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 Re: SPL meter or Auto Setup
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Joined: Sep 2004
Posts: 11,458
shareholder in the making
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shareholder in the making
Joined: Sep 2004
Posts: 11,458 |
Quote:
the distance should be more than actual and for a good reason too, it just slipped my memory though.
The circuitry within the sub (crossovers; amplifiers) add an inherent delay to the signal output. The receiver's circuitry sees it as "farther" in that the sub's sound reaches the mic a little later than the other speakers.
So, the "auto" circuitries falsely report that the sub is further away than it physically is, but make the necessary corrections to bring all the speakers onto the "same plane" so to speak.
In short: The readings wrong, but the correction is, ummm..."correct".
::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::
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Re: SPL meter or Auto Setup
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Joined: Jun 2004
Posts: 173
veteran
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veteran
Joined: Jun 2004
Posts: 173 |
Quote:
I can't comment on the frequency range the meter covers as I don't know the specs, but my recollection is the meter I have registers the base sweeps from the AVIA disc. Also, I don't recall folks on this forum (who are far more knowledgable on these topics than I) who have discussed efforts to eliminate frequency nodes mentioning a concern about meters than don't cover the full audible range.
Paul
I never thought about frequency range. I use this meter and have to have my sub's input level at about 1:00 to get it near 80db. But when I watch a movie, I turn it down to 11:00 or I get too much base. Maybe this meter isn't going below a frequency where many LFE reside resulting in inaccurate calibration.
Anyone know what frequency this meter can read down to?
Greg
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Re: SPL meter or Auto Setup
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Joined: Jun 2005
Posts: 1,189
connoisseur
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connoisseur
Joined: Jun 2005
Posts: 1,189 |
Quote:
I have heard that your sub should be alot more distance than what it really is.
I believe it is just for devices with digital processing, such as the newer Axiom subs with the DSP chip. If I remember right, John quoted 3 feet extra for an Axiom EP500 or EP600 connected to the receiver/pre-amp. If also using a digital sub EQ (like the Velodyne SMS-1), then add another 3 feet for a total of 6 feet extra. Best to experiment and see what sounds best to you.
The extra distance tells the receiver to send the sub signal a little ahead of the other channels, making up for the extra time delay in the digital processing devices.
Last edited by dllewel; 01/04/07 11:04 PM.
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