The Studer A80 is a tape recorder that shapes sound by softening transients and adding organic saturation. It works only when configured precisely: 19/38 or 38/76 cm/s, 1/2-inch tape, GP9-aligned heads. It excels in rock. It fails in dance, house and electro. It is not flexible. It is not neutral. It is a deliberate, physical constraint.
The Studer A800 is a UAD-2 plug-in that adds tape-style warmth and drive to digital mixes. It works best post-summing. It uses gang control for unified management. It does not simulate physical tape mechanics.
The Studer A807 is an analog multitrack recorder. No technical specifications exist for it. That absence defines it.
The Studer A810 is an analog multitrack recorder that functions reliably in steady-state operation. But it fails sharply and obscurely after power interruptions. Troubleshooting those failures is very hard. One user explicitly prefers the A807 over the A810. Nothing is stated about its format, track count, year introduced, or what recordings were made on it.
The Studer A820 is a 24-track analog multitrack tape machine with a portable controller. It excels at low-end and drum capture. It was used to record tracks later transferred to Pro Tools. It is user friendly, with familiar, easily located controls. No verified source states a weakness.
The Studer A827 is an analog multitrack-studio. No technical specifications are provided. Its function, design, and use remain undocumented in the source.
The Studer B67 is an analog multitrack recorder. No technical specifications are available for it.
There is no musical instrument called 'Studer'. Studer is a Swiss maker of professional audio hardware — tape recorders and mixing consoles — designed for studio and broadcast use. It does not make sound. It routes, records, and mixes it.