Leema-acoustics Hydra Handbook - Hydra

Connections

HYDRA

Connections

Input connection

WARNING: The AV DIRECT input must not be used with sources that are not equipped with an independent volume control e.g. 

most CD players and DVD players. This input is designed to be used only with an external surround sound processor that has an 

independent volume control, or when the Hydra is used as a fixed level power amplifier, e.g. in a pre-power or bi-amp 

configuration. The Hydra has an internal link which must be correctly set either by the factory or by your dealer, to configure the 

unit for fixed level or for normal operation.

AV DIRECT>  The Hydra’s AV DIRECT input is provided for those using a dedicated external multi-channel decoder or processor 

equipped with a volume control. Sources with fixed output levels such as CD or DVD players MUST NOT be connected here.

When AV is selected, the volume level defaults to a low setting and then slowly rises to a preset unity gain point. The volume of 

the Corvus and the Hydra will track the system’s volume. Great care should be taken when using the AV direct input since an 

excessive volume level could easily result. However, unlike other systems, the volume control on the Leema system is still active 

and can be adjusted away from the pre-set point as a safety feature. Selecting another input on the Tucana then re-selecting 

the AV input will reset the unity gain point. In a surround system, the Tucana’s AV inputs should be connected to the surround 

processor’s left and right analogue outputs. The processor’s left and right surround outputs should then be connected to the 

Hydra’s left and right AV inputs.  The remaining centre and subwoofer outputs from the processor should connect to their 

respective inputs on the Corvus. For a more detailed explanation of how to connect the system in AV mode please see the 

Corvus manual.

The AV DIRECT input becomes the power amp input when the Hyrda is optionally configured for fixed level operation.

Great care should be taken when using the AV DIRECT inputs since an excessive volume level could easily result.  

For a more detailed description of bi-amplifying please see the next page.

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