[metropolis4]

Originally Posted by ABPOS

Metropolis4, the celestion Golds do well in an open back? As do greenbacks? Do those have big magnets? Or small, comparitively. I hear that the smaller magnets are better for closed backs. I'm not sure if that's true or not.

Yeah, the Golds and Blues sound better in an open cabinet. I've used greenbacks in both open and closed and I think they sound good in both. I'm not too good on the physics of magnets, but if you go to Weber's website you'll find a bunch of good information about magnets that might answer your question. I believe the greenbacks use a relatively small ceramic magnet. But they still sound good in a closed back cab (just listen to early Hendrix). I'm not sure about the magnet in the gold, other than it's alnico

[BillSPrestonEsq]

Originally Posted by metropolis4

Yeah, the Golds and Blues sound better in an open cabinet. I've used greenbacks in both open and closed and I think they sound good in both. I'm not too good on the physics of magnets, but if you go to Weber's website you'll find a bunch of good information about magnets that might answer your question. I believe the greenbacks use a relatively small ceramic magnet. But they still sound good in a closed back cab (just listen to early Hendrix). I'm not sure about the magnet in the gold, other than it's alnico

Judging by the weight of a greenback, I thought its magnet was relatively large. Not ev 12l large, but decently heavy and on the larger side.

And I like using an amp stand to tilt the cab up at me when using a 1x12 or 2x12

[jefcon1]

[ABPOS]

Hope you don't have to move that bad boy around too much.

Do they make stands that tilt your cabinet or amp up on an angle?

[jefcon1]

Originally Posted by ABPOS

Hope you don't have to move that bad boy around too much.

I don't have any trouble moving it at all. In fact, I moved it out about 6 feet to take that picture last month and my back mobility is already improving.

[jthomas1600]

I've got a few questions I'd like to piggy back on here if ya'll don't mind. I'm going to build a cab soon. Maybe right after Christmas. A 1X12. Several of you have mentioned angling them up and several people have mentioned raising them.

What if I built the box say 16 inches wide and 30 tall and mounted the speaker towards the top. Would all that excess space in the box be a good thing? Would all that excess space change the way you thought about weather you would want an opened or closed back? What if you mounted the speaker behind the grill cloth at an angle? Would that be the same as angling the cab or is it necessary to angle the whole box?

[BillSPrestonEsq]

Originally Posted by jthomas1600

I've got a few questions I'd like to piggy back on here if ya'll don't mind. I'm going to build a cab soon. Maybe right after Christmas. A 1X12. Several of you have mentioned angling them up and several people have mentioned raising them.

What if I built the box say 16 inches wide and 30 tall and mounted the speaker towards the top. Would all that excess space in the box be a good thing? Would all that excess space change the way you thought about weather you would want an opened or closed back? What if you mounted the speaker behind the grill cloth at an angle? Would that be the same as angling the cab or is it necessary to angle the whole box?

That extra space will change the sound. Good? Bad? I really don't know. (I know some guys who could answer that question, but its a LOT of math and such), but I would recommend not doing that. It would be kind of topheavy at best. I would get a $25 amp stand from Carvin and put a standard 1x12 on that. Perhaps build a Mesa Thiele style ported 1x12. (Those sound huge for a 1x12) They are also fairly small and light.

[jthomas1600]

Like this. Are those baffles on the side that are placed in those particular spots for a reason or just bracing for the box? Is the open port on the side as opposed to the top or bottom for a reason? Or just this particular designers preference? I don't know what kind of speakers they put in these things, but I just googled them and new ones from Mesa are an arm and a leg.

[BillSPrestonEsq]

Originally Posted by jthomas1600

Like this. Are those baffles on the side that are placed in those particular spots for a reason or just bracing for the box? Is the open port on the side as opposed to the top or bottom for a reason? Or just this particular designers preference? I don't know what kind of speakers they put in these things, but I just googled them and new ones from Mesa are an arm and a leg.

Yep, those are the ones. As I understand it, it is all engineered that way for a reason. I just got one in a trade... Wow is all I have to say. The speakers they put in those tend to be either 90 watt celestion black shadows or 200 watt ev black shadows. Used, the celestions are not too expensive and sound nice.

But if you want to build a 1x12 and you and your son I assume both like kind of hard rock, that is IMO, the best 1x12 to build. And I'd be happy to measure out mine. I may build a few to go with mine.

[Stratopastor]

jthomas, the extra space in the cab you propose (I'm assuming closed-back) would (a) give more bass response and (b) make another change (that I wouldn't like to predict due to lack of experience) based on the idea that the speaker cone would have more air behind it, presenting a less-stiff spring-effect. If the cab were smaller, the smaller amount of air inside would be less compressible and act as a stiffer spring. But as I say, I don't know what that effect does to the sound.

If you're talking open-back then the depth (front to rear) of the cab helps the bass somewhat, but you seem to be more interested in height.

Angling the driver in the box - too much like complicated carpentry. Tilt the whole cab. Or do the foam donut.

Regarding the photo, those three rectangular pieces (probably a fourth one hidden from view) are there to stiffen the otherwise-unsupported edge of the speaker baffle (ie the bit with the circular hole). I imagine the orientation of the cab in use (port on the side as shown vs. port below the speaker) will affect the dispersion of the sound a little, but (I suspect) not enough in practice to be detected outside of a lab - only the mids and bass will be affected and they tend to disperse wide enough for gigging purposes anyway.

hope this helps

SP

[telebender1956]

I'm an open back guy only in combos and the amp of choice for me is a Fender Super Reverb [4X10]. IN church settings I Iike to use a 1x10 or 1x12 low power[15 watts] tube combo.

[playgr8gtr]

Open back on Fender type sand closed back on Marshall types as ageneral rule.

[ABPOS]

Part of me wants to rip part of the back of my cabinet off. Hehehehe

[hplange]

I'm currently looking at getting the Stoneage 2x12 with vintage 30 speakers smei-open with narrow opening.