I bought a TC Electronics RS212 and I love the tone and the light weight and am wanting to buy a second one, but the impedance is a little strange to me. It is rated for 8 ohms, but on a meter it reads 5.8 ohms. I emailed TC Electronics and was told that 5-6 ohms is normal on a multimeter, but that the impedance varies with frequency. While I do not doubt this, I still worry about using the cab (or cabs if I buy more) with my non TC Electronic amplifiers. Can anyone shed any light or experience on this? I run my Crown XTi 2000 bridged which has a 4 ohm minimum load, so 2 of these cabs metered will be below that. Will I be running the risk of damaging the amp or will the impedance take place at frequency and not be a concern? My other amps at this time are a Boogie D-180 (all tube) and Boogie Pulse 360 (solid state power) all of which have a minimum 4 ohm load. The Crown will drop to 2 ohms per channel if split.