Sub 20Hz EQ

[Malice]

With the 1124SP specification at 20Hz -3db, I presume sub 20Hz EQ is a

I've been thinking about an upgrade to a PB12Plus/2 and tuning it for 16Hz because I appear to have significant room gain below 30Hz so a drop in overall SPL for a 16Hz tune would not have a significant effect IMO.

However, if my room gain < 20Hz is significant (> 10db) will I run into trouble with EQ on a sub that is producing a response below the BFD's lower operating spec?

[brucek]

The response of a BFD is quite good actually.

Here's the response of my unit using REW Vers 4.




brucek

[Malice]

Marvellous! Looks fine to me!

[DrWho]

So what's the lowest frequency filter you can employ on the BFD?

[brucek]

So what's the lowest frequency filter you can employ on the BFD?

20Hz center frequency..............

[Malice]

So not much good for taming a 16Hz peak which is greater than a 20Hz peak.

So, I think my the opening question is still valid! We're stuffed below 20Hz?

[brucek]

We're stuffed below 20Hz?

Well, why not and see what the response is.... then you can decide.

brucek

[Hakka]

You could always use a wide filter centered at 20hz to cut the 16hz peak, and then add a narrower filter at maybe 25hz to pull the 20hz are back to where it was.


Hakka.

[Sonnie]

If you really have a problem, you could always look for a used Rane PE17. It will reach down to 10Hz.

[cyberbri]

I don't see how a big rise below 20Hz is a problem, as long as it's room gain and not artificial boosting. The lower you go, the more dB it takes for the signal to be noticeable. So low frequency boosts from room gain should be welcome. I have my sub eq'd flat to 30Hz, where most bass found in music lies, with some small cuts below 30Hz to tame the rise centered around 22Hz. But the peak is still pretty good, which sounds great with movies and video games, and that occasional music track that extends that deep.