Here is a small, simple and passive device, called “Passive Switch Box” (available in two forms: PSB2-1 and PSB2-1R), to simplify your audio comparison tests (A / B tests) between 2 audio components such as 2 headphone amplifiers, 2 DAC, 2 sources or even 2 interconnect cables.
Once correctly connected with your audio components, the PSB2-1 and PSB2-1R will enable easy switching of the 2 connected inputs using a single toggle switch.
The PSB2-1 and PSB2-1R are very simple to use, and due to their simple but yet high quality internal connections, they are completely transparent and doesn’t modify the input signals. The differences you may hear between “A” and “B” are due to the different devices you are comparing, so trust your ears, and decide for yourself if “A” is better than “B” !
In order to optimize the use for different A/B tests possibilities, the Passive Switch Box is available in 2 different forms with different inputs and output terminals (1/4″ jack or RCA): the PSB2-1 and the PSB2-1R. (click here for more information)
Here are 3 examples: (click on the desired link below)
- How to make reliable A/B comparison tests between 2 DAC ? Use the PSB2-1R, or the PSB2-1 with adapters [RCA to 1/4″ jack]:
- How to make reliable A/B comparison tests between 2 interconnect RCA cables ? Use the PSB2-1R with the ICTester Box, or the PSB2-1 with adapters [RCA to 1/4″ jack] and the ICTester Box (available soon…)
Some wiring diagrams:
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