![]() ![]() The reason is that it is not shielded, just 2 parallel wires per channel inside the plastic tube. We can see the significant difference in crosstalk, the supplied cable is much worse. The circuit is simple and is connected like this ![]() I have opened the box and made some reverse engineering as I wanted to know the schematic diagram of the switch box. There is also a 140cm long RCA to RCA stereo signal cable supplied with the box (comments later). I have fixed it by attaching of 4 self-adhesive small rubber boots to the bottom panel. Unfortunately there are no rubber pads at the bottom, so the little box happily slides on the surface where it has been placed. There is also a volume potentiometer knob between the switches. On the top there are two switches, one of them switches between channels 1 and 2 and the second one is a mute switch. There are 2 pairs of RCA-CINCH on one side and one pair of the same connectors at the opposite side, call it front and back panel if you wish. It is small and cute, built in a sturdy metal box. Mostly for the reason I was lazy to make a box and also for price reason, as the cost is as low as it does not make sense to waste my time by hand-making something similar. I needed a 1 IN – 2 OUT RCA selector switch for my small lab so after a short hesitation if to solder something myself or to buy some cheap product I have decided to order this: ![]() RCA Audio Switch Silent 2(1)-in-1(2)-Out Stereo RCA Switch Selector for Soundbar TV Speaker Headphones PC Game Consoles As a sound source I used Topping D10s DAC connected to PC via OLIMEX USB-ISO adapter (to avoid signal ground loop) and the measurement behind the switch box was done by modified Creative USB X-Fi HD. I used the 140cm RCA link cable supplied with the switch (called “Supplied cable” here) and the 100cm cable that was in the past supplied with some CD player (called “Generic cable”). I have quickly measured the RCA switch with RMAA and REW software. I would recommend to use this switch in case (b) only with volume pot turned full right, then it will load the source by 5 kohm. But, if the volume pot is turned full left, then the input impedance of this switch was measured only 12 ohm (10 ohm fixed resistor + residual resistance of the pot) and this may make a trouble to the sound source, loading it with very low impedance of 12 ohm. It will switch 1 sound source into 2 devices like 2 different amplifiers. It will switch 2 sound sources into one device like amplifier.Ĭase (b) may make a problem. It is advertised as bi-directional switch, it means it may haveĬase (a) is OK, we have 2 switchable input channels with volume pot of 5 kohm resistance. ![]()
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