Hello, everyone. I'm new to these forums, and don't know much about car audio, but I do know my electronics pretty well. Hopefully I won't be too much of a noob.
I have a '98 Mitsubishi Eclipse, with a new (low-end) Alpine head unit. Pre-outs run to an old 4-channel Alpine amp which was factory tested to deliver 62W RMS per channel. That is driving stock components up front and MB Quart RKC116 co-ax's in the back. The Alpine amp pre-outs were going to a piddly little Kenwood 25W x 2 amp which was pushing two 10" Crossfire2 subs in a sealed box. I know... I know.
Well, now the Kenwood's right channel is crazy, just sending static, so I bought a crappy little Sony Explode or whatever, 50W x 2 amp, and the input sensitivity doesn't have to be quite as low, but still lower than what I think the line voltage really is. I'm just guessing that the line voltage is 1V, because my head unit doesn't advertise the "4V pre-out" like some Alpines do. I wish I had an oscilloscope for quick testing of stuff like this.
So anywho, I would like to get a new 2-channel amp for these crappy subs, and I'm guessing I need about 100 - 150 W RMS per channel to get the sound I want. I don't need retarded bass, since I'm not trying to go deaf, or impress people from 2 blocks away. I just want a good, clean, balanced sound. Also, the Eclipse is like a bass cannon on wheels, so I don't think I need a whole lot of power.
I would like to be able to run the input sensitivity greater than what the line voltage really is, and from what I hear this just means you're not using the full amplification, and your amps tend to run cooler and last a bit longer this way.
The Kenwood was being run at an input sensitivity of about 0.2V, which I'm sure was causing a lot of signal clipping, but I wasn't able to tell from the sound. I've never had proper subs hooked up in my car, so I dunno. The Sony amp seems to make the same amount of noise at an input sensitivity of about 0.5V. All this would lead me back to the assumption that an amp rated at 100W RMS per channel would do the trick, but I think I'd like to get a 150 W / channel just to be sure.
Okay, that's all for me. If I'm heading in the wrong direction with any of this thinking, please don't hesitate to correct me. I'm here to learn right now. So, anyone got an amp in mind that would do well in this situation? Thanks in advance for any help!