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ajhockett 6th April 2010 08:05 AM

My transmission line subs 4-21"
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these are based on the legend of "el pipe o". post any questions u have

salzburgsoundsystem 6th April 2010 09:44 AM

Which frequency range are you covering with the subs?
Just curious as to how high and low they go in your setup. Do the drivers need a high pass to prevent over-excursion?

How are you avoiding constructive/destructive intererence between subs?

Regards, Ben

ajhockett 6th April 2010 04:28 PM

the tubes are 10.5 feet with 30lbs of stuffing in each. I dont need a lowpass on these, they will take a 10 - 16hz wave at full power. They are placed very accurately in their space, that helps with any losses. I normally pop my 30amp circuit breaker before i would any excursion issues.

BP1Fanatic 6th April 2010 07:49 PM


ajhockett 6th April 2010 10:55 PM

here are some videos of the massive energy they put out

ajhockett 6th April 2010 11:04 PM

I use them in this system with a butterworth 24db low pass set at 110hz

Cal Weldon 6th April 2010 11:32 PM


Originally Posted by ajhockett (
post any questions u have

Ya, just one...

Can I come over?

ajhockett 6th April 2010 11:35 PM

im happy to have anyone over to have a listen

Cal Weldon 6th April 2010 11:37 PM

We live in different countries so I might have to bring a sleeping bag.

freddi 6th April 2010 11:42 PM

which 21"?

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