old Croc Joined: 27 July 2012 Location: UK, South East Status: Offline Points: 8128 |
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Bulbs in crossovers.. Is this the 90's?
1. Get builder to make you copies of cab but for ME60 2" horns. 2. Get some Beyma 2" Comps, horns. 3. Bi amp cab using separate amps & LMS, no passive xovers. 4. Leave mediocrity behind. Edited by levyte357- - 30 November 2015 at 12:21am |
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Global Depopulation - Alive and Killing.
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Earplug
Old Croc Joined: 03 January 2012 Location: Europe Status: Offline Points: 7199 |
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"4. Leave mediocrity behind."
As I said before - you´re expecting too much from that 1" comp driver. Replace or add some more top-end boxes. |
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Earplugs Are For Wimps!
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Andy Kos
Old Croc Joined: 15 May 2007 Location: Southampton Status: Offline Points: 3035 |
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In many circumstances, yes, the 1" will keep up with the 15s. BUT, in this instance there are subs added, so the dual 15s arent running full range. I would imagine a 1" comp would keep up in this cab if used full range. I can see a 50W comp wouldnt always be able to keep up. For compressed audio off a CD, probably yes. For live music with a much higher dynamics, probably no. If as has been mentioned, the engineer is finding a need to boost the top end, there is probably just a little too much power going up there, not a lot, but enough for the lamps to pop occasionally, and ultimately kill the diaphragms. Ive known diaphragms to die from an idiot shouting into a microphone on what is otherwise a completely acceptable PA sytem.
Edited by Andy Kos - 30 November 2015 at 9:52am |
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just a guy with a warehouse and a few speakers... www.bluearan.co.uk
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Mystery.tipster
Registered User Joined: 29 November 2015 Location: Gosport Status: Offline Points: 14 |
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Andy you say we may not have enough headroom do you mean the speakers or the amp? The speakers are 700w RMS and amp sends out 760w per channel
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cookie-dj
Young Croc Joined: 09 May 2014 Location: Warwickshire Status: Offline Points: 977 |
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Amp ideally should be around 1.5 rms rating of driver for headroom
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You can't polish a turd!
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Andy Kos
Old Croc Joined: 15 May 2007 Location: Southampton Status: Offline Points: 3035 |
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Both. The amp should be bigger than the speakers, (different people have different ideas on this, but 1.5 x is not a bad starting point) but also the speakers need to be able to handle the dynamics in the program material. Adding subs to the system will bias the power handling towards the low end quite significantly, from your description you have ample there. My guess is your comp drivers are only just able to keep up with the rest of the system (hence the crossover bulbs popping) - so not much headroom here. Also, your amp could easily drive to clip, so no headroom there. Without seeing exactly what you do and how you do it, it's impossible to be sure whats going on, but does to me seem mostly like you dont quite have enough. |
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just a guy with a warehouse and a few speakers... www.bluearan.co.uk
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Mystery.tipster
Registered User Joined: 29 November 2015 Location: Gosport Status: Offline Points: 14 |
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Hmmm this makes me think, if we are using the crossover to send above 150hz to the full range DAS 215's which has 2 x 15 bass loud speakers with the 1" horn are we in fact sending too much highs by doing this as you said? Are we better off not using the crossover and/or not using the separate 18"DAS bass bins as well so just running the Peavey CS2000 set to default straight into the DAS 215 with a full range signal?
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Andy Kos
Old Croc Joined: 15 May 2007 Location: Southampton Status: Offline Points: 3035 |
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No... you're just shifting the balance of power a little to make your system bottom heavy then your HF cant keep up.
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just a guy with a warehouse and a few speakers... www.bluearan.co.uk
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ceharden
The 10,000 Points Club Joined: 05 June 2005 Location: Southampton Status: Offline Points: 11776 |
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Bottom line is that on a system with bass bins and twin 15" midrange, a 1" compression driver, especially not what is likely to be a cheap one, will not keep up and definitely not with live music.
A 1" driver with a single 15" is a massive compromise, with a twin 15" it really doesn't work except for what I'd call 'low end mobile disco'! So unfortunately the only real solution is to beef up the HF. I've taken the liberty of downloading the CAD drawings from the DAS website which rather helpfully give accurate dimensions so I can tell you that you'd be able to replace the HF horn with a wide variety of 1.4" exit versions. These aren't the cheapest option but most likely to drop in without any woodwork: Add a pair of these which Andy is currently doing for silly money: Or choose something slightly more expensive if you prefer! The current crossover might not be ideal for the new compression driver and horn combo but that could be rectified too if necessary. There are various options anyway. |
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ceharden
The 10,000 Points Club Joined: 05 June 2005 Location: Southampton Status: Offline Points: 11776 |
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Everybody I've seen mention those cabs or the 115's has blown the HF and replaced it with something else, usually a BMS!
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levyte357-
Old Croc Joined: 27 July 2012 Location: UK, South East Status: Offline Points: 8128 |
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Umm, nobody will be adding these from Andy, for a while, as I've just snapped up the last 2x... |
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Global Depopulation - Alive and Killing.
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