Originally Posted by tebling
Going to look at a used S2 tomorrow! This would be my first JTR sub (replacing a MFW-15 SS Turbo), and would be paired with my Single 8HT-LP front stage. I believe it was bought new in early 2015. Have there been any significant changes to the S2 since then? Any common points of failure I should be alert to, such as evidence that the amp has been pushed too hard?
Based on the Data Bass test of the S2 the 4kW amp was found to run out of steam a little before the drivers, so a pretty robust configuration, that's hard to "break".
I believe the only thing you would miss out on is: "New DSP: Auto input select, advanced auto turn on & even lower noise floor".
I haven't seen the lower noise floor described, only mentioned on the JTR site.
Edit to add, based on Jim Wilsons review of the 2016 S1, the 2015 model is probably using the older style SpeakerPower amp with Powercon input and exposed heatsinks:
"What the amp doesn't have is the ability to do any tweaking or fine tuning. There is no manual adjustment for phase, LPF, power mode (on/off/auto), crossover, nothing. There's an on/off switch, an XLR input, Speakon power connector and two push buttons, both of which are inactive."
He also mentions the 2016 S1 is a little bigger in size overall compared to the 2015 (couple inches) .