I think whatever you upgrade first will always offer you the highest in returns for your investment regardless of it being the speaker or the amp. I am not speaking in terms of diminishing returns. Rather, the first swapped component will always have the most drastic change in sound quality compared to what you have been used to.
So, I will assume had you swapped out the amp first before your got new speakers, you might claim your speakers are very high on returns on investment and not the amp. But, maybe upgrading amps just isn't very high ROI in your system...
So, I will assume had you swapped out the amp first before your got new speakers, you might claim your speakers are very high on returns on investment and not the amp. But, maybe upgrading amps just isn't very high ROI in your system...