With the controls for relative volume level on surround sound recievers the balance of sound wil not be a problem. As long as the front there are the smame or very similar the sonics should not be a problem. If your reciever is of reasonable quality the ability to run nominal 6 ohm speakers should not be a problem.
The differential between efficiencies coulds be an issue but probably no. Most Kefs are in the 91-93 db range and I don't know the specs of Quads. Usually the only efficeny issues are with speakers that are 8-10+ db appart.
Good luck!
The differential between efficiencies coulds be an issue but probably no. Most Kefs are in the 91-93 db range and I don't know the specs of Quads. Usually the only efficeny issues are with speakers that are 8-10+ db appart.
Good luck!