ModWright Instruments KWI 200 Owner's Manual
ModWright Instruments Inc.
KWI 200 Integrated Power Amplifier
Owner’s Manual
Manufactured by ModWright Instruments, Inc.
21919 399th St., Amboy, WA 98601
USA
www.modwright.com
ModWright Instruments, Inc.
21919 399th St., Amboy, WA 98601
Proudly Handcrafted in the USA
www.modwright.com
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PLEASE READ FIRST (SAFETY):
Water and moisture: Electrical devices should not be used near water, such as near a bathtub,
sink, laundry tub, wet basement or swimming pool. Care should be taken such that objects do not
have the opportunity to fall, and that liquid is never spilled onto or into the device enclosure
through openings.
Power Sources: This electrical device must be connected to a mains power source in strict
accordance with the supplied product owner’s manual. Please verify that the AC mains voltage
specified in the product manual match those requirements indicated on the unit and the AC
voltage provided to your location by the power company. Unplug this apparatus during
lightening storms or when unused for long periods of time. To completely disconnect this
apparatus from mains power, disconnect the power cord from the AC receptacle. The equipment
power switch does not provide adequate protection to be considered a service disconnect.
Grounding: Adequate precautions should be taken so that the grounding provisions built into an
electrical product are never defeated. Product should ONLY be plugged into a properly
grounded wall outlet.
Ventilation: Power-amplifiers run warm, but you should be able to place your hands on them
without discomfort. You must allow adequate ventilation in installation, by providing for free air
circulation around the product. Electronics should not be subjected to sources of excessive
radiant heat. Excessive heat can shorten the life of the product and may cause the electronics to
self protect and shut down. Never block any ventilation openings. Allow at least 2 inches of
clearance around these products for proper ventilation.
Servicing: To reduce the risk of fire, electrical shock or other injuries, the user should not
attempt to service the device beyond that which is described in the operating instructions. All
other servicing must be referred to qualified service personnel. There are no user serviceable
parts inside.
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Protection Circuitry:
Protection Circuitry:
This amplifier has multiple levels of circuit protection, designed to prevent damage to
amplifiers, speakers and connected equipment.
o DC input protection provided by transformer input coupling.
o Thermal overload protection provided by internal thermal sensors. Upon
thermal overload, amp will simply shut down. The message “00” “P5” (“OOPS”)
will be visible on displays and will go out after 8 seconds. If this happens, let amp
cool and then turn back on.
o DC Output Protection provided by our unique and proprietary TSPTM “Total
Silent Protection” circuitry, residing entirely outside the signal path. When
protection is triggered, the amp shuts down and the message “00” “P5” (“OOPS”)
will be visible on displays. Message will remain for approximately 8 seconds. If
amp continues to encounter this fault condition, and will not turn on, contact
dealer or ModWright service agent.
Fuses:
o All fuses are internal and are only to be replaced at the factory or by factory
authorized technician. There are no user serviceable parts inside and opening
the unit will void the factory warranty. If unit protection triggers and amp will not
re-start, please contact factory or ModWright service agent.
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Setup and General Operation:
Setup:
o Amp may be installed anywhere BUT in enclosed closet or cabinets with no
means for adequate air circulation. It is also not recommended to stack any
components directly on top of amp or to stack amp directly on top of any other
components. Never block ventilation in top of amplifier as this will prevent
cooling and can lead to damage of amplifier.
o Because amplifier operates in Class A/B, there is not a huge current draw at idle.
As such, you may leave the amp on when not in use and it will not draw more
than a few watts. It is recommended to disconnect amp power cord from wall if
unit will not be used for extended periods.
o Amplifier is equipped for operation with an earth ground provided by the user’s
AC outlet. It is recommended to only plug amp into AC outlets that are earthgrounded. Signal ground and chassis ground are both common to earth ground.
This ground connection should never be defeated or altered. It is grounded for
your safety.
Startup:
o First check to be sure that power plug is firmly seated and power cord is
connected to mains voltage as indicated on back panel of amplifier. US/Canada
120V, HK 220V, Europe and other countries 230V-240V.
o To power unit up, simply depress the power button on the faceplate, or the power
button on the remote control. When you do this, the unit will turn on and MWI
logo will illuminate blue. Right hand digital display (volume) will indicate via
alternating pattern, that unit is warming up and stabilizing. This will take
approximately 45 seconds, while amp output is muted. This is normal and is part
of the startup and stabilization sequence.
o If unit does not power up at this point, or shuts down in the process and the
displays read: “00” and “P5” (or “OOPS”) then there is a fault and the amp has
shut down on protection. Unplug amp, wait 30 seconds, plug back in, and initiate
startup sequence. If protection mod re-occurs, call your dealer or ModWright
service agent.
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