High passed, something wrong, or really that hard to drive?

dnoyeB

Its not just the HPF but also the power consumption difference.

The LSi25 is a 300W speaker.
The LSi7 is a 150W speaker.

They may produce the same volume @1W, but I doubt the volume curve looks the same. I expect the 7 to be steeper.

You could bi-amp the LSi25s if your amplifier has the capability.

Face

Care to elaborate?

dnoyeB

What song is that playing?

dnoyeB

Face wrote: »

Care to elaborate?

Maybe not. On second look, the bottom speaker of the LSi25 is conspicuously absent from the video... That's the one designated to plan frequencies below 80Hz. I'm not a musician so I can't tell you off hand what frequency is playing during the video.

JimAckley

The LSi25s are not bi-ampable.

The song playing is something I wrote like 6 years ago.

The low driver of the LSi25 is designated to play lower frequencies, but it's really not crossed all that much lower than the upper driver. The LSi25s whole low circuit is high-passed with a 500uf cap, so it's not receiving anything close to the same signal as the LSi7.

It's definitely not lowpassed @ 80, because the subwoofer is there to take care of all of that. That lowpass filter would be applicable for something like the LSi9 or LSiC, neither of which have a subwoofer, have PowerPorts in the back tuned for those lower frequencies, and in the case of the LSi9, have a much larger internal volume (the 25s have a back wall about 2/3s back from the front of the enclosure).

In short, what I learned from all of the experimenting and reading I've done is that the upper sections of the 25s are most definitely not designed to facilitate full-range operation on their own, but to incorporate the subwoofer to achieve that.

And fyi the bass "drum" is tuned around the 45Hz, give or take a little.

dnoyeB

That's good info. And I like the music too.