SPEAKER WIRING - Page 3

Landshark · 07-05-2009, 04:28 AM

Quote:

Originally Posted by Adwex

Yes, there is a problem. 2 8x10 cabs, at 4 ohms each, will equal 2 ohms when you them both into the amp. I don't know of any amp that can run at 2 ohms.

You could wire the two cabs in series with each other, then they would combine to equal 8 ohms.

This is interesting because if you have Four (4) 16 ohm cabs you can actually run two Y cables (with the four ends in the cabs) into the two cabinet outputs with the selector set to 4 ohms. Sweet set up! I just need three more cabs and two Y cables...

Landshark · 07-05-2009, 04:46 AM

Quote:

Originally Posted by Mr69bungle

I'm going to have a go after thinking it over - i'll let you know how i got on

Are you wanting to run two heads through the same cab but want the cab 16 ohms mono per side? Cause if that's what you're going for then just use one side (or if you are wiring the cab top and bottom) wired in series to one of the jacks, then the other side (or bottom) in series and wired to it's own separate jack That will give you a double 2x12 in one cab with each half operating 16 ohms mono through each side individualy powered by it's own head.

Hope this is what you are wanting because if you are wanting to get four 8 ohm speakers wired to 16 ohms it can't be done. You would need 16 ohm speakers.

Landshark · 07-05-2009, 04:59 AM

Quote:

Originally Posted by uncletiki

Is it a BAD thing to drop 1 G12M 25Watt speaker into a 4x12 cab with 3 G12T 75 Watt speakers if there all the same ohms? I could use that as my main record speaker. That would save me some cash.

As long as all four speakers are the same ohms rating I don't think it will hurt anything. It won't have the same output as the 75 watt speakers but if the ohm rating is the same it should be fine.

Nikki Lamar · 07-18-2009, 10:33 AM

Ive got a 50 watt head with a 4X12 16ohm 30 watt speaker cabinet. Whats the difference bewteen paralell, series , or series paralell in terms of sound? Is one better than another? I'm confused.

Thanks.

mare · 07-29-2009, 06:24 AM

Hi everybody,
I need an advice, opinion
I use Marshall jcm 800 lead 100W 2203, and jcm 800 bass cab 1935B 4x12 (celestion g12-65 1777)

So, I have opened my JCM 800 bass series 1935B 4x12" cab and I saw this!

I thought it was 16 Ohm cab, but it's, I think serial, so 4x16=64Ohm. Correct me if I'm wrong. I bought It 8 years ago, used ofcourse.

First thing that confused me was 1777 code on cone, because I thought it was code for guitar speakers, and this is bass cab, than I saw they are serial wired, and impendance selector on my amplifier is on 16 Ohm.

Questions:
1. Are these speakers suitable with my 2203?
2. Should I wire parallel/serial this speakres to get 16 Ohm total cab impendance.

PS Sorry for my english, it's not the best.

American Viking · 07-29-2009, 04:01 PM

Jumbo Sunshade - Speaker Wiring Diagrams
there's every wiring diagram you need

deadendindustres · 08-06-2009, 01:55 PM

ANY ONE KNOW HOW TO WIRE UP 2 8 ohm celestion with 2 16ohm in one 4x12 marshall cabnet. I have looked all over the net but nothing

MartyStrat54 · 08-06-2009, 03:00 PM

I posted a response to your thread. The bottom line is you can't do it without putting your amp in harm's way.

dudewheresmybass · 09-14-2009, 08:24 PM

Quote:

Originally Posted by American Viking

Jumbo Sunshade - Speaker Wiring Diagrams
there's every wiring diagram you need

hi.
noob to this forum, and i'm probabaly going to ask a complete noob question!

i have a 7200 DBS head rated to run with amin of 4 ohm load.
however i have two MBC410 cabs each rated at 4 ohms.
i want to use both cabs, so am i right in thinking that i should get my cabs rewired to run in series, and therefore push their rating/ load to 8 ohms each? (assuming the individual speaker impedances are suitable)

i hope some one is able to helps.

Cheers

Reginald · 10-14-2009, 09:33 AM

Quote:

Originally Posted by KingKong

Howdi all,

I just signed up on the forums and am in need of assistance!

I just bought a nearly new tsl 100 head, and I want to make sure my cabinet is wired for 16 ohm impedance. I'm attaching a pic. The lower terminal of the upper right speaker (as you look at the pic) is positive. I believe the top speaker terminals on the speakers on the left are positive (marked with red dot). The speakers are each 16 ohm. I believe the top two are wired together in series, the bottom two are wired together in series, and the upper pair is wired to the lower pair in parallel.

