addition of 2nd pair of speakers

Bryston speaker selector boxes. Can get them in two or three or four pair speakers. The two and three pair type also has the feature of a headphone output. Little to no loss in my use. Only gripe would be the speaker ternminals are very close together, best to use banana plugs.

Pgawan2b..
In my case I used the Bryston 2 way selector box to at times run one pair of speakers, at others to run both at same time. As many amps/pre have no headphone output, I used it for headphone use as well. For more info if not found on the Bryston web site, one might check the audio advisor site. The Bryston works well, and seems built to last, with excellent sound quality. As with all such type, they present your amp with the proper load to protect the amp, and drive the speakers properly. Some units have a hi/low power switch, as is the case of the Russound speaker selector box with headphone output I also have. This older unit would seem dated as it uses a barrier strip for the speaker connections. I also believe Parasound makes a speaker selector box.

Bryston unit does not provide protection for speaker or amp. It is only a switching device. I mis-spoke in my earlier post on the protection segment. Thanks to rantes7 for bringing it to my attention, he having checked with audioadvisor. My checking the unit and the schemactics confirm such. The unit made to provide the best sound quality possible. The protection left to proper matching of sets of speakers, ie using both 8 ohm speaker pairs. Along with amp that could handle 4 ohm load when necessary. My experience with my gear has never encountered any problems. I've used the Bryston with different sets of gear.
The Parasound unit according to AA has impedence matching.
Sorry for any confusion and thanks once again to rantes7 for bringing it to my attention.