Teenage Engineering and Ikea partnered to create the Frekvens line of audio products. Including this tiny speaker with both 1/8" and Bluetooth audio inputs. I reversed the pocket clip and attached it to an out of production 30" metal shelf . The results are a beautifully noisey plate reverb . I just need to add a pickup mic at the bottom of the shelf and this element of the KlangFasa will add an added dimension to this Sound of Horror Apprehension Engine