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HD 15 (handles + time delay) |
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philip banyer 
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Joined: 27 October 2004 Location: Switzerland Status: Offline Points: 19 |
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 Topic: HD 15 (handles + time delay)Posted: 26 November 2004 at 11:13am |
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HD 15 Where do I put the handles? I guess in the speaker compartment I would then seal with silicon sealant. Time delay 2nd question, my midrange is just a normal box with 2 12s old fane design This stands about 1 meter above the HD 15 box, so how far forwards do the HD 15s need to be placed in front of the midrange. (or is this behind) I also have the Behringer dig xover but have not tried jet automatically time delay. Is this easy to do, and is it any good. Sorry for the dumb questions. Thank you for all the help you all give with your replies. PBanyer |
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dubsuction
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Posted: 26 November 2004 at 11:34am |
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hi! ....for the handles, i think you need to do as you said, cut out holes for the handles then seal, if you can find dom ask him as he's the HD15 master! as for time delay, they need to be moved IN FRONT of the mid/tops by the same distance as the horn length....in HD15 its not too long, maybe 50-60cm (never measured one) .....dom? hope it helps |
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peace+respect-always
**HIGH PRESSURE SOUND SYSTEM** www.highpressuresound.co.uk |
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Dave Slater
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Joined: 28 February 2004 Location: United Kingdom Status: Offline Points: 373 |
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Posted: 26 November 2004 at 1:45pm |
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you'll find bar handles will fit nicely just behind the speaker as for delays you need to delay the tops not the bass horn driven bass will always take longer to reach the front of the pile than anything else and you to pull everything else back to take that into account you need to work out where in terms of distance from the stack you want to align them for (suggest 6-8feet) measure the distance from your HD15's to the ears of the average height person and add about 85cm for path length now measure the distance for the tops and subtract that from the total for the HD15's which gives you the distance in delay you need to add to the tops to push them back into alignment with the HD15's to fine tune it invert the HD15's and play a test tone at the same frequency as your crossover point and play about with the delay setting until you hear it go as quiet as possible flip the polarity of the HD15's back to normal and hey presto your rig is now time aligned |
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norty303
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Joined: 18 August 2004 Location: Eastbourne Status: Offline Points: 8800 |
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Posted: 26 November 2004 at 3:09pm |
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To save you the trouble (unless you set it up automatically using your LMS) i did it with mine on Wednesday - 5ms
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norty303
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Posted: 26 November 2004 at 3:12pm |
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Oh, dave, surely with that method, if you miss the first phase of cancellation it's possible to go a whole wavelength out. Suppose it's good to check the numbers are reasonably what you expect
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My laser stuff: Frikkin Lasers
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Dave Slater
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Posted: 26 November 2004 at 3:39pm |
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yeah if you're daft enough to keep winding the dial 'stead of going back the other way if you go too far in one direction you'll hear it getting louder as the two boxes sum their outputs together with the HD15's being inverted they are in phase at this point but if they were running normal you'd have reached the 180 degree out of phase mark you should be in the right ballpark with 85cm path length (shorter if anything) on the HD15's but doing it by ear and measurement not automatically you can't account for any group delay off the tops unless you fine tune it like this
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norty303
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Posted: 26 November 2004 at 4:02pm |
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Hey in my world anythings a possibility!! |
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My laser stuff: Frikkin Lasers
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Dom
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Joined: 25 February 2004 Location: United Kingdom Status: Offline Points: 1700 |
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Posted: 26 November 2004 at 7:36pm |
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That actually sounds a bit out... 5ms is 1.7m, which is about double what you'd expect (in fact almost exactly double), and more like the horn length of an 1850 Horn... I wouldn't trust the results you get from auto setting on an LMS, especially a behringer one Even SMAART gives really odd responses unless you use pulse tones the same frequency as your crossover settings, as you get the delays from the crossover as well... We used the sine wave method when we brought the rig down to that barn party (no it wasn't some crazy experimental techno we were playing) and we were only ever a couple of cm out at each crossover point with our initial guesses based on horn length(Superscooper 2.2m, HD15 85cm, MT12 55cm, 2" 25cm, slots 5cm) |
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norty303
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Posted: 26 November 2004 at 10:10pm |
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Yeah, i shouldn't have posted that really, it was a hazy memory from wednesday night (it had a 5 in it...ummm) and i had the speakers set up in a funny way so it wasn't a traditional setup by any means and to suggest that my delay will work for you is, frankly ludicrous! *slaps wrist*
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My laser stuff: Frikkin Lasers
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tb_mike
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Posted: 27 November 2004 at 7:38am |
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True. Testing in the middle of the passband makes sense. |
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Andrew
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Posted: 27 November 2004 at 1:32pm |
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HD15 handles, best recessed so that the screw heads are below the surface, get much less scratching of the cabinets. I've tried auto delay on Behringer and got some wierd results. Any guru's? |
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Dom
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Posted: 27 November 2004 at 8:13pm |
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Yeah, use your ears.... They don't tend to get confused so easily... It's not like you have to it to do it all the time. You only have to work out the delays for each box once. |
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"It sounded like a million fire engines chasing ten million ambulances through a war zone and it was played at a volume that made the empty chair beside me bleed."
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yeah if you're daft enough to keep winding the dial 'stead of going back the other way
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