Lab.gruppen PLM series Operation Manual

Also see for PLM 10000Q: Supplementary guide User manual addendum Specifications Quick start Technical data

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Lab.gruppen PLM series Operation Manual Manual pdf 89 page image

Application Guide83PLM Series Operation Manual rev 1.1.910.3.6 Amp GainThe Amp Gain corresponds to the gain adjustment in a conventional separate loudspeaker processor andamplifier system. When using a pre-defined Module loudspeaker preset file, the Amp Gain settings willnormally remain as defined in the file. The limiter and output gain settings of the Module were configuredwith this gain setting and will not be automatically compensated if changes are made. This configurationscheme, though unusual, allows for compatibility with legacy Dolby / Lake products.When creating a loudspeaker preset Module file, adjust by navigating to I/O CONFIG >EVENTS & CONTROL > CONTROL in the Lake Controller. Please refer to the Lake Controller OperationManual for further details.10.4 Gain / Level Optimization10.4.1 Maximize Volume CapabilityTo maximize the volume capability of the device, ensure there is sufficient headroom in the signal path toavoid clipping before the limiters engage. It must be possible to achieve enough gain through the device toengage the limiters and realize a high average SPL. As an optimal setting, allow for a headroom of 10 dB ormore for all channels; the simplest way to accomplish this is to increase the Module input gain.10.4.2 Minimize NoiseTo help provide the best volume to noise ratio, use an AES or Dante digital input signal wherever possible. Ifusing analog inputs, ensure that unused or unnecessarily high headroom is not introduced at the input to thedevice. If full or high average power is not required, the Module input gain may be reduced.10.4.3 Gain Optimization ExamplesThis section provides examples on performance effects resulting from changes to the PLM gain structure.10.4.3.1 Digital Input Gain Structure ExamplesFigure 10-2 illustrates the recommended configuration of the PLM when using an AES or Dante digital input.▸ Input Clip: 0 dBFS▸ Amp Gain: 35 dB▸ SNR: 114.2 dB▸ Absolute Noise Floor: -71.3 dBu