The tenor's can EASILY drive the Vandersteen 5a. Why ? Because to an amp, a vandersteen 5 looks like a monitor speaker.
There is a vandersteen high pass filter box that goes between the preamp and amp. This filter removes 6db of the subwoofer's range (100hz on down ?), so the amp is not required to produce bass notes. Later inside the van 5's crossover, the 6db are added back to the low range before being fed to the internal subwoofer amplifier. That's one of the best design characteristics of the van 5.
There is a vandersteen high pass filter box that goes between the preamp and amp. This filter removes 6db of the subwoofer's range (100hz on down ?), so the amp is not required to produce bass notes. Later inside the van 5's crossover, the 6db are added back to the low range before being fed to the internal subwoofer amplifier. That's one of the best design characteristics of the van 5.