Before i go blowin' stuff up....stewart 1.2 ohms?

[sailorofcheese]

okay.....
just making sure im reading the manual right.

stewart's site for 1.2 says the following
4 Ohm Stereo Power 350W
8 Ohm Stereo Power 200W
4 Ohm Bridged Power 1000W
8 Ohm Bridged Power 700W

ok so is that...
4 Ohm Stereo Power 350W (350w delivered to each 4ohm cab?)
8 Ohm Stereo Power 200W (200w delivered to each 8 ohm cab?)
4 Ohm Bridged Power 1000W (1000w delivered to 1 4ohm cab?)
8 Ohm Bridged Power 700W (700w delivered to 1 8ohm cab?)

im just being paranoid. i'd appreciate your reasurrance

-steven

[sailorofcheese]

im particularly concerned with the bridged power

[Plays_For_Dog]

Email the cab manufactorer? I'd love to help you more then that, but I'm not so sure myself. My spidey sense tells me you are correct. Bridged would put all the power from two series into one out put and any one cab or multiple cabs that are daisy chained to it. However, I believe the more cabs daisy chained into the bridged output will absorb more wattage and thus lessen the amount to each individual speaker.

Don't take my word for it though. Keep bumping till someone who knows their wattage answers. I'm gonna suscribe to see if I get corrected because I should know this and I'm not totally sure about it.

[Rick Auricchio]

Your conclusions are correct.

But there are other possibilities.

For example, run 1000w bridged into a pair of eight-ohm cabs. The cabs impart a combined four-ohm load to the amp.

And remember that you can still destroy speakers well below their max power ratings.

[Wes Whitmore]

You seem to have it. Dont confuse bridged and stereo with connecting in parallel, series, or daisy-chained. These all get tossed around here pretty often.

Bridged and Stereo are amplifier output terminologies. Stereo refers to two separate amps channels driving two separate inputs( usually), and connecting two separate speaker loads on 2 separate output channels. Bridging is combining the 2 amplifier channels to make 1 more powerful single output channel, and connecting it to one speaker load. Generally when you bridge an amp, it makes 2x the power, but has to do it at a higher ohm load. That's what you are seeing there. Also, that amp will probably do a 2 ohm stereo load safely.

http://www.stewartaudio.com/manuals/...-%20Manual.pdf


Parallel and daisy chaned usually mean the same thing. They are speaker connection terminologies. Connecting two cabs to the same amplifier channel in parallel to drop the ohm load and make more power from an amp channel is parallel. A series connections is connecting one cab with another cab to raise the ohm load and generally make less power out of the amplifier.

Wes

[sailorofcheese]

Originally Posted by Rick Auricchio

Your conclusions are correct.

But there are other possibilities.

For example, run 1000w bridged into a pair of eight-ohm cabs. The cabs impart a combined four-ohm load to the amp.

And remember that you can still destroy speakers well below their max power ratings.

hmmm. are you referring to daisy chaining two 8ohm cabs with the bridged 1000w, a total 4ohm load? just wanted to clarify that.

how would i destroy the speakers without overpowering them? i know underpowering cabs could hurt the amp. mismatching ohm impedances?

[sailorofcheese]

Originally Posted by Wes Whitmore

You seem to have it. Dont confuse bridged and stereo with connecting in parallel, series, or daisy-chained. These all get tossed around here pretty often.

Bridged and Stereo are amplifier output terminologies. Stereo refers to two separate amps channels driving two separate inputs( usually), and connecting two separate speaker loads on 2 separate output channels. Bridging is combining the 2 amplifier channels to make 1 more powerful single output channel, and connecting it to one speaker load. Generally when you bridge an amp, it makes 2x the power, but has to do it at a higher ohm load. That's what you are seeing there. Also, that amp will probably do a 2 ohm stereo load safely.

http://www.stewartaudio.com/manuals/...-%20Manual.pdf


Parallel and daisy chaned usually mean the same thing. They are speaker connection terminologies. Connecting two cabs to the same amplifier channel in parallel to drop the ohm load and make more power from an amp channel is parallel. A series connections is connecting one cab with another cab to raise the ohm load and generally make less power out of the amplifier.

