KLR-Series Amplifiers
KLR 2000, KLR 3200, KLR 4000, KLR 5000
Operator Manual
Ashly Audio Inc.
847 Holt Road, Webster, NY 14580-9103
Toll Free (800) 828-6308, Telephone (585) 872-0010, FAX (585) 872-0739
All Trademarks referred to herein, are the property of their respective owners.
All Rights Reserved
Rev 0.72110
Operator Manual – KLR Series Amplifiers
Page - 3
Important Safety
Instructions - 2
Introduction
Introduction - 3
About Ashly
FCC Compliance
Congratulations on your purchase of an Ashly KLR-Series amplifier. The KLR-Series is
made up of powerful, high-efficiency, lightweight amplifiers incorporating the latest
technologies. We are confident that you will be pleased with the high performance, superb
sound quality, reliability, and more.
The KLR Series - 4
Physical Description - 5
Installation - 6
About Ashly
Troubleshooting - 10
Spec Table - 11
Ashly Audio was founded in 1974 by a group of recording engineers, concert sound
professionals, and electronics designers. The first products were elaborate custom consoles
for friends and associates, but business quickly spread to new clients and the business
grew. The philosophy we established from the very beginning holds true today: to offer
only the highest quality audio tools at an affordable cost to the professional user – ensuring
reliability and long life. More than thirty years later, Ashly remains committed to these
principles.
Warranty - 12
FCC Compliance
This device complies with part 15 of the FCC Rules. Operation is subject to the following
two conditions:
1. This device may not cause harmful interference
2. This device must accept any interference received, including interference that may
cause undesired operation.
All Rights Reserved
Rev 0.72110
Page - 4
Operator Manual – KLR Series Amplifiers
Important Safety
Instructions – 2
The KLR Series
Introduction - 3
KLR-Series amplifiers are high-efficiency, lightweight high power amplifiers incorporating
the latest amplifier technologies.
The KLR Series - 4
Protection
Physical Description - 5
Installation - 6
The series provides a power range of 1000 to 2500 watts per channel at 2 ohms (20Hz-
20kHz, 1% THD). The KLR series is available in 2 channel versions at four power points.
All models will drive 2, 4, or 8 ohm loads.
Troubleshooting - 10
Spec Table - 11
KLR-Series Power Ratings (per channel)
Warranty - 12
Stereo
4Ω
Mono Bridged
4Ω
Model
8Ω
2Ω
KLR 2000
KLR 3200
KLR 4000
KLR 5000
350W
650W
850W
1000W
600W
1100W
1400W
1700W
1000W
1600W
2000W
2500W
2000W
3200W
4000W
5000W
•
•
•
•
•
•
•
•
•
Inputs are via 3-pin Euroblock, XLR, and ¼” TRS connectors.
Switch mode power supply provides high efficiency and low weight
Output connectors are Neutrik Speakon.
Rear panel switches include: Gain and Operation Mode, Limiter, and HPF.
Forced air cooled (front panel intake, rear panel exhaust)
Front panel indicators for output level, clip/protect, and power on/off
Gain selectable switch for both channels
Removable dust filters on front panel
Rack ears for permanent installation in a standard 2RU 19”(rack mount
width) enclosure
Protection
KLR-Series Amplifiers come standard with several protection circuits:
ꢀ Output over-current protection
ꢀ DC output protection
ꢀ Chassis internal temperature monitoring
ꢀ Inrush limiting
ꢀ Mains circuit breaker
Copyright© 2010 – Ashly Audio Inc.
Operator Manual – KLR Series Amplifiers
Page - 5
Important Safety
Instructions – 2
Physical Description
Introduction - 3
Each model in the KLR-Series is 2RU. The model number is indicated on the left side of the
front panel
The KLR Series - 4
Physical Description - 5
Front Panel
Rear Panel
Amplifier Front Panel
Installation - 6
Troubleshooting - 10
Spec Table - 11
Warranty - 12
1. Mounting Holes – For rack mounting.
2. Air Inflow Vents – Cool air enters here.
3. Channel Attenuators – These knobs adjust
the attenuation of the input signal of each
channel from ∞ to 0.
5. Power Switch and LED – Switches the unit on
or off.
4. Signal, Clip, and Protect LEDs – Indicates
output level of –30, -20, 0dB, Clip, and amplifier
protect.
Amplifier Rear Panel
1. AC Cord – For connection to the AC mains
2. CH 2 Output Connector – This connector
provides the amplifier’s Channel 2 output.
