OHM questions, please help.

santucci218 · #1 05-20-2010, 05:27 PM

First off, let me say that im pretty sure what my friend wants is impossible, but I'll ask the experts to make sure.

He has a Hartke LH1000 and a Hartke Hydrive 8x10. He also has two other 4x10's that are 8 ohms. He wants to be able to use them all at once with his head. I can not think of a good way to do this, and suggest he buy another head, but what do I know. So the output of that amp is 500 watts to a side, or 1000 bridged. The hydrive cab itself is 2,000 watts at 4 ohms! I mean, wouldnt it severely under power the 8x10 if he ran it off one side and then the two 4x10s off the other side. Also, how do you run two cabinets off of one output?

Thank you!

NateS · #2 05-20-2010, 05:36 PM

actually, as far as i know, he should be able to.

it won't underpower the 8x10, there's no such thing as underpowering.

he'd one the two cabinets by daisy chaining from the amp into the first 4x10, then out of that 4x10 into the second 8x10.

he could actually daisy chain all of them together, coin g out of one side of the amp, at 2 ohms.

as long as i'm right, that is. if i'm wrong, ignore me.

santucci218 · #3 05-20-2010, 05:43 PM

Quote:

Originally Posted by bassk81976

actually, as far as i know, he should be able to.

it won't underpower the 8x10, there's no such thing as underpowering.

he'd one the two cabinets by daisy chaining from the amp into the first 4x10, then out of that 4x10 into the second 8x10.

he could actually daisy chain all of them together, coin g out of one side of the amp, at 2 ohms.

as long as i'm right, that is. if i'm wrong, ignore me.

i think you mean from one 4x10 into the second 4x10.

sorry to be dumb, but how do you daisy chain cabs? would it be best to daisy chain the 1000 watts through all three cabs, or would it be better to daisy chain the two 4x10's on one side, and then just the 8x10 on the other side.

**butchblack** · #4 05-20-2010, 05:44 PM

Quote:

Originally Posted by bassk81976

actually, as far as i know, he should be able to.

it won't underpower the 8x10, there's no such thing as underpowering.

he'd one the two cabinets by daisy chaining from the amp into the first 4x10, then out of that 4x10 into the second 8x10.

he could actually daisy chain all of them together, coin g out of one side of the amp, at 2 ohms.

as long as i'm right, that is. if i'm wrong, ignore me.

The only thing he'd have to worry about is will his amp handle 2 ohms which is what he'd get if he daisy chained the 2 410's and plugged the 810 into a seperate outlet. If the amp will handle 2 ohms it should work OK.

santucci218 · #5 05-20-2010, 05:46 PM

i cant find much info about the amp online that says it runs at 2 ohms. The talkbass reviews say it does, but i haven't seen it anywhere else...

NateS · #6 05-20-2010, 06:09 PM

Quote:

Originally Posted by santucci218

i cant find much info about the amp online that says it runs at 2 ohms. The talkbass reviews say it does, but i haven't seen it anywhere else...

http://www.samsontech.com/products/p...fm?prodID=1942

this says it goes to 2x545 watts @ 2 ohms

and, if he daisy chained the 2 4x10s, then pluged the 8x10 into the other side, it'd be both sides putting out a 4 ohm load, right?

i'm not talking from personal experience, i'm waiting for my new amp to come, it has all the cool stereo amps and bridging mono and stuff...

Jaco who? · #7 05-20-2010, 06:25 PM

It will run 320 watts per side @ 4Ω. Each of the 4x10s will get around 160 watts max. Probably pretty much just as loud with just a 4 ohm 8x10 bridged, but all three would have a much more intimidating look and be much harder to lug around, if that's important to him.

NateS · #8 05-20-2010, 06:29 PM

oh, yea, that was one point i forgot to type - dasy chaining the 2 4x10s together that way, split to the side, they will each recieve half the wattts of the 8x10.

if you wire them all in parallel in one channel, then you'll be at 2 ohms and techncally getting the max out of your amp, but they won't all be playing all 1100 watts, they'll each have less, the 8x10 will be twice as loud as the 4x10s.

actually, no matter how you do it, the 8x10 will be twce as loud.

alot of it will be mainly for looks

santucci218 · #9 05-20-2010, 06:33 PM

Thank you!

lbwdog · #10 05-20-2010, 06:50 PM

owners manual: http://s3.amazonaws.com/samsontech/r...es_OM_v1_1.pdf

Although they give a 2 ohm power rating, they don't seem to encourage 2 ohm operation, so I'd say run the 8x10 cab off one side and the two 4x10s (4 Ohm net) off the other in dual parallel mode.

BTW; I've never been really comfortable running 2 ohm loads except with high quality amps such as Crown, QSC, or (believe it or not) the older Peavey CS series.

BassmanPaul · #11 05-21-2010, 09:49 AM

If you try to run separate cabinets from each side of a stereo amp set to bridge you'll have a whale of trouble with phase. If using each channel to drive a different cabinet then, parallel is the only way to do it. If you want to bridge a 2Ω/channel stereo amp then 4Ω will be your absolute minimum impedance.

Paul