Any interest in DIY at all?
I have been considering a device such as these for my garage setup.
Yuan-Jing Cirrus Logic CS3310 Remote Control Preamplifier Kit with LCD DisplayYuan-Jing uses Cirrus Logic's CS3310 to create this low-noise digital volume control (that has less than 0.001% distortion) that has amazing stereo separation -- better than 110 dB of separation -- while being able to...
www.parts-express.com
12 VDC Bluetooth 4.0 FM Radio MP3 WAV FLAC Audio Preamp Board with Function Cables and Remote
www.parts-express.com
PT2313 DC 12-24V IR Remote Control Tone Preamp board with 3 Aux InputsThis audio preamp board has multiple features to enhance any audio project. With three selectable line inputs switch between FM radio, Bluetooth, 3.5 mm or RCA jacks. The digital display shows which AUX input you're listening...
www.parts-express.com
There are also standalone digi volume control options.
Sure Electronics AA-AB41147 Digitally Controlled Stereo Electronic Audio Volume Control Board
www.parts-express.com