MUSIC HALL a25.3 User manual

a25.3
music hall
bass
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treble
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balance
bluetooth optical cd aux phono line in
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line in head ph one
a25.3 integrated amplifier
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music hall
a25.3 integrated amplifier
Congratulations On Your Purchase
You have selected a state-of-the-art integrated amplifier. Each component chosen for
assembly in the construction of the Music Hall a25.3 was selected to provide you with
superior performance and the highest level of sound reproduction available today. We
know of no integrated amplifier that costs as much to produce that sells for so little.
Please take a few moments to read over the instruction manual to ensure that you get the
best performance from your unit and years of trouble-free service.
SAFETY GUIDELINES
This product is designed and manufactured to strict quality and safety standards.
However, you should be aware of the following installation and operation precautions:
1. Take heed of warnings and instructions
Read all the instructions before connecting or operating the unit.
Keep this manual so you can refer to these safety instructions. Heed all warnings and
safety information in these instructions and on the unit.
2. Water and Moisture
To reduce the risk of fire or electric shock, do not expose the unit to moisture or water. If
the unit is exposed to moisture, immediately disconnect the power cord from the wall.
Take the unit to an authorized music Hall service center for inspection. Do not touch the
unit, power cord, or plug with wet hands.
3. Object or liquid entry
Do not allow foreign objects or liquids into the unit. If this happens, immediately
disconnect the power cord from the wall and take the unit to an authorized Music Hall
service center for inspection.
4. Ventilation
Please allow 2 inches (5 cm.) of unobstructed clearance around the unit. Do not place the
unit on a bed, sofa, rug, or similar surface that could block ventilation from the bottom.
Do not stack another component on top of the amplifier. If the component is placed in a
bookcase or cabinet, it must be ventilated to allow proper cooling.
5. Heat
Keep the unit away from naked flames, radiators, heat registers, stoves, or any other heat-
producing appliances (including amplifiers).
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music hall
a25.3 integrated amplifier
6. Climate
The unit has been designed for use in moderate climates. Do not attempt to use below 41
degrees Fahrenheit (5 degrees Celsius) or above 95 degrees Fahrenheit (35 degrees
Celsius).
7. Rack and Stands
Place the unit on a fixed, level surface strong enough to support its weight. Do not place
it on a moveable cart that could tip over. We recommend only using stands approved for
use with audio equipment.
8. Cleaning
Unplug the unit from the mains supply before cleaning. The case should normally require
only a wipe with a soft lint-free cloth.
9. Power Sources
Only connect the unit to a power supply of the type and voltage described in the operating
instructions or specified on the rear panel of the unit.
10. Power cord protection
Connect the unit to the power outlet only with the cord supplied. Do not modify the
supplied cable in any way. Do not attempt to defeat grounding and/or polarization
provisions. Do not use extension cords. Do not route the power cord where it will be
crushed, pinched, bent at severe angles, exposed to heat, or damaged in any way.
11. Non-use periods
If the unit is to be left unused for a long period of time, the power cord should be
unplugged from the wall outlet.
12. Damage Requiring Service
Stop using the unit immediately and have it inspected by an authorized Music Hall service
center whenever:
1. The power supply cord or plug has been damaged.
2. Liquid has been spilled into the unit.
3. The unit has been exposed to rain.
4. The unit does not operate properly.
5. The unit has been dropped or damaged.
6. Smoke or any unusual smell is detected from the unit.
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a25.3 integrated amplifier
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE
COVER. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.
Indicates that the user of this unit must understand important operation and
maintenance instructions.
Indicates high-voltage power inside the unit, which will cause electric shock.
Getting Started
Thank you for purchasing the Music Hall a25.3 The a25.3 is a classic two-channel
integrated amplifier designed for the music lover. We chose a select group of
technologically advanced components to create this powerful 75 watt/channel into 4
Ohms and 50 into 8 ohms, integrated amplifier. It also has an optical input and a Bluetooth
receiver. When used in a top-end audio system, your music Hall integrated amplifier will
provide years of enjoyment. The a25.3 is the perfect complement to Music Hall’s
cd25.3 cd player.
A Few Precautions
Please read this manual carefully. In addition to installation and operating instructions, it
provides valuable information that will help you get optimum performance from your
system. Please contact your authorized Music Hall dealer for answers to your questions. In
addition, all of us at music Hall welcome your questions and comments. Save the
shipping carton and all enclosed packing material for future use. Shipping or
moving the unit in anything other than the original packing material may result in severe
damage that is not covered by the warranty. Be sure to keep the original sales receipt. It
is your best record of the date of purchase, which you will need in the event warranty
service is required.
Placement
Use common sense when placing the a25.3. Always place it on a firm, level surface.
Blake sure that the shelf or cabinet can support the weight. Ensure that there is adequate
ventilation around all sides of the unit. Avoid placing the a25.3 where it may be subject to
excessive heat, such as near a heat register. Do not place anything on top of it. For best
performance, avoid placing the a25.3 where it may be subject to vibration, such as near a
speaker.
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DO NOT REMOVE COVER (OR BACKS
NO USER SERVICEABLE PARTS INSIDE

