I do not know who makes all the Insigna products but I know back in the days when I bought a DIGITAL to ANALOG converter the Insigna was a re-painted Zenith
Now Zenith 50 years ago, their ads were "The quality goes in before the name goes on" and independent lab testing rated zenith TV's for example as the best in the business picture wise.. if you were willing to work for it. (I had one, agree)
Today Zenith is owned by LG (Lucky Goldstar) and I've never been Lucky enough to be happy with a goldstar Product.. In fact I've been royally ticked off by them.. That includes the Insignia Converter, My RV's Zenith VCR (never worked right) And Dometic Microwave (Works right now, but that's cause I fixed it, had to re-engineer a couple things) or the older MIcrowave at the office (Caught fire by design) or the monitors I sold in the Comptuer store (Most common returned under warranty item we sold).
NOT a fan of LG products as you can guess.