BassPlaya Posted November 9, 2002 Share Posted November 9, 2002 lets say I'm running a head that is 250watts stereo 500 mono into two cabs. Lets say two 2x10. What would be the difference between running that with 8ohm cabs or 4ohm cabs? What is the pros and cons of each? Link to comment Share on other sites More sharing options...
rumpelstiltskin. Posted November 9, 2002 Share Posted November 9, 2002 first, power is rated based on the impedance of the speakers. so it won't be 250W into 4 ohms if it's 250W into 8 ohms. by using two 4 ohm cabinets, you will get more power and be, ostensibly, louder than if you used two 8 ohm cabinets. i believe there are good reasons to use 8 ohm cabinets and get an amplifier that can drive them, if you have the cash flow to make a choice like that. for example, 8 ohm cabinets will be tighter with bass, and they will be more accurate. the reason for this is that they draw less current per watt, so they won't overheat as quickly, they won't power compress (i.e. lose dynamic range and total volume due to heat) as easily. as for your original question, you'll get louder by using two 4 ohm cabinets, but that my fry your amp. the safe way is to use two 8 ohm cabinets. you'll notice the sound difference if you only use one of them -- not nearly as loud, but much cleaner and tighter. robb. because i like people. Link to comment Share on other sites More sharing options...
Mudbass Posted November 10, 2002 Share Posted November 10, 2002 The ony reason I can see to use two 4ohm cabs is if you're going to run them from each side of a stereo poweramp and the reason you'd want to do that is for bi-amping. But, when you're running 2 identical cabs bi-amping doesn't make any sense. Using two identical cabs you're better off with 8ohm cabs and bridging the power amp. You'll pick up about +3db of headroom and (theoretically) double the amp's slew rate. Link to comment Share on other sites More sharing options...
KikkyMonk Posted December 26, 2002 Share Posted December 26, 2002 rather than start a new topic I searched and found this which (sorta) answered my Q and spawned a couple more. I want to get an acme b-2, but want to be able to add the second one in the future if need be... so would this lead me to buy an 8 ohm one? What does bridging mean? I'm guessing it means combining the two channels in a stereo amp into one mono... In mudbass's post would the two cabs be ran in series or parallel? Anywho thats about it Dave Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.