a25.3 integrated amplifier
OPTICAL: Connect the amplifier to the digital output on your CD player
/ computer / games console / network player, etc. by using an optical digital
audio cable.
ANTENNA: Connection for Bluetooth, keep it vertical.
POWER SWITCH: Switches the device on and sets it in the standby mode. If
the switch is set to the “OFF" position, the device is disconnected from the
mains supply.
musi c hall

a25.3 integrated amplifier
push the power button to turn on the a25.3. select your desired source via the push
buttons on the front panel, adjust volume, and enjoy.
led status indication: If the led is illuminated blue: the a25.3 is switched on indicating that the
device is ready for use.
If the led is illuminated red, the a25.3 is in standby mode.
The 6.3 mm stereo output jack is for headphones. The speakers are deactivated when this
jack is used. Please set the volume to a low level before connecting the headphones.
bass/treble. The bass and treble knobs can be used to enhance or diminish
bass or treble. Balance knob can adjust the level of the right or left channels
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bass
treble
balance
bluetooth
optical
cd
aux
phono
line in
power
line in headphone
volume
a25.3 integrated amplifier

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a25.3 integrated amplifier
turn on the device or enter standby mode
backwards, pauses, playback, forwards track using bluetooth
pairing equipment using bluetooth
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X
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music hall
a25.3 integrated amplifier
Technical Specification
Input sensitivity RCA: 0.65V
Phono (NNI): 5mV
Power output 50W@8ohm
75W@4ohm
LINE OUT 0.65V
SNR >90dB
THD+N <0.02%(20Hz-20KHz)
Frequency response RCA: 20Hz-20KHz(-0.5dB)
PHONO: RIAA compliant
Analog inputs
Digital inputs
3 x line level, 1 x phono
1 x optical level, 1 x bluetooth level
Physical
Dimensions w16.9 x d12.6 x h3.5 in. (w430 x d321 x h90 mm)
Weight 14.3 lbs. (6.5 kg.)
Supplied Accessories power cord, remote control, 2 x AAA batteries
USA This product complies with FCC requirements
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music hall
a25.3 integrated amplifier
Troubleshooting
No LED indicating Volume or Source
Check:
that the power switch is on
that the power cord is connected securely
that there is power at the wall outlet
the fuses after unplugging the power cord
No Sound
Check:
that the volume control isn’t at zero
that the unit is not in "mute" mode
the selected input is playing
the headphones are unplugged
all interconnect cables are making good connection
speaker wires are securely connected
Weak Bass/Confused Stereo Image
Check:
that the speaker wiring is in phase (positive on the speaker connector is
connected to positive on the amplifier and likewise for the negative
confirm that all speaker and interconnect cable connections are secure
Distorted Sound
Check:
that the volume isn't too high
Remote Control not functioning
Check:
that there are no obstacles between the remote and the unit
that the bateries are fresh and not expired
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music hall
a25.3 integrated amplifier
Guarantee
This entitles you to have the Music Hall a25.3 repaired or replaced, at our discretion, free
of charge for one year after purchase, at any authorized Music Hall dealer, provided the
unit was purchased from an authorized dealer. Your original sales receipt is used as proof
of purchase date. Music Hall can take no responsibility for defects arising from accident,
misuse, abuse, wear and tear, neglect or through unauthorized repair and or adjustment.
Neither can Music Hall accept responsibility for damage or loss occurring during transit to
or from the person claiming under the guarantee.
Warranty
Your Music Hall a25.3 warranty covers parts and labor costs for one year from the
purchase date. After one year, you must pay for both parts and labor costs. The warranty
does not cover transportation costs at any time.
Claims under guarantee
The unit should be packed in the original packing and returned to the dealer from whom it
was purchased, or to an authorized Music Hall service center. It should be sent by a
reputable carrier, carriage prepaid. Do not send the unit via USPS (United States Postal
Service). No responsibility can be accepted for the unit while in transit to the dealer,
customer, or authorized service agent, therefore, customers are advised to insure the unit
against loss, damage, or theft while in transit.
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