Aguilar DB751 and mixed impedance

[JSandbloom]

Here is a stupid question, I have a DB751 that I use with a 4 ohm DB410 cab. I looking at stacking another DB410 on top and have the opportunity to get one semi locally for pretty reasonable, however it is 8 ohms. Running the two would do 2.66 ohms. I know the amp can do 2 ohms. Not sure if running at the exact ohm level will do any damage to the amp. Should I be good running at that impedance?

 

[Sid Fang]

Here is a stupid question, I have a DB751 that I use with a 4 ohm DB410 cab. I looking at stacking another DB410 on top and have the opportunity to get one semi locally for pretty reasonable, however it is 8 ohms. Running the two would do 2.66 ohms. I know the amp can do 2 ohms. Not sure if running at the exact ohm level will do any damage to the amp. Should I be good running at that impedance?

If it's good at 2, it's fine at 2.66 Ohms. I'd be more worried about the power distribution vs. power handling capability of the two cabs. One of them will get a whole lot more power than the other, and start farting out, or even cooking up, before the other gets very loud.

 

[ahc]

If the amp is rated to go down to 2 ohms then 2.66 is fine. You can't go below an amps minimum ohm rating. You should be aware though that you will not get equal power from two cabs of differing impedance. The 4 ohm cab will receive more power (twice the power) than the 8 ohm cab will.

 

[JSandbloom]

So sounds like I may want to just fork up the extra money for a 4 ohm cab. Would like them to both get the same amount of juice.

 

[TMARK]

So sounds like I may want to just fork up the extra money for a 4 ohm cab. Would like them to both get the same amount of juice.

I would. The 751 has lots of power. Running an 8 and a 4 Ohm wouldn't get that much more power than running the 4 Ohm by itself. You would get more volume over all but would be limited by the clean volume from the 4 Ohm cab.

 

[chris_b]

While I would prefer 2 cabs of the same rating, if an 8 ohm cab is available locally at a good price I'd still check it out.

I would treat this as a 2 x 8 ohm cab rig. You'll get more volume out of 8 speakers than you'll get out of 4 no matter what the ohms rating is. The power section is MOSFETs so you can connect any cab combination over 2 ohm without causing any damage and you're unlikely to do any damage to either cab as they are both rated at 700watts each. Which should be comfortably within sensible volume levels.

Nothing is in danger of damage or bad sound in your mixed cab proposal. If you need more info I'd call Aguilar and ask them.