daisy chain?

Rather than lugging around a big ol 810, you can get 4 four ohm 210s. That way you can use 1, 2, 3, or all four safely. You would daisy chain them in pairs, creating two eight ohm loads which would make a ofur ohm load together

 

ok, now i'm confused....if daisy chaining two 8 ohm cabs gets you a 4-ohm load....then why not just go stereo and plug each cab into an output?

 

Series vs. Parallel...

Most two jack cabinets (or amps) have the jacks connected in parallel. What this means is that either speaker will continue to function if the other one dies or is disconnected. A similar set up is a light fixture with more than one bulb. If one bulb burns out, the other one(s) stay on. The bulbs are in parallel. The total impedance that an amp sees when the speakers are in parallel is always less than one of the cabinets individually.

If the speakers are in series, the total impedance goes up (it's the sum of the cabinet inpedances). If one speaker blows or is disconnected, they are all shut off. Think Christmas tree lights now, where if one bulb burns out, they all go out.

Kennyhoe...an amp running in the bridged mode puts to paralleled cabinets puts out more power than it would if the cabinets were each connected to thier own power amp channel. It's an electronic way of tricking the amp into thinking that you're running at a lower impedance than you are. If you look at stereo amp specs, it's output briged into 4 ohms is usually the sum of its per channel rating at 2 ohms.

If the power amp can't handle a 2 ohm load per channel, it will probably be limited to 8 ohms in the bridged mode (because each channel is "seeing" a 4 ohm load).

Clear as mud?

 

Good lord. I was right, don't go steering him wrong

 

4 ohm 210 - 4 ohm 210
/
AMP = 4 OHM LOAD
\
4 ohm 210 - 4 ohm 210

 

I'm not sure what you're showing us, but if I read your drawing correctly, two sets of 4 ohm cabinets are daisy chained together then connected to the amp.

If this is correct, each pair of 4 ohm cabinets becomes a 2 ohm load and then the amp sees only 1 ohm. Unless its a MacIntosh MC2300, it isn't going to be very happy...

 

My diagram is dual mono

 

so this is a possible way of running 4 cabs if your AMP only has 2 outputs for cabs??? Like, say your amp can take a two ohm load, you can daisy chain 2 8 ohm cabs from each output so you can have a total of 4 8 ohm cabs?

 

That would give you an 8 ohm load all together.

 

Wrong, that would end up being a 2 ohm load to the amp.
2x8 ohms gives you 4 ohms per output on the amp.
2x4 ohms is a 2 ohm load.

Outputs on a mono amp are wired in parallel, as are the connectors on cabs.

Now in theory it would be possible to wire two of the cabs in series with each other per side giving you 16 ohms per output on the amp. This would give you a total load of 8 ohms.
You would need to create custom cables in order to do this though.

 

2x8 ohm load daisy chained is 16 ohms, not 4. My cabs have an iin and an out for daisy chaining.

 

What kind of cabinets do you have? All the cabs I've seen have the jacks in parallel. What you describe has the jacks in series.

I just figured out a way to use two 1/4 in. jacks (one of them a switching jack) to connect the second cabinet in series with the first (and still have to original speaker function when the second one isn't plugged in), but I'd be surprised if any bass cab mfr. does that...I sure wouldn't want to for high power applications.