Looking at the graph with the Broadband DSP and the M80v3 I looks to improve bottom end to the same point as the M80v4.
Actually, the graph looks to be better than the m80v4.

I am wondering if it be better to purchase the DSP at $750 than upgrading at a cost of $1100 ?

Also, just wondering if this DSP goes inline inbetween my Reciever and my external amp. There are no pics of the rear. Not sure how it connects


Anthem MRX520
M5HPv4
VP160HPv4
QS10v4