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KAC-728
KAC-628
KAC-528
POWER AMPLIFIER
INSTRUCTION MANUAL
B64-1360-00 (EM)
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Safety precautions 2WARNING NOTE • If you experience problems during To prevent injury and/or fire, take the installation, consult your Kenwood dealer. following precautions: • If the unit does not seem to be working right, • When extending the battery or ground consult your Kenwood dealer. cables, make sure to use automotive-grade 2 cables or other cables with an area of 5 mm (AWG10) or more to prevent cable Cleaning the unit deterioration and damage to the cable If the front panel gets dirty,
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Protection function This unit is equipped with a protection function for protecting this unit and your speakers from various accidents or problems that can occur. When the protection function is triggered, the Power indicator goes off and the amplifier stops operating. n Power indicator: When the power is turned on, the Power indicator lights. Power indicator If the Power indicator does not light when the power is turned on, the protection function may be activated. Check whether there is any in
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20 20 25 15 Controls Operations of the following control and switches are required in accordance with the center unit and speakers connected with this unit. SPEAKER LEVEL INPUT LEFT RIGHT FILTER OPERATION OFF LPF STEREO MONO(Lch) LINE IN 0.5 0.3 L R KAC-728 1.0 GND MIN MAX INPUT SENSITIVITY(V) 1 2 3 4 5 6 SPEAKER LEVEL INPUT FILTER OPERATION LEFT RIGHT OFF L+R HPF LPF STEREO MONO(Lch) LINE IN 0.5 0.3 L R 1.0 KAC-628 GND MIN MAX INPUT SENSITIVITY(V) 1 2 3 4 5 6 SPEAKER LEVEL INPUT LEFT RIGHT FIL
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1 RCA cable ground lead terminal 5 LINE IN terminal 2 FILTER switch 6 Speaker level input terminals These switches allow filtering of the 7 Fuse (20 A · 2 : KAC-728) speaker output signals. Fuse (25 A · 1 : KAC-628) KAC-628 KAC-728/528 FILTER Fuse (15 A · 1 : KAC-528) FILTER OFF OFF LPF HPF LPF 8 Battery terminal • HPF (High Pass Filter) position 9 Ground terminal (KAC-628 only) 0 Power control (REMOTE) terminal Only frequencies of 150 Hz or higher are output. (Frequencies below 150 Hz are cut.)
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Connection n RCA cable connection 2CAUTION Do not connect cables and leads to both RCA cable input jacks and the speaker input terminals simultaneously, for this may cause malfunction or damage. Left input Right input RCA cable ground terminal SPEAKER LEVEL INPUT FILTER OPERATION LEFT RIGHT STEREO MONO(Lch) OFF LPF LINE IN L R 0.5 0.3 1.0 GND MIN MAX INPUT SENSITIVITY(V) To Power control (REMOTE) terminal RCA cable (Commercially Left output (White) CENTER UNIT available part) (Cassette recei
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n Speakers cable connection (Stereo Connections) Left output Right output POWER IN GND BRIDGED BATT P.CON(REMOTE) LEFT RIGHT SPEAKER OUTPUT POWER AMPLIFIER Lead terminal (Commercially available parts) Right speaker Left speaker (Bridged Connections) POWER IN GND BRIDGED BATT P.CON(REMOTE) LEFT RIGHT SPEAKER OUTPUT POWER AMPLIFIER Lead terminal (Commercially available parts) n Speaker Selection • The rated input power of the speakers that are going to be connected should be greater than the maxi
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Connection n Power cable connection 2WARNING To prevent fire caused by a short in the wiring, connect a fusible link or breaker nearby the battery’s positive terminal. POWER IN GND BRIDGED BATT P.CON(REMOTE) LEFT RIGHT SPEAKER OUTPUT POWER AMPLIFIER Power terminal Round terminal (Small) Round terminal (Medium) CENTER UNIT Terminal cover Car fuse box Power control cable ACC (Commercially available parts) Battery cable Ground cable (Commercially available parts) (Commercially available parts)
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Example: One Power Amplifier Is Used Model Maximum Current Protective Fuse Cross-sectional Area of Wiring Drawn Cable (AWG) 2 KAC-728 28 A 50 A · 1 [25 A · 2] 5 mm (AWG 10) or greater · 1 2 KAC-628 19 A 30 A · 1 3 mm (AWG 12) or greater · 1 2 KAC-528 16 A 25 A · 1 3 mm (AWG 12) or greater · 1 25 A 50 A 25 A 25 A 25 A Installation Self-tapping screw (ø4 · 16 mm)
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System examples n Full-range 2-channel system KAC-728/528 L L Left speaker FILTER OPERATION OFF LPF STEREO MONO(Lch) CENTER UNIT R R Right speaker KAC-628 OPERATION FILTER OFF L+R MONO(Lch) HPF LPF STEREO Switch setting n High-power full-range 2-channel system L KAC-728/528 L L Left speaker (Bridged) FILTER OPERATION OFF LPF STEREO MONO(Lch) R R CENTER UNIT L L KAC-628 R Right speaker (Bridged) OPERATION FILTER R R OFF L+R HPF LPF STEREO MONO(Lch) Switch setting n Full-range 2-channel + Subwoofe
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Troubleshooting Guide What might appear to be a malfunction in your unit may just be the result of slight misoperation or miswiring. Before calling service, first check the following table for possible problems. PROBLEM POSSIBLE CAUSE SOLUTION No sound. • Input (or output) cables are • Connect the input (or output) (No sound from one side.) disconnected. cables. • Protection circuit may be • Check connections by referring activated. to "Protection function". • The fuse may be blown because • Rep
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Specifications Specifications subject to change without notice. Audio Section ..............................................KAC-728 KAC-628 KAC-528 Max Power Output (4 Ω) Normal..............................................................200 W · 2 100 W · 2 70 W · 2 Bridge ..............................................................600 W · 1 300 W · 1 200 W · 1 Rated Power Output (4 Ω) Normal (DIN45324, +B=14.4 V) ......................100 W · 2 50 W · 2 35 W · 2 Bridge (1 kHz, 0.8 % THD) ...
