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Car Audio Equipment
Subwoofers
Enclosed Box for DD Subwoofers?
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<blockquote data-quote="jonathanengr1" data-source="post: 7350816" data-attributes="member: 633698"><p>Holy cow... doing more searching, I found a calculator at diyaudioandvideo and it has a calculator to determine sealed and ported box sizes based on the speaker specifications (VAS, fs, Qts, etc.). Putting in the values from the DD site resulted in a rec'd sealed box size of 0.4 cf, and a ported box size of 0.82 cf. They also have a "sealed or ported" calculator where you put in speaker specifications (Fs and Qes) and it tells you whether the speaker is best when sealed, ported or either. The 500 series fell into the range of "either", almost right in the middle but a nudge towards ported. The rest of the DD subs fell waaaay into the "ported" realm. Maybe the 500 series, being the low-end of their speakers, would do well ported?</p><p></p><p>I'm trying to learn here and am grasping at straws. I would very much appreciate someone telling me if I'm somewhat on the right track here. I'll def test the subs with the new amp, but the old one seemed to work pretty well (until it blew!). I'm not holding out much hope that the other one will make it sound better at low freq's.</p><p></p><p>Either way, can someone tell me if all of the calcs I'm seeing and using online are making sense? As for the speaker, here are the specs for the 510b:</p><p></p><p>Model 510b</p><p></p><p>Voice Coil Diameter 2.0"</p><p></p><p>Magnet Weight 90 oz</p><p></p><p>Power Handling RMS/Peak 300/1200</p><p></p><p>Suspension Travel 50 mm</p><p></p><p>Nominal Impedance 4.0 Ohm</p><p></p><p>DC Resistance 3.4 Ohm</p><p></p><p>Rec Box (cubic ft) 1.5</p><p></p><p>Port Area (sq in) 24</p><p></p><p>Port Length (inches) 23</p><p></p><p>Woofer Diameter 10"</p><p></p><p>Free Air Resonance 38 Hz</p><p></p><p>Qts 0.405</p><p></p><p>Qes 0.461</p><p></p><p>Qms 3.29</p><p></p><p>Vas 23L</p><p></p><p>Sensitivity 86.5 dB</p><p></p><p>Shipping Weight 13 lbs</p></blockquote><p></p>
[QUOTE="jonathanengr1, post: 7350816, member: 633698"] Holy cow... doing more searching, I found a calculator at diyaudioandvideo and it has a calculator to determine sealed and ported box sizes based on the speaker specifications (VAS, fs, Qts, etc.). Putting in the values from the DD site resulted in a rec'd sealed box size of 0.4 cf, and a ported box size of 0.82 cf. They also have a "sealed or ported" calculator where you put in speaker specifications (Fs and Qes) and it tells you whether the speaker is best when sealed, ported or either. The 500 series fell into the range of "either", almost right in the middle but a nudge towards ported. The rest of the DD subs fell waaaay into the "ported" realm. Maybe the 500 series, being the low-end of their speakers, would do well ported? I'm trying to learn here and am grasping at straws. I would very much appreciate someone telling me if I'm somewhat on the right track here. I'll def test the subs with the new amp, but the old one seemed to work pretty well (until it blew!). I'm not holding out much hope that the other one will make it sound better at low freq's. Either way, can someone tell me if all of the calcs I'm seeing and using online are making sense? As for the speaker, here are the specs for the 510b: Model 510b Voice Coil Diameter 2.0" Magnet Weight 90 oz Power Handling RMS/Peak 300/1200 Suspension Travel 50 mm Nominal Impedance 4.0 Ohm DC Resistance 3.4 Ohm Rec Box (cubic ft) 1.5 Port Area (sq in) 24 Port Length (inches) 23 Woofer Diameter 10" Free Air Resonance 38 Hz Qts 0.405 Qes 0.461 Qms 3.29 Vas 23L Sensitivity 86.5 dB Shipping Weight 13 lbs [/QUOTE]
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Enclosed Box for DD Subwoofers?
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