PowerAcoustik LFA-5500 User manual

LFA4-840 / LFA4-1200 / LFA4-1600
LFA1-2000D / LFA1-4000D / LFA1-5500D
LFA2-420 / LFA2-600 / LFA2-800
LFA2-1250 / LFA2-1800 / LFA2-2200 / LFA2-2600
OWNERS MANUAL

- 2 -
INTRODUCTION
Power Acoustik amplifiers provide high-performance sound reinforcement for your
mobile audio equipment. Its versatility enables compatibility with optional Equalizers,
Frequency Dividing Crossover Networks, and other audio processors in a customized
system. The Multi-Mode bridging capabilities allow flexibility in hosting several different
speaker configurations.
To achieve optimum performance, it is highly recommended that you read this
Owners Manual before beginning installation.
WARNING
High powered audio systems in a vehicle are capable of generating "Live Concert"
high levels of sound pressure. Continued exposure to excessively high volume sound
levels may cause hearing loss or damage. Also, operation of a motor vehicle while
listening to audio equipment at high volume levels may impair your ability to hear
external sounds such as; horns, warning signals, or emergency vehicles, thus
contributing to a potential traffic hazard. In the interest of safety, Power Acoustik
recommends listening at lower volume levels while driving.

- 3 -
Before beginning the installation, consider the following:
1. Do you plan to add additional mobile electronics equipment in the future?
If you plan to expand your system by adding other components sometime in the
future, ensure adequate space is left and cooling requirements are met.
2. Should you use high or low level inputs?
Your Amplifier has been designed to accept Low-Level(Pre-Amp outputs from your
radio) source signal. If your radio/source is equipped with Pre-Amp outputs, it is
possible to utilize them to drive the Amplifier and the 2 front speakers. Then, use the
built-in power of your radio to drive the 2 rear speakers.
3. Are your components matched?
The RMS power rating of your speaker(s) must be equal or greater than the RMS
power rating of your amplifier. Your speaker(s) also must be 2 - 8 Ohms impedance
for stable amplifier operation. Impedance information is normally printed on the
speaker basket or magnet.
4. Where will the amplifier be installed?
Consider both the length of your leads, and routing when determining the mounting
location. It is best to run power and RCA wiring on opposite sides of the vehicle to
prevent induced noise. Pre-amp input jacks require a length of high quality shielded
male to male RCA patch cord.
PLANNING YOUR SYSTEM ................................................................
WIRING CONNECTION ....................................................................
CONTROL FUNCTIONS .....................................................................
SPEAKER CONNECTION MONO CHANNEL ..................................
2 CHANNEL ............................................
4 CHANNEL ............................................
TROUBLE SHOOTING GUIDE ............................................................
SPECIFICATION .................................................................................
WARNING .........................................................................................
3
4
5, 6, 7
8, 9
10, 11
12, 13, 14
15
16, 17
18
TABLE OF CONTENTS
PLANNING YOUR SYSTEM

- 4 -
CONNECTING THE POWER (Fig.1)
CAUTION:
AS A PRECAUTION, DISCONNECT THE POWER WIRE FROM THE BATTERY WHILE MAKING THE
POWER AND GROUND CONNECTIONS TO THE AMPLIFIER.
4/8 GAUGE(Thicker if planning for additional Amplifiers) wire is recommended for
both the power and ground wires. 12 Gauge, for the remote turn-on wire. Both
types are available at most Mobile Audio Dealers or Installation Shop.
(1) Ground :To Vehicle Chassis
To avoid unwanted ignition noise caused by ground loop, it is essential that the
Amplifier be grounded to a clean, bare, metal surface of the vehicle's Chassis
NOTE :
GROUND WIRE SHOULD NOT BE EXTENDED MORE THAN 3 FT. (1 METER).
(2) +12 Volt(Fused) Constant Power:To Battery (+)
Due to the power requirements of the Amplifier, this connection should be made
directly to the positive (+) terminal of battery. For safety measures, install an in-line
Fuse Holder (not included) as close to the battery positive (+) terminal as
possible with an ampere rating; not to exceed total value of fuses in Amp.
(3) Remote Turn-On Input: To remote turn-on output of Car Stereo
This Amplifier is turned "ON" remotely when the vehicle's stereo is turned "ON".
NOTE :
IF YOUR RADIO DOES NOT HAVE A +12 VOLT OUTPUT LEAD WHEN THE RADIO IS TURNED ON, THE "REMOTE"
TERMINAL ON THE AMPLIFIER CAN BE CONNECTED TO VEHICLE'S ACCESSORY CIRCUIT THAT IS LIVE WHEN THE
KEY IS "ON".
FIG. 1

