How to Bi-amp Pre-amp with only 1 set of XLR out

Here are five of them, with varying lengths and prices:

http://www.bhphotovideo.com/c/product/134134-REG/Comprehensive_XLRJ_2XLRP_3_Pin_XLR_Female_to.html#features

http://www.bhphotovideo.com/c/product/252312-REG/Hosa_Technology_YXM_121_XLR_Female_to_2.html#features

http://www.bhphotovideo.com/c/product/469387-REG/Monster_Cable_600444_XLR_Female_to_2.html

http://www.bhphotovideo.com/c/product/134966-REG/Pro_Co_Sound_YMXF2XM_1_XLR_Female_to_2.html

http://www.bhphotovideo.com/c/product/287222-REG/Remote_Audio_CAX3YMMF_3_Pin_XLR_Female_to.html#features

I think that the only way you could get into trouble would be if the combined (paralleled) input impedances of the two power amps were not high enough in relation to the preamp output impedance. I couldn't find specs on the power amp input impedances, but the 502 and G02 have very low 47 ohm output impedances, so it would seem unimaginable that you would have a problem in that regard.

-- Al

Although of course you'll have a problem with different volumes being put out by the two power amps if their gains don't match. And they probably don't, considering their different power ratings.

Regards,
-- Al

The 502 is also 47 ohms out -- you can see that here:

http://www.meridian-audio.com/data/502.pdf

Assuming the 559 is 32K in, like the G57, you would have 47 ohms working into 16K, which is certainly fine, and even if the 559 were as low as 10K you would still be fine.

And since they are saying that the gains of the two power amps are the same, you are good to go!

Regards,
-- Al