If anyone could take a look at this and share an opinion I'd appreciate it!

I'm thinking it's 16 ohms total impedance, but I'd like another opinion before I use the 16 ohm output from the tsl 100.

Thanks!
Kong

What's difference there's between wire connection of both?Which's in series/parallel and which in parallel?
And with which between them the amp/the OTtransformer ,the whole circuit too)work much less hard with? I'm sorry I don't able to insert also cab photo of him,help me,please....but you can see at the first page on this topic

Reginald · 10-16-2009, 10:31 AM

what's the differences?

Wilder Amplification · 10-29-2009, 03:22 AM

Quote:

Originally Posted by Reginald

what's the differences?

I think this is what you meant to draw.

What's the difference? Well if you take the Series Parallel drawing and you add a wire between the series connection point of the left pair of speakers and the series connection point of the right pair, you now have Parallel Series.

Other than that...they both give the same total load impedance out, which will be equal to the impedance of one of the 4 speakers if they're all equal impedance, which they should be. The amp don't know the difference between the two. Some people claim there's a tonal difference but personally I don't buy it.

American Viking · 10-29-2009, 03:36 AM

Quote:

Originally Posted by dudewheresmybass

hi.
noob to this forum, and i'm probabaly going to ask a complete noob question!

i have a 7200 DBS head rated to run with amin of 4 ohm load.
however i have two MBC410 cabs each rated at 4 ohms.
i want to use both cabs, so am i right in thinking that i should get my cabs rewired to run in series, and therefore push their rating/ load to 8 ohms each? (assuming the individual speaker impedances are suitable)

i hope some one is able to helps.

Cheers

If both cabinets are 4x10 then you can rewire them from 4ohm to 16ohm and when using both cabinets (now at 16) you set the head to 8ohms.
Here is a link that has the diagram that you need. I believe the Jumbo Sunshade has left this one out.
Wiring a 4 X 12 Speaker cabinet

If the speakers are 4ohms each, then you need to wire like this...
Four 4ohm speakers wired in series to yield a final load of 16ohms

If the speakers are 16ohms each then you are more than likely wired like this... *edit, thanks JohnH!
Four 16ohm speakers wired in parallel to yield a final load of 4ohms

So you need to change to this...
Four 16ohm speakers wired in series/parallel to yield a final load of 16ohms

I highly recommend getting a multimeter if you don't already have one and always check the impedance of any finished work you have performed. I do, every time just to be 100% sure.

JohnH · 10-29-2009, 04:37 AM

careful AV! that second diagram is 4x16 Ohms to give 4Ohms total
J

Wilder Amplification · 10-29-2009, 10:58 AM

Quote:

Originally Posted by JohnH

careful AV! that second diagram is 4x16 Ohms to give 4Ohms total
J

Good catch on that typo!

Buggs.Crosby · 10-29-2009, 11:13 AM

Also from the Shavano site is this jem
Shavano Music Online - Speaker Wiring; Impedance Calculator
it is great for figuring out mismatched speaker impedance

TheGummy · 10-29-2009, 12:17 PM

hello, I've got a 2x12 master volume combo and have noticed that the two speakers sound drastically different.

its not necessarily a bad sound, in fact its quite nice, but im concerned that it's a sign that something isn't right. the amp was serviced before i bought it so i would have thought it was all good.

the amp seems to be wired to one speaker (one with a fuller, clearer sound) first and then the cables go on to the other speaker (duller and muddier)

i believe that the document that came with it said they were wired in parallel, but i dont know enough to recognise whats going on.

would appreciate any help,

Thanks.

Wilder Amplification · 10-29-2009, 12:25 PM

Quote:

Originally Posted by TheGummy

hello, I've got a 2x12 master volume combo and have noticed that the two speakers sound drastically different.

its not necessarily a bad sound, in fact its quite nice, but im concerned that it's a sign that something isn't right. the amp was serviced before i bought it so i would have thought it was all good.

the amp seems to be wired to one speaker (one with a fuller, clearer sound) first and then the cables go on to the other speaker (duller and muddier)

i believe that the document that came with it said they were wired in parallel, but i dont know enough to recognise whats going on.

would appreciate any help,

Thanks.

If you have 1 wire going from the positive terminal of 1 speaker to the positive terminal of the other speaker, then a 2nd wire from the negative terminal of 1 to the negative terminal of the other, that's parallel wiring.

