good enough w/o BFD?

[rkruz]

I did some room placement and added some heavy long spiked feet to the subwoofer so it now pokes through the carpet and firmly hits the cement slab. Just doing that made a big improvement. Do you think the performance in plot attached is good enough? Or should I still try and get the BFD to work? BFD is currently outputting noise to subwoofer whenever its filters are active and thats a definite nogo if I cannot correct that. BTW this is a Definitive 350W Model 1500 Ive had about 10 years.

Your thoughts appreciated!

[brucek]

Do you think the performance in plot attached is good enough?

No, it needs filtering.....

Normally we use a vertical scale of 45dB to 105dB (and a horizontal of 20Hz to 200Hz).

brucek

[rkruz]

brucek wrote:

No, it needs filtering.....

Normally we use a vertical scale of 45dB to 105dB (and a horizontal of 20Hz to 200Hz).

brucek

Ok here is the correct scaling. I can see that it would help to normalize comparisons.
The suck out at 70 is untreatable as you mention in the REQ. I probably goes even deeper then shown if I used a finer measurement increment. The others are treatable and I have applied the BFD but the noise in induces is unacceptable. During the test the noise even modulates the test signal. It sounds to me like processing noise as comes and goes and changes pitch...its not a constant hum. And when I turn off al the filter or go to a another factory present, the noise stops.

I wish I would have saved the graph before even adding the spike feet and playing with room placement. This one looks glorius in comparison.

thanks again!

[Wayne A. Pflughaupt]

rkruse,

No reason to be concerned with the 70 Hz problem. It’s so narrow it’ll be inaudible. Probably not much you can do about it anyway.

As far as the noise, sounds pretty strange, but if it goes away with another preset, then that’s an easy fix. Is your incoming signal level high enough? Your output is really low. That might be the problem.

Regards,
Wayne

[rkruz]

Wayne A. Pflughaupt wrote:

rkruse,

No reason to be concerned with the 70 Hz problem. It’s so narrow it’ll be inaudible. Probably not much you can do about it anyway.

As far as the noise, sounds pretty strange, but if it goes away with another preset, then that’s an easy fix. Is your incoming signal level high enough? Your output is really low. That might be the problem.

Regards,
Wayne

Yea. I understand on the 70hz. It doesn got away with another preset. It only goes away if there are no parametric filters in the present. So when I go to factory default the noise stops. If i turn off all the parametrics in a preset, the noise stops. If I bypass the filters using front panel in/out, the noise stops. Ill try to put together some info and audio and post so you can hear what Im trying to explain not very well.

thanks again.

[brucek]

You're explaining it very well.

The BFD outputs no noise in any of those conditions you mentioned.

The only situation I could think that would result in what you observe might be an already existing noise on the input that is exacerbated by a filter with a lot of gain at that specific frequency. I doubt that's the case here and can be checked by removing the input cable............

brucek