Krell Industries 2250e Quick Setup Manual

AC POWER GUIDELINES Operate each amplifier from a dedicated AC power line rated at a minimum of 20 amps.
Note
Do not operate the Evolution e Series amplifiers with any device designed to alter or stabilize AC power.
Follow these steps to connect the amplifier to your system:
Connecting
the Amplifier 1. Turn all power sources and components off before connecting inputs and outputs.
2. Neatly organize the wiring between the amplifier and all system components. Separate AC wires
from audio cables to prevent hum or other unwanted noises from being introduced into the
Pin assignments for the XLR
system.
connectors:
3. Connect the balanced operation, connect the interconnect cable(s) from your preamplifier to the
Pin 1 Shield (ground)
balanced XLR input(s) (6) on the amplifier back panel. For single-ended operation, connect the
Pin 2 Non-inverting (0 ° ) (hot)
interconnect cable(s) from your preamplifier to the single-ended input(s) (5) on the amplifier back
Pin 3 Inverting (180 ) (cold)
°
panel.
Notes
Krell recommends using balanced connections for superior sonic performance. 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.
4. Connect the loudspeaker cables to the loudspeaker binding posts (3) on the amplifier back panel.
Loudspeaker binding posts for both stereo and monaural amplifiers only accept spade lugs.
5. Plug the AC power cord into the IEC power connector (9) on the back panel.
6. Plug the other end of the AC power cord into the wall socket.
Evolution e Series amplifiers are easy to operate:
Operating
1. Move the back panel power breaker switch (10) to the up position to place the amplifier in stand-
the Amplifier
by mode. The power status indicator (2) illuminates in green. Green is the standby color and
indicates an ultra low power draw of 2 watts.
2. Press the power button (1) on the amplifier front panel. The power status indicator (2) illuminates
Notes
in blue. The amplifier is in the operational mode.
When powering up any system,
Note
always turn amplifiers on last. When
The initial power-up phase lasts approximately 30 seconds from the moment the back panel power breaker
powering down, always turn
switch is placed in the up position. If the power button is pressed during this period, the power status indicator
amplifiers off first.
flashes blue for the remainder of the initial power-up phase. When the initial power-up phase is complete, the
To avoid loudspeaker damage, be
power indicator illuminates in blue and is no longer flashing.The amplifier is in the operational mode.
sure to switch all sources with the
preamplifier level either muted or
3. With the preamplifier muted or volume control completely lowered, select a source.
fully attenuated. Do not change
4. Increase the volume control to the desired listening level.
inputs to the amplifier while the
amplifier is on.
5. To turn the amplifier off, place it in the stand-by mode by pressing the power button on the front
Krell amplifiers have large reserves of
panel. The power status indicator turns green, and the amplifier is in the stand-by mode.
clean power and can safely drive
It is now safe to turn off the rest of the system.
loudspeakers to higher sound
pressure levels than other amplifiers. Powering off
However, use care when setting high
Leave the Evolution e Series amplifiers in the stand-by mode between listening sessions. Turn the
playback levels and lower the
amplifier off using the power breaker switch (10), and disconnect the amplifier from AC power when
volume level at any sign of
the system is not being used for an extended time period.
loudspeaker distress.
MODEL
4 Krell Evolution 2250e and 3250e Series Amplifiers Krell Industries, LLC, 45 Connair Road,Orange, CT 06477-3650 USA
TEL 203-298-4000, FAX 203-891-2028, E-MAIL krell@krellonline.com
WEB SITE www.krellonline.com
SERIAL NUMBER
KRELL
THE LEADER IN AUDIO ENGINEERING
The Evolution 2250e is a stereo amplifier. The Evolution 3250e is a three-channel amplifier.
Evolution e Series amplifiers can be configured to accommodate any sophisticated music or
home theater system. In addition to manual operation, the amplifiers can be operated remotely
OVERVIEW
by a 12 V trigger, or by using the remote control of other Krell components. Balanced and
single-ended inputs are on the back panel. A protection circuit shuts the amplifier down if short
Getting Started
circuit or over-temperature conditions are detected.
This guide outlines the basic steps for unpacking, placing, connecting, and operating an Evolution
e Series Power Amplifier. Please contact your authorized dealer, distributor, or Krell if you have
any questions not addressed in the owner's reference.
This CLASS I apparatus must be connected to a MAINS socket outlet with a protective earthing connection.
The Evolution e Series amplifier must be placed on a firm, level surface where it is not exposed to dripping or
splashing.
WARNINGS
The ventilation slots on the top of all Evolution e Series amplifiers and the ventilation slots on the back of the
Evolution 302e and 400e amplifiers must be unobstructed at all times during operation. Do not place flammable
material on top of or beneath the component.
Before making connections to the Evolution e Series amplifier, ensure that it is off and the preamplifier is in
This product complies with the
mute or stand-by mode. Make sure all cable terminations are of the highest quality and free from frayed
EMC directive (89/336/EEC), low-
ends, short circuits, or cold solder joints. Be especially careful when connecting to terminals marked
voltage directive (73/23/EEC), and
which may have hazardous voltages on them during operation.
Eco-Design directive for energy
using products (2009/125/EC). THERE ARE NO USER-SERVICEABLE PARTS INSIDE ANY KRELL PRODUCT.
This CLASS 1 apparatus must
be connected to a MAINS
Two people are needed to remove an Evolution e Series amplifier from its shipping box safely
socket outlet with a protective
and easily.
earthing connection.
1. Open the shipping box and remove the top layer of foam. You see these items:
1 Evolution e Series amplifier
1 20 amp AC power cord
Unpacking
1 12 VDC (12 V trigger) cable
2. Orient the shipping box so that one person stands at the front of the amplifier and one person
Note
stands at the back of the amplifier. Both people need to grab a pair of the cardboard handle
Save all packing materials. If you
cutouts (one pair located at the front of the amplifier and one pair located at the back of the
need to ship the Evolution e
amplifier) and simultaneously lift the amplifier straight up, out of the carton.
Series amplifier in the future,
repack the unit in its original 3. Place the amplifier in a safe location and remove the protective plastic wrapping.
packaging to prevent shipping
damage.
Place the amplifier on a firm, level surface, away from excessive heat, humidity, or moisture. If you
place the amplifier in a closed cabinet, you may need to modify shelf spacing or use small fans to
increase ventilation. When the front and back of a cabinet are open, the air space between the
chassis and shelf must be unobstructed.
Place the amplifier(s) as close to the loudspeakers as possible. While balanced connections
Placement
technology permit long cable lengths, keep loudspeaker cable lengths to a minimum.
2250e,
EVOLUTION e SERIES POWER
AMPLIFIERS
3250e
Quick Setup Guide
1 packet containing this quick setup
guide and the warranty registration card
Krell Evolution 2250e and 3250e Series Amplifiers 1