low pass crossover

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theetimurban

Copper - Posts: 126

Joined: December 30, 2007

Location: South Carolina, United States

Posted: February 13, 2008 at 12:40 AM / IP Logged

i already know the answer to this question, but my little brother won't stop fighting with me about it, so i'm asking people with a lot more experience, and phrasing this as unbiased as possible:

true or false? an amp with a low-pass crossover of 50-150hz will play no frequencies lower than 50hz...

i'm hoping people that really know what they're talking about will answer, and throw in a why.

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jmelton86

Gold - Posts: 1,228

Joined: February 07, 2007

Location: South Carolina, United States

Posted: February 13, 2008 at 1:37 AM / IP Logged

False. The amp will amplify frequencies below 50Hz, but no higher than 50-150Hz (if the low-pass filter in turned 'on').

2013 Kia Rio -90a alternator

DDX470HD GTO14001 GTO1014D (x3)

Big3 in 1/0G

1/0G to GTO14001

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audioman2007

Copper - Posts: 580

Joined: February 20, 2007

Location: United States

Posted: February 21, 2008 at 8:37 PM / IP Logged

That is correct jmelton but the crossover wont do a solid cut at 50Hz. Depending on how steep the crossover slope is, some frequencies above 50 will still come into play but wont be amplified as much.

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audioman2007

Copper - Posts: 580

Joined: February 20, 2007

Location: United States

Posted: February 21, 2008 at 8:41 PM / IP Logged

I totally read that wrong. What I meant is that some frequencies slightly above the crossover will still be heard but wont be amplied as much. Meaning if the crossover is set to 130HZ, frequencies a few above will still be heard somewhat, but a higher crossover slope means the amp will do a better job of cutting those "unwanted" frequencies out.

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jmelton86

Gold - Posts: 1,228

Joined: February 07, 2007

Location: South Carolina, United States

Posted: February 21, 2008 at 9:12 PM / IP Logged

True. I just didn't want to get into all that. Just wanted to answer his question. low pass crossover -- posted image.

2013 Kia Rio -90a alternator

DDX470HD GTO14001 GTO1014D (x3)

Big3 in 1/0G

1/0G to GTO14001

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theetimurban

Copper - Posts: 126

Joined: December 30, 2007

Location: South Carolina, United States

Posted: February 22, 2008 at 5:42 AM / IP Logged

Yeah, no it was fine. I don't know where he got the idea, but he thought that because it said "low-pass crossover 50-250hz" he thought it meant it would only play 50-250hz. to which I said, "then why can you adjust it?" then he just became a little brother and started fighting with me, even though he knew he was wrong.

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low pass crossover

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