About 2 Ohm Operation; Features - Boss Audio Systems PH1500M User Manual

Features

Your new PHANTOM amplifier features
the following:
• Class A-B operation
• Bridgeable outputs
(except PH1500M and PH2500M)
• Tri-Mode capable
(except PH1500M and PH2500M)
• MOSFET PWM (Pulse Width
Modulated) Power Supply
• 2 Ohm stable stereo operation
with output power increase
• Thermal and speaