The 7B ST has a voltage versus current switch on the back. The switch should be set to current if the impedance of your speakers dips meaningfully below 3 ohms over part of the frequency range. Higher impedance loads are driven with the switch set to voltage. The current setting might be appropriate for your SoundLabs. I don't think the 4B STs have this option.
Bryston 7BST or bridged 4BSTs
I have the feeling/impression that a bridged 4BST is same as, or at least similar to, a 7BST, since advertised power outputs are the same.
Can anyone confirm or refute this?
If there is a difference, what are the advantages/disadvantages of using one or the other?
BTW---I'm powering SoundLab A3s, which I realize can be problematical impedance-wise.
Can anyone confirm or refute this?
If there is a difference, what are the advantages/disadvantages of using one or the other?
BTW---I'm powering SoundLab A3s, which I realize can be problematical impedance-wise.