I have a Tascam US1641 USB interface and wanted to know if you can connect a Behringer 2442fx to it to use it as a mixdown control for my music in Cubase studio5.

Faders are 10 K

Here: http://elektrotanya.com/behringer_ub2442fx-pro_sm.pdf/download.html
Scroll down to "get manual" and click to download. IGNORE other download links.

http://elektrotanya.com/behringer_xenyx_2442fx_sch.pdf/download.html

Scroll down to "get manual" click to download. Ignore other download links.

First, connect the USB audio interface which came with the Xenyx to a USB port on the PC. Then connect the TAPE OUT from the Xenyx to the IN of the USB audio interface. And connect the OUT of the USB audio interface to the TAPE IN of the Xenyx. You should now be able to record from any of the Xenyx channels. To listen back, engage the control room button which reads CD/TAPE. Contact me if you need any clarification.

you need a cable with two A3F  XLR s going to a 1/8" stereo phone plug, male. plug the XLRs into the Main out L&R on the mixer. plug the 1/8" into the LINE Input on the laptop. You should be able to get the cable from any music store,or Radio Shack. below is a link to the manual,in case you don't have one. Good Luck!

http://www.behringer.com/assets/1622FX_P0557_M_EN.pdf 

You need to either connect it using a MIDI interface card and cables from the PC or you can use a RS232 serial cable which may be hard to find for your PC. It appears to use the 7 wire RS232 type connector at the mixer board end. You can get USB to MIDI converter devices from several sources.

You will have to have an amplifeir between them since the PV12M is an unpowered speaker. The Xenyx 2442FX is likewise an unpowered mixer meaning it cannot directely drive a speaker. You will wire with a balanced line (TRS cable) between the 2442 and the amp and then from the amp to the speaker using a speaker type cable.

We don't have any graphic means of diagramming. You also don't say if this is for recording or playing or both. Assuming it is both, your best way would be to get two 1/8 stereo cables that split into two RCA plugs. Go from the headphone out of the DR1 to the CD inout jacks on the mixer. Then with the second cable go from teh CD out jacks of the mixer to the line in of the DR1.

hook it up to one of the aux output sends (1 or 2), and use the corresponding aux send knob per channel to put each channel necesarry into the monitor signal.

If you want to record in stereo, the quick and dirty way is to get a 1/4 inch stereo to 1/8 inch plug cable and go frrom the headphone output jack. (Use a Wye connector if you need to listen on the phones)

All the other outs are TRS and XLR balanced and the computer audio (mic) inputs are unbalanced. You would need special cables to connect those.