3. CH 1, CH 2, Bridged Output Connector –
This connector provides the amplifier’s Channel
1, channel 1 and 2, or bridged output.
4. Air Outflow Vents – Warm air exits here.
5. Gain Switch – The Gain switch sets both
channel’s gain to 1V, 32dB, or 26dB sensitivity.
6. Mode Switch – This switch selects the
amplifier’s operating mode (Bridge, Stereo, or
Parallel Mono).
7. 3-Pin Euroblock Input Connectors – These
connectors are used for balanced or
unbalanced input signals.
8. Combination XLR, 1/4” TRS Input
Connectors – These connectors are used for
balanced or unbalanced input signals.
9. Limiter Switch – This switch engages the
limiter. There is a separate limiter for each
channel.
10. HPF Switch – This switch selects the input
HiPass filter to 30Hz, 50Hz, or Off.
WARNING: Do not remove the mains connector ground.
All Rights Reserved
Rev 0.72110
Page - 6
Operator Manual – KLR Series Amplifiers
Important Safety
Instructions – 2
Installation
Introduction - 3
KLR-Series amplifiers are designed for use in both fixed and mobile sound systems. Each
amplifier is shipped (unless otherwise specified) with the following factory settings:
The KLR Series - 4
Physical Description - 5
Front Panel
Rear Panel
Front panel:
Rear panel:
On/Off Switch = Off
Attenuators = ∞
High Pass Filter(s) = Off
Gain Selector = +26 dB
Mode Selector = Stereo
Limiter Switch = Off
Installation – 6
Requirements
Installation Density
Typical Applications
Connectors & Polarity
Speaker Connections
Before connecting to mains power, make sure that the switches are set to the configuration
needed for your particular application. Always switch the amplifier off before making any
changes to the settings. Failure to do so could result in damage to the unit or other components
in your system. CAUTION: When mounting or connecting the amplifier, always disconnect it
from the mains. Use four screws and washers when mounting the amplifier to the front rack
rails. Rear support is also recommended, especially for mobile or touring use. To reduce the
risk of fire or electric shock, do not expose this apparatus to rain or moisture.
Troubleshooting - 10
Spec Table - 11
Warranty - 12
Requirements
KLR-Series amplifiers have specific physical, electrical and signal requirements for proper
operation. These requirements will vary depending on your specific application, setup, and
the settings on the amplifier. When setting up and testing your system, please take special
care to double check all connections and settings. Please refer to the specifications section
of this manual for specific input, output and other figures.
Installation Density
KLR-Series amplifiers produce substantial power output from a small chassis. When
driven at the higher-end of their potential, they do produce heat that must be dissipated. In
cases where multiple KLR amplifiers are mounted together (or a single KLR with other
equipment), it is recommended that a 1RU space is left between units to allow for proper
air circulation. If the amplifier overheats, it will go into ‘thermal’ protect mode to prevent
damage to itself and any connected components and speakers.
Copyright© 2010 – Ashly Audio Inc.
Operator Manual – KLR Series Amplifiers
Page - 7
Important Safety
Instructions – 2
Typical Applications
Introduction - 3
The KLR Series - 4
Physical Description - 5
Installation – 6
Requirements
Installation Density
Typical Applications
Connectors & Polarity
Speaker Connections
Troubleshooting - 10
Spec Table - 11
Warranty - 12
The most common use of a KLR-Series amplifier is a 2-channel source driving 2 speaker
channels. In this illustration, the amplifier is receiving a stereo signal and is driving two
stereo speakers. The amplifier is in STEREO mode.
Another use of a KLR-Series amplifier is a single channel source driving both speaker
channels. In this illustration, the amplifier is receiving a signal and is driving both channel
speakers with the same signal. The amplifier is in PARALLEL mode.
KLR-Series amplifiers are well suited to BRIDGED operation to drive a speaker load such
as a subwoofer. This illustration shows a KLR driving a signal in BRIDGED mode. Note
the special wiring to the channel 1 connector for Bridge mode. Minimum Bridged load
impedance is 4Ω (2Ω per channel).
All Rights Reserved
Rev 0.72110
Page - 8
Operator Manual – KLR Series Amplifiers
Important Safety
Instructions – 2
Connectors & Polarity
KLR-Series amplifiers utilize three types of professional audio connectors. For the inputs,
3-pin Euroblock connectors are utilized with their polarity clearly marked on the
amplifier’s rear panel, and combination XLR and 1/4” phone jack are all wired in parallel.
Outputs are via Speakon connectors. The polarity for these connections is marked on the
unit’s chassis. Note that polarity changes when the unit is operated in BRIDGED mode.
Be sure to read the Operation section of this manual for important information on the
operating modes.
Introduction - 3
The KLR Series - 4
Physical Description - 5
Installation – 6
Requirements
Installation Density
Typical Applications
Connectors & Polarity
Speaker Connections
Troubleshooting - 10
Spec Table - 11
Warranty - 12
Copyright© 2010 – Ashly Audio Inc.
Operator Manual – KLR Series Amplifiers
Page - 9
Important Safety
Instructions – 2
Speaker Connections
Introduction - 3
The KLR Series - 4
Physical Description - 5
Installation – 6
Requirements
Installation Density
Typical Applications
Connectors & Polarity
Speaker Connections
Troubleshooting - 10
Spec Table - 11
Stereo Speaker Wiring
Warranty - 12
In this mode, the amplifier’s channels operate fully independent of each other. Each signal
enters the unit and is amplified separately and wired using different connectors.
Stereo Speaker Wiring Using Single 4-Conductor Speaker Cable
In this mode, the amplifier’s channels still operate independent of each other. Each signal is
amplified separately, however both channels are wired using the Channel 1 connector.
Bridged (Mono) Mode
In this mode, a single input is connected to channel 1 and is connected to the two output
channels that have been “Bridged” together using the Channel 1 connector. Minimum
Bridged load impedance is 4Ω.
All Rights Reserved
Rev 0.72110
Page - 10
Operator Manual – KLR Series Amplifiers
Important Safety
Instructions – 2
Troubleshooting
Introduction - 3
The KLR Sries - 4
Physical Description - 5
Installation – 6
Situation
No Sound
Indication
Signal LED not lit
Clip LEDs not lit
Action
Check AC plug. Confirm that AC outlet works
by plugging in another device.
Signal LED not lit
Make sure the signal source is operating and
try another cable. Check position of Volume
Pots.
Check the speaker wiring for breaks.
Try another speaker and cable.
Troubleshooting - 10
Spec Table - 11
Warranty - 12
Signal LEDs responding to signal level
Protect LED is lit
Overheating will cause protective muting.
Check for proper ventilation.
No Channel
Separation
No Channel Separation
Check the mode indicators on the back panel
and make sure the mode selector on the rear
panel is in the stereo position. Make sure
other equipment in the signal path such as
mixers and preamps are set for stereo, not
mono
Distorted Sound
Power LED is lit
A faulty speaker or a loose connection could
cause this. Check the wiring and try another
speaker.
Signal LEDs responding to signal level
The signal source might be clipping. Keep the
volume pots at least halfway up so that the
source does not have to be overdriven.
Keep the volume pots at least halfway up and
try changing input sensitivity with the gain
selector on the rear.
Unplug the amplifier input to confirm that the
hiss is coming from the source or from a device
upstream. Erratic or popping noises indicate an
electronic fault in the offending unit. To keep
the noise floor low, operate the primary signal
source at full level, without clipping. Avoid
boosting the signal further between the source
and the amplifier.
Clip LEDs not lit
Hiss
Hiss
Squeals and
Feedback
Squeals and Feedback
Microphone feedback should be eliminated
with mixer controls. If noise continues to build
up with no microphone gain, there is a serious
fault in the signal processors or cables.
Working in succession from the signal source
towards the amplifier and check each device in
the signal path by reducing its gain or by
unplugging it.
Copyright© 2010 – Ashly Audio Inc.
