Boat Anchor Audio is offering a precision bandpass audio filter designed for the DIY audiophile or experimenter.
This is a custom configured 10-band single channel bandpass audio filter. This filter is strictly analog in design and is based on the reliable TL074 op amp. More info here.
We are also happy to announce we will soon be offering our new Virtual Ground (rail splitter) to provide positive and negative rails with a ground from a 2-wire power supply. More info here