I built my DB's a year or so ago...  and when I tuned them,  I just used music and set the slider where I liked the sound.... That's not a very scientific way, but it worked.   The DB has been in my house for a year and I've had a DB12 in my car for 3 years.   Today I got to test my house DB... hooray.

http://binkster.net/extras.shtml

There's a nice free test CD you can make yourself.
The driver I used has an FS of 30hz...  so I didn't think I'd go any lower...... Surprisingly,  the 25hz tone is barely audible,  but the stuff in my room vibrating says it's definately there.  The 20hz tone moves a few things too.   the 31.5hz tone makes things dance on the tables,  and the 50HZ tone gets really big and shakes up the place.    The test CD gets things moving more than my music tests did.   I'm surprised to get the response below 30Hz,  but the response above 30hz is dynamite.... and that's where most of the music is anyway. Just if you were wondering,  I used the Dayton Quattro 10" Sub....  a bargain at 65$

Hope you all find it useful.   I'm busy making PA speakers now.  There's lots of great designs online if you just know where to look.   Why buy when you can build?

[quote author=VexorgTR  link=1168198769/0#0 date=1168195169]I built my DB's a year or so ago...  and when I tuned them,  I just used music and set the slider where I liked the sound.... That's not a very scientific way, but it worked.   The DB has been in my house for a year and I've had a DB12 in my car for 3 years.   Today I got to test my house DB... hooray.

http://binkster.net/extras.shtml

There's a nice free test CD you can make yourself.

Which PA plans are you looking at?
The driver I used has an FS of 30hz...  so I didn't think I'd go any lower...... Surprisingly,  the 25hz tone is barely audible,  but the stuff in my room vibrating says it's definately there.  The 20hz tone moves a few things too.   the 31.5hz tone makes things dance on the tables,  and the 50HZ tone gets really big and shakes up the place.    The test CD gets things moving more than my music tests did.   I'm surprised to get the response below 30Hz,  but the response above 30hz is dynamite.... and that's where most of the music is anyway. Just if you were wondering,  I used the Dayton Quattro 10" Sub....  a bargain at 65$

Hope you all find it useful.   I'm busy making PA speakers now.  There's lots of great designs online if you just know where to look.   Why buy when you can build? [/quote]

Brash? Which model are you considering? I use DR250's and T48's. I havn't really heard any brashness, but I'll check again