Hi, at the moment I am using my amp32 with a 4ohm 6.5" car speaker with a sensitivity of 92db. The audio source is from my iphone and it is being powered by an 11.1v lipo battery. However, it is not quite as loud as i want it to be. Therefore to make it louder I thought getting a more efficient speaker would work because I heard that increasing the speaker sensitivity by 3db is the equivalent of turning up an amplifier up twice as much. Parts express has several highly efficient 6.5" speakers.
This speaker: http://www.parts-express.com/pe/show...number=290-682 has a sensitivity of 99.8db, however its impedance is 8ohm. I was wondering if the higher impedance would effect how loud the speaker would be by a significant amount, and if this speaker should be louder than my current speaker? What is the more important factor: speaker impedance or sensitivity when considering volume?
There is also this speaker: http://www.parts-express.com/pe/show...umber=292-2584 however it has an impedance of 3ohms, would the amp32 be able to cope with that low impedance and if not, would adding a 1ohm resistor help? If anyone knows of any other 6.5" highly efficient and quite slim speakers I would really appreciate it.
Another way of making the amplifier louder would be to add a preamplifier, however what is the maximum audio input the amp32 can handle?
Is there is any other way of making the amp louder without changing the power supply?
Thanks, any advice would be very helpful