Sub woofer phase and placement
Friends, could you just help me out with a few querries
1. In my Integrated amp Yamaha AX-596 there is no dedicated subwoofer out. I was adviced to use the 'rec out' output port to connect the sub. Is this is the best way out or is there some better method?
2. My Sonodyne sub has a phase control toggle switch with two possible positions of 0 and 180 degrees. what and how do choose between the two? whats the science behind this phase control?
3. What would be the best way to place a sub in a relatively small room for a 100w/c amp, specially when the room is a bit too furniture clutered and has a tendency to produce lingering boom in the music. I have a pair of sonodyne floorstanders and a sub?
One thought leads to another !
Quote:
Originally Posted by skeptic
Using the rec out will not work well at all. This is because this output is deliberately NOT controlled by the main volume control So if you use it, the subwoofer will play at the same volume while the main speakers will play at a different volume depending on where you set the volume control. In other words, the relative volume of the subwoofer and main speakers will not remain proportional. You have a couple of alternatives.
First of all Thank you for explaining the whole science so lucidly - Skeptic.
Quote:
Originally Posted by skeptic
First, most subwoofers have speaker inputs. Connect the left and right speaker outputs from your integrated amp to the speaker input terminals on the subwoofer and connect the speaker outputs on the subwoofer to your main speakers. Be sure to maintain the correct polarity for all of the wires. Also be careful not to short circuit anything either. I assume your subwoofer has a built in amplifier.
Well, yes the subwoofer has a built in amplifier but then there is a difference in all power ratings so i dont know how is that going to impact the final output. The main speakers are rated at 80W @ 4ohms. The Amp outlet is rated 100W/C @ 8ohms. The powered sub is rated at 100W @ 8ohms. How are these ratings going to affect the output clarity if the above method is used. The connectors are different for main speakers and the subwoofer output. My location does not allow me to get good quality connectors here - or even lousy ones for few months atleast - so how does one tackle that?
Quote:
You have one other option. If your intgrated amp has a preamp out/power amp in with jumpers, you can forgo the outboard preamp and accomplish the same thing with just Y adaptors and an extra set of jumpers.
Could you just explain the preamp out/poweramp in with jumpers thing. How does one work out the connections? besides the amplifier manual says "When you use this unit as a power amp , connect the output terminals of an external control amplifier to this units main in terminals. In this case, this units controls will not function. Use controls on external amp to make volume adjustments.". Will the sub be able to give the same level of output to the main speakers as the main amp? I still dont get which of the two amps is going to control the show? who will be finally outputiing the sound - the integrated amp or the powered woofer?