The RCA subwoofer output on a preamp is going to be ever so slightly out of sync with the amp’s speaker outputs. When your subwoofer is on the high-level input, it’s seeing exactly the same signal as your speakers, with no timing differences at all. The sub is just seeing a signal and amplifying it. An active subwoofer presents a very high impedance load, so the amp doesn’t work any harder when you connect one, two, or even a line-array of six subs to it. With this method, the subwoofer connects to the back of your amp exactly where you plug in your speakers.Don’t worry, the subwoofer will not draw power from your amp. The preferred method works even if a preamp doesn’t have special subwoofer or preamp outputs, however, you do need a subwoofer that can accept a “high level” (also called “speaker level”) input. In spite of the name, a ‘subwoofer out’ isn’t the best way to connect a subwoofer to a quality music system. (This also means that you can connect a power amplifier to the subwoofer output, but don’t depend on this being true of your particular make and model.) 1 or the LFE output (low-frequency effects).īut what about stereo systems? How do you connect a subwoofer, and should you? Some stereo amps and preamps have a “subwoofer out” which is usually just a preamp output, meaning it’s a regular full-bandwidth line-level signal that relies on the subwoofer’s crossover to decide how much high-frequency information the sub will throw away, and how much low-frequency information it will keep. In fact, home-cinema subwoofers are given their own channel, called the. Why you should add a subwoofer even if you don’t have a preamp/subwoofer outĭo subwoofers belong in music? We’re used to seeing subwoofers in home-cinema systems, and multichannel preamps and processors nearly always have a subwoofer out. Note, if you are asking about products we don't sell, we may not know enough about them to offer definitive advice. LFE/.1 uses a single RCA cable (Home-theater receiver's "LFE/.1 out" -> sub's LFE/.1 input). Low-level uses an RCA interconnect pair (amp's "pre out" or "sub out" -> sub's low-level input). We often have to look up images of the back of the unit to be able to help you.ģ) What type and number of cables are you wanting to connect? A high-level interconnect is almost like speaker cable (amp's speaker terminals -> sub's high-level input). Please send us the following information:ġ) Are you connecting the sub for movies or music? Both?Ģ) What is the exact brand and model of your amp and your subwoofer? It is impossible to offer connection advice without knowing exactly what is being connected. If you have questions about connecting your amp to your subwoofer. There are many subs out there, and many ways to connect them. We get a lot of "can I connect my sub to my amp" questions that don't give us any information at all on the products being asked about. Also note that while we want to help everybody, we may not be able to respond if we don't know the products you are asking about. If you have questions about your amp and sub, PLEASE MENTION THE BRAND AND MODEL.
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