| Building a 2X15 guitar cab. help! - Click HERE for Original Thread |
| darkesthour |
I have an old cab from like the 70s and i want to make a new cab for the speakers.
The cab contains 2 15inch 16ohm speakers. i was wondering how i could wire those together for 8 ohms.
I have a line 6 spider 3 head with two 8 ohm outputs on the back. could i wire 2 inputs with 1 speaker to each in the cab? or would this not work
I really am not to smart with wiring.
And I have never seen another 2X15 guitar cab :-( is there a reason for that? i love the lows of the 15s though!
Please help me out. thanks |
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| Aidan135711 |
| Do this and only this |
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| leadbelly |
| quote: | Originally posted by darkesthour
And I have never seen another 2X15 guitar cab :-( is there a reason for that? |
Aesthetics. The footprint of the 4x12 cab is the standard so everything can be stacked. That's why you often see 4x10's and 1x15's made to the same dimensions as the 4x12. Of course, that's no reason to not build your cab exactly how you want it. |
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| Andronico |
BE CAREFUL !!
If your amp is the Line 6 HD150, it has two outputs of 8 ohms minimum each, this amp is stereo and you can´t use only one of the inputs or connect them in parallel.
If this is the case, you can connect one 16 ohms speaker to each channel. The amp can handle speakers with more ohms but not with less. If your amp is the HD75 (like mine) you can connect the speakers in parallel to obtain 8 ohms because this amp is mono. Don´t worry to ask about. |
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| leadbelly |
Geez, maybe it's my age, but I would prefer the cab they're already in:) Why don't you just invest in new vinyl and grille cloth and restore that cab? |
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| Aidan135711 |
If this is the case, you can connect one 16 ohms speaker to each channel
If he does this,will the amp will not produce as much power as it could into 8ohms? |
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| leadbelly |
| quote: | Originally posted by Aidan135711
If he does this,will the amp will not produce as much power as it could into 8ohms? |
Depends. On some Line 6's each output has it's own LM3886. If this is what he has then 1 driver per chip is the batter way to go. |
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| Aidan135711 |
| quote: | Originally posted by leadbelly
Depends. On some Line 6's each output has it's own LM3886. If this is what he has then 1 driver per chip is the batter way to go. |
But what I mean is ,should'nt an 8 ohm speaker sound louder(on volume setting 5 for example) than a 16 ohm on the same volume setting?
By the way do yous like my new avatar? |
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| darkesthour |
| quote: | Originally posted by Andronico
BE CAREFUL !!
If your amp is the Line 6 HD150, it has two outputs of 8 ohms minimum each, this amp is stereo and you can´t use only one of the inputs or connect them in parallel.
If this is the case, you can connect one 16 ohms speaker to each channel. The amp can handle speakers with more ohms but not with less. If your amp is the HD75 (like mine) you can connect the speakers in parallel to obtain 8 ohms because this amp is mono. Don´t worry to ask about. |
| quote: | Originally posted by leadbelly
Geez, maybe it's my age, but I would prefer the cab they're already in:) Why don't you just invest in new vinyl and grille cloth and restore that cab? |
Well I have played out of this cab using only 1 output for about a year and had no problems.
Id really like to use the full power of my head though, so only using 1 output doesnt seem good.
And yea this cab is OLD! got it outa some old ladys basement for free so i cant complain. I really dont like the looks of the cab though, id much rather build a new 1 for it.
would 2 15's fit in a typical 4X12 size cab? Kinda like this.
(http://www.vadercabinets.com/sitebu...pg.w300h336.jpg)
Wow people on this forum actually help, thanks |
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| darkesthour |
I will start building my 2X15 cab this weekend, with 1 input so 8 ohms. then once i finish that cab im going to buy two 12'' speakers(16ohms each) and make another cab to hold those two speakers. So i can really use the power of my head. 1 output for each cab.
I think the hardest part is going to make them stack :-)
But thanks for all the help. those links gave me a way better understanding of what im going to do. |
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| Aidan135711 |
Good stuff.
I think you should have a look around the net for the way to calculate resistors(speakers) in series and paralell,then you can make all sorts of combinations and not worry about smoking yer amp.
Good luck. |
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| darkesthour |
Yea, i was kinda worried about blowing my head or something.
Ill chek into that stuff
Thanks again
oh ill post some pics of it when its done :-) |
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| Andronico |
| quote: | Originally posted by darkesthour
I will start building my 2X15 cab this weekend, with 1 input so 8 ohms. then once i finish that cab im going to buy two 12'' speakers(16ohms each) and make another cab to hold those two speakers. So i can really use the power of my head. 1 output for each cab.
I think the hardest part is going to make them stack :-)
But thanks for all the help. those links gave me a way better understanding of what im going to do. |
I´m happy to help. But you can build only one cab with your 15¨ speakers and the new 12¨ ones. One 15¨and 12¨ by channel (16 ohms in parallel = 8 ohms). I think that is more easy to build one cab instead of two, and more cheaper too.
