PIN 1: SHIELD
PIN 2: a, +
PIN 3: b, -
Inputs INPUT CHANNEL A&B
With an input sensitivity of 775 mV = 0 dBu and an input impedance of 20 k ohms, the electronically balanced inputs – INPUT CHANNEL A&B – are meant for the connection of control amplifiers, audio controllers, mixing consoles, etc.
Peripheral pieces of audio equipment are either connected via the XLR- type input connectors or using the
The
In case the controlling device does not supply balanced output connectors, it is also possible to configure the connectors for unbalanced operation. Therefore, the common ground (pin 1) has to be connected to the
So, to be able to entirely make use of all the advantages the electronically balanced input stage offers – like the suppression of humming and interference noise – it is beneficial to
In case floating inputs are needed, the inputs are ready to be retrofitted with input transformers; one optional available extension kit NRS 90208 (308840) per channel is necessary.
Instructions On How To Install NRS 90208 Extension Kits
∙unplug the power amplifier from the mains
∙detach all screws holding the cover plate of the appliance
∙lift and remove the cover plate
∙disconnect the
∙detach all screws holding the printed board assembly 81340/1
∙remove the printed board assembly 81340/1 and unsolder the resistors R106 … R109
∙attach insulators to the input transformers according to the corespondent marks on the printed board assembly
∙
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