http://www.sakurasystems.com/products/47selector.html
Features:
Complete mono structure with each channel encased in a separate chassis.
Rigid and compact aluminum chassis construction to ensure quick and smooth release of vibrations.
Separate grounding for each position.
Point-to-point hand wiring with 0.4 m/m solid OFC copper wire.
Specifications:
Input : 4 positions, unbalanced
Output : 2 pairs, unbalanced
Dimensions : 170(w) x 40 (h) x100(d) m/m
Compatibility:
Any associated components with RCA connectors.