How to setup subwoofer crossover on A-S500 - AVS Forum
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post #1 of 9 Old 02-15-2013, 06:35 PM - Thread Starter
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I have a A-S500 amplifier and a BIC F-12 subwoofer. The A-S500 seems to have no way to set the crossover frequency.

The manual for the subwoofer seems to suggest that if you set the receiver type to "pro logic" the crossover control will work. I have to assume that's only for the subwoofer and won't affect the speakers or receiver, right? I thought the sub out was just a one way signal.

Does the a-S500 have a default crossover or none at all? If it does have a default crossover frequency, should I set the subwoofer receiver type to "digital" or "pro logic"?

An option would be to run the speaker wires through the subwoofer, but that sounds unideal... I'd much rather line input.
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post #2 of 9 Old 02-15-2013, 07:38 PM
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Originally Posted by hypophthalmus View Post

Does the a-S500 have a default crossover or none at all?
It appears to have no internal high-pass filter, so the main speakers are driven full range.
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If it does have a default crossover frequency, should I set the subwoofer receiver type to "digital" or "pro logic"?
The subwoofer does not care if the source is Pro Logic or DTS/DD. It makes no sense that such a switch is on the sub, so you can ignore it. Does the owner manual explain what changes?
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An option would be to run the speaker wires through the subwoofer, but that sounds unideal... I'd much rather line input.
You do not need to do that, since the Yamaha has a sub output already. Just connect that to the line input (phono jack) and then adjust the gain and frequency controls for the desired effect.

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post #3 of 9 Old 02-15-2013, 07:48 PM - Thread Starter
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All the subwoofer manual, if the receiver type is set to "digital", the crossover setting won't work, but if it's set to "pro-digital" it will. But like I said, I have to imagine that the crossover knob only affects the subwoofer... right?
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post #4 of 9 Old 02-15-2013, 08:09 PM
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^^ Correct. As long as you can adjust the frequency response of the subwoofer, you are good to go. Just try to get a good blend between the sub and the main speakers.

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post #5 of 9 Old 02-15-2013, 08:12 PM - Thread Starter
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Would it be worth installing a high pass filter going to the speakers?
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post #6 of 9 Old 02-16-2013, 12:13 AM
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^^ That depends on what you are trying to achieve.

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post #7 of 9 Old 02-16-2013, 06:45 AM
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Just let your front speakers run full- range and set the crossover control on the subwoofer to complement them,

If your low-frequency response of your main speakers goes down to 50 Hz, for example, the subwoofer should be set so it only goes up to 50 or 60 Hz.

The exact best setting will be found by experimenting and listening.
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post #8 of 9 Old 02-16-2013, 08:09 AM
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^^ Doesn't that throw away content in the LFE channel above 50 or 60 Hz?
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post #9 of 9 Old 02-16-2013, 11:58 AM
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^^ Doesn't that throw away content in the LFE channel above 50 or 60 Hz?
It would, if there were any LFE in the system. But the Yamaha A-S500 is a 2-ch integrated amplifier that only understands analog stereo sources.

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