I have listened to 15 ips and 30 ips courtesy of my great uncle. 15 ips sounded better than 30 ips on the low end for sure. They both exaggerated the high end and the tone control did a pretty good job of controlling that. But as I turned up the gain, upper midrange and the high end went to $h!t. Frankly I don't know why that was - it stumped me - maybe the old but wise one knows. smile

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated