All: Purchased a set of USB-powered PC speakers which turned out to be very noisy on HF. The speakers are made by Mica model PB20i. See: https://www.amazon.com/gp/product/B07VTS62L6/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1 Tony - K2MO