audio set-up for beginners [continued]

[ealdree]

*ealdree

If I were to recommend an installer in Laguna, look for Reo at 2MC Audio (2MC Audio | Facebook). I'm not too sure if he still remembers me though

I cannot comment on your installation since it maybe alright but it may also still be in tatters. Why I usually recommend more well-known installers is because although they're more pricey in their services, you get that assurance that they get the basics correctly. At the very least, I have not heard a well-known installer have a project car go up in flames *cough* shots fired *cough*.

If you're changing an amplifier to a higher wattage one just because of heat, that's utterly wrong logic. The higher wattage you go, the more heat it emits as a byproduct of power conversion. Case to point: a 100W incandescent bulb emits more heat than a 50W incandescent.

What your installer is probably subtly telling you is that you need more power because of your subwoofer. If you're pushing it too hard, you might also be clipping the amplifier accidentally and this is bad for your speakers (it's the #1 speaker killer). Also partially because he wants to push you to a sale (it's their business after all, no harm in that). If I were to recommend, purchase a mono amplifier and make sure it's Class D in topology.

Brief Lesson:
Class AB -> 50-60% efficient -> aka, feed it 100W, 50-40W of energy is emitted as heat
Class D -> 90+% efficient -> aka, I am always cool to touch

Your Firland speakers do not need more power. In fact, feed it 50W and a lot of speakers are already happy. I usually tell enthusiasts that exceeding more than 100W is kind-of pointless.

Because of two reasons:
(1) Again, power is exponential. To make 50W sound TWICE as loud, you need 500W of power.
(2) Most speaker components cannot handle high power. Their voice coil might burn out (mechanical stress) and distortion increases dramatically the hotter you go (because heat affects magnetism)

thanks again jhnkvn. i am learning a lot from you bro. if i am to purchase class d mono amp, will this replace my existing kd80.4 amp? or the mono amp for my sub and my kd80.4 for my seps?