Connections; 1.Signal Grounding; 2.Analog Audio Input Connections; 2.1. Aux Sel. In: Analog Input Selection - Powersoft audio Ottocanali Série Guide Rapide

Connections

Make sure the power switch is off before attempting to
make any input or output connections.
By using good quality input and speaker cables, the like-
lihood of erratic signal behavior is reduced to a minimum.
Whether you make them or buy them, look for good quality
wires, connectors and soldering techniques.

4 : 1.Signal grounding

There is no ground switch or terminal on the Ottocanali
Series amplifiers. All shield terminals of input connections
are directly connected to the chassis. This means that the
unit's signal grounding system is automatic. In order to limit
hum and/or interference entering the signal path, use bal-
anced input connections.
In the interests of safety, the unit MUST always operate
with electrical safety earth connected to the chassis via the
dedicated Protective Earth

4 : 2.Analog audio input connections

Ottocanali Series amplifiers implements two analog
input connections per channel: LINE and AUX input. Input
selection is made via software or through the AUX SEL. IN
switch (see §4 : 2.1. AUX SEL. IN: Analog input
Analog input is provided by means of four Phoenix MC
1,5/12-ST-3,81 1803675 connectors (see
and Panel F, p. 10), two for LINE input (channels 1-to-4
and 5-to-8) and two dedicated to the AUX input (channels
1-to-4 and 5-to-8). Signal polarity of analog input connec-
tions is shown in Panel G, p.

4 : 2.1. AUX SEL. IN: Analog input selection

Ottocanali Series amplifiers can switch from analog
LINE inputs to AUX inputs when a constant voltage in the
12 V to 30 V range is applied to the AUX SEL. IN connec-
DC DC
tor (see Panel D, p. 8 and
voltage is removed from the AUX SEL. IN, the unit switches
back from AUX inputs to LINE inputs.
FIG. 2: AUX SEL. IN and PWS OUT connector and wirings.

4 : 2.2. PWS OUT: Built-in auxiliary power supply

The PWS OUT connector provides a 24V
with respect to ground (0.2 A max) – when enabled by the
toggle switch on the front panel (see
8 and Panel E, Panel F, p. 10).
20 | Ottocanali Series
wire.
selection).
Panel D, p. 8
12.
Panel F, p. 10). When this
– symmetrical
DC
Panel C, Panel D, p.
By wiring the PWS OUT connector to the AUX SEL. IN as
shown in FIG. 3, the front panel PWS OUT switch is enabled
to toggle between analog LINE inputs and AUX inputs: this
provides an additional manual procedure to switch from
analog LINE to AUX and vice versa.
OFF
ON
ENERGY
SAVE
PWS OUT
1 2 3
PWS OUT switch
OFF ON
FIG. 3: Manual procedure to switch from LINE to AUX.

4 : 3.Digital audio input connections

Digital input is supported via Dante™ standard proto-
cols in Dante equipped devices.
In Ottocanali DSP+D amplifiers, Dante connectivity is
supported via two Ethernet ports located on the rightmost
side of the rear panels (see
(IEEE 802.3u, 100 Mbit/s) and Gigabit Ethernet (IEEE
802.3ab, 1 Gbit/s) network protocols are supported; Cat5e
or Cat6 standard UTP twisted pair cables shall be used for
connections up to 100 meters (328 ft).
Ethernet cabling must comply to TIA/EIA-568-B and adopt
the T568B scheme pinout, as shown in

4 : 3.1. Input selection and Backup policy

In Ottocanali DSP+D amplifiers it is possible to select
among three input signal sources per channel: analog (either
LINE or AUX) and two Dante streams (streams 1-to-8 and
9-to-16).
FIG. 4: Ottocanali DSP+D: Input
selection and backup policy.
4
LINE AUX
4 5 PWS OUT 6 7 8
input input
OFF ACTIVE —
ON — ACTIVE
Panel F, p. 10). Fast Ethernet
Panel L, p. 14.