Polk Audio® - 4" x 6"
SPEAKERS
Getting Started
Please inspect your loudspeakers carefully. Notify your Polk Audio dealer if you notice any damage or missing items.
Keep the carton and packing material; this will do the best job of protecting your loudspeakers if they must be transported.
Safe Limits of Operation
Damage to loudspeakers can occur when an amplifier, regardless of its wattage, is made to play at higher listening levels
than it can produce at low distortion levels. This is usually beyond the “noon or 1 o’clock” position on the volume control.
Operation at this level can result in very high levels of audible distortion originating in the amplifier, which can add a harsh,
gritty sound to your listening material. Contrary to popular belief, a loudspeaker is more likely to be damaged by trying to get
too much volume from a low-powered amplifier or receiver than from a high-powered one.
Coaxial speaker
Figure 1
BASIC COAXIAL CONNECTION
Amplifier
Figure 2
BASS BLOCKER db351 WIRING CONNECTION
Amplifier
Bass Blocker
Crossover
Figure 3
BASIC COMPONENT CONNECTION
INSTALLING db5251& db6501
Tweeter
Amplifier
–
+
Mid-Woofer
Figure 4
INSTALLING db351 ROUND
MODEL
Figure 5
INSTALLING db401, db501, db521, db651,
db651s, db5251, db6501 ROUND MODELS
Figure 6
INSTALLING db461, db461p, db571,
Figure 7
INSTALLING db691
OVAL MODEL WITH GRILLE
Remove bottom mount spacer
ring before installing grille.
Figure 8
INSTALLING db401, db521, db5251, ROUND
MODELS WITH GRILLE
Figure 9
INSTALLING db651s, db651& db6501
WITH GASKET AND GRILLE
Figure 10
INSTALLING db6501/db651 WITH GRILLE
Some applications may require using the
additional spacer/adapter bracket.
SPACER/ADAPTER BRACKET
(for db6501/db651
driver installation only)
Figure 11
CROSSOVER MOUNTING Allow
for ventilation clearance.
Figure 12
TWEETER ATTENUATION SWITCH
A 3-position switch (-3dB, 0dB, +3dB ) allows you
to adjust tweeter level for the tonal balance that's
right for your car and system.
Figure 13
TWEETER ATTENUATION WIRE LOOP
Cut this wire to reduce tweeter level 3dB.
DB6501 & DB5251
Figure 14
Flush Mount
TWEETER MOUNTING
1. Check for proper clearance: The flush mount
kit is 7/8" (22.2mm) deep.
2. Mark the center of the spot and cut a
2" (50.8mm) diameter hole using a hole
saw, drill bit or razor knife.
3. Assemble the cup, clamp and machine
screw loosely as shown.
4. Route wires through the round opening in the
bottom of the cup.
5. Press the assembly into the 2" (50.8mm) diameter
hole until the clamp edge is below the mounting
surface, then tighten the screw. The legs of
the clamp can be bent outward by inserting
a screwdriver through the holes in the cup
while still mounted.
6. Connect wires from the tweeter terminals of the
Crossover to the tweeter itself using the faston
connectors. Connect the red wire from the (+)
terminal of the Crossover tweeter output to
the red (+) wire from the tweeter.
7. Mount the tweeter by snapping it into the
mounting cup.
DB6501 & DB5251
Figure 15
Surface Mount
TWEETER MOUNTING
1. Using the base of the surface mount cup as
a template, mark the screw hole and drill them
using a 1/8" (3mm) drill bit. Drill a second hole
(for the speaker wire) using a 3/16" (5mm) drill bit.
2. Screw surface mount cup to the panel.
3. Push the tweeter wires through the open area at
the bottom of the cup and through the 3/16" (5mm)
hole in the panel.
4. Connect wires from the tweeter terminals of
the Crossover to the tweeter wires using faston
connectors. Be sure to connect the red wire
strand from the tweeter to the (+) terminal
of the crossover tweeter output.
5. Mount the tweeter by snapping it into the
mounting cup.
db Series Full Range/Component Systems Specifications
Type
db351
3 1/2"
coaxial
db401
4"
coaxial
db461
4" x 6"
coaxial
db461p
4" x 6"
plate
db501
5"
coaxial
db521
5 1/4"
coaxial
................................................................................................................................................................................................................
Driver
complement
3 1/2"
(8.89cm)
mid/woofer
4"
(10.2cm)
mid/woofer
4" x 6"
(10cm x 15cm)
mid/woofer
4"
(10.2cm)
mid/woofer
5"
(12.7cm)
mid/woofer
5 1/4"
(13.0cm)
mid/woofer
................................................................................................................................................................................................................
