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<blockquote data-quote="DDFrontier" data-source="post: 2672775" data-attributes="member: 574164">I have two Pioneer 8&quot; subwoofers (model TS-W203C 4 ohm) in a sealed enclosure.&nbsp; Pioneer recommends 0.5 cubic feet of airspace per subwoofer.&nbsp; I have them in a small sealed box with 0.9 cubic feet of shared airspace (no divider).&nbsp; The subs sound fine at most frequencies, but struggle when going down low and sometimes sound &#039;boomy&#039;.&nbsp; I know this is a characteristic of such a small subwoofer, but does the box being too small contribute to this?&nbsp; Can I add some polyfill to the box to &#039;trick&#039; the subs into performing like the box was built to specs?&nbsp; If so, how much do I add?They are powered by a Total Mobile Audio T500.1 amp running at 500W x 1 into 2 ohms.&nbsp; (the subwoofers are wired in parallel)I e-mailed Pioneer technical support and this is the seemingly uneducated response:&quot;I have two TS-W203C 8&quot; subwoofers in a sealed enclosure sharing a commoninternal volume of 0.9 cubic feet.&nbsp; The subs are 4 ohm wired in parallel to an ampdelivering 500W x 1 into 2 ohm (250W RMSper sub).&nbsp; This particular subwoofer requires 0.5 cubic feet of volume each.&nbsp; That&#039;sa total volume requirement of 1.0 cubic feet.&nbsp; So, my enclosure is 0.1 cubic feettoo small.&nbsp; Should I addpolyfill to the enclosure to &#039;trick&#039; the subs into thinking the enclosure&nbsp; isbigger?&nbsp; If so, how much do I add?&quot;Pioneer&#039;s response - &quot;Thank you for contacting Pioneer Electronics, Inc.No, that is a wrong idea about adding a insolation.&nbsp; It make the box volume smaller.You may want to have a box with two chambers.&nbsp; The subwoofer work well in it.Thank You,KhammyCustomer Service RepresentativeThanks for your help.</blockquote>

[QUOTE="DDFrontier, post: 2672775, member: 574164"] I have two Pioneer 8" subwoofers (model TS-W203C 4 ohm) in a sealed enclosure. Pioneer recommends 0.5 cubic feet of airspace per subwoofer. I have them in a small sealed box with 0.9 cubic feet of shared airspace (no divider). The subs sound fine at most frequencies, but struggle when going down low and sometimes sound 'boomy'. I know this is a characteristic of such a small subwoofer, but does the box being too small contribute to this? Can I add some polyfill to the box to 'trick' the subs into performing like the box was built to specs? If so, how much do I add? They are powered by a Total Mobile Audio T500.1 amp running at 500W x 1 into 2 ohms. (the subwoofers are wired in parallel) I e-mailed Pioneer technical support and this is the seemingly uneducated response: "I have two TS-W203C 8" subwoofers in a sealed enclosure sharing a common internal volume of 0.9 cubic feet. The subs are 4 ohm wired in parallel to an amp delivering 500W x 1 into 2 ohm (250W RMS per sub). This particular subwoofer requires 0.5 cubic feet of volume each. That's a total volume requirement of 1.0 cubic feet. So, my enclosure is 0.1 cubic feet too small. Should I add polyfill to the enclosure to 'trick' the subs into thinking the enclosure is bigger? If so, how much do I add?" Pioneer's response - "Thank you for contacting Pioneer Electronics, Inc. No, that is a wrong idea about adding a insolation. It make the box volume smaller. You may want to have a box with two chambers. The subwoofer work well in it. Thank You, Khammy Customer Service Representative Thanks for your help. [/QUOTE]

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