Hello Rob,
Congratulations with your new Beocenter. I would suggest you to get the amplifier of the unit fixed for best performance and better user value. You can use the phones output, I use it myself for interconnecting Beomasters and it actually sounds fine.
A more technical solution is to use an RCA cable and take the output from the preamplifier through the "tape record/line Out" plugs. This will bypass the Equalizer and volume control.
The Beocenter 2200 is japanese made and not of the best quality, I have owned a 2100 which is pretty much the same, without the turntable. The amplifier is average, and loudness is always on, as far as I could remember. It is a fine entry B&O model which might as well could have been in a different case and have a "Sony" or "JVC" bagde on it.
Beocenter 9300, Beogam CD50, Beocord 5500, Beomaster 3400, Beomaster 4400, 2 Beogram 4000, Beomaster 8000, 2 beogram 8002, Beovox S-75, Beovox MS150.2, Beovox RL6000, Beovox S-35, Beomaster 6000, 2 Beocord 9000, Beocord 8004, Beocord 5000, Form 1, 2x Beolink 1000, Beo4, MX3500, LS4500. Born 1993.