Originally Posted by luv2fly3
I just got my platforms hooked up last night. I'm not 100% done, but did have a chance to try them. Not sure I have things quite right as the feel wasn't all I expected. Maybe my expectations are too high, or some tweaking is needed. My main question is how do I know if I'm driving the JBL drivers (CX1200s) too hard? I don't want to damage them, but felt like I had more power to add if I could safely do it, either with the attenuators on the Amp or more gain. My Amp is a Crown K1 and I'm running 4 of the JBLs in series/parallel for a 4 ohm total load per row. That Amp has a max out to 4ohms in stereo of 550watts or so (manual states 550 watts is maximum average power in watts.) So if my calculations are right, that would mean about 137 or so watts per driver max. I know that is more than the suggested 80 so I did keep the gain and amp back a bit. Maybe I'm just not pushing them hard enough? Just don't know how to tell how much is too much? I'm just a bit ignorant when it comes to wattage, gain and driver capabilities.
luv2fly3.....Thanks for the details. Your math above is correct...about 137 watts RMS for each of the 4 JBL's which is more than enough for a BOSS alignment (open baffle).
I'd recommend playing some of your favorite full bandwidth bass demo material and just watch the drivers during those scenes. You should see quite a bit of cone movement during the scenes that are hitting low. Keep adjusting the gain upwards to increase the movement and if you start to hear strange sounds during some of the real heavy scenes, just back the gain down a bit and listen again. Then, listen to a few more favorite bass demo scenes to ensure there's no unusual noises. If there is, back the gain down a bit more.
Once you get things dialed in, you shouldn't have to mess with the gain any more.
As far as performance, if you followed the guidelines in Post 29, the experience should be immediately pleasing.....a natural and commanding ULF experience into the single digits. If it's not a pleasing experience, I'd suggest changing the polarity (phase) of the BOSS platform as prescribed in Post 29. Try it both in phase and out of phase. You should notice a big difference and one will feel much more natural and commanding than the other.
If that still doesn't work, I'd suggest posting a picture of your setup or describing your BOSS setup some more and we can help troubleshoot from there.
Hope this helps.