Is this a good bass response? - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 4 Old 06-26-2020, 07:43 AM - Thread Starter
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Is this a good bass response?

I see a lot of folks posting these awesome looking, flat curves going well below 20hz and just wondered how I was doing. I have two Rythmik FV25HP's.
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post #2 of 4 Old 06-26-2020, 08:14 AM
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Not bad at all to my untrained eye.
You may get more knowledgeable opinions, and certainly more views if you ask in the subwoofer forum, which is way more active than this one.
https://www.avsforum.com/forum/113-s...s-transducers/

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Originally Posted by mitchlampert View Post
I see a lot of folks posting these awesome looking, flat curves going well below 20hz and just wondered how I was doing. I have two Rythmik FV25HP's.
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post #3 of 4 Old 06-26-2020, 09:00 AM
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Hi,

Looks fine, a lot of graphs are using smoothing which hides quite a bit. So for bass response graphs its common to use zero smoothing to see each little problem.

You really only have one issue, and it's that 22hz null that is pretty obvious. The rest are modes and are fine and can be EQ'd to be flat. Nulls cannot be fixed with EQ or anything. That's dependent on placement in room relative to listening position(s). Since you have TWO subs running, the goal is to move them until that null goes away. You should be able to move the subs around a little and watch that null move. As long as one sub is covering up the null from another sub, the perceived response will be flat at the listening position. So move your subs a little and re-measure until that null is gone.

Very best,
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post #4 of 4 Old 06-26-2020, 07:03 PM
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Quote:
Originally Posted by MalVeauX View Post
Hi,

Looks fine, a lot of graphs are using smoothing which hides quite a bit. So for bass response graphs its common to use zero smoothing to see each little problem.

You really only have one issue, and it's that 22hz null that is pretty obvious. The rest are modes and are fine and can be EQ'd to be flat. Nulls cannot be fixed with EQ or anything. That's dependent on placement in room relative to listening position(s). Since you have TWO subs running, the goal is to move them until that null goes away. You should be able to move the subs around a little and watch that null move. As long as one sub is covering up the null from another sub, the perceived response will be flat at the listening position. So move your subs a little and re-measure until that null is gone.

Very best,
There aren't any nulls in that graph!

See my graphs for what a null looks like (first graph green line has a null at 50Hz), and all 4 subs have a null around 115Hz. Post EQ graph shows what can and cannot be fixed with EQ alone. These aren't smoothed at all either. The only thing I did wrong was label the initial graph after working 14hrs, then re-arranging the room, and doing sweeps when I was tired and couldn't tell colors apart anymore.
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