i used a btl for about 2 years, then a nightshade for a month or two, then the trf now.
the btl, nightshade, and trf all are right about the same in a direct swap with this box. I'm sure if i put them on a TL some each woofer would be a hair louder or quiter at particular frequencies....but for the most part to the ear they all wang hard as hell and sound great on music in my box. The TRF seems be a little louder around 40hz-50hz, but everything else on the low lows and upper lows seems abot the same. There wasnt a drastic output difference between the 3, which make sense as they're all incredible pieces of equipment. Having the TRF is nice being able to say i have a 4in vc in there //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif There's plenty of room for cooling on the TRF motor/basket so im sure its taking the daily abuse quite well...it was just a major pain in my *** to mount. i had to wedge wood under the lip of it to hold it up in place, while using one foot to hold the bottom of the basket pressed against the box , and two hands on the drill... its sooooo much heavier than the other woofers.
