Oswaldo Rayburn: Im guessing it drops voltage mostly on the long notes, the cap is for quick recovery dumping hundreds of amps a seconded but it has to be supply'd with enough to charge it back up fast enough, i would recommend a battery with a charger.
Dulcie Edis: amps x volts = watts. An 11 amp, 12v power supply can only support about 100 watts, assuming the amp is 75% efficient. The Pyramid supply should get you close, but you can save money and get a lot more power if you look hard enough.
Darrel Stele: 150W divided by 80% efficiency divided by 13.8V = 13.6 amps. if it's a class A/B amp, the efficiency is about 50%, so it would require more (21.7 amps). the amount of amperage required to keep it charged is a fraction more than the amperage it is discharging. power caps will discharge immediately, and they don't hold much power to begin with, so you are left with whatever amperage your charger provides. you'd be far better off with an actual battery, ! but having both may be (slightly) better. a 1Farad power cap can provide your amp with 12volts for less than one second before needing to be recharged, and then your charger has to not only charge the cap, but also power your amp. at that point, the cap isn't helping. even a little lawn mower battery would hold 12V for 1000x longer than a power cap. car audio amplifiers are cheap, but you have to spend a lot to make them work well in your home. in the long run, it's far less expensive to simply get a cheap stereo amplifier, or a plate amp if it's for a sub (Dayton Audio makes some cheap ones)....Show more
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