The Klein & Hummel UE 1000 is an early 1970s era programme equaliser built by the German firm Klein & Hummel in Stuttgart. Intended as a professional mastering and programme EQ, the Klein & Hummel UE 1000 follows the design philosophy of the earlier tube UE-100 but in a solid-state, discrete implementation; it was produced as a single-channel unit and commonly found and sold in matched pairs for mastering and cutting tasks.
The Klein & Hummel UE 1000 offers selectable filter topologies including low-pass, band-pass and high-pass sections and uses discrete networks rather than simple shelving controls, which gives the Klein & Hummel UE 1000 its characteristic programme-style response suitable for precise tonal shaping during mastering.
Physical build is robust, with a metal case and a size suited to desktop or rack mounting in a wooden outer frame when paired. Original service documentation and schematics survive and confirm the discrete transistor/FET circuitry and the detailed network boards used in the design; these schematics are available online in scanned/manual form.
The Klein & Hummel UE 1000 has become sought after by collectors and mastering engineers for its musical programme curves and vintage character, and surviving units most often appear on specialist secondhand pro-audio markets as paired mastering channels.
Features
- Discrete transistor/FET circuitry: networked equaliser topology for programme use.
- Selectable filter topologies: low-pass, band-pass and high-pass sections.
- Mono channel design: commonly sold and used as matched pairs for mastering.
- Robust metal chassis: built for professional studio use and long service life.
- Service documentation available: original schematics and repair manuals exist online.