Legacy LA4670-SL BK Manual

INTRODUCTION
Congratulations on your purchase of a LEGACY ICON Car Amplifier. The unit is the result of an
extensive engineering project to create the finest automotive high fidelity product available. It is
superior in performance and has the ability to operate under extreme environmental conditions.
If you are incorporating more than one amplifier. Please consider adding a P.W.M. preamp E.Q. to
boost head unit signals, so you can obtain maximum power, with minimum power supply strain.
You will find that you can reduce your gains to about 50% and achieve the same output wattage to
your speakers which will leave lots of dynamic headroom for Strong bass transients. A P.W.M. E.Q.
will deliver four times the voltage to your amps and reduce the possibility of engine noise.
To fully understand the unit capability, please read this manual carefully and follow all of the
instructions regarding its use and installation.
SPECIFICATIONS
MODELS
RMS Power @ 4 ohms
Max Power @ 2 ohms
Bridged Power @ 4 ohms
Signal to noise ratio (JIS-A WTD)
Frequency response
Channel separation
THD
low
Input Sensitivity
high
Crossover frequency
MODELS
RMS Power @ 4 ohms
Max Power @ 2 ohms
Signal to noise ratio (JIS-A WTD)
Frequency response
Channel separation
THD
low
Input Sensitivity
high
Crossover frequency
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FEATURES
Amplifiers: LA4670-SL(BK), LA2770-SL(BK), LA2970-SL(BK)
Bridgeable MOSFET Amplifier
Tri-Mode Capable
Heavy Duty Aluminum Alloy Heatsink
Class A-B Operation
Continuously Variable Low Pass Crossover (30 Hz to 300 Hz)
High Pass Crossover (200 Hz fixed)
Continuously Variable Input Gain Control
Silver Plated RCA and Speaker Level Inputs
Remote Turn On/ Turn Off Circuit
MOSFET Pulse Width Modulated Power Supply
2 Ohm Stable Stereo Operation with Output Power Increase
Soft Turn-On Circuit
Thermal and Speaker Short Protection Circuitry
LED Power and Protection Indicators
Amplifiers: LA1110-SL(BK), LA1270-SL(BK)
Monoblock MOSFET Amplifier
Heavy Duty Aluminum Alloy Heatsink
Class A-B Operation
Continuously Variable Low Pass Cros sover:
LA1110-SL(BK) - 35Hz to 160Hz
LA1270-SL(BK) - 40Hz to 130Hz
High Pass Cros sover (200 Hz fixed)
Continuously Variable Input Gain Control
Bass Boost Control:
LA1110-SL(BK) - swith 0 or 18dB
LA1270-SL(BK) - variable 0 to 12dB
Remote Subwoofer Level Control
Silver Plated RCA and Speaker Level Inputs
Remote Turn On/ Turn Off Circ uit
MOSFET Pulse Width Modulated Power Supply
2 Ohm Stable Stereo Operation with Output Power Increase
Soft Turn-On Circ uit
Therm al and Speaker Short Protection Circ uitry
LED Power and Protection Indicators
Built-in Crossover
The 2 CH and 4 CH amplifiers are feature a continuously variable low pass and fixed high pass
crossover.
The monoblock amplifiers feature adjustable low pass
crossovers and fixed high pass crossovers, as well as Bass Boost contr o l.
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