Balanced Connections - Krell Industries Evolution e series Owner's Reference Manual

FOUR
SECTION
Connecting an Evolution e Series Amplifier
to Your System
This section describes Evolution e Series amplifier connections. Each Evolution e Series
302e, 402e, 403e, 400e, 600e, and 900e amplifier channel has a CAST 4-pin connector, a
balanced input via an XLR connector, a single-ended RCA connector, and a pair of
loudspeaker binding posts. The rear panel also has 12 VDC trigger input and outputs, and
a backlight remote trigger input. The Evolution e Series 2250e, and 3250e amplifier
channel has a balanced input via an XLR connector, a single-ended RCA connector, and a
pair of loudspeaker binding posts. The rear panel also has 12 VDC trigger input and
output. All inputs and outputs are located on the Evolution e Series amplifier back panel.
Maintain the correct left/right orientation, when hooking up your system.
CAST Connections
Krell recommends using its proprietary Krell CAST system for unparalleled sonic
performance for connections between the Evolution e Series amplifier and other CAST-
equipped components. Krell CAST uses flexible interconnecting cables that can be drawn
through tight spaces and concealed.

Balanced Connections

The Evolution e Series amplifier also offers balanced operation. The circuitry and
connections associated with balanced operation not only can minimize sonic loss but also
are immune to induced noise, especially for installations using long cables.
XLR Pin Configuration
Pin 1
Pin 2
Pin 3
Single-ended Connections
Each Evolution e Series amplifier channel has one single-ended input. If connecting a vacuum
tube preamplifier, use the single-ended inputs only (see below). Connect the u-shaped jumpers
between pins 1 and 3 of the XLR connectors when using single-ended inputs. On the 2250e
and 3250e use the Input Select Switch to select single-ended. No jumpers are necessary.
Ground
Non-inverting (0 ) (hot)
O
Inverting (180 ) (cold)
O
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