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New member Username: Pierre1958Post Number: 2 Registered: Oct-07 | Nad c325BEE integrated amp x SVS 16-46 PCI subwoofer with a pair of Polk Audio RT35i speakers. http://nadelectronics.com/img/resampled/060619152549-1200-C325BEE_rear.jpg http://www.svsound.com/products/subs/pci-features/sub_pci_amp.jpg http://www.polkaudio.com/homeaudio/products/rt35i/ What is the best way of connecting these so I can get good cut-off at 80 Hz and best performance? OR. How do I split the amplification load most efficiently between the NAD and the SVS? |
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New member Username: Pierre1958Post Number: 3 Registered: Oct-07 | I'm asking the question because cannot test it. I don't have the subwoofer yet, but will buy it soon. I just want to make sure that it is going to work well with my amp and speakers. |
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New member Username: Pierre1958Post Number: 4 Registered: Oct-07 | I guess no-one thinks it is a valid question ... well I have thought about it and I think this is the answer for the benefit of someone else whose mind configures like mine, and who still enjoys plain old stereo sound: Run +/- (black/red) rca cables from the pre-out plugs on the Nad to the low-level input plugs on the SVS and run rca cables from the low-level output plugs on the SVS to the main input plugs on the Nad. How does it work? Running the rca plugs from the pre-out without running it back into the main-ins, cuts all power from the amp's low-level speaker outputs. Your stereo speakers won't work. The SVS-subwoofer has a filter which splits the low-level (rca) signal into high and low frequency. The point at which the split occurs is called "the variable low pass crossover frequency," and it is typically set at 80 hz. You can set it anywhere from 40-120 hz on the SVS 16-46 pci - using the cross-over knob on the subwoofer. The subwoofer amp amplifies the low frequency portion of the rca-signal, playing it on its driver, and sends the high frequencies back to the stereo amp through the amp's mains inputs, and the amp amplifies the narrower bandwidth signal to be used by the speakers. This generally means that the amp has less work to do driving a smaller dynamic range or narrower frequency bandwidth, (only above 80 hz), and can drive the speakers more strongly, while the subwoofer amplifies and drives the low frequencies (below 80 hz). By the way, low frequency signals take more power to amplify than high-frequency signals, so this setup, apart from the subwoofer extending bass to much lower frequencies, also dramatically increases the quality and quantity of sound coming from the stereo speakers. Is this correct? |
