Manual Logos
EELA AUDIO Parmentierweg 3
7
Rev. 6
(July 2001)
5657 EH Eindhoven, the Netherlands
Main v1.43
2.2 Rear side connectors
Mains supply
The mains inlet connector is a Neutrik PowerCon connector (NAC 3FCA, blue). This
connector provides a safe and reliable mains connection without the risk of accidentally
disconnection, as with standard IEC types. Mains inputs ranging from 90 VAC to 264 VAC
are accepted.
Inside the build in power supply there is a F2,5A/250V fuse. If this fuse needs to be replaced,
replace it only with Shurter SP0001.1008 or Littelfuse 21602.5
Microphone and insert input
Microphone input is available on a XLR Female connector. In the microphone menu 48 Volt
phantom powering can be switched On or Off to power condenser microphones.
Holding down the <Main> and <Talkback> buttons together (longpress function) gives
access the microphone set-up menu.
The insertion point has a ¼ inch jack connector. The level of the insertion point depends on
the pre-gain setting of the Microphone input. The Microphone signal is pre-amplified 40 dB or
60 dB.
Adjusting the pre-gain of the Microphone input therefore can cause the
insertion point level to raise 20 dB!! This will happen at approx. 50 dB pre-gain.
Input / output modules
A maximum of 6 stereo input / output, analogue or digital, modules can be plugged in.
The analogue modules can be used in combination with e.g. a telephone hybrid. A maximum
of 2 telephone hybrids can be connected, because the Logos provides 2 cleanfeeds,
required for a telephone connection. When a telephone hybrid is selected to be the input
source of a module, the output signal of that module will automatically change from Main to
Cleanfeed.
The digital modules have a build-in input Sample Rate Converter. The output sample rate is
48 kHz. All digital I/O is according to the AES/EBU standard. For SPDIF, an adapter cable for
short distances will work. For longer distances, an impedance-corrected adapter is preferred.
Remark:
The digital module is also needed when a digital output is required, as the basic Logos unit
does not provide a digital output. The input of this module can be used for a play-only device
like a CD player.
