Wohler Technologies LM106-6 Analog 6-Channel Level Meter 1RU Rackmount VU PPM

Wohler Technologies LM106-6 Analog 6-Channel Level Meter 1RU Rackmount VU PPM

The Wohler Technologies LM106-6 is a 1RU rackmount analog 6-channel audio level meter designed for professional broadcast and production environments. It features three independent 2-channel, 106-segment tri-color LED bargraph displays and delivers simultaneous VU and PPM ballistic monitoring across all six channels at once. Configuration is handled via rear-panel DIP switches, with a front-panel brightness trim control for display adjustment.

Specifications & What's Included

• Model: Wohler Technologies LM106-6
• Form Factor: 1RU rackmount
• Channels: 6 analog (three 2-channel input pairs)
• Displays: Three 106-segment tri-color LED bargraphs (one per 2-channel pair)
• Display Ballistics: Simultaneous VU and PPM
• Dynamic Range: 70 dB usable
• Scale: -56 to +16 dB (standard scale)
• Extended VU Scale Resolution: 0.5 dB midscale
• Sampling Rate: 48 kHz on analog input
• Gain Calibration: 4-stage
• Brightness Control: Adjustable front-panel bargraph brightness trim
• Configuration: Rear-panel DIP switches (S1–S4) controlling termination, amber/red boundary, PPM hold/float, and Vpeak display timing
• Input Connectors: Screw-down terminal blocks — CH.A(L) / CH.B(R) per pair (3 pairs total)
• Power: 100–240 VAC, 50–60 Hz (IEC inlet, universal voltage)
• Includes: Unit only — no cables or accessories

Applications

Rackmount analog level meters like the LM106-6 are standard tools in professional audio signal chain monitoring. The LM106-6 was designed for radio and television broadcast facilities, mobile production vehicles, and recording studios where simultaneous visual monitoring of multiple audio channels is required. The combination of VU and PPM ballistics on a single display lets engineers track both program loudness and transient peaks without switching modes — particularly useful in live broadcast and multi-track recording where any channel could clip unexpectedly. The wide 70 dB dynamic range and tri-color LED bargraph make level issues immediately visible across the room. Wohler Technologies was well known in the broadcast industry for its analog and digital audio monitoring products during the 1990s and 2000s, and the LM106-6 remains useful in any facility that routes analog audio through a rack system and needs dependable, at-a-glance metering.