subwoofer for my 4Pi [message #47922] |
Sun, 09 October 2005 16:41 |
jshoc
Messages: 23 Registered: May 2009
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Chancellor |
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I have been enjoying my 4Pi's over the past year, and think that it might be time to complement them with a subwoofer. My 4Pi's are ruffly 6.5 cu.ft., with PSD2002 and Delta Pro 15s tuned I think to 42Hz. I don't have time to build a subwoofer so I was thinking about a commercial unit. Would I adjust the port length of my 4Pi - and tune it to a higher frequency - perhaps 150Hz (is this possible). Or do I modify the crossover so the cutoff for the Delta Pro is higher? Hakn
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Re: You've got mail! [message #48016 is a reply to message #47936] |
Sun, 16 October 2005 08:43 |
jshoc
Messages: 23 Registered: May 2009
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Chancellor |
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Thanks for the plans Wayne! Next challenge is trying to get the right audio synergies.. The 15in Delta Pros in my 4 Pi Towers (JLapaire - tune to 42Hz) in comparison to the LAB 12 have a difference in sensitivity by more that 10dBs. In a 3.5ft3 enclosure (ported) I would have to apply lots of power at the LAB 12 - something like a QSC RMX1450(900 Watts Bridged Mono into 8ohms) or RMX2450 (1200 Watts Bridged Mono into 8ohms)- Lab 12 is a 6 ohm speaker. Will this work? So I don't overlap the low end - I would high-pass the signal going to the Lab 12 at 125Hz (? - thinking out loud). Alternatively - I could use a plate amp. Using the line level inputs and outputs, which will remove the bass from your Delta Pro 15in drivers. Adjust the level controls to match. I would prefer using the Pro-amp approach with high-pass, as I want to leave the 4 Pi's alone - they sound great! Haknhendrix Sr.
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