Dahlquist Subwoofer installation

a) 4 squares for your L and R speakers (In)
- if they look like you could put speaker cables into each one, then that is 2 (red and black) from your left preamp speaker out; and 2 (red and black) from your right preamp speaker out
b) 4 squares for your L and R speakers (Out)
- these are for speaker cables from your sub to your speakers (again black and red each for L & R speaker)

c) 2 RCA inputs (female) listed as L and R under the heading: Low Level In

- You can alternatively use a subwoofer output from your preamp (if it has one) using regular RCA interconnects into your sub
d) An on/off knob for Crossover Frequency. the minimum reading is 50, and the maximum reading is 150.

- this allows you to blend your sub with your main speakers...it will either cut off the sub (or your speakers) frequency response. You will know within a couple seconds/minutes which it is. IF you crank the reading to 150, that means you are either: playing your sub up to 150hz (high bass), or cutting off your main speakers from playing below 150hz. If you crank the knob down to 50hz, then either your sub is playing only up to 50z (mid bass) or you are cutting off your speakers below this level.
e) one very small switch that is under the heading "Phase"
(when the switch is in the "up" position, it is on 0, and when it is in the "down" position, it is on 180.
- Phase is 0 degrees to 180 degrees...relates to the 'pulse' of the bass wave...if you are out of phase with your main speakers, you might cancel some of their bass...if you are 'in phase' you will reinforce it.

Best way to tell...start with 0 and keep turning...stop when bass is at its strongest...reinforcing the wave. if you need to be out of phase (too much bass), you can either turn it down, or leave it...and reverse your speaker leads. Believe it or not, reversing your speaker cables (black/red to red/black) will invert phase 180 degrees.
f) another very small switch that is under the heading LFE. this is an on/off switch
- If you leave it on, it should allow the sub to automatically activate when it senses a low frequency effect (LFE) coming from your preamp. Please double-check this in your manual.
g) a volume control knob
- self-evident

Post any further questions...i did this kinda fast, so understand if not 100% clear. Good luck.

Hi - Correction - I think on LFE, that may be the direct input from a surround sound processor that is sending out video-track LFE - Low Frequency Effects - again pls double check in your manual.

thanks for the info. I did all that you said, but now I am wondering if the sub even works. I hooked all the speakers up by running them through the sub, and all the speakers work, but the sub does not work. Remember, I am trying to play this with an intergrated amplifier. (I have tried both my Marantz 4270 and my Pioneer SX-1250.) Neither of these has a "subwoofer" outlet. Do I need some sort of Pre-Amp?

Hi R...

if the sound signal is running thru the sub and then from the sub into your speakers...then the sub is [partly] operating otherwise the signal would not carry thru the sub to your speakers.

However, i think you may need to check that the sub itself is playing bass. To keep life simple...

...focus on making sure the RCA-outs from your integrated (OR the speaker outs from your integrated) are correctly connected to the sub.

....Crank the sub and see if ANY bass comes out of it. Play with sub volume (turn it up)...and play with crossover...does any bass or music come thru at all?