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Multi-Way Conventional loudspeakers with crossovers

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Old 16th September 2012, 12:48 PM   #11
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Looks like REW so it should be a logarithmic swept sine measurement I'd guess. I'd also be suspicious about it being a three way with the need for the mid to be reversed in polarity (having been there done that with my first measurement ---> Speaker Workshop + Microphone = invaluable )

edit. that new plot doesn't look as bad, did you change the mic position to be closer to the speaker?

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Last edited by wintermute; 16th September 2012 at 12:52 PM. Reason: saw a new post.
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Old 16th September 2012, 12:58 PM   #12
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no , i cant change anything , the room is so small , thats just the effect of minidsp equalizing
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Old 16th September 2012, 01:06 PM   #13
a.wayne is offline a.wayne  United States
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Is that an open baffle measurement ..? Looks like It, typical dog leg below 1K , why not take it outside and do GP measurements ...

Much better accuracy ....
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Old 16th September 2012, 01:08 PM   #14
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thanks wayne , but i live in an apartement i cant do that , my main interest is making the speakers sound good in this room since they wont be used anywhere else
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Old 16th September 2012, 01:19 PM   #15
a.wayne is offline a.wayne  United States
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Ahh c'mon , there must be an empty parking lot where you can measure , capture the necessary data, then you can do your xover sims at home after acquiring the data ..

Try Seixas Village ..

Is it an open baffle design ...?
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Old 16th September 2012, 01:22 PM   #16
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its a 3 way classic ported design , 7" woofer 5" mid 1" tweeter
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Old 16th September 2012, 02:05 PM   #17
tvrgeek is offline tvrgeek  United States
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You really need to change to MLS type measurements. Sweep is great for below 200, but above that, to separate the room from the speaker, you need a gated pulse. Download ARTA and measure at one foot and one meter as well as your listening position. You will learn a lot. Remember, measurements are to give you a hint to make it easy to tune for your ears in your room. My complements you realize it is your speaker in your room to your ear. So many get carried away with the measurements hay forget this most basic advantage of DIY.

The above sweep looks darn good. 500 Hz is within the range of absorbers. The only time I have had a room with a single big peak it was a cavity next to a fireplace. I put a door over it and it smoothed out. ( about 1K) Have you moved the speakers around a little? It is a bit of an art making a living room into a listening room while maintaining WAF. It is worth the effort as you will learn so much about acoustics, as well as the benefits of WAF.
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Old 16th September 2012, 02:20 PM   #18
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thanks tvrgeek i will download it
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Old 16th September 2012, 03:08 PM   #19
a.wayne is offline a.wayne  United States
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Indoor measurements are still only good to 700 hz , too much reflections unless you have the speaker suspended and quite a distance from the walls....
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Old 16th September 2012, 03:31 PM   #20
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Quote:
Originally Posted by tvrgeek View Post

To understand measuring, pick up a copy of Measuring Loudspeakers ( clever name eh? ) by Joe D-Apolitto.
I can't express how much I hate this book, I spent a year studying this thing about 8 years ago, and I came to the conclusion that it is very poorly written. In order to understand it, you have to already know it.

It's nearly impossible for beginners to grasp it.
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