top of page
SPK1 Primary above angle (MORE Black background).jpg

Automatic Amp/Speaker Selector

The Bobwire SPK1 is a high-power handling two channel (stereo) speaker level A/B switch. The SPK1 will automatically switch between two audio amplifiers and send the audio signal on to one pair of speakers (2 IN & 1 OUT). The Mode switch determines whether the SPK1 will operate by audio sensing or by a 12V trigger input. An alternative setup would have a single audio amplifier and the SPK1 will switch between two pairs of speaker outputs (1 IN & 2 OUT) but this is only possible in 12V trigger mode. The double thick copper circuit board traces and the highest quality gold contact relays ensure the purest audio signal path. The ultra-sensitive audio detection circuit is 100% analog & remains out of the signal path at all times.

When set to "12V Mode", an input trigger voltage of 3-15VDC may be used to activate the switch (instead of audio sensing). The 12V output is active whenever the B input is selected. This output can be used to control additional equipment such as more BobWire products.

The mode switch determines if the device will operate by audio sensing or 12V trigger input. In audio sensing mode, the SPK1 will automatically switch from input A to B when input B starts to play. In 12V Input mode the switch will be controlled by an external trigger voltage (3-15DC).

The sensitivity adjustment knob determines how loud the audio signal present at the B input needs to be before switching. The reset delay knob determines how long the device waits to switch back to the A input after the audio stops on input B.

The gold plated heavy duty binding posts ensure the purest connection. They accept up to 6AWG wire, bananas or spades.

©2024 by Bobwire Audio. San Francisco, CA, USA

bottom of page