- 5 -
RCA input jacks
These RCA input jacks are for use with source units that
have RCA or Line level outputs. A source unit with a
minimum level of 200mV is required for proper operation.
The use of high quality twisted pair cables is
recommended to decrease the possibility of radiated
noise entering the system.
Auxiliary outputs
The Auxiliary outputs offer Power Acoustik amplifiers easy,
unlimited system expansion.
Route RCA's from the line out of the first amplifier to the line
input of a second amplifier when using a single source
output.
LEVEL Control
The level control will match the amplifiers sensitivity to the
source units signal voltage.
LFA2-420/LFA2-600/LFA4-840/LFA4-1200/LFA4-1600
LFA1-2000D/LFA1-4000D/LFA1-5500D : The Operating range
is 200mV minimum to 6V maximum.
LFA2-800/LFA2-1250/1800/2200/2600 : The Operating range
is 200mV minimum to 3V maximum.
CAUTION: Do not run the amplifier in high volume for long time,
otherwise the loudspeakers will be damaged.
Bass EQ / BASS BOOST
LFA2-420/LFA2-600/LFA4-840/LFA4-1200/LFA4-1600 : The
boost can be selected 0dB or 18dB.
LFA2-800/LFA2-1250/LFA2-1800/LFA2-2200/LFA2-2600 : The
boost can be adjusted between 0dB to 24dB.
LFA1-2000D/LFA1-4000D/LFA1-5500D : The boost can be
adjusted between 0dB to 18dB.
Full pass x-over switch
When the switch is in the "Full" position, full range signal is
passed.
HPF X-over switch
When the switch is in the "HPF" position, frequencies higher
than the high pass frequency setting are passed.
LPF X-over switch
When the switch is in the "LPF" position, frequencies lower
than the low pass frequency setting are passed.
CONTROLS

- 6 -
High pass x-over frequency control
This control is used to select the desired high pass x-over
frequency.
LFA2-420/LFA2-600/LFA4-840/LFA4-1200/LFA4-1600 : The
frequency can be adjusted between 40Hz and 250Hz.
LFA2-800/LFA2-1250/LFA2-1800/LFA2-2200/LFA2-2600 : The
frequency can be adjusted between 50Hz and 500Hz.
Low pass x-over frequency control
This control is used to select the desired low pass x-over
frequency.
LFA2-420/LFA2-600/LFA4-840/LFA4-1200/LFA4-1600 : The
frequency can be adjusted between 40Hz and 250Hz.
LFA2-800/LFA2-1250/LFA2-1800/LFA2-2200/LFA2-2600 : The
frequency can be adjusted between 30Hz and 500Hz.
LFA1-2000D/LFA1-4000D/LFA1-5500D : The frequency can
be adjusted between 40Hz and 200Hz.
SUBSONIC
LFA2-800/LFA2-1250/LFA2-1800/LFA2-2200/LFA2-2600 : The
frequency can be adjusted between 30Hz and 175Hz.
LFA1-2000D/LFA1-4000D/LFA1-5500D : The frequency can
be adjusted between 20Hz and 50Hz.
INPUT MODE
Selects 2, 3 or 4 channel operation(FIG. 2)
LFA4-840/1200/1600
!##%*)




!#>DC


"# "-
!%--$+'%
(($$()
!+!
 


*!!
!%%
!%% *!!
--$+'%#%*)"$!+!
"# "-
zz
zzzz
 
%$,'
['#]
%'$))
[']
CONTROLS
FIG. 2

- 7 -
LED
Will illuminate GREEN to indicate the amplifier is on and
operating normally, and will be illuminated RED if the
amplifier shuts down due to short circuit, DC offset, or
overheating detected by on board protection circuitry.
REMOTE
Controls the subwoofer amplifier gain, from a remote
location for ease of adjustment during listening.
Warning: Do not connect a level control knob from other
manufacturers to the Remote Sub Level Control of any amplifier.
Even though the connectors fit properly, the control knob and
connector pin positions may be different and the amplifier will be
damaged.
PHASE
0°or180° selectable for switching the phase of the output
to the woofer.
MASTER/SLAVE MODE[LFA1-2000D/4000D/5500D]
Controls whether the amplifier is a slave or master when
connected in combined amplifier configurations. (Refer to
the Master Mode section of this guide.)
All of the controls will be adjusted by the "Master"
amplifier.
-Slave mode : To be switched " Slave mode" when linking
one amplifier with another amplifier.
-Master mode : To be switched " Master mode" when only
using this single amplifier.
CONTROLS
REMOTE

- 8 -
MASTER MODE CONFIGURATION
LFA1-2000D / LFA1-4000D / LFA1-5500D
1.Lowest Recommended Impedance is 1ohm mono.
2.RCA Inputs are connected to both Left and Right channels
3.Gain controls to be set match input source
4.Line Output configured for stereo operation