Not totally correct. The rl140 used foam surrounds, and the rl7000 rubber surrounds. If you compare the crossover they are the same. But the rl60 has a passive membrane and the rl60 w has a bassreflex. Im gonna refoam my rl140’s with rubber you and not with foam. If the flexibility for both surrounds is the same, just take the most durable ones…lesser sensitive to temperature and moist fluctuations. Ok
Beovox RL140: Login to view image
Beovox RL7000: Login to view imageThe woofers are identical. The rest - not quite, I think. Rubber may last longer (or it may not, depending on the type of rubber), but if you measure the drivers T/S parameters and compare foam and rubber, you will be surprised to see how much of a difference it makes. In some cases it will end up an almost completely different driver. I would stay with foam where foam was originally used.
And keep in mind to let newly refoamed woofers play for some hours before judging/comparing. They will almost always be a little stiff and sound a bit "stubborn" or "tame" at first, and they will need to losen up a bit to do their job as intended. And don't compare to how they sounded with the old, partly disintegrated foam, as having the woofers cones flapping around undampened and uncontrolled, as they would be, will also be far from what was intended with T/S parameter readings everywhere and nowhere.
Martin
