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RSd AMPLIFIERS 

MONOBLOCK OWNER’S MANUAL

Phoenix Gold International, Inc. • 9300 North Decatur St. Portland, OR 97203 • 503.286.9300 • www.phoenixgold.com

INSTALLATION

Note: Verify that your vehicle does not have a positive ground electrical system, 
this is very rare.  A positive ground system is the reverse of most standard 
vehicles in that the + battery terminal is connected to the vehicle chassis and is 
typically found in some older European vehicles. If you have any questions do 
not proceed until you have verified this.  If it is a positive ground electrical system 
please contact your dealer for assistance. 

Caution: Please follow all the installation recommendations and instructions 
in this manual.  Installation in any manner not outlined in the manual will 
void your warranty and may possibly cause damage to the vehicle and/or 
the amplifier.

Warning: The battery ground should remain DISCONNECTED at all stages 
of installation.

LOCATION/MOUNTING

When selecting a location to mount your amplifier, please keep in mind that 
electronics are sensitive to vibration, moisture, and heat.  Make sure the amplifier 
is mounted in an area with ample ventilation and is not exposed to moisture or 
external heat.  For proper cooling, it is recommended to mount the amplifier 
horizontal or vertical but not upside-down.   Automobiles have a certain level 
of normal vibration and we have designed the product with this in mind, but 
excessive vibration may cause damage over time.  Using the amplifier for a 
template, mark the mounting holes in your selected area while following the 
preceding guidelines. Verify that you are not going to damage sensitive vehicle 
systems by drilling where you have selected (look for gas tank, wires, etc…). 
Remove the amplifier and pre-drill the locations for size screws/bolts that you 
have selected that fit the amplifier and your installation purposes, permanently 
mount the amplifier to selected location.

Figure 3. Typical System connection

Note: It is best to mount the amplifier to some form of insulating surface, such 
as MDF, so that the chassis of the amplifier does not come in contact with the 
vehicle chassis (if a single screw makes contact with both the amplifier and 
vehicle chassis, it is the same as no insulator).  This will lessen the possibility of 
any ground related noises and will shield minor amounts of radiated noises.
 

INPUT CONNECTIONS

Connect RCA input jacks of the Amplifier to the output of the Source Unit (i.e. 
Radio, Cassette player or CD player). 

SPEAKER CONNECTIONS

When connecting the Amplifier to the Speaker, use heavy gauge speaker cable
for these connections (14AWG recommended minimum).

We recommend that the minimum total impedance of the speaker load is no 
less than 2 ohm. The amplifier has 2 each (+) terminals and 2 each (-) terminals.  
These terminals are duplicates, meaning you can use any combination of + and 
– connections for a single speaker (Model 300.1 only).  Connect the positive 
(+) speaker output of the amplifier to the positive (+) terminal of the speaker.  
Connect the negative (-) speaker output of the amplifier to the negative (-) 
terminal of the speaker.  
 
Figure 4: Single Woofer Connection

CAUTION: ANY DEVIATION FROM THE ABOVE SPEAKER CONNECTION 
MAY CAUSE SERIOUS DAMAGE TO THE AMPLIFIER AND/OR SPEAKERS. 
PLEASE DOUBLE CHECK THE CONNECTION BEFORE TURNING THE 
SYSTEM ON.

Figure 3. Typical System Connection

Figure 4: Single Woofer Connection

Head Unit

Battery

Alternator

Fuse

Remote Lead

Head Unit

Subwoofer

Summary of Contents for RSD300.1

Page 1: ...lease read your warranty and retain your receipt and original carton for possible future use Great product and competent installations are only one piece of the puzzle when it comes to your system Make sure that your install is using only the best installation accessories Phoenix Gold manufactures everything from RCA cables and speaker wire to power ground cable and battery connectors With proper ...

Page 2: ...nty Any applicable implied warranties are limited in duration to the period of the express warranty as provided herein beginning with the date of the original purchase at retail and no warranties whether express or implied shall apply to this product thereafter Some states do not allow limitations on implied warranties therefore these exclusions may not apply to you This warranty gives you specific...

Page 3: ... temporarily shut down to allow for a cooling period As soon as the temperature returns to a safe level the amplifier will restart and resume normal operation This indicator also lights up when the amplifier detects either an over current situation shorted speaker outputs or a DC offset at the outputs Turn off the amplifier double check all inputs and speaker connections to make sure there is no shor...

Page 4: ... section titled INPUT SENSITIVITY ADJUSTMENT 5 SUBSONIC FILTER This is a filter to remove unwanted low frequencies that may cause damage to the speaker or are inaudible When this is used properly it will allow the amplifier to run more effectively 6 FREQUENCY SELECTOR FREQ Allows variable adjustment from 40 to 400Hz 7 VARIABLE BASS BOOST The bass boost will increase the output centered at 45Hz from ...

Page 5: ...EPERATELY This connection allows for connection of our remote voltage display optional so that you can monitor the applied voltage at the amplifier in real time 14 LEFT RIGHT SPEAKER OUTPUT TERMINAL Used to connect the amplifier to speakers The minimum suggested speaker wire size is 16 gauge for stereo mode and 14 gauge if the amplifier is going to be used in mono bridged operation 8 GROUND INPUT TER...

Page 6: ...to damage sensitive vehicle systems by drilling where you have selected look for gas tank wires etc Remove the amplifier and pre drill the locations for size screws bolts that you have selected that fit the amplifier and your installation purposes permanently mount the amplifier to selected location Figure 3 Typical System connection Note It is best to mount the amplifier to some form of insulating sur...

Page 7: ...use link within 18 inches of the positive post on the battery If possible do not run the power cable together with the audio cables as it could possibly cause radiated noise in your audio system It is recommended to run audio cables on one side of your car and power cables on the other Note The proper size primary fuse circuit breaker located within 18 inches of the battery may vary depending on y...

Page 8: ...r source unit s fader control Check the amplifier s Input Sensitivity Level Frequent automatic amplifier shut down This indicates that the amplifier is operating at a continually undesirable high internal temperature High operating temperature can be caused by inadequate ventilation Refer to the sub section titled LOCATION for better amplifier location High operating temperature can also be caused by ...

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