If you have a jumper wire connected from the negative of one speaker to the positive of the other speaker, then it's series wired.

If they're 16 ohm speakers, they should be wired parallel to give you an 8 ohm load.

If they're 4 ohm speakers, they should be wired in series to give you an 8 ohm load.

8 ohm speakers can be wired either or, and in parallel will give you 4 ohms while giving 16 ohms in series.

If you can post up a couple of pics of the insides of the cab I can tell you exactly what you have goin' on.

American Viking · 10-29-2009, 01:35 PM

Quote:

Originally Posted by JohnH

careful AV! that second diagram is 4x16 Ohms to give 4Ohms total
J

Ooops! Thanks John, I totally missed that. Last post before I went to bed last night. I went back and corrected it now.

enteroutside · 10-29-2009, 07:52 PM

Hi guys, very interesting topic!

here is my question/case

i have a 8240 Valvestate (2 40W speakers 4Ohm each) and i want to use it as a cabinet for my 100W head.

apart from the Watts that don't fit (but i won't push the amp to hard so it wouldn't be a problem right?) how should i connect the speakers?

currently the valvestate has 2 outputs (1 red, 1 black) that i assume are 2 seperate 4 Ohm speakers.

Should i wire them is series and connect one of the outs to the head at 8 Ohm? How would the connection be and which output (red or black) should i choose? I can't connect both of them coz my amp doesn't have a 2x4 Ohms choice ain't it right?

Thanks in advance

K.

Wilder Amplification · 10-29-2009, 08:20 PM

Quote:

Originally Posted by enteroutside

Hi guys, very interesting topic!

here is my question/case

i have a 8240 Valvestate (2 40W speakers 4Ohm each) and i want to use it as a cabinet for my 100W head.

apart from the Watts that don't fit (but i won't push the amp to hard so it wouldn't be a problem right?) how should i connect the speakers?

currently the valvestate has 2 outputs (1 red, 1 black) that i assume are 2 seperate 4 Ohm speakers.

Should i wire them is series and connect one of the outs to the head at 8 Ohm? How would the connection be and which output (red or black) should i choose? I can't connect both of them coz my amp doesn't have a 2x4 Ohms choice ain't it right?

Thanks in advance

K.

First off, if you're gonna use that as a cab, the amp that will be powering the speakers will have no connection to the amp whatsoever. If the speakers have a 1/4" male plug on them, you would need to get a 1/4" female to female adapter to allow you to plug a speaker cable into the speakers.

Also, the speakers would have to be series wired since they're 4 ohms, giving you a total 8 ohm load.

enteroutside · 10-29-2009, 08:31 PM

actually the way 8240 is made (correct me if i'm wrong) is that 2 jacks come out of the speakers so i could connect them direct to the head amp (one of them). If i use a Y to connect both of them and then connect the single out to the head is this a series connection?

2x4 Ohm cabs - Y adapter - one 1x8 Ohm out to head. is it correct?

if not how can i connect them i series having only one of the jacks as output?..sorry, is it clear what i'm asking? If not iìll try to be more specific.

thanks

TheGummy · 10-30-2009, 06:44 PM

Quote:

Originally Posted by Wilder Amplification

If you have 1 wire going from the positive terminal of 1 speaker to the positive terminal of the other speaker, then a 2nd wire from the negative terminal of 1 to the negative terminal of the other, that's parallel wiring.

If you have a jumper wire connected from the negative of one speaker to the positive of the other speaker, then it's series wired.

If they're 16 ohm speakers, they should be wired parallel to give you an 8 ohm load.

If they're 4 ohm speakers, they should be wired in series to give you an 8 ohm load.

8 ohm speakers can be wired either or, and in parallel will give you 4 ohms while giving 16 ohms in series.

If you can post up a couple of pics of the insides of the cab I can tell you exactly what you have goin' on.

yep, that would fit what i thought. that would make it 2x 16 ohm speakers in parallel. cheers.

would this wiring account for the difference in the two speakers? the first one in the chain being clearer and has a slightly higher output.

or is this just down to some old, abused speakers? as long as it's not a sign of something being wrong or it could lead to other problems, then i'm not fussed.

Wilder Amplification · 10-30-2009, 07:13 PM

Quote:

Originally Posted by enteroutside

actually the way 8240 is made (correct me if i'm wrong) is that 2 jacks come out of the speakers so i could connect them direct to the head amp (one of them). If i use a Y to connect both of them and then connect the single out to the head is this a series connection?

2x4 Ohm cabs - Y adapter - one 1x8 Ohm out to head. is it correct?

if not how can i connect them i series having only one of the jacks as output?..sorry, is it clear what i'm asking? If not iìll try to be more specific.

thanks

No, using a Y parallels them.

To series wire them with 1 jack, connect the jack's positive to the positive of one speaker, then connect the jack's negative to the negative of the opposite speaker. Then connect a wire between the positive and negative terminals that aren't connected to the jack.

Wilder Amplification · 10-30-2009, 07:15 PM

Quote:

Originally Posted by TheGummy

yep, that would fit what i thought. that would make it 2x 16 ohm speakers in parallel. cheers.

would this wiring account for the difference in the two speakers? the first one in the chain being clearer and has a slightly higher output.

or is this just down to some old, abused speakers? as long as it's not a sign of something being wrong or it could lead to other problems, then i'm not fussed.

Well that could be the case. The wires that run from one speaker to the other only have to carry the current for one speaker, whereas the wires running from the amp to the first speaker has to carry the current for both speakers. I would try increasing the size of the wires running from the amp to the first speaker to find out and see if you hear a difference.

enteroutside · 10-31-2009, 04:55 AM

Quote:

Originally Posted by Wilder Amplification

To series wire them with 1 jack, connect the jack's positive to the positive of one speaker, then connect the jack's negative to the negative of the opposite speaker. Then connect a wire between the positive and negative terminals that aren't connected to the jack.

Great, thank you. Being 2 40w speakers now the cabin becomes 80W by connecting the two speakers togehter?

Quote:

Originally Posted by Wilder Amplification

No, using a Y parallels them.

is there a way to series the two line cables with an external adapter?

Thanks so much for the info.

Wilder Amplification · 10-31-2009, 12:49 PM

Quote:

Originally Posted by enteroutside

Great, thank you. Being 2 40w speakers now the cabin becomes 80W by connecting the two speakers togehter?

is there a way to series the two line cables with an external adapter?

Thanks so much for the info.

Not that I'm aware of. Don't think they ever made a series adapter.

dudewheresmybass · 11-02-2009, 03:14 AM

thanks for your insight American Viking - cheers

Donavan · 11-04-2009, 07:12 PM

Hi guys ,I'm new to this Forum... Kinda. I have used it as a reference to help me out a few times really good info here. Anyways i need a bit of help to insure I don't blow up my amp. I have three cabinets, one 2 X 12 (16 ohms), one 1X12(16 ohms) and one 4X 10(8 ohms).Can I run the 2X 12 in parallel with the 1X 12 on one input of my head and the 4X 10 on the other input? The inputs are in parallel.And should this be set on 4 ohms? The head is a converted jcm 900 duel reverb combo(yeah I know everybody hate's em) with the 4 and 8 ohm switch.I attached a very crude mess of a diagram to show ya what i am trying to do. Try not to get too jealous of my paint program skills!!!

Wilder Amplification · 11-04-2009, 07:23 PM

Quote:

Originally Posted by Donavan

Hi guys ,I'm new to this Forum... Kinda. I have used it as a reference to help me out a few times really good info here. Anyways i need a bit of help to insure I don't blow up my amp. I have three cabinets, one 2 X 12 (16 ohms), one 1X12(16 ohms) and one 4X 10(8 ohms).Can I run the 2X 12 in parallel with the 1X 12 on one input of my head and the 4X 10 on the other input? The inputs are in parallel.And should this be set on 4 ohms? The head is a converted jcm 900 duel reverb combo(yeah I know everybody hate's em) with the 4 and 8 ohm switch.I attached a very crude mess of a diagram to show ya what i am trying to do. Try not to get too jealous of my paint program skills!!!

Yes set it to 4 ohms and all should be good.

07-18-2009, 10:33 AM	#64 (permalink)
Nikki Lamar Junior Member Join Date: Jul 2009 Posts: 5	Re: SPEAKER WIRING Ive got a 50 watt head with a 4X12 16ohm 30 watt speaker cabinet. Whats the difference bewteen paralell, series , or series paralell in terms of sound? Is one better than another? I'm confused. Thanks.

07-29-2009, 06:24 AM	#65 (permalink)
mare Junior Member Join Date: Jul 2009 Posts: 3	Re: SPEAKER WIRING Hi everybody, I need an advice, opinion I use Marshall jcm 800 lead 100W 2203, and jcm 800 bass cab 1935B 4x12 (celestion g12-65 1777) So, I have opened my JCM 800 bass series 1935B 4x12" cab and I saw this! I thought it was 16 Ohm cab, but it's, I think serial, so 4x16=64Ohm. Correct me if I'm wrong. I bought It 8 years ago, used ofcourse. First thing that confused me was 1777 code on cone, because I thought it was code for guitar speakers, and this is bass cab, than I saw they are serial wired, and impendance selector on my amplifier is on 16 Ohm. Questions: 1. Are these speakers suitable with my 2203? 2. Should I wire parallel/serial this speakres to get 16 Ohm total cab impendance. PS Sorry for my english, it's not the best.

07-29-2009, 04:01 PM	#66 (permalink)
American Viking Senior Member Join Date: Jan 2009 Location: RICHMOND, VIRGINIA Posts: 2,044	Re: SPEAKER WIRING Jumbo Sunshade - Speaker Wiring Diagrams there's every wiring diagram you need __________________ "TOO LOUD" can only be applied to shitty bands.

08-06-2009, 01:55 PM	#67 (permalink)
deadendindustres Junior Member Join Date: Aug 2009 Location: omaha ne Posts: 3	Re: SPEAKER WIRING ANY ONE KNOW HOW TO WIRE UP 2 8 ohm celestion with 2 16ohm in one 4x12 marshall cabnet. I have looked all over the net but nothing

10-29-2009, 04:37 AM	#74 (permalink)
JohnH Senior Member Join Date: May 2008 Location: Wollongong NSW Posts: 937	Re: SPEAKER WIRING careful AV! that second diagram is 4x16 Ohms to give 4Ohms total J __________________ DSL401 8412 cab Crate Powerblock 1 x 12 Vintage 30 cab '76 Shergold Masquerader '93 Les Paul Studio '83 Roadstar

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10-29-2009, 11:13 AM	#76 (permalink)
Buggs.Crosby Senior Member Join Date: May 2009 Location: S.Jersey Posts: 4,100	Re: SPEAKER WIRING Also from the Shavano site is this jem Shavano Music Online - Speaker Wiring; Impedance Calculator it is great for figuring out mismatched speaker impedance

10-29-2009, 12:17 PM	#77 (permalink)
TheGummy Member Join Date: Oct 2009 Posts: 76	Re: SPEAKER WIRING hello, I've got a 2x12 master volume combo and have noticed that the two speakers sound drastically different. its not necessarily a bad sound, in fact its quite nice, but im concerned that it's a sign that something isn't right. the amp was serviced before i bought it so i would have thought it was all good. the amp seems to be wired to one speaker (one with a fuller, clearer sound) first and then the cables go on to the other speaker (duller and muddier) i believe that the document that came with it said they were wired in parallel, but i dont know enough to recognise whats going on. would appreciate any help, Thanks.

10-29-2009, 07:52 PM	#80 (permalink)
enteroutside Junior Member Join Date: Oct 2009 Posts: 3	Re: SPEAKER WIRING Hi guys, very interesting topic! here is my question/case i have a 8240 Valvestate (2 40W speakers 4Ohm each) and i want to use it as a cabinet for my 100W head. apart from the Watts that don't fit (but i won't push the amp to hard so it wouldn't be a problem right?) how should i connect the speakers? currently the valvestate has 2 outputs (1 red, 1 black) that i assume are 2 seperate 4 Ohm speakers. Should i wire them is series and connect one of the outs to the head at 8 Ohm? How would the connection be and which output (red or black) should i choose? I can't connect both of them coz my amp doesn't have a 2x4 Ohms choice ain't it right? Thanks in advance K.

10-29-2009, 08:31 PM	#82 (permalink)
enteroutside Junior Member Join Date: Oct 2009 Posts: 3	Re: SPEAKER WIRING actually the way 8240 is made (correct me if i'm wrong) is that 2 jacks come out of the speakers so i could connect them direct to the head amp (one of them). If i use a Y to connect both of them and then connect the single out to the head is this a series connection? 2x4 Ohm cabs - Y adapter - one 1x8 Ohm out to head. is it correct? if not how can i connect them i series having only one of the jacks as output?..sorry, is it clear what i'm asking? If not iìll try to be more specific. thanks

11-02-2009, 03:14 AM	#88 (permalink)
dudewheresmybass Junior Member Join Date: Sep 2009 Location: Gravesend, Kent Posts: 3	Re: SPEAKER WIRING thanks for your insight American Viking - cheers

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