DIY Movie Sub

[Macca]

Thanks for the suggestions - I'll review the bass drivers tomorrow in the sober light of day and see what I will go for.

Mark I think enthusiasm has got the better of you - you forgot I am using an existing cab so the chimney ports are not going to happen -this time...

[Reid Malenfant]

Hey i didn't suggest it

What you really need to do is find out the internal enclosure volume. Once you know that then look for a driver that'll give you the best performance with what you have.

Never buy a driver & then work out what enclosure it needs as it often ends in tears

[Macca]

Mark

It's been a long time since I last designed and built speakers...what I did back then was to buy the bass-mid drivers and use the Thiel-Small parameters to work out the optimum cabinet volume for the bass response I wanted, then I built (with some asisstance as I am pretty cack-handed) the cabs to suit. I figured this was the optimum way of doing things.

With this sub I am already starting with the cab so I need a driver to suit. I would estimate the cab is about 100 litres. As this is not a music sub - it just need sto reproduce deep bas effects for movie soundtrack replay, my thinking is that I can be a little more cavalier in terms of parameters.

What say you?

[Reid Malenfant]

Well yes, but wouldn't it be better to get some synergy between the driver & cab?

If you can find out the exact volume then we can predict what any driver will do in the enclosure, tuning can be tweaked etc. At about 100L the Lab 12 is still looking like a prime contender right now though

[Macca]

Well yes, but wouldn't it be better to get some synergy between the driver & cab?

If you can find out the exact volume then we can predict what any driver will do in the enclosure, tuning can be tweaked etc. At about 100L the Lab 12 is still looking like a prime contender right now though

Okay that makes sense. Later I will get the cab down and measure it, maybe take a piccy and post it up to give more of an idea.