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Crossover frequency NO sub

post #1 of 10
11/18/07 at 4:46am
Thread Starter 
Not quite sure if this belongs in the Amp section, but I feel it relates to the speakers more. Here are my questions, and my equipment.

Fronts: Infinity Alpha 50's
Center: Infinity Alpha 37C
Rear: Infinity Primus 150's

I do not have a sub hooked up.

I have set my receiver to a 5.0 setup, and have set all of the other speakers except the fronts to small. What is a good crossover frequency for this. I currently have it set at 80hz. I ask for the purpose of knowing which setting will provide the best sound and bass from my speakers. Seeing as how my fronts can handle the bass more accurately, would a higher setting provide this? In case anyone is interested, my receiver is a Sony 2100ES.

Thanks for any input.
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post #2 of 10
11/18/07 at 5:33am
I would say 80hz. Definately play with it a little, but as you start going over 80hz, it becomes easier to localise the bass. I.E. - you hear a rocket explode in the back of your room, but hear the bass part of the explosion in the front.

Bass below 80 hz is hard for most people to localize, 80-120 is kind of a grey area (some hear it, some dont) above 120 most people can localize the bass.

Off the cuff I would say keep it at 80 or maybe even move it lower depending on how low your other speakers will play. (I am not familiar with them) I usually stay 1 crossover setting above what the speakers will play (or there-bouts) If your crossover settings are 40-60-80-100-120 and your speakers will play down to 60, set the crossover at 80. If your speakers play down to 80, try the crossover at 100 and see if you can localize the bass.

Michael
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post #3 of 10
11/18/07 at 5:48am
Thread Starter 
Quote:
Originally Posted by McLoki View Post

I would say 80hz. Definately play with it a little, but as you start going over 80hz, it becomes easier to localise the bass. I.E. - you hear a rocket explode in the back of your room, but hear the bass part of the explosion in the front.

Bass below 80 hz is hard for most people to localize, 80-120 is kind of a grey area (some hear it, some dont) above 120 most people can localize the bass.

Off the cuff I would say keep it at 80 or maybe even move it lower depending on how low your other speakers will play. (I am not familiar with them) I usually stay 1 crossover setting above what the speakers will play (or there-bouts) If your crossover settings are 40-60-80-100-120 and your speakers will play down to 60, set the crossover at 80. If your speakers play down to 80, try the crossover at 100 and see if you can localize the bass.

Michael


Thanks for the reply McLoki. To give you a better idea, i'll include the speakers range.

Alpha 50 fronts: 35-22000hz
Alpha Center: 45-22000 hz
Primus Rear: 58-20000 hz
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post #4 of 10
11/18/07 at 6:05am
Quote:
Originally Posted by DamageMcRamage View Post

Thanks for the reply McLoki. To give you a better idea, i'll include the speakers range.

Alpha 50 fronts: 35-22000hz
Alpha Center: 45-22000 hz
Primus Rear: 58-20000 hz

If you can set multiple crossovers, I would try the center at 60hz and the rears at 80. If not - I would just set the entire thing to 80.

Definately move the crossover up and down by one from the recommended settings and see if it happens to work better at another setting, but that is where I would start anyway.
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post #5 of 10
11/18/07 at 7:18am
If you have no sub why would you not set the crossover to the lowest your speakers can handle? I am no expert but this seams as if it would give you the fullest sound available.
Maybe some of the more educated can chime in. At worse it just won't sound good and you can go with the higher setting.
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post #6 of 10
11/18/07 at 7:49am
Can you just set the speakers to large, no sub in your processor and experiment from there?
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post #7 of 10
11/18/07 at 9:52am
setting a crossover without a sub makes no sense.
You should be setting all speakers to large, so they get the full signal.
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post #8 of 10
11/18/07 at 9:56am
I would not set all speakers to large.

I would set the front/main speakers to large and set the center and surrounds to small with 80Hz crossover for starters.

Be sure the subwoofer setting is disabled / turned off.
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post #9 of 10
11/19/07 at 6:32am
Thread Starter 
Quote:
Originally Posted by whoaru99 View Post

I would not set all speakers to large.

I would set the front/main speakers to large and set the center and surrounds to small with 80Hz crossover for starters.

Be sure the subwoofer setting is disabled / turned off.

A lot of differing opinions on this, but what you have written, I have basically done. The only difference is that I have the crossover set at 70hz.
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post #10 of 10
11/19/07 at 6:38am
Thread Starter 
Quote:
Originally Posted by davidpa View Post

setting a crossover without a sub makes no sense.
You should be setting all speakers to large, so they get the full signal.

davidpa, it does make sense. I don't want my center (although it's beefy) or my surrounds to be trying to handle the bass my fronts can more easily accomplish. Using the logic you've written could be applied to a subwoofer as well...why set a crossover for a sub when you can also let your other speakers have a full signal? I'll admit I'm still relatively a noob compared to some of the people on this forum, but it seems important, at least to me, to choose a crossover setting that allows the strongest link in your audio chain to handle the bass. In this case, that would be my fronts, as I don't have a subwoofer yet.
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