Originally Posted by FOH
I came here with a lot of experience in the pro audio world.
Perhaps you're underestimating what it takes for reference level playback of the LFE spec (3hz-120hz), including all redirected bass management. Not too many fully grasp what a system is facing to achieve ref levels and cover the spec.
Hit 120dB plus peaks at the LP. Be mindful of the EL curves and audibility threshold of LF/ULF. Our hearing just does not stop at a certain point, it just requires much greater SPL to achieve audibility. Remember, loudness, and sound pressure are entirely different and frequency and level dependent.
About 20hz, 75dB is needed for audibility. At about 16Hz, 85dB is needed. At 10Hz, about 100dB SPL, and an octave lower at 5hz, audibility threshold is about 110dBSPL.
Consider a sub system with a given performance SPL level at a given frequency. Now, every octave lower requires a quadrupling of like powered drivers to maintain a certain dBSPL. This elevates system requirements incredibly, when merely attempting to cover the LFE spec at reference level. Thus, you see the high power 8 driver (on up) sub systems. Myself, I've got four 18s, four 15s. Add in LT EQ'ing, to properly shape the response of a small sealed box, the power requirement climb significantly.
High performance HT is another world from performance pro audio.
Obviously, I'm nowhere near as serious about HT as you guys.
A JBL MPX1200 powering a 2x15" sub, and 4x satellites, is about as serious as I get with HT.. Probably sacrilege in these parts, but I have neighbors..
Joined this forum as this thread is "probably" the most informative on the web.. Cash is itching in the pockets, waiting to take plunge..
I'll be using the amp to provide sub for 400-600 people, at events with DJs, and absolutely cannot afford for sub to disappear, and be replaced with burning smell, and magic smoke escaping from the amp..
So I'll sit tight and monitor things for a little while longer.
Originally Posted by notnyt
This again? FP14000 or go home.
Seeing as I'm a newbie here (but not on other forums
, care to explain that !?
Been a while since I read the complete thread, is there something relevant I missed?
IIRC, The FP14000 differs only in 2 ohm rating to the FP13000, and as we're talking Chinese cheapie here, would only be trusting that at 4 ohms on sub, with my very expensive 18" pro audio drivers.Edited by levyte357 - 1/9/13 at 5:48pm