ASR Mini Basis Output Impedance ?

I have looked online as deeply as I humanly could, yet was still unable to find the output impedance of the ASR Mini Basis phono stage. I am naturally aware of the load settings for this piece yet I want to drive my amp directly with this phono as my amp has a volume pot, yet my tech said the pairs success at mating could largely be a question of the output impedance of the phono stage, so if anyone has info regarding this, please pass it on I will be forever grateful. Thank you, Andrew