Operator Manual – KLR Series Amplifiers
Page - 11
Important Safety
Instructions – 2
Spec Table
Introduction - 3
KLR 2000
KLR 3200
KLR 4000
KLR 5000
The KLR Series - 4
Physical Description - 5
Installation – 6
Power Output Per Channel
Stereo Mode, both channels driven
8Ω, 20 Hz - 20 kHz, 1% THD
4Ω, 20 Hz - 20 kHz, 1% THD
2Ω, 20 Hz - 20 kHz, 1% THD
Bridged Mono Mode
4Ω, 20 Hz - 20 kHz, 1% THD
Line Current Draw (all channels driven @4Ω)
Idle (120VAC 60Hz)
1/8th Power Pink Noise (120VAC 60Hz)
1/3 Power Sine Wave (120VAC 60Hz)
Thermal Dissipation (all channels driven @4Ω)
Idle (BTU/hr)
350W
600W
650W
1100W
1600W
850W
1400W
2000W
1000W
1700W
2500W
1000W
Troubleshooting - 10
Spec Table – 11
Warranty - 12
2000W
3200W
4000W
5000W
0.99A
9.7A
0.92A
11.4A
16.6A
1.05A
14.0A
19.8A
1.14A
17.5A
24.7A
14.9A
164
1876
2880
31dB
136
2063
3001
33dB
171
2489
3516
36dB
215
3111
4395
37dB
1/8th Power Pink Noise (BTU/hr)
1/3 Power Sine Wave (BTU/hr)
Voltage Gain (rated output power @4Ω)
Signal to Noise Ratio
(20Hz-20kHz, rated power @ 8Ω unweighted)
>108 dB
Class AB
>109 dB
Class AB
>109 dB
>110 dB
Output Circuitry:
2 Step Class H
2 Step Class H
Frequency Response 1W @ 8Ω
20Hz-20kHz
+/- 0.3dB
(-3dB down point)
5Hz – 70kHz
Damping Factor – 100Hz @ rated power @8Ω
THD 20Hz-20kHz, 10dB below rated output @4Ω
Input Impedance
HPF (30Hz, 50Hz, Off)
Amplifier Protection
> 380
<0.05%
12 kΩ, balanced
12dB/Oct
Output Overcurent, DC Output, Chassis Temperature, Mains Breaker
Cooling
Front Panel Indicators
Attenuators
Variable Speed Fan, Front to Rear Air Flow
Prot/Clip, Signal, Power
Per channel: front panel
Input Connectors, each channel
3- Pin Euroblock, XLR, ¼” TRS Phone Jack
Output connectors, each channel
Operating Temperature/Humidity
Speakon
Temperature: -10C - +40C / Humidity: 0% - 90%
Power Cable Connector
Dimensions
3-Prong NEMA 5-15
19” x 3.5” x 16” (482mm x 88mmx x407mm)
Weight
24 lbs (10.9kg)
26.4 lbs (12kg)
26.7 lbs (12.1kg) 27.4 lbs (12.4kg)
All Specifications Subject to Change or Improvement Without Notice.
All Rights Reserved
Rev 0.72110
Page - 12
Operator Manual – KLR Series Amplifiers
Ashly Audio Inc. LIMITED WARRANTY (USA ONLY)
Important Safety
Instructions – 2
(Other countries please contact your respective distributor or dealer.)
Introduction - 3
The KLR Series - 4
Physical Description - 5
Installation – 6
For units purchased in the USA, warranty service for this unit shall be provided by ASHLY AUDIO,
INC. in accordance with the following warranty statement.
ASHLY AUDIO, INC. warrants to the owner of this product that it will be free from defects in
workmanship and materials for a period of FIVE years from the original-date-of-purchase. ASHLY
AUDIO INC. will without charge, repair or replace at its discretion, any defective product or component
parts upon prepaid delivery of the product to the ASHLY AUDIO, INC. factory service department,
accompanied with a proof of original-date-of-purchase in the form of a valid sales receipt. This warranty
gives you specific legal rights, and you may also have other rights, which vary from state to state.
Troubleshooting - 10
Spec Table - 11
Warranty - 12
EXCLUSIONS: This warranty does not apply in the event of misuse, neglect, or as a result of
unauthorized alterations or repairs made to the product. This warranty is void if the serial number is
altered, defaced, or removed. ASHLY AUDIO, INC. reserves the right to make changes in design, or
make additions to, or improvements upon, this product without any obligation to install the same on
products previously manufactured.
Any implied warranties, which may arise under the operation of state law, shall be effective only for
FIVE years from the original-date-of-purchase of the product. ASHLY AUDIO, INC. shall be obligated
to only correct defects in the product itself. ASHLY AUDIO, INC. is not liable for any damage or
injury, which may result from, or be incidental to, or a consequence of, such defects. Some states do not
allow limitations on how long an implied warranty lasts, or the exclusion, or limitation of incidental or
consequential damages, so the above limitations or exclusions may not apply to you.
OBTAINING WARRANTY SERVICE:
For warranty service in the United States, please follow this procedure:
1) Return the product to ASHLY AUDIO, INC. freight prepaid, with a written statement describing the
defect and application that the product is used in. ASHLY AUDIO, INC. will examine the product and
perform any necessary service, including replacement of defective parts, at no further cost to you.
2) Ship your product to:
ASHLY AUDIO, INC.
Attention: Service Department
847 Holt Road
Webster, NY 14580-9103
Copyright© 2010 – Ashly Audio Inc.
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