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1st build, advice needed please! |
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herke 
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Joined: 04 November 2009 Location: Huddersfield Status: Offline Points: 171 |
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 Topic: 1st build, advice needed please!Posted: 05 November 2009 at 10:35am |
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Hi,
I'm wanting to build a HD15. It will only be used in my garage for occasional parties and to suppliment 2 large speakers I already have. The amp I will be using is a Monocor PA-5480 5 zone amp. It can be used as a 1x 480w RMS @8ohm output, so im wanting to use this amp for now. I have a few questions before I get underway and start building. 1) I was going to use a passive crossover rather than a low pass filter in the cab so that at a later date I can hook a tweeter unit to this to make a full range speaker. Is this normally how it is done? I dont want to get in to an active crossover etc yet, maybe in the new year. 2) If the amp is 480watts and the HD15 is 600w (kappa says 600w in the spec) am I going to be damaging anything or will it just be a bit quieter? Sorry if these are complete newb questions. Any advice welcomed Cheers! Neil Edited by herke - 05 November 2009 at 1:52pm |
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herke
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Joined: 04 November 2009 Location: Huddersfield Status: Offline Points: 171 |
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Posted: 05 November 2009 at 2:12pm |
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Hi,
I have been doing more digging and have scrapped the crossover idea. I will now just use a lowpass filter and in the future get an active crossover and a seperate amp for hi frequencies. So, basically all I need to know now is if I will be causing any damage to the amp or cab if I have a 600w cone and a 480w amp (8ohm) Many thanks Neil |
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Teunos
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Joined: 23 November 2008 Location: The Netherlands Status: Offline Points: 1799 |
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Posted: 05 November 2009 at 3:03pm |
No you won't damage anything by just using less amplification power than the woofer can handle. Only if you try to push things too hard and start running the amplifier in clip, you can easily destroy a woofer. Keep it from clipping and you'll be fine. (That is if you use the HD15 for the specified frequency range)
Edited by Teunos - 05 November 2009 at 3:04pm |
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Best regards,
Teun. |
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herke
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Posted: 05 November 2009 at 3:22pm |
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ok that makes sense.
Most of the low pass passive filters I have seen have been at 120hz so I was going to use something like that |
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subbass
Old Croc
Joined: 30 March 2009 Location: bristol Status: Offline Points: 1683 |
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Posted: 05 November 2009 at 3:25pm |
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just get a £60 behringer active Xover. so much more flexible than a passive :). means you're ready for upgrading straight away! (you'll need it anyways later)
BEHRINGER CX2310 SUPERX PRO Behringer CX2310 SuperX Pro - stereo 2 way/mono 3 way crossover with subwoofer output, 24dB/octave, phase switch for each output, switchable 25Hz sub filter for each input, ALPS potentiometer. Dimensions: 19" x 1U. http://www.thomann.de/gb/behringer_cx2310_super-x_pro.htm get it |
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subbass
Old Croc
Joined: 30 March 2009 Location: bristol Status: Offline Points: 1683 |
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Posted: 05 November 2009 at 3:28pm |
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herke
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Posted: 05 November 2009 at 4:29pm |
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yeah that looks good. I thought they were a lot more money than that!
Im hoping to have a go at building the cab this weekend as the missus is away and I have lots of powertools... |
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Teunos
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Joined: 23 November 2008 Location: The Netherlands Status: Offline Points: 1799 |
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Posted: 05 November 2009 at 4:52pm |
With ,,using it for it'sspecified frequency range'' I mainly meant that if you use it below cut-off frequency of the cabinet, cone excursion will go up very fast. Making a HD15 do 50Hz (which it won't even produce properly) with 500watts of power could blow out the driver.
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Best regards,
Teun. |
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herke
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Posted: 05 November 2009 at 5:37pm |
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would I be able to protect against that with an active crossover?
So basically you need to cut everything under say 55 and over 120? |
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subbass
Old Croc
Joined: 30 March 2009 Location: bristol Status: Offline Points: 1683 |
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Posted: 05 November 2009 at 5:46pm |
yes
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DjMidKnight
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Posted: 09 November 2009 at 2:19am |
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yes, you set the sub out to (id say 60hz atleast) and then turn the low out point to 120(might want to go a little higher like 140-180) XLR out to RCA or whatever your amp needs for input, take the high out to your main speakers, that would be the proper way to do it. |
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imageoven
Old Croc
Joined: 28 March 2007 Location: Scotland Status: Offline Points: 2186 |
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Posted: 10 November 2009 at 12:55pm |
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It should probably be pointed out that the HD15 is not designed to be used singly. 1 cab on its own won't go very low. a reflex cab might be a better choice?
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herke wrote: