Audio Space AS-300BmkII Instruction Manual
hank you for using our AUDIO SPACE AS-300BMKII integrated vacuum tube
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amplifier. Please read this operation manual carefully before using it.
I SPECIFICATIONS
■ Power Output 2×8watts (RMS,8Ω)
■ Frequency response 10Hz~20kHz -0.5dB
■ THD 2%
■ S/N ratio 85dB
■ Input impedance 100kΩ
■ Input sensitivity 300mV ( Input2, Integrated)
600mV ( Input1, Direct-in)
■ Output impedance 4Ω,8Ω
■ Power requirements 220VAC±5%, 50/60Hz
■ Weight 21.3kg
■ Dimension 350×410×190mm(W×L×H)
II OPENING THE PACKAGE
Please check the carton carefully whether there are any damages before you open it.
Put it on a flat surface with the arrow upward. Rip away the sealed tape and open the
carton, then you’ll find:
① an amplifier of AUDIO SPACE AS-300BMKII,
② an operation manual,
③ a warranty card,
④ a power supply cord,
⑤ two fuses.
Note: Please fill out your warranty card in time, and hand it in to your dealer or
send it to the sales department of our company to ensure the after-sales service.
Take out the amplifier carefully, watch the front panel and read the diagram 1. Then
watch the rear panel and read the diagram 2.
Note: Be sure to use at rated voltage. Please check whether the rated voltage
marking on the back plate corresponds to your line voltage. If not, please contact your
dealer.
Suggestion: Please keep the carton and the other wrappings well, perhaps you’ll use
them when move the amplifier.
III CONNECTION
Select the suitable output impedance for your speaker and connect the amplifier to
the speaker with sound specialized line, don’t confuse L with R.
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Connect the amplifier to your sound source, don’t confuse L with R. Select the
suitable input way for sound source.
Then connect the power cord. At first insert the cord plug into the power socket,
and next, insert the other end of the cord into an electrical outlet.
IV TURNING ON
Note: Be sure to adjust the volume to the lowest position before turning on the
amplifier.
When you’re sure the connections are right, turn it on by turning the power button,
then the indication lamp will light up, indicating the amplifier is working. After
preheating for several minutes, the amplifier will work normally. Then you can
advance the volume to the level you want and enjoy the music.
Caution: To prevent damage to the amplifier, never cut off the speaker cable while
the unit is on.
Note: Never exchange the position of the vacuum tubes. You can see the tube
positions in diagram 3.
V WARNING
● Be careful when carrying in order to avoid damaging.
● To reduce the risk of electric shock, don’t remove the cover.
● Don’t attempt to repair the product by yourself.
● No user serviceable parts inside. Refer servicing to qualified service personal.
● Keep liquid away from the amplifier. If you spill liquid into the unit, pull out the
power plug at once and consult your dealer.
CAUTION: BEFORE OPERATING THIS NEW PRODUCT, PLEASE CAREFULLY
READ THIS OPERATION MANUAL AND THEN SAVE IT FOR FUTURE
REFERENCE. IT WILL BE USEFUL IF YOU HAVE ANY DIFFICULTIES IN
OPERATING THIS NEW PRODUCT IN THE FUTURE.
1. It is dangerous to use this new product if
This product begins to smoke, smell, or make strange sounds. If this happens, immediately
switch off the power, unplug the power cord and contact the nearest authorized service
center.
2. Never remove the bottom cover
Do not remove the bottom cover of this product. Touching high voltage parts inside the
cabinet can result in electric shock and/or damage to the unit. This product contains
sufficient levels of voltage and current to be “lethal”. Do not tamper with a component or
part inside the unit. Even with the power turned off, a charge remains in the energy storage
capacitors for some time. Refer adjustment inside the cabinet and any needed service to
your authorized Houston dealer or other qualified technician.
3. Avoid exposing this product to direct sunlight, dust, heat sources or moisture
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Do not place this product in a location where it is exposed to direct sunlight, dust, heat
sources, high humidity, kitchen smoke, etc., as these may cause malfunctions.
4.
Select a safe and well-ventilated location
Select a safe location from children, dog and cat to keep they or it cannot be easy to touch
the vacuum tubes and the product.
The cabinet has air vents to allow heat to escape. Obstructing these air vents may result in
malfunction or, in some cases, fire. Always observe the following guidelines:
Keep this product 10cm or more away from walls.
Do not place this product in a confined spaces with poor ventilation.
5. Handling the power Cord
Using a damaged power cord, or one with the bare wires exposed, could cause fire or result
in electric shock. Always observe the following guidelines:
When unplugging from the AC mains, never pull the cord. Always grip the plug when
unplugging the power cord.
Never place this product itself, furniture, rugs or other heavy objects on the power
cord.
If the power cord must pass near a heater, make sure the cord is far enough from the
heater, that the cord under no circumstances will melt or come in contact with the
heater.
If the power cord is damaged, immediately purchase a new one from the nearest
service center approved by Houston.
6. When the product will not be used for an extended period of time
If you go away on holiday or otherwise will be absent for a long time, as a safety
precaution, unplug the power cord from the AC mains or press the mains power switch (OI)
to move it from ON to OFF.
7. Do not place objects containing liquids on top of this product
Do not place any objects containing water or other liquids on this product.
If liquids enters this product, it can cause malfunction, electrical shock or fire. If
liquid should enter the cabinet, unplug the power cord from the AC mains and contact
the nearest service center approved by Houston.
8. Never insert objects into this product
Do not insert or drop metallic or inflammable objects into this product through the air vents,
as this can cause serious damage, electrical shock, or possibly fire.
9. Keep the product away from strongly magnetic objects.
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