john_the_bass Posted November 13, 2007 Share Posted November 13, 2007 Right - apologies if this has been asked before, I've been through the stickies and wiki at some length and I still can't find an answer (that I understand, anyway). I have an Ashdown ABM 300 EVO-II (or whatever it's full title is) - which apparently chucks out 325w at 4 ohms. I don't know what this figure is at 8 ohms, but I expect it to be roughly 50-60% of that. I run this through a single ABM Mini 15 8 ohm cab rated at 300w. What I would like to know is... If I run a second 8 ohm cab (I want a 210), how is the power split? Does 50% of the 325w go to each cab or does it depend entirely on the frequency of signal, how much power goes to which cab? My assumption is that I can use a 300 watt cabinet currently with my head as it is only producing power based on an 8 ohm load, and is therefore only producing say, 200w. I've probably simplified it, but if anybody can explain in words of one syllable that I might be able to understand, that would be great. Basically, I would like to add a 210, but would only do so if it meant I didn't have to replace my 15 as it isn't up to the job of handling the power. Quote Link to comment Share on other sites More sharing options...
gilmour Posted November 13, 2007 Share Posted November 13, 2007 I've been trying to understand all of this stuff recently, as I'm upgrading my rig for the first time in 10 years, I think I'm there (although don't take what I say as gospel). If you have 2 speaker cabs the power from the amp should split evenly between the two cabs. As for using your current cabs, this I'm less sure about, so I've deleted the response I just wrote... lol and have a similar query on another thread. The advice I've been consistently given is, if you hear distartion turn down before you damage the speakers, seems to have worked so far. Quote Link to comment Share on other sites More sharing options...
Merton Posted November 13, 2007 Share Posted November 13, 2007 Power splits evenly vs impedance. So 2x 8ohm cabs would share the pwer. That means if you have a 1x15 and a 2x10, both 8 ohm, the 10s will get 25% of the power each, the 15 will get 50% Quote Link to comment Share on other sites More sharing options...
john_the_bass Posted November 13, 2007 Author Share Posted November 13, 2007 Wicked that makes sense so in theory 15" gets 162.5 watts 10"s 81.25 watts each That's spot on that is - that means I won't have to get a 15 that can handle more than 300w. Cheers! Quote Link to comment Share on other sites More sharing options...
Dragonlord Posted November 13, 2007 Share Posted November 13, 2007 [quote name='john_the_bass' post='87809' date='Nov 13 2007, 02:03 PM']If I run a second 8 ohm cab (I want a 210), how is the power split? Does 50% of the 325w go to each cab[/quote] Yes. Go ahead and add a nice 8 ohm 210 with no worries! Quote Link to comment Share on other sites More sharing options...
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