Genelec DSP 8260A Operating Manual page 3

Figure 1. Connectors and controls on the back panel of a 8260A. 8240A and 8250A share the same layout but without the
12 V trigger voltage connector.
feature high SPL output, low colouration and broad bandwidth
in a small enclosure size. They are suitable for a wide variety
of tasks, such as near field monitoring, mobile vans, broadcast
and TV control rooms, surround sound systems and home stu-
dios. The Minimum Diffraction Enclosure™ (MDE™), advanced
Directivity Control Waveguide™ (DCW™) and Minimum Diffrac-
tion Coaxial (MDC™) technologies provide excellent frequency
balance even in difficult acoustic environments.
Amplifiers
The amplifier unit is mounted in the rear of the loudspeaker en-
closure. The unit incorporates special circuitry for driver thermal
overload protection. Variable input sensitivity allows accurate
level matching to console output section.
Using the Loudspeakers in Stand-Alone
Mode
The 8240A, 8250A and 8260A accept both analogue line level
input signals and AES/EBU formatted digital input signals.
When the loudspeakers are not connected to Genelec loud-
speaker control network, they operate in the stand-alone mode.
However, settings made with the Genelec Loudspeaker Manager
software can be saved into each loudspeaker and applied even
when the network is disconnected by setting switch 1 "STORED/
MANUAL CONTROL" on switch group 2 of each loudspeaker to
position "STORED."
This manual concentrates on using the loudspeakers without the
control network. All issues concerning use with the network are
explained in detail in the System Operating Manual provided with
the GLM™ Loudspeaker Manager software kit.
Connections
Each loudspeaker is supplied with a mains cable, one 5 m GLM
network cable and an operating manual. Before connecting up,
ensure that the mains switch is off.
"MAINS INPUT" Connector
Connect the mains supply to this connector.
"DIGITAL IN AES/EBU" Connector
Use this female XLR connector for AES/EBU formatted digital
audio input signals. This input is selected automatically when a
valid digital audio signal is present, and overrides the analogue
input.
Depending on the digital hardware, transmission of a 192 kHz
sample rate is achieved using a double speed, single channel/
cable interface. This is called dual-wire mode. In this case one
cable per channel is used and no channel selection is required.
Dual-wire mode is automatically detected by the input stage.
If the digital source device has a digital level monitor pot or
graphical volume fader that controls the digital level, it may be
advantageous to lower the level control either on the computer
interface or the loudspeaker's back panel controls, which in turn
will force the use of more of the digital [bit] resolution in the vol-
ume control.
If the digital inputs are used, all audio outputs are referenced
to 0 dBFS (digital Full Scale, the largest level that may be rep-
resented in the AES/EBU signal). Genelec DSP loudspeakers
produce 100 dB SPL at 1 meter in free space for a digital input
signal of –30 dB FS. It is advantageous to keep the digital level
as high as possible.
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