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KAC-7251/7201(KE) 1English 02.11.14 10:30 AM Page 1
KAC-7251
KAC-7201
POWER AMPLIFIER 7 page 2-13
INSTRUCTION MANUAL
AMPLIFICATEUR DE PUISSANCE 7 page 14-25
MODE D’EMPLOI
AMPLIFICADOR DE POTENCIA 7 página 26-37
MANUAL DE INSTRUCCIONES
Take the time to read through this instruction manual.
Familiarity with installation and operation procedures will help
you obtain the best performance from your new power amplifier.
For your records
Record the serial number, found on the back of the unit, i
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dB +6 +9 OFF +12 KAC-7251/7201(KE) 1English 02.11.14 10:30 AM Page 2 Safety precautions Cleaning the unit 2WARNING If the front panel gets dirty, turn off the power To prevent injury or fire, take the following and wipe the panel with a dry silicon cloth or precautions: soft cloth. •When extending the ignition, battery, or 2CAUTION ground wires, make sure to use automotive- 2 grade wires or other wires with a 5 mm Do not wipe the panel with a hard cloth or a (AWG 10) or more to prevent wire
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dB +6 +9 OFF +12 KAC-7251/7201(KE) 1English 02.11.14 10:30 AM Page 3 Installation Remote controler (KAC-7251 only) Double-side tape Remote controler Remote cable Knob Self-tapping screw (ø4 × 16 mm) Cooling fan Self-tapping screw (ø3 × 12 mm) Dressing plate Washer Nut dB NOTE +6 +9 OFF +12 Mount the Dressing plate according to the mount angle of the Remote Controller. Fully rotate the knob Installation board, etc. counterclockwise (CCW), and adjust the (thickness : 15 mm or more) marking of
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KAC-7251/7201(KE) 1English 02.11.14 10:30 AM Page 4 Controls / Indicator (W) 40 20 10 12 345 1 LPF FREQUENCY control 4 OPERATION switch Sets the cutoff frequency when the FILTER This switch is used to select the operation switch is set to LPF. mode of the amplifier. • STEREO position: 2 FILTER switch The amplifier can be used as a stereo This switch allows to apply high-pass or amplifier. low-pass filtering to the speaker outputs. •MONO (Lch) position: • HPF (High-Pass Filter) position: Ampl
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KAC-7251/7201(KE) 1English 02.11.14 10:30 AM Page 5 Remote controler (KAC-7251 only) dB +6 +9 OFF +12 6 7 7 Power indicator ■ The protection function is When the power is turned on, the Power activated in the following indicator lights. situations: If the Power indicator does not light when This unit is equipped with a protection the power is turned on, the protection function for protecting this unit and your function may be activated. Check whether speakers from various accidents or there
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30 30 KAC-7251/7201(KE) 1English 02.11.14 10:30 AM Page 6 Connection ■ Terminal names 89 0! @ # $% ^ & 8 Fuse (30 A × 2) # RCA cable ground lead terminal When using an RCA cable with a ground 9 Battery terminal lead attached, connect the ground lead to 0 Ground terminal this terminal. ! Power control terminal $ LINE IN terminal Controls the unit ON/OFF. % LINE OUT terminal NOTE The signal that’s input from the line input terminal is output. Controls the unit power. Be sure to connect it wi
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KAC-7251/7201(KE) 1English 02.11.14 10:30 AM Page 7 ■ Installation procedure ■ Wiring Since there are large variety of settings and • Take the battery wire for this unit directly connections possible according to applications, from the battery. If it's connected to the read the instruction manual well to select the vehicle’s wiring harness, it can cause blown proper setting and connection. fuses etc. 1. Remove the ignition key and disconnect the • If a buzzing noise is heard from the speaker
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KAC-7251/7201(KE) 1English 02.11.14 10:30 AM Page 8 Connection ■ RCA cable or Speaker level input connection (RCA cable Connections) RCA cable ground terminal # RCA cable* # $ CENTER UNIT (CD receiver, etc.) Right input Left input Power control wire (Blue/ White) (Speaker level input Connections) Cable Color of the connector Genuine-accessory car White Left stereo (No line output White/Black center unit etc.) Gray Right Car fuse box Gray/Black & Battery ACC ■ Remote cable connection (KAC
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30 30 30 30 30 30 KAC-7251/7201(KE) 1English 02.11.14 10:30 AM Page 9 * Commercially available parts ■ Speaker wire connection (Stereo Connections) Left @ @ speaker Right Lead terminal* speaker (Bridged Connections) Speaker (Bridged) @ ■ Power wire connection 90 ! Lead terminal* Terminal cover Extension wire* Battery wire* Ground wire* Protective Fuse* Battery English 9
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KAC-7251/7201(KE) 1English 02.11.14 10:30 AM Page 10 System examples ■ 2-channel system Left speaker L L CENTER UNIT R R Right speaker 23 4 ■ High-power 2-channel system ¡ L L L Left speaker (Bridged) R R CENTER UNIT L L R Right speaker (Bridged) R R ™ ¡ ™ 23 4 ■ 2-channel + Subwoofer system ¡ Left speaker (High pass) L L CENTER UNIT Right speaker (High pass) R R LINE OUT Subwoofer L L (L + R) R R (Bridged) ™ ¡ 23 4 ™ 23 4 10 English
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KAC-7251/7201(KE) 1English 02.11.14 10:30 AM Page 11 ■ Tri-mode L C L L Subwoofer (High pass) CENTER UNIT (L + R) (Bridged) R R C 23 4 ●Principle of Tri-mode Method of frequency band division using a coil and capacitor…in case of 6dB/oct. slope Coil (L): Passes low frequencies and blocks high Crossover Frequency frequencies. (Low pass) 0 dB Capacitor (C): Passes high frequencies and blocks low -3 dB frequencies. (High pass) L C 159000 C= (µF) fc x R fc=Cut of Frequency (Hz) F
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KAC-7251/7201(KE) 1English 02.11.14 10:30 AM Page 12 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 "In
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KAC-7251/7201(KE) 1English 02.11.14 10:30 AM Page 13 Specifications Specifications subject to change without notice. Audio Section Max Power Output ............................................................................................................800 W × 1 Rated Power Output Normal (4 Ω) (20 Hz – 20 kHz, 0.08 % THD) ....................................................................150 W × 2 Normal (4 Ω) (DIN : 45324 , +B = 14.4V) ...................................................