:)
We are waiting for your pics, I gave my camera to my father because he´s on holidays now. But when he returns, I´ll take some pics to my 2x12 cab to show you. |
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| darkesthour |
| quote: | Originally posted by Andronico
I´m happy to help. But you can build only one cab with your 15¨ speakers and the new 12¨ ones. One 15¨and 12¨ by channel (16 ohms in parallel = 8 ohms). I think that is more easy to build one cab instead of two, and more cheaper too.
:)
We are waiting for your pics, I gave my camera to my father because he´s on holidays now. But when he returns, I´ll take some pics to my 2x12 cab to show you. |
But if i build 1 cab with two 15's and two 12's wouldnt that have too be a huge cab? And really heavy. plus i really wanted a stack. id rather make 2 cabs :-)
alright ill be witing for those pics, and posting some soon.
I also had a question about porting. do i need some air ports? |
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| Andronico |
Beautiful work man ! Congratulations :)
Keep us updated. :smash: |
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| Brett |
I'm just glad I don't have to load in/out a box of that size and shape.
Some internal bracing would be beneficial. |
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| Aidan135711 |
| Very nice,Darkest Hour.Looks well made,square and strong.It will look great when covered,with some nice handles and some of those nice chrome corner protector thingies.Maybe some castor wheels too. |
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| darkesthour |
Yea i ordered the corners,casters and handles and stuff off line the other day, just waiting for them to ship.
yea it is bulky and heavy but thats what friends are for , they will help me carry it :-)
i couldnt really make it any smaller without cutting it to close from the speakers to the bracing. But i only made it 2 inchs wider than most 4X12 cabs.
Ill have it carpeted up and finished within a week.
peace |
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| Andronico |
Congratulations ! How it sounds ?
Last December I bought a Spider III HD75 and I have to build a 2x12 cab for it now. I´ll begin with the construction in a couple of weeks when I finished my travel guitar. :smash: |
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| SemperFi |
Andronico. U should make a seperate thread regarding your travel guitar, I am making exactly that as we speak;)
As for the 2x15 I personally likd the old school vintagish original, but understand the need to make your own...I can never leave well enuff alone myself.
How do u like the 2x15 sound? I have a couple of 15" jensens and have been wanting to make a cab for them. Just need more hours in the day.... |
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| darkesthour |
It actually sounds better than i thought it would. The 2X15's own, i can turn it up halfway and i can easily overpower the drums. and it sill sounds really clear and full. and the highs sound pretty mint to.
Just gotta find a nice looking grill for it. then start working on the 2X12 cab. |
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| Aidan135711 |
Hey darkesthour
Nice work,would make a great bass amp cab too! |
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| losaavedra |
Interesting thread! I've done similar for a couple of 15" run by the amp on top in the pic which I play bass through. My Spider 212 has been 'de-capitated' (it was too heavy for me as one box) so now its a head and a separate cab. I occasionally run the (stereo) head through both the 8 Ohm Celestion 12" speakers and the two Eminence 15" speakers by presenting 16 Ohms to each of the two 8 Ohm sockets on the Spider. The 2x15" cab weighs in at a hefty 60 KG made up of two separate smaller cabinets each holding a 15" screwed inside a larger cabinet. Despite being heavy its easy to move around as I built a kind-of tilt-and-push 'sack barrow' arrangement onto the back.
http://i85.photobucket.com/albums/k...IC/ALLGEAR4.jpg |
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| losaavedra |
Ah, found a pic of the back of the 2 x 15" cab with the wheelie attachment (old wheelchair parts!). The sockets on the back enable different speaker configurations ... Left panel: upper 8 Ohm 15" jack on left, lower 8 Ohm 15" jack on right. Right panel: On-feeds, left socket (breaks into upper 15" loop) enables patch-in of an 8 Ohm 12" outrigger to yield 16 Ohm load. Right socket does the same for other side of stereo pair. All cab walls are 3.2 cm thick (two lots of 1.6 mm MDF glued and screwed together). The bottom is fitted with a chunk of 'sacrificial' (i.e. replaceable) chipboard so the thing sits flat on the ground when not being wheeled around. I was tempted to fit spikes to the bottom ... but few venues appreciate their floors having holes dug in them!!!
http://i85.photobucket.com/albums/k...IC/BASTABA1.jpg |
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| tarzanalog |
Nice work!
I love the tone of 15's with guitar. I did a sweet little 1x15 Big Ben combo cab for an 18W Lite IIb I did last summer. It was a head turner! |
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| darkesthour |
Well i finnaly found a decent grill for this beast. here it is.
http://i28.photobucket.com/albums/c...***/Godly-1.jpg
Yea this cab is pretty heavy, but its extremely sturdy and ill never worry about it breaking. even if it takes a fall down the stairs. :-) |
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| Aidan135711 |
Cool!
Is it steel? |
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| darkesthour |
| yea it wasnt very cheep though :( but well worth it. |
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| Aidan135711 |
| You buy cheap,you buy twice! |
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