Wes

thanks for the great input

this is what the manual says
"500Wx2@2? per channel
350Wx2@4? per channel
200Wx2@8? per channel
1000Wx1@4? bridged
700Wx1@8? bridged"

that doesnt seem like i could daisy chain two 4ohm cabs in bridge or MONO mode. that would drop it down to a 2ohm load since its just one combined channel. i cant find anywhere in the manual that say it can handle 2ohm loads

[RickenBoogie]

I don't think it can handle a 2 ohm load. You could only use 2 4 ohm cabs in stereo, not bridged. And, fyi, underpowering is a falsity. Not true. A myth. Scientifically proven wrongness. And overpowering is for real. The cab's rated power handling does not tell the whole story. It's a matter of frequencies, especially the low bands, that can kill a speaker.

[Wes Whitmore]

I think its on page 3....2 ohm stereo stable.

[kosmicwizard]

Originally Posted by sailorofcheese

okay.....
just making sure im reading the manual right.

stewart's site for 1.2 says the following
4 Ohm Stereo Power 350W
8 Ohm Stereo Power 200W
4 Ohm Bridged Power 1000W
8 Ohm Bridged Power 700W

ok so is that...
4 Ohm Stereo Power 350W (350w delivered to each 4ohm cab?)
8 Ohm Stereo Power 200W (200w delivered to each 8 ohm cab?)
4 Ohm Bridged Power 1000W (1000w delivered to 1 4ohm cab?)
8 Ohm Bridged Power 700W (700w delivered to 1 8ohm cab?)

im just being paranoid. i'd appreciate your reasurrance

-steven

Yes that is how much that head will deliver into either an 8 or 4 Ohm load. 1000 watts into a 4 Ohm cab is a lot, my 810 can only take 800, make sure to listen to the speakers so you don't blow them up. Cheers.

[kosmicwizard]

Originally Posted by sailorofcheese

thanks for the great input

this is what the manual says
"500Wx2@2? per channel
350Wx2@4? per channel
200Wx2@8? per channel
1000Wx1@4? bridged
700Wx1@8? bridged"

that doesnt seem like i could daisy chain two 4ohm cabs in bridge or MONO mode. that would drop it down to a 2ohm load since its just one combined channel. i cant find anywhere in the manual that say it can handle 2ohm loads

you can't MONO down to 2! BUT you can run a 4 on each side. This is exactly the same as the Ampeg B4r I had, and the Hartke LH1000 everyone loves. Cheers.

[Wes Whitmore]

You can bridge the amp to 4ohms, stereo to 2ohms...

[BurningSkies]

Originally Posted by sailorofcheese

i know underpowering cabs could hurt the amp.

This. And remember, if anyone tries to tell you that Santa isn't real, it's a filthy lie.

[Rick Auricchio]

Originally Posted by sailorofcheese

how would i destroy the speakers without overpowering them?

You can destroy a speaker mechanically by pushing it too hard, even if it can still handle more wattage without burning out. When a speaker farts out, that's when you have to back off. With most cabinets, you'll reach this point well below the cab's max wattage.

i know underpowering cabs could hurt the amp.

No such thing. Underpowering doesn't hurt amps or cabs. Otherwise we would never be able to turn down the volume without causing damage.

[sailorofcheese]

Originally Posted by Rick Auricchio

You can destroy a speaker mechanically by pushing it too hard, even if it can still handle more wattage without burning out. When a speaker farts out, that's when you have to back off. With most cabinets, you'll reach this point well below the cab's max wattage.


No such thing. Underpowering doesn't hurt amps or cabs. Otherwise we would never be able to turn down the volume without causing damage.

true. i'll just make sure to keep an ear open

[sailorofcheese]

Originally Posted by Wes Whitmore

You can bridge the amp to 4ohms, stereo to 2ohms...

that sounds more like it. thanks

[Bob Lee (QSC)]

Originally Posted by Rick Auricchio

You can destroy a speaker mechanically by pushing it too hard, even if it can still handle more wattage without burning out. When a speaker farts out, that's when you have to back off. With most cabinets, you'll reach this point well below the cab's max wattage.

That would be from too much low-frequency energy. Cone excursion increases when frequency decreases, and you could reach a point where the voice coil former bottoms out even though the power into the driver is within its ratings. So watch out for low-end boost; too much could cause loudspeaker damage.

[sailorofcheese]

thanks bob!