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New member Username: Knox21Washington, PA USA Post Number: 1 Registered: Oct-08 | Me and my roommate have just wired his 2 12' Audiobahn flame series subs in our room. We are using a 1800w Pioneer amp, and a 250w computer power supply. It works just fine but we don't get much kick out of the system. When we exceed certain volumes the power supply cuts out and the subs stop working. I know the problem is that we need more power but my question is, we have just purchased a 750w PSU and we were wondering if it was possible to wire the 2 PSU's in a certain way as to raise the power to 1000w? We will take any advice anyone is willing to offer. Thank you |
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Silver Member Username: JrbayLivonia [Detroit area], Michigan USA Post Number: 461 Registered: Feb-08 | From: http://club.cdfreaks.com/f7/wire-dual-power-supplies-together-one-motherboard-11 1640/ ***WARNING*** connecting two power supplies together may cause serious damage to the power supplies and the equipment that they are connected to. Connecting two power supplies so that their regulated voltages are connected to each other, is BAD. Background) Most power supplies use one circuit to power one transformer to make all of the various output voltages. Then, one output voltage (usually the +5Vdc) feeds back to tell the input side of the transformer what to do. The other output voltages are controlled by their relationship to the feedback voltage. (They come off the same transformer using different windings) [very over-simplified] So, the input side of the power supply regulates itself to make the regulated voltage come out right; and the other voltages drift according to what is happening to the regulated voltage. Problem) If the two different power supply regulated voltages are connected to each other, they will make the power supplies unstable. Lets say PSU 1 regulates it's +5 line to +5.015 volts. Let's say PSU 2 regulates it's +5 line to +5.013 volts. If the two regulated voltages are spliced together, PSU 1 will pull all the load off PSU 2 by pushing the +5V to +5.015 vdc. It's other voltages (+12V, -5 V, -12V and +3.3V) will go high. PSU 2 will reduce it's output to bring the +5V down to +5.013 vdc. PSU 2's other voltages will also go low. The motherboard and other devices will be caught in the middle of the conflict. Real power supply sharing systems use extra circuits to prevent PSU 1 from affecting PSU 2 and vice versa. Don't do it. Your hardware will thank you. |