[marcomolhoek]

Hello

At the moment i have a 4b3 and quite happy with it. but thinking about a little more power to the speakers, (T+A Creterion 2e) So buy an extra 4b3 and put it in bridge mode or exchange everything for 2 x 7b3. I understand that supplying power from a bridge 4b3 is different than a 7b3. Can someone explain that to me?

[Ron D]

I think in general when you bridge an amplifier it then sees speakers at half their rated ohm value so if you have 4 ohm speakers a bridged 4B will see it as a 2 ohm load and can well strain the amp. You will be better served by getting a pair of 7Bs . I speak from some experience having owned a 4bst, 14Bsst and 7B2 amps in the past. The one thing I noticed when I moved from the 4B to 14B was how much more detail was conveyed at lower volumes. As is always the case YMMV....

[NekoAudio]

I also agree that for your speakers, it is probably best to get a pair of 7B3 instead of running a pair of 4B3 in bridged mode.

[gil99]

Go with 7B3.

[Highendfool]

Another vote for the 7B3’s

[marcomolhoek]

I think in general when you bridge an amplifier it then sees speakers at half their rated ohm value so if you have 4 ohm speakers a bridged 4B will see it as a 2 ohm load and can well strain the amp. You will be better served by getting a pair of 7Bs . I speak from some experience having owned a 4bst, 14Bsst and 7B2 amps in the past. The one thing I noticed when I moved from the 4B to 14B was how much more detail was conveyed at lower volumes. As is always the case YMMV....

Thanks for the explanation.

merry Christmas to you all