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Does anyone know if the test was done outside, at 2 meters like Ed's tests?
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Originally Posted by ManicMiner Thanks Ed. But it was done at 2 meters? Do you have an guesstimate as to which SVS that would give you the same SPL? |
I thought that you could add 6db for every meter you moved the mic closer to the sub, and therefore could subtract 6db for the first meter, and 4db for the last two feet? Guess I'm missing something |
Originally Posted by Ed Mullen Without question, AV Talk has the best compilation of test data (1/2 space at 2 meters) for Velodyne subwoofers. I would refer you there for further research. |
Originally Posted by ManicMiner I see one other way of guesstimating the SPL 1200II's output at 31.5hz. Take Tom Nousaines measurement of 93db at 32hz for the SPL-R 800, and add the 6db difference between the SPL800II and 1200II from John E Johnsons test=99db at 31.5hz? i'm also guessing that the max SPL measurements done by John E Johnson was done with THD above 10%? Feel free to to call me dumbass, and offer me a swift kick to the ass |
Originally Posted by Prozakk As well they should, being OWNED by Velodyne! BIASED. |
Originally Posted by ManicMiner I think I found the simplest solution of them all, I measured my own PB10 at 1 foot and 31.5hz and got 118db. One question Ed about measuring subs outside. Since the mic is placed in front of the sub, will it not favor subs that are either closed, or have the port in the front? What I'm getting at is: When inside there will be surfaces to reflect ports that are facing backwards, so that the subs who have backward facing ports will maybe gain more db's from beeing measured inside, compared to the closed subs. This maybe be a stupid idea, because I had it just now |
As well they should, being OWNED by Velodyne! BIASED. |
And I have even one more question. The max SPL tests for the SPL series was done at 1 foot, would or wouldn't a 6db difference at 1 foot still be a 6db difference at 2 metres? |
Originally Posted by Ed Mullen Not necessarily. |
Originally Posted by Ed Mullen I think they did a fair and honest job on the testing and I've stated that before and also at AVTalk. Yes, the shoot-out was sponsored by the largest Velo dealer in the UK, and yes many of the participants own Velo (as well as other brands). But I think that professional integrity can (and did in this case) rise above ownership preferences. |