Dogstar wrote:As much as I really enjoy my ST-120 i am a bit jealous of you M125 owners. Not to hijack the thread but would two ST-120's that are hooked up bi-amp ready speakers be close to equivalent performance wise to a pair of M125's?
Unfortunately not, because of the quirks of biamping. Would hardly be any different versus a single ST120.
Power wise it may look the same on paper, but consider what is happening to that power. You physically separate the bass unit(s) from the mid and high freq drivers. Then you allocate each 60 watts. 120 watts total, so same as M125, right? Well no. In the biamp configuration the bass driver is limited to 60 watts. In a non biamp configuration with M125's it can pull a lot more then 60w from the 125 watts that's on tap. The guy who needs it, the bass driver, really isn't seeing hardly anymore then he was before with a single ST120. So the extra 60 watts goes largely unused since the other drivers don't demand a lot. This unequal power demand is what defeats a lot of biamp attempts.
Now if you bridge the ST-120's to mono (assuming one can do that, I see a stereo/mono switch?) and use one per each channel, now its basically equivalent. And will sound much better then the same two units in a biamp configuration because the power can go to where its most needed.
The very unequal power needs of the various drives is why biamp folks often like to combine a low power tube amp with a beefy SS amp for the bass. But then you need an external crossover for it to work properly. When identical amps are used you can get away without an external crossover, but is rarely an efficient use of amps for the reasons cited above.