micah3sixty
I have an stock MFW-15 and am wondering if it would do well enough outdoors or if something from a commercial line would do better.  The other sub I would consider is the Behringer EUROLIVE VP1800S 1600W 18" Subwoofer.  Thoughts?

Thanks.
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FOH
micah3sixty wrote:
I have an stock MFW-15 and am wondering if it would do well enough outdoors or if something from a commercial line would do better.  The other sub I would consider is the Behringer EUROLIVE VP1800S 1600W 18" Subwoofer.  Thoughts?

Thanks.


Interesting question.

Immediately, having set up both some fun backyard audio, and some serious outdoor sound, I'm curious what the application is, because this can dramatically change the requirements. Both the application, and the source material will help direction, because playback level and desired extension are the two relevant parameters to the exercise.

By mentioning the Behringer, it would seem you're thinking a more long term application, is this correct? I know nothing of the Behringer, but damn, .. it's certainly inexpensive!

Also, if you could include any specifics as to boundary proximity, in the immmediate area adjacent to the sub(s).

Thanks  


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micah3sixty
Extension is important as movies without sub 40 hz frequencies really lack some of the deep impact effect.  The sub will likely not be up against any walls or structures due to my screen/equipment placement.  Many DJs and commercial pro audio users like that Behringer sub due to the low cost and relative efficiency of the driver (400w rms).  It says it only goes down to 40hz though so that might be my deciding factor.  Any other tips for sub placement outdoors?
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FOH
micah3sixty wrote:
Extension is important as movies without sub 40 hz frequencies really lack some of the deep impact effect.  The sub will likely not be up against any walls or structures due to my screen/equipment placement.  Many DJs and commercial pro audio users like that Behringer sub due to the low cost and relative efficiency of the driver (400w rms).  It says it only goes down to 40hz though so that might be my deciding factor.  Any other tips for sub placement outdoors?


If extension is important, I'd not consider the Behringer sub. Even most good quality pro style subs would lack extension.

If you want the deep extension, then you're going to need to help your MFW-15 out. Acoustic loading nearby a wall, ideally a corner, would help immensely. But, as you stated this likely will not happen. So I'd examine a couple other avenues; proximity and hi-pass filtering.

With proximity, the sub's SPL will drop off at 6dB/per doubling of distance. Examining this, we can take advantage and bring the sub closer to the seating are and gain 6dB/per halving of distance. There's pluses and minuses involved; in the plus column, you gain the impact and more tactile experience, but the only negatives are the level variance may be significant person to person,...since the sub is so close. This, is splitting hairs, but I thought I'd mention it as I've gone through these exact situations and issues.

The hi-pass filtering may be so counter-intuitive to us enthusiasts, but eliminating some of the most demanding frequencies, you'll gain huge pay-offs regarding overall playback capability. I'd experiment with the settings, ideally using more than one source as material, but in doing so this step could easily gain you significant SPL capability that would otherwise get gobbled up attempting to reproduce the deepest effects. 

Mark or Kevin may be able to help, however I'm sure there's some type of hi-pass already inherent to the design. Any vented approach can benefit from over-excursion protection below tuning. If the built in high pass isn't adjustable, and if you don't have some high pass filter in any EQ tool you own, I'd suggest the Behringer MIC2200. It's typically offered at or under $99, and has level shifting (pro/consumer), phase inversion, one band of parametric EQ, and most importantly, variable/defeatable high pass.  

One other item, again splitting hairs, but you'll benefit from some phase, or time alignment tool to align the output from the mains and sub, if negative time related issues exists. The overlap coverage between the sub and tops could be a mess is way out of alignment. It's easy to hear outdoor to, absent all the typical indoor reflections, etc.

Hope this helps 

 











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iostinato
I'm also on the hunt for a good outdoor sub(s) but for music on my patio (18' x 30'). I take it you want a sub with a long throw and low extension for HT use? Will you keep your subs installed outside or just bring them out occasionally?
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micah3sixty
I'm now looking at DIY subwoofers using 18" drivers with high SPL/sensitivity.  My amp died on my MFW-15 so I'm going to use a Crown XLS 1500 and Behringer MIC 2200 with the MFW-15 box/driver for now but have the power and EQ to upgrade later.  If anyone has recommendations on DIY subwoofer projects that would work well outdoors, I'd love to hear them.
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Thomas_Smith
BTW nice choice, but did you considering to choose Niles GS4 Garden.  You could also pick some from James Loudspeaker.
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