Frank, the 2150 was always reverred as a great bass amp in its' day and said to be able to drive anything. I knew guys that were running these amps bridged into Acoustats. As you know, bridged amps typically don't like low impedances. As you also know, Acoustats go VERY low at some spots. Never the less, the Perreaux's never flinched. That says a LOT about the build quality.
I remember when the 2150's first came out and the first thing that the dealer said was "you've got to hear the bottom end on this thing". He was right, as it was "rock solid". Both I and my Father agreed that it offered the best bass that we had ever heard up until that point in time. The 1150 was a little smoother but lacked the overall "oomph". Obviously, that was a few years ago : )
I currently have two of the 2150's bigger brothers. These came out a bit after the 1150's and 2150's and had some circuit revisions, changes / upgrades to the power supply, different parts layout, etc... I am specifically referring to the PMF-3150B's. These were conservatively rated at 300 / 500 wpc. Perreaux also released the 5150's ( 500 wpc ) and the much smaller 1050 at about the same time. Just for kicks a few years ago, i bought a 2150 to compare to the 3150's and see if my memory served me right.
MAN, did the 2150 sound anemic, hard, thin and glaring in a direct comparison. It also seemed to run out of steam WAY, WAY before the 3150 did. As such, i thought that i might have picked up a 2150 that was "funky" or way out of bias. As it turns out, i ended up talking to several folks that owned 2150's, some of them regulars here on A-gon. Most had very similar stories about their 2150's but some thought that they were smooth as can be.
As such, i have to wonder if something deteriorated very noticeably with age in these units, the factory had horrible quality control or if the 3150's were really THAT much better ??? While they did use similar circuitry with the same output devices, the layout and power supply was different.
I've often wondered how the SAE 2600 would stack up against my 3150's. My guess is that the Perreaux's would win. Have to check into that sometime soon. Sean