|
Post by Gregg White (aka stratbrat) on Sept 28, 2005 16:10:36 GMT -7
I may have already seen this on the board, but I wanted to double check: If I want to try a 4-12 cab with my MAZ 38 SR, I will need to disconnect the internal speaker? (a 1-12 combo) The cab I want to try it through is switchable from 16 to 4 ohms. I need to push a little more air in the band setting I'm in and I think the 4-12 will do the trick. (Not for volume, but to give a little wider sound dispersion) But I would like to keep the 1-12 connected, if possible, just to keep the stock tone. I'd prefer to mic but the rest of the band isn't convinced that's they way they want to go (especially in the smaller venues that we play).
|
|
|
Post by bluzsteel on Sept 29, 2005 5:22:21 GMT -7
just use the Marshall at 16 ohm to the 16 ohm at the back of the Z, you can look for a chart on how to use a 412 and a single ohm wise 12 I would just use the marshall cab
better yet , Email DR , and he will let you know
|
|
|
Post by billyguitar on Sept 29, 2005 15:30:19 GMT -7
With the 16 ohm speaker in the amp and the 16 ohm Marshall box you would need to plug a Y cord into the 8 ohm tap on the back of the amp. If you have an ohm meter you can check it out by connecting both sets of speakers to the Y cord, then another cord of any type and then touching one lead to the tip and one lead to the shft of the plug. It should read about 6 ohms. It won't read between 6 and 8 ohms, I forget why, but that's the jist of it. Check yourself by trying a reading on the 16 ohm speaker by itself. It should read between 12 and 16 ohms. I would check the cab too just to be sure that it's wired to 16 ohms. One other problem is the speaker in the amp and the 4 x 12 box may not be in phase. Set them up together and play some low bassy notes. Then unlug one, go back to the 16 ohm tap and play the same bassy notes. If you get more bass this way then they are out of phase. If they are out of phase then make a special speaker where you switch the hot and ground on one end only. That will turn the cabs phase around and make them play together. It should sound killer!
|
|
|
Post by billyguitar on Sept 29, 2005 15:32:51 GMT -7
I made a typo on my response above. I meant to say that all your speakers hooked together WILL read between 6 and 8 ohms.
|
|
|
Post by Gregg White (aka stratbrat) on Sept 29, 2005 16:31:40 GMT -7
Thanks for the responses. BG: The stock Z speaker is plugged into the 8 ohm jack. I'm assuming that the speaker is 8 ohm (I'll have to check it out later).
So what I am reading (I think) is this: The MAZ SR 38 has 3 output jacks, 4, 8 and 16 ohms. Only 1 can be used at a time. Using a Y chord, total ohms should equal the output jack rating (give or take a couple ohms)
I'll double check the phase issue (almost forgot about that !)
I did plug in the cab at 16 ohms, with and without the Z speaker connected. (played at low volume and for a short time!) Sounded good. It's going to do what I want (a little more bottom covering a little more area without affecting the Z sound).
Next move is to buy the Z Best Cab! Anyone recommend a good dealer closest to the Wash DC area?
Thanks again for the help.
|
|
|
Post by billyguitar on Sept 30, 2005 7:44:11 GMT -7
I thought the 1-12 combos all used a 16 ohm speaker. Yours may have just been plugged into the wrong tap. If it is an 8 ohm I don't think it would work out as well. I think the 8 ohm speaker would get more juice than the 4-12 16 ohm cab. If I remember correctly the overall impedance would actually be less than 8 ohms but not much. I think it would still be okay to plug into the 8 ohm tap. If your meter reading is closer to 4 ohms than 8 you better use the 4 ohm tap. Re: The Z best cab I think it will actually play louder than the stock marshall box and won't have the 4 x 12 phase cancellation issues of 4-12s in one box. You would have to rewire it to 16 ohms instead of 4 ohm which I believe is the stock wiring impedance, if you want to use it simultaneously with the combo speaker. The Z Best cab is smaller too which is always nice at load-out.
|
|
|
Post by Gregg White (aka stratbrat) on Sept 30, 2005 10:53:54 GMT -7
Just checked the speaker. It's a Celestion G12H "70th Anniversary Special Edition" No specs on speaker. Website specs list it as both 8 and 16ohm. Not sure how that is done, will need to double check that.
|
|
|
Post by guitarboy02451 on Oct 3, 2005 8:06:24 GMT -7
Stratbrat, the ohms are not listed on the magnet sticker. It's lightly spray painted on on the aluminum frame (spokes coming off the magnet). Usually they are hardly readable/visable.
Hope this helps.
|
|
|
Post by Gregg White (aka stratbrat) on Oct 3, 2005 14:12:20 GMT -7
Paul, thanks.
I found it on a small paper label on the bottom of the magnet. It's an 8 ohm.
I am still fuzzy on whether I can leave this speaker plugged in and also plug in the 4-12 into the 4 or 16 ohm outputs, also.
I'll try the Y-cable into the 4 ohm output. 4-12 cab set on 16 and the 8 ohm should be around 6 ohms (approx) From my feeble understanding, this should be OK
|
|
|
Post by bluzsteel on Oct 4, 2005 6:38:31 GMT -7
Paul, thanks. I found it on a small paper label on the bottom of the magnet. It's an 8 ohm. I am still fuzzy on whether I can leave this speaker plugged in and also plug in the 4-12 into the 4 or 16 ohm outputs, also. I'll try the Y-cable into the 4 ohm output. 4-12 cab set on 16 and the 8 ohm should be around 6 ohms (approx) From my feeble understanding, this should be OK try this link and look at the main page and go to Questions , he talks about ohms loads www.tedweber.com/
|
|
|
Post by guitarboy02451 on Oct 4, 2005 10:34:44 GMT -7
When I plug my Z into my 4 x12, I use the 4 ohm output. On the back of my 1960A, there is two jacks 4/16 Jack, and a 8 Jack.
I plug from the 4 ohm into the 4/16 jack. The 1960A also has a Stereo/Mono switch. It's set to mono at all times.
Like you, I'm not certain if this connection is correct or not, I assume it is. But I will say the Maz 38 sounds mighty fine going into a 4x12 with Celestion 25watt GB's!
pg ;-)
|
|
|
Post by hdahs143 on Oct 4, 2005 10:42:08 GMT -7
The "Let's talk speakers" Q & A on the website that Dave referred you to has diagrams and resulting impedances of a multitude of speaker setups. Just make sure you do your math correctly as dropping the impedance too low can be harmful to your output transformer
|
|
King B
Junior Member
Posts: 90
|
Post by King B on Oct 14, 2005 13:02:34 GMT -7
Alright I have a question...
I have a maz38 head, 2X12 open back cab, and a Z-Best 2X12 cab. both cabs are 8 ohm cabs.
I want to use both...Are the speakers wired in parallel or in series? can i simply use a y-cable and go into the 4 ohm jack....
|
|
|
Post by bluzsteel on Oct 14, 2005 16:07:45 GMT -7
I use a Reverend Y cable out of Maz {4 ohm} and run out to the two cabs
|
|
luke
Full Member
Mini
Posts: 109
|
Post by luke on Oct 15, 2005 2:16:25 GMT -7
I use a Radio Shack Gold Plated "Y" adapter (#274-892) $4.99 Luke
|
|