Ortofon Libelle Turntable Spirit Level. Bullseye spirit level for setting your turntable & accurate mount level measurement. By simply placing the Libelle on top of your turntable, the Libelle can tell you how level your system is. From here it gives you the perfect indication of what part needs adjusting to give you a perfectly level turntable. Features: Precise bullseye spirit level by Ortofon. Helps level your hi-fi system. Aids in correcting any channel imbalance on your turntable. Specifications: Weight (g) 12. Dimensions (mm) 40 x 10 x 40. A spirit level like the Ortofon Libelle is vital if you want to make sure that your DJ turntable is set up perfectly level, which is important since a slightly lopsided set-up can lead to needle damage and playback speed discrepancies.