From 1966 to 1971, Lowrey produced combo organs for the guitar maker Gibson. The most popular of these was made in 1966, called the Kalamazoo K-101, but was soon renamed the Gibson G-101. The Gibson branded organs' design and circuitry were based on Lowrey's "T-1", "T-2", "TLO-R" and "Holiday" spinet models. They had several additional features that made their sound distinctive from the Lowrey models. The extra effects included "Repeat", "Glide", and "Trumpet Wow-wow".