One way to do it is connect the
Primaluna Prologue Classic intergrated amp
speaker output to a speaker selector:
http://www.nilesaudio.com/product/standard-speaker-selector-four-pairs-speakers-FG01039
Please read the installation and operation guide carefully for using tube amp:
http://www.nilesaudio.com/product/standard-speaker-selector-four-pairs-speakers-FG01039
Please read the installation and operation guide carefully for using tube amp:
Using the SS-4 with Tube-Type Amplifiershttp://resources.corebrands.com/products/FG01039/pdf_FG01039_SS-4_manual.pdf
Virtually all tube amplifiers must have a load connected at all times. If the amplifier to be connected to the SS-4/SS-6 is a tube amplifier, be sure to always have at least one pair of speakers switched on at all times. An alternative is to permanently connect a 150 ohm, 5 watt resistor across the tube amplifier’s output in parallel with the SS-4