Tweeter
complement
1/2" (12mm)
soft dome
tweeter
3/4" (19mm)
soft dome
tweeter
3/4" (19mm)
soft dome
tweeter
3/4" (19mm)
soft dome
tweeter
3/4" (19mm)
soft dome
tweeter
3/4" (19mm)
soft dome
tweeter
................................................................................................................................................................................................................
Mounting
dimensions
3 1/8"
(79.36mm)
4"
(101.6mm)
6" x 4"
6" x 4"
4"
4 11/16"
(152.4mm x
(152.4mm x
(101.6mm)
(119mm)
101.6mm)
101.6mm)
................................................................................................................................................................................................................
Mounting
1 1/2"
1 13/16"
1 15/16"
1 13/16"
1 13/16"
2 5/16"
depth (top)
(38.1mm)
(46.0mm)
(49.2mm)
(46.04mm)
(46.0mm)
(58.7mm)
................................................................................................................................................................................................................
Mounting
1 11/16"
1 15/16"
2"
2"
1 15/16"
2 7/16"
depth (bottom)
(42.86mm)
(49.21mm)
(50.8mm)
(50.8mm)
(49.21mm)
(61.9mm)
................................................................................................................................................................................................................
Peak
105w
135w
120w
150w
135w
135w
Power handling
................................................................................................................................................................................................................
Continuous
35w
45w
40w
50w
45w
45w
Power handling
................................................................................................................................................................................................................
Nominal
4Ω
4Ω
4Ω
4Ω
4Ω
4Ω
Impedance
................................................................................................................................................................................................................
90-22kHz
85-22kHz
75-22kHz
71-22kHz
65-22kHz
60-22kHz
Frequency
response
................................................................................................................................................................................................................
Grille height
n/a
3/4"
n/a
n/a
n/a
1"
(6.35mm)
(25.4mm)
................................................................................................................................................................................................................
Sensitivity
91dB
91dB
91dB
91dB
93dB
93dB
................................................................................................................................................................................................................
db Series Full Range/Component Systems Specifications
db571
5" x 7"
coaxial
db651
6 1/2"
coaxial
db651s
db691
db5251
db6501
db1001
6 1/2"
6" x 9"
5 1/4"
6 1/2"
1"
slim mount
three way
component
component
tweeter
coaxial
system
system
................................................................................................................................................................................................................
5" x 7”
6 1/2"
6 1/2"
6" x 9"
5 1/4"
6 1/2"
n/a
(12.7cm x
(16.0cm)
(16.0cm)
(15cm x 22.9cm)
(13.0cm)
(16.0cm)
mid/woofer
17.8cm)
mid/woofer
mid/woofer
mid/woofer
mid/woofer
mid/woofer
mid/woofer
................................................................................................................................................................................................................
3/4" (19mm)
soft dome
tweeter
3/4" (19mm)
soft dome
tweeter
3/4" (19mm)
soft dome
tweeter
1" (25.4mm)
1" (25.4mm)
1" (25.4mm)
1" (25.4mm)
soft dome
soft dome
soft dome
soft dome
tweeter
tweeter
tweeter
tweeter
3/4" (19mm)
soft dome tweeter
................................................................................................................................................................................................................
7 1/8" x 4 15/16"
5"
5"
8 1/2" x 5 3/4"
4 11/16"
5"
2 1/16"
(181mm x
(127mm)
(127mm)
(215.9mm x
(119mm)
(127mm)
(52.39mm)
125.4mm)
146mm)
mounting cup
................................................................................................................................................................................................................
2 3/16"
2"
2"
3 3/16"
2 5/16"
2"
1 3/16"
(55.6mm)
(50.8mm)
(50.8mm)
(81.0mm)
(58.7mm)
(50.8mm)
(30.2mm)
................................................................................................................................................................................................................
2 5/8"
2 5/16"
2 5/16"
3 3/4"
2 7/16"
2 5/16"
1 1/32"
(66.7mm)
(58.74mm)
(58.7mm)
(95.2mm)
(61.9mm)
(58.7mm)
(26.2mm)
................................................................................................................................................................................................................
180w
180w
165w
300w
250w
300w
180w
................................................................................................................................................................................................................
60w
60w
55w
100w
100w
100w
60w
................................................................................................................................................................................................................
4Ω
4Ω
4Ω
4Ω
4Ω
4Ω
4Ω
................................................................................................................................................................................................................
52-22kHz
35-22kHz
50-22kHz
35-22kHz
53-23kHz
35-23kHz
4kHz-23kHz
................................................................................................................................................................................................................
n/a
1 1/8"
1 1/8"
1 1/4"
1"
1 1/8"
n/a
(28.58mm)
(28.58mm)
(31.75mm)
(25.4mm)
(28.58mm)
................................................................................................................................................................................................................
93dB
92dB
92dB
93dB
93dB
92dB
92dB
......................................................................................................................................................................................
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