2 x Jack 112 Lite

[Bruce Weldy]

. You can still see a bit of wood grain through the texture in places,

Did you put down a primer coat of flat black paint first?

[Charles Jenkinson]

No. I followed the duratex blurb, that it takes to bare wood and doesnt need, and adheres best without, a primer. I thought a primer was used for achieving colour density and minimal duratex coats, not grain filling.

Ok Grant. My preference is toward lighter texture. I'm a bit of a softy, for a northerner.

[Bruce Weldy]

No. I followed the duratex blurb, that it takes to bare wood and doesnt need, and adheres best without, a primer. I thought a primer was used for achieving colour density and minimal duratex coats, not grain filling.

.

The reason for the primer is to seal the wood with a cheap paint, so that the expensive duratex sits on top and doesn't soak into the wood.

Oh, and the duratex adheres just fine to the paint.

I imagine that the reason you got grain bleed is that you put the first coats on smooth. It's the "bumps" and "dimples" made with the proper roller that hides the grain. The flatter the surface, the more the grain will show. With only one textured coat, the bleed is still noticeable.

Of course, the type of plywood surface has something to do with it. BB has very little grain and is easier to hide.

[Grant Bunter]

Ok Grant. My preference is toward lighter texture. I'm a bit of a softy, for a northerner.

It's interesting you say that.
When I first used my textured roller I was thinking "what have I done?". Within 30 minutes the peaks had settled down, to like maybe a quarter of the size they started at.
My cabs final finish is described (by the better half) as "lightly textured"

Oh, and harden up lad lol...

[Charles Jenkinson]

I'm between a rock and a hard place here. On the one side, its a lightish texture that matches throughout the whole cab, but has a bit of grain bleed. And on the other side, doing another textured coat throughout the whole cab including inner horn flares right up to the baffle in the hope of a more uniform coating in general and no grain bleed. I'll never know if i don't go for the extra coat, its just gonna be an hour a cab to get that on! I dont know how the guys do these commercially.

[Bill Fitzmaurice]

With Birch, Poplar and Arauco if you have grain bleed you just don't have a thick enough coating of DuraTex. With most other softwood species it's very difficult to get rid of it.

[Charles Jenkinson]

Much better this time. I can at least announce one myth of using a textured roller: that using one for a second or probably even a third layer doesn't give more texture if one keeps rolling the paint out.

[Grant Bunter]

That's looking great Charles

[sine143]

lighter rolls equal more texture. heavier hand equals more orangepeel texture imo.

[Charles Jenkinson]

Pillow stuffing: I gotta deal with this sooner rather than later now, or it could turn round and bite me on the you know what. I have 2 used pillows - a representative photo of the stuffing below. My conviction is that i cannot use this stuffing because its been washed too many times due to juvenile bed wetting, and 2 pillows wont be enough for 2 jack 12's. Do ppl concur? I'm not to the cost of some pillow stuffing, though as has been pointed out previously i may have over budgeted for it, ...then these freebies came along. It was a quandary waiting to happen.

Do people 'retain' their pillow stuffing in the horn sides with anything?

[Charles Jenkinson]

Result!: the stuffing from one pillow does one jack 12. The stuffing from the second pillow was less lumpy, so I mixed and matched to leave a big piece adjacent to the back chamber. Even the lumpy stuff doesn't pull apart easy - a couple of thin strands will hold a loose glob, so as long as the stuff stays globally in the horn sides I cant imagine any migrating blobs, even though its a pretty harsh environment for a bit of fluff.

Onto the internal wiring nearly - If i think about it from a mechanical point of view it aint so bad.

[Charles Jenkinson]

It gets better, for this evenings output. Decided to do foam damping before internal fitout.

I've pondered numerous times over the years on the effect on bass reflex volume that acoustic foam or damping in general has. Does it have any effect? Because obviously we have lost the volume from the horns aswell, having filled them with pillow fibre.

[Bill Fitzmaurice]

Does it have any effect?

No. Whatever box volume is lost is compensated for by lowering of Q. With reflex designs too much damping will lower Q too much, that's why only a light filling is recommended when polyfill is used.

[Charles Jenkinson]

I have to confess I did not see this one coming. Gonna need smaller diameter rubber feet, something 20mm ideal, 23 max. if i file a bit of the corner protector away. I just loved the big shallow feet. The feet are 45mm centres away from sides, which looked right to me, rather than 2" which with a bit of fettling would have still worked. Suppose i could move the centres a midges and fill the old hole.

[whines]

That happened with me with my first t39, the casters were too close to the corners. :/ Quick work with a dremel to cut away the plastic that overlapped worked fine, and it's really unnoticable.