Originally Posted by lilmike2069
I will say the stock amp did 'seem' to be slightly more powerful. The difference may not be noticeable in normal operation though and with a more reputable/reliable amp, I'd feel more comfortable running it 'hotter' than I used to with the stock amps. On stock amp I never went above 75% onboard nor above -3db on sub out on receiver. I'll also say the increased low end extension could
also be in part due to the effectively larger cabinet. By taking the guts of the amp out of the enclosure, I've effectively increased the internal size since the volume occupied by the amp can now be occupied by air. Generally, a larger cabinet will result in a lower tune (at least to an extent). Either way, I'm happy with the results
Congratulations on the successful upgrade. I'm glad to read that the Crown amp is able to drive your Empire down to the frequency you hoped for. The reason I am posting is that I was originally considering a crown amp but was scared off because all posts on AVS saying that Crowns run out of gas below 50hz and brick wall at 20hz. The REW sweeps you posted look like they contradict both arguments. I spoke with the owner of a reputable local custom pro/home audio shop who swears by Crown and mentioned that he has had great results with their TXI line driving single or duel home subs. He recommended the TXI line because of the advanced EQ and DSP capability. In short, I want a pro amp under $500 with enough power to drive dual Legends into the mid 20 hz range without premature clipping. I know that compact sealed subs require eq boost to maximize their sub 40 hz performance, so I will need parametric eq.
That leaves me with a choice between the Crown XTI2-1002 ($499). Vs the Behrinenger Inuke 3000DSP ($399). The Inuke seems to be more powerful, and is used heavily by the DIY sub crowd, However, the Crown is the more reputable brand, doesn't seem to need a fan modification, (say goodbye to the Inuke warranty) and I like that my local dealer will be there to support me before and after the sale.
Maybe I'm over thinking this.