Help with the setup of my new MicroPro 4000

dcuz383

I now have my new MP4K Subwoofer and have a few questions maybe you guys can help with.

1. Layout. My HT is in one section of my great room (no walls). The overall size is 30' x 27' with a vaulted ceiling. The HT setup is using half of it. Basically three of the walls. The center and towers are 13' from the seating position. The rear centers are 11.5' from the seating position. My old sub PWS505 set up front next to the left tower in the corner of the room. My intent is to place the new 4K there and the 505 14' down the side wall in line seating position.

2. Hookup. Should I go with two subs? If so should I use the LFE and a splitter? Or line level? I have ran dedicated 20 amp 120 volt outlets for each of the subs, should I plug directly to the outlet or into a power conditioner first?

3. Positioning. Which way should I face the subs? And How close to walls should they be? I bought a piece of 1 1/4" thick marble 27" x 17" to sit the 4K on. How high should adjust the feet on this sub?

4. Phase. Should they be in phase or 180 degrees out from one another?

Your input is greatly appreciated.

Eric W

1) We really do not recommend mixing 2 different models of subs within the same airspace. You would want to use only one model of sub, not two. Because of different tuning and frequency response characteristics, at some points the subs' output will add to one another and combine. At other points they'll cancel each other out, resulting in uneven frequency response.

2) 2 subs (of the SAME model) are generally better then one. You'll get smoother response throughout the room and greater acoustic output capability, particularly in a large room like yours. You can use a splitter to split the LFE output from the receiver/preamp processor. Power conditioning is up to you.

3) Face the sub so that the woofer is not firing directly into the wall. Otherwise, it really doesn't matter. The height of the sub really won't matter either unless you're talking several feet.

4) The phase you're just going to have to play with. The MicroPro actually has a 4 position phase control. Put some music on that has a repetitive but "walking" bass line. Jazz, country, latin and some dance music is good for this.
Listen closely at where the subwoofer transitions to the main speakers (this is the upper bass, lower midbass region).
Try out all 4 of the phase settings, listening closely at whichever setting sounds the loudest or fullest (from your primary listening position) is the correct setting.

You may have to retweak the volume of the sub as you're doing this.