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<blockquote data-quote="N2Audio" data-source="post: 2106914" data-attributes="member: 746989">The issue is power.USUALLY the surround sound amp only drives the fronts, center and surround speakers and the sub will have its own small amplifier that is mounted to the enclosure.If your processor DOES have power for a sub you can be sure it is very little power and the old sub was probably designed to produce some usable output with that low power.Being a 250w sub your new pioneer is probably going to need at least 100w rms to come to life.Check Partsexpress.com for &quot;plate amplifiers&quot;.&nbsp; These are amps that bolt to your enclosure and operate a lot like an external car amplifier.&nbsp; You plug the amp into the wall, you plug an rca subwoofer signal cable from the receiver to the amp and the back side of the amp has speaker leads that connect to the woofer.I recently built my own home sub to replace my little 30w Jensen 5.25&quot; sub I bought several years ago.&nbsp; The new sub is 1100w rms driven with a 500w (Bash 500s) amp.&nbsp; It produces clean output into the mid 20hz range at SPL levels I&#039;m afraid will eventually vibrate pictures off the walls and mantle.</blockquote>

[QUOTE="N2Audio, post: 2106914, member: 746989"] The issue is power. USUALLY the surround sound amp only drives the fronts, center and surround speakers and the sub will have its own small amplifier that is mounted to the enclosure. If your processor DOES have power for a sub you can be sure it is very little power and the old sub was probably designed to produce some usable output with that low power. Being a 250w sub your new pioneer is probably going to need at least 100w rms to come to life. Check Partsexpress.com for "plate amplifiers". These are amps that bolt to your enclosure and operate a lot like an external car amplifier. You plug the amp into the wall, you plug an rca subwoofer signal cable from the receiver to the amp and the back side of the amp has speaker leads that connect to the woofer. I recently built my own home sub to replace my little 30w Jensen 5.25" sub I bought several years ago. The new sub is 1100w rms driven with a 500w (Bash 500s) amp. It produces clean output into the mid 20hz range at SPL levels I'm afraid will eventually vibrate pictures off the walls and mantle. [/QUOTE]

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