1st REW sweep....... Now What?

[Maceo23]

Well, I mad emy first sweep, and I'm not sure where I need to make my adjustment, so I was hoping for a little direction from the pros. As far as REW is concerned, it tells me I have no peaks, but I sure have some nulls.

[brucek]

First thing to do is change the graph axis to the standard of:

Vertical axis = 45dB-105dB
Horizontal axis = 15Hz-200Hz

The Graph axis button is in the top right corner of REW....

brucek

[DrWho]

How big is your room? And how loud was your measurement when you took it? I suppose another good question is what gear are you running and what are all your settings?

A plot of just the subs and just the mains would be helpful too.

[Maceo23]

Thanks for the replies guys.
My Equiptment:
Marantz SR7500
Ascend CMT-340 LCR
Phase Tech Teatro dipole rears
300L Tempest X Sonotube
Dayton HPSA 1000 Rack Mount Amp
BFD DSP1124

I have a dedicated room that is roughly 12x15 with 10 foot ceilings. I readjusted the axis settings, here is the new graph. I have the level adjusted to 75db.

[brucek]

I have the level adjusted to 75db

Doesn't really seem that way..... no matter, you can recalibrate the target level and REW SPL meter and it will be fine next time.

Either way, you do indeed have some decent dips there. Have you tried moving your sub tube around to different locations (easier said than done I suppose)..... maybe move it once to your listening position and walk the microphone around using RTA mode to find a superior position.

BTW, do your testing with the sub only (mains off). Add the mains only when you're satisfied with the sub..

brucek

[Maceo23]

Well, I finally had time to get back to tinkering. As far a moving the sub, its unfortunately not an option at the moment, unless I decide to rebuild, so I'm hoping to get it woking in its current location. I readjusted my levels, and here is what I came up with. It looks pretty flat, but I'm a little concered about the boost I needed to add at the low end. Take a look and let me know what yall think.

Thanks

[Wayne A. Pflughaupt]

What kind of sub are we talking about here?

Regards,
Wayne