Panasonic SB-AK450PL User manual

Type 3 way, 3 speaker system (Bass reflex)
Speaker(s)
Woofer 16 cm cone type
Tweeter 6 cm cone type
Super tweeter Piezo type
Impedance
HIGH 3 Ω
LOW 3Ω
Input power (IEC)
HIGH 115 W (Max)
LOW 115 W (Max)
Output sound pressure level 88 dB/W (1.0 m)
1 System Combination 3
1.1. System Breakdown 3
2 Assembling and Disassembling 4
2.1. Caution 4
2.2. Disassembly Procedures 4
2.3. Disassembly Flow Chart 4
2.4. Disassembly of Rear cabinet assembly 5
©2007 Matsushita Electric Industrial Co. Ltd.. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
SB-AK450PL
Colour
(K)...Black Type
Cross over frequency 1.5kHz,10kHz
Frequency range 35 Hz to 24 kHz (-16 dB)
41 Hz to 27 kHz (-10 dB)
Dimensions (W X H X D) 232 X 373 X 226 mm
Mass 3.4 kg
Notes:
1. Specifications are subject to change without notice. Mass and
dimensions are approximate.
2. Total harmonic distortion is measured by the digital spectrum
analyzer.
3. The labels “HIGH” and “LOW” on the rear of the speakers refer to
High frequency and Low frequency.
2.5. Disassembly of Woofer 6
2.6. Disassembly of Tweeter 6
2.7. Disassembly of Piezo 7
3 Connection of the Speaker Cables 8
4 Connection of the Wiring Diagram 9
5 Exploded Views 11
5.1. Cabinet Parts Location 11
Speaker System
Specifications
CONTENTS
Page Page
ORDER NO. MD0703008CE

5.2. Packaging 12 6 Replacement Parts List 13
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SB-AK450PL

1 System Combination
1.1. System Breakdown
Note:
The table below show the breakdown for speaker combinations used in main unit system.
System SC-AK450PL-K
Music Center SA-AK450PL-K
Front Speakers SB-AK450PL-K
System SC-AK450GCP-K
Music Center SA-AK450GCP-K
Front Speakers SB-AK450PL-K
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2 Assembling and Disassembling
2.1. Caution
“Attention Servicer”
Some chassis components may have sharp edges.
Be careful when disassembly and servicing.
1. This section describes procedure for checking the operation of replacing the main components.
2. For reassembly after operation checks or replacement, reverse the respective procedures.
3. Select items from the following index when checks or replacement are required.
4. Refer to the Part No.on the page of “Parts Location and Replacement Parts List” (Section 6) if necessary.
2.2. Disassembly Procedures
· Disassembly of Rear cabinet assembly
· Disassembly of Woofer
· Disassembly of Tweeter
· Disassembly of Piezo
2.3. Disassembly Flow Chart
The following chart is the procedure for disassembly the casing and inside parts for internal inspection when carrying out the
servicing.
To assemble the unit, reverse the steps shown in the chart as below.
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2.4. Disassembly of Rear cabinet
assembly
Step 1: Remove 4 screws from front panel.
Step 2: Insert flathead screwdriver into the grooves to push the
front panel as arrow shown.
Step 3: Detach the front panel as arrow shown.
Step 4: Detach the (+) red and (-) black wires from woofer.
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Step 5: Detach the (+) gray and (-) blue wires from tweeter.
Step 6: Remove the rear cabinet assembly.
2.5. Disassembly of Woofer
Follow the (step 1) to (step 4) in item 2.4.
Step 1: Remove 4 screws from woofer.
Step 2: Remove the woofer.
2.6. Disassembly of Tweeter
Follow the (step 1) to (step 3) in item 2.4.
Step 1: Detach the (+) red and (-) black wires from tweeter.
Step 2: Remove 4 screws from tweeter.
Step 3: Remove the tweeter.
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2.7. Disassembly of Piezo
Follow the (step 1) to (step 3) in item 2.4.
Follow the (step 1) in item 2.6.
Step 1: Remove the glue from piezo.
Step 2: Remove the piezo.
For assembly of piezo, follow the steps below:
1. Clear up areas on the piezo.
2. Apply glue to piezo and paste to the front panel.
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SB-AK450PL

· Be sure to connect speaker cables before connecting the
AC power supply cord.
· The load impedance of any speaker used with this unit must
be 3 Ω.
· Be sure to connect the cable from the right speaker to the
right terminal and the cable from the left speaker to the left
terminal.
Placement
Speakers are designed identically so that no left or right
channel orientation is necessary.
Connection
Use only the supplied speakers.
The combination of the main unit and speakers provide the
best sound. Using other speakers can damage the unit and
sound quality will be negatively affected.
Notes:
· Keep your speakers at least 10mm away from the system
for proper ventilation.
· These speakers do not have magnetic shielding. Do not
place them near televisions, personal computers or other
devices easily influenced by magnetism.
· You can damage your speakers and shorten their useful life
if you play sound at high levels over extended periods.
· Reduce the volume in the following cases to avoid damage.
− − −
− When playing distorted sound.
− − −
− When adjusting the sound quality.
3 Connection of the Speaker Cables
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4 Connection of the Wiring Diagram
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