The Simco 4x4




The ultimate audio input switcher for audiophiles and high-end retailers. 

The Simco 4x4 is a premium audio input switcher designed for high-fidelity audiophile listening, offering seamless switching of multiple audio sources into multiple amplification setups. The Simco 4x4 enables enthusiasts and professionals to easily compare high-fidelity audio sources on various power setups. Featuring 4 inputs and 4 outputs, it allows effortless switching between sources like vinyl players, DACs, and other devices, into multiple outputs. Connecting your sources seamlessly to various preamplifiers with no loss of fidelity.

What sets the Simco 4x4 apart is its use of 6N7 tubes, delivering warm, rich sound with exceptional clarity and fidelity, paired with an external power supply, ensuring clean, noise-free performance, elevating the listening experience to new heights.

Crafted for enthusiasts who demand precision and quality, the Simco 4x4 combines versatile functionality with extreme audiophile-grade sound, making it the perfect centerpiece for any high-end audio setup.





Dual 6SN7 Unity gain stereo buffer and input/output selector, featuring:


2x Active loaded 6SN7 voltage followers with drive capability for long cable length and/or low input impedance amplifiers

2x Linear regulated B+ Supplies

Linear regulated heater supply
Dedicated External isolated power supply
Dedicated buffer/selector 4x IN and 4x OUT

 Red Oak Side Panels
Hand made and point to point wired