BillFitzmaurice.info

Nice.

But putting in the wires and tscrews for the wheels had been easier without the last side panel on

finaly started on number two

the experiences from the first buld helps a lot and makes things go together a lot faster without getting glue everywhere. Just have to wait on the panels to dry and continue tomorrow if time permits.

Almost getting there.

Just need the mouth stiffening and last side plate, Hope that will be less work then last time

A question because I'm not sure if I'm seeing things right but in the last image, the panel marked P5, does it have a rectangular hole in it?

88h88 wrote: ↑Mon Sep 09, 2019 9:22 am A question because I'm not sure if I'm seeing things right but in the last image, the panel marked P5, does it have a rectangular hole in it?

Probably has two rectangular holes in it. That's used with drivers other than the Lab12....or any driver with FS above 35hz. I can't tell what driver that is, but it doesn't look like a Lab 12.

It has a hole, the driver is a eighteensound nlw9300 http://www.eighteensound.com/en/product ... /12NLW9300

So rather light compared to a lab 12

Bruce Weldy wrote: ↑Mon Sep 09, 2019 9:35 am Probably has two rectangular holes in it. That's used with drivers other than the Lab12....or any driver with FS above 35hz. I can't tell what driver that is, but it doesn't look like a Lab 12.

Gotcha, I've never put anything other than a Lab12 in a sub so I wasn't aware of any differences in the plans!

88h88 wrote: ↑Mon Sep 09, 2019 12:26 pm

Bruce Weldy wrote: ↑Mon Sep 09, 2019 9:35 am Probably has two rectangular holes in it. That's used with drivers other than the Lab12....or any driver with FS above 35hz. I can't tell what driver that is, but it doesn't look like a Lab 12.

Gotcha, I've never put anything other than a Lab12 in a sub so I wasn't aware of any differences in the plans!

I saw that hole in the pic too.....after you posted, I went and looked at the plans. Not sure why people want to use the Lab when the 3012LF is so much lighter and the same price....and the output is essentially the same. Just like to get in some extra weightlifting?

They weren't always the same price.

Bruce Weldy wrote: ↑Mon Sep 09, 2019 7:05 pm Not sure why people want to use the Lab when the 3012LF is so much lighter and the same price....and the output is essentially the same.

I thought the Lab had about 5dB more sensitivity at the high pass freq. If true, seems worth the extra weight for someone that plans to use it that low regularly. If untrue... hey look, it's the Goodyear Blimp

SethRocksYou wrote: ↑Tue Sep 10, 2019 12:08 am

Bruce Weldy wrote: ↑Mon Sep 09, 2019 7:05 pm Not sure why people want to use the Lab when the 3012LF is so much lighter and the same price....and the output is essentially the same.

I thought the Lab had about 5dB more sensitivity at the high pass freq. If true, seems worth the extra weight for someone that plans to use it that low regularly. If untrue... hey look, it's the Goodyear Blimp

Somewhere, IIRC, Bill says the T30 and the T45 response are essentially identical, and it's the design that dictates response, not the driver.
There is one lab12 chart in which it appears it has greater output, but time and time again, Bill has responded that it is because of different impedance, so 1W/1m is skewed compared to the 3012lf.

Because of it's impedance, the lab12 wins by 1 maybe 2 dB in output.

3012lf is king...

Grant Bunter wrote: ↑Tue Sep 10, 2019 1:59 am Because of it's impedance, the lab12 wins by 1 maybe 2 dB in output.

3012lf is king...

3012lf Vd = 496 cc
Lab12 Vd = 659 cc

At least 2 db's, probably closer to 2.3

Bruce Weldy wrote: ↑Mon Sep 09, 2019 7:05 pm I saw that hole in the pic too.....after you posted, I went and looked at the plans. Not sure why people want to use the Lab when the 3012LF is so much lighter and the same price...

When I bought the Lab12s back in 2011 the 3012s were at least another 50% on top in the UK. Now both are the same money here (give or take like £3) so it doesn't make real sense to buy the heavier Lab.