If your subs are 4ohm impedence. You won't gain any power. If they are 8ohm impedence than it would be beneficial to you to bridge the amp. Most bridgeable amps have markings indicating one of the positive terminals from one channel and the negative from the other channel to be used to bridge the amp. But check the impedence of your subs first. If you bridge the amp the power is divided between the two subs. So you would still only get 125w a sub. But if the subs are 4ohm impedence. And you run them parallel to the amp. You might end up making your amp go into protection constantly unless it can handle a 2ohm mono load.
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