Wiring Inputs in Parallel
Wiring XLR and 1/4” inputs in parallel (as throughputs to other equipment)
requires special consideration when combining balanced and unbalanced
lines.
Connecting an unbalanced lines described above to any input will
render all inputs on that channel unbalanced.
If it is necessary to
combine balanced and unbalanced connections on the same channel, the
unbalanced connector must not ground the Negative (-) input. In the case of
the 1/4” phone input, this means using the TRS (“stereo”) 1/4” phone plug
and leaving the sleeve terminal unconnected. When using the XLR
connector(s), pin 3 must be left unconnected (not tied to ground as
described above).
Output Wiring
Outputs are available via both 5-Way Binding Posts and heavy duty 1/4”
Phone Jacks. The Binding Posts will accept bare wire of up to 6 AWG,
spade lugs, hook lugs, and a single or dual banana plugs. When wiring
speakers in stereo, red binding post is connected to the speaker’s positive
terminal; black is ground.
The 1/4” phone jacks are wired using the following assignments.
Tip = Positive
Sleeve = Ground
Each channel’s 1/4” Phone and Binding Post output connectors are wired in
parallel.
14
Balanced/Unbalanced Inputs
The World 600/World 1.2 incorporates XLR and 1/4” Phone input
Connectors, wired in parallel. This allows throughput of the signal to
additional amplifiers or other equipment such as DAT recorders, etc.
6-Gauge, 5-Way Binding Post and 1/4” Outputs
The World 600/World 1.2 binding Posts output connectors will accept
banana plugs, spade lugs, or bare wire up to 6AWG. In addition, the
Binding Posts are positioned to allow one standard banana plug to be used
when operating the amplifier in bridged mode. 1/4” Phone output
connectors are also provided, wired in parallel with the Binding Posts.
In-Rush Current Limiting
A breakthrough from Stewart, the World 600/World 1.2 unique inrush
current limiting circuitry minimizes power drawn from the wall to 8 AMPS
or less on plug-in. Staggered turn-on configurations for multiple-amplifier
setups are now a thing of the past, as multiple amplifiers may be switch on
simultaneously.
High-Frequency Switch Mode Power Supply
The World 600/World 1.2 features a radical departure from conventional
power supply design: Stewart’s High-Frequency Switch Mode Power
Supply . Because of this pioneering use of advanced technology, some
explanation is in order.
Conventional supplies operating at 60Hz (standard line frequency)
recharge only 120 times per second, requiring their storage capacitors and
transformer to be quite large to supply the energy needed during the
intervals between cycles when power is not available from the wall. The
power supply must act as a local reservoir of power from which the
amplifier circuits draw. This storage function is responsible for much of the
bulk, weight and cost of traditional power amplifiers.
The Stewart High-Frequency Switch Mode Power Supply fully recharges
120,000 times per second (1000 times faster than conventional supplies),
requiring far less capacitance for filtering and storage. This high-speed
recharging reduces power supply “sagging” common with other designs. In
a Stewart amplifier, it is almost as though power is fed directly from
7
