Bogen Nyquist Networked 4-Channel Power Amplifier (4 x 300W) - Manual (Page 3)

Installation
To install the Nyquist NQ-A4XXX Power Amplifiers:
1. Ensure the POWER switch is in the off position.
2. This product requires a connection to a Mains circuit with a
maximum of a 20A breaker.
3. Connect a Cat-5 type cable into the amplifier’s Ethernet port and
ensure the other end of the cable is correctly connected to your
network.
4. Set each of the two Amplifier Mode switches to the desired setting.
Each of the two internal amplifiers (A+B and C+D) can be configured
for single-channel bridged mode (aka bridged-tied load) operation
for 70V/25V/8Ω applications, or 2-channel operation for 25V/8Ω/4Ω
applications. The Amplifier Mode switch is used in conjunction with the
Bridged Signal routing setting in the system console.
Bridged Mode is typically used when higher power, single channel
operation with a high impedance loudspeaker load is desired. A
typical use-case would be for 70V or 25V loudspeaker runs, where
the total load is no less than 8Ω.
2-Channel Mode is typically used for 8Ω or 4Ω loudspeakers or 25V
loudspeaker runs. This mode allows the two amplifier channels to
run independently.
In Bridged Mode , Line Input 1 (or Line Input 3) is used as input. For
2-Channel Mode operation, Line Inputs 1 and 2 (or Line Inputs 3 and 4)
are used.
5. Connect the loudspeaker wires to the Amplifier Output Terminals
(labeled A +/−, B +/−, C +/−, and D +/−) as appropriate for the
desired mode of operation ( see Figures 1 and 2 ).
Bridged mode operation requires the speaker wires to be
NQ‑A4060‑G2, NQ‑A4120‑G2, NQ‑A4300‑G2
These networked Audio Power Amplifiers support a full range of
commercial paging, public address applications, and residential audio
applications, regardless of the venue size. The NQ-A4060, NQ-4120,
and the NQ-4300 can operate in 2-, 3-, or 4-channel mode, depending on
bridged mode configurations and application need.
Each networked audio power amplifier is a half-rack 2RU high enclosure
containing a Class D audio power amplifier, a universal switched-mode
power supply, an RJ45 network jack, a USB port, and pluggable Phoenix
style terminals for loudspeaker and Line-In connections. Optionally, Line-
In can be connected using the available RCA connectors.