How dumb is this? Wiring 2 cabs in series. Help me.

[will33]

Originally Posted by sturoc

Right on thanks Will.

The labelling may be the confusing part, meaning 4 ohms minimum and not 4 ohms per jack. If your manual doesn't give a power rating for 2 ohms, it's not a 2 ohm amp.

Is this a newer Guitar Center Acoustic? If so, the speaker outs on the amp may already be wired in series, meaning you can plug a 4 ohm cab in each jack. Some folks on TB here with these amps say that's how theirs are wired, but I think that pertains to the combo amps ext. speaker jack. If it isn't clear in your manual, I'd call Customer Support and/or start a thread about it here. Your outs may already be in series and you've no need for a series cable, in fact, using one could really muck up the works.

[sturoc]

1987 B-2 ( 4th generation) Acoustic made by Wagner group -They were the first in line to buy Acoustic when it was first sold. It's a rare amp seems like not too many have them BUT they are built like tanks with some cool features Preamp in & out, f/x loop, direct out xlr, biamp outs etc etc.

The output for either jack is 4 min -like you said- or 8 ohms it's printed nxt to them on the panel. ...No manual no schematic

[will33]

Originally Posted by sturoc

1987 B-2 ( 4th generation) Acoustic made by Wagner group -They were the first in line to buy Acoustic when it was first sold. It's a rare amp seems like not too many have them BUT they are built like tanks with some cool features Preamp in & out, f/x loop, direct out xlr, biamp outs etc etc.

The output for either jack is 4 min -like you said- or 8 ohms it's printed nxt to them on the panel. ...No manual no schematic

I'd think that's a 4ohm amp then, and the series box/cable would be the solution. If the jacks aren't mounted to a PCB, you may just be able to take the cover off and look at the wiring. Or, with the amp off, hook up 2 cabs of known impedance, and take a meter reading to find out.

[bassmeknik]

Voltage is not "developed" across a load. The more proper term is "dropped" which roughly translates to "consumed". The amp "develops" the voltage and the speaker uses it. This is the definition of "voltage drop" when applied to a load.

Series connections are ok but as mentioned but if the cabs have crossovers there will likely be interaction between the two. IMHO

NL4 Speakon jacks are more commonly used in "bridged" outputs and in biamp setups, but manufacturers may also use them because they will also mate with NL2 plugs providing more flexibility in connector choices.

[will33]

Well, like many manufacturers, they may use 4-pin jacks when they only need 2, simply because it's cheaper to order a whole lot of one thing than it is to buy smaller quantities of different things. Hell, one of my old Carvin 115's I had, had a circuit board behind the jackplate with nothing on it, simply because it cut costs to get a whole bunch of those, even if you didn't need them, rather than having different plates/connections/wiring schemes for all the different cabs. It really was an empty circuit board with the juice running straight through. The jacks were PCb mounted and they just left out all the other components for the 115/no tweeter. Seems stupid, and I think it is, at least wasteful, but it's cheaper, so there ya go.

[BassmanPaul]

Originally Posted by bassmeknik

Voltage is not "developed" across a load. The more proper term is "dropped" which roughly translates to "consumed". The amp "develops" the voltage and the speaker uses it. This is the definition of "voltage drop" when applied to a load.

<Sigh> Ya try to put technical stuff into words that non technical folk can understand and someone has to whip ya for it!!!

[bassmeknik]

Originally Posted by will33

Well, like many manufacturers, they may use 4-pin jacks when they only need 2, simply because it's cheaper to order a whole lot of one thing than it is to buy smaller quantities of different things. Hell, one of my old Carvin 115's I had, had a circuit board behind the jackplate with nothing on it, simply because it cut costs to get a whole bunch of those, even if you didn't need them, rather than having different plates/connections/wiring schemes for all the different cabs. It really was an empty circuit board with the juice running straight through. The jacks were PCb mounted and they just left out all the other components for the 115/no tweeter. Seems stupid, and I think it is, at least wasteful, but it's cheaper, so there ya go.

I hadn't considered the cost of stocking multiple connector types, that makes sense. The actual cost difference between NL4 and NL2 is small enough that I would have to agree with you.

[bassmeknik]

Originally Posted by BassmanPaul

<Sigh> Ya try to put technical stuff into words that non technical folk can understand and someone has to whip ya for it!!!

No whip intended sir.

[BassmanPaul]

Originally Posted by bassmeknik

No whip intended sir.

Pity! We coulda got all kinky!

Fair enough my brother!

[will33]

Originally Posted by bassmeknik

I hadn't considered the cost of stocking multiple connector types, that makes sense. The actual cost difference between NL4 and NL2 is small enough that I would have to agree with you.

It happens a lot, especially when you have bean-counters agonizing over pennies per unit.