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Message: <blockquote data-quote="Dafaseles" data-source="post: 8760032" data-attributes="member: 681482">So, in my opinion, sorry, but that's the wrong amplifier for subs. Usually a mono amplifier for subwoofers will have a HPF (high pass filter) or subsonic filter (essentially the same thing) and a LPF (low pass filter), so you can set both for a single channel. The LPF will only let frequencies below the set frequency play (at "full blast" for lack of a better term). The HPF or subsonic filter will do the opposite, only let frequencies above the set value play (at full blast). This essentially protects your subwoofers from over exerting themselves. If a subwoofer plays to high of a frequency, that can damage it (or just sound like crap) and also playing too low of a frequency can also damage it. Usually, for subs, the simple setup is setting your LPF at 80 hz, and your HPF a half an octave below the tuning of the box port (if the port is tuned to 30 hz, half of 30 is 15, that's a full octave. Half of 15 is, 7.5 so let's just say 8. 15+8=23. 23 would be half an octave below 30 hz). Or on a sealed enclosure, just set the HPF around 20-25 hz. The human ear can't hear below 20 hz anyway. If you insist on using that amplifier (though I recommend you get a dedicated subwoofer amplifier) with those subs (the picture says they are dual 4 ohm), you can do 1 of 2 things. Wire them both together in series/ parallel for a 4 ohm final load, or wire then separately in parallel for each to have a 2 ohm load (I recommend this style for ease). I'll put pictures at the bottom. If you wire them together for a final 4 ohm load, you can bridge the two channels on the amplifier and get your power that way. To bridge you would take the positive wire from the subs and input it into the positive terminal on channel 3, then the negative wire for the subs, input it into the negative terminal for channel 4. Wiring them each to have a final 2 ohm load you would just wire them each into their own channel like you would any speaker. Either way, you'd get about the same amount of output. With that amplifier, for the sub channels, I recommend switching the crossover to LPF and setting it to around 80 hz. As far as your amplifier getting hot, how do you have it wired now? It could be an electrical issue, or a grounding issue, could be a subwoofer/ speaker wiring issue.... could be a lot of things. Knowing exactly how you have it hooked up now would be beneficial to troubleshooting that issue.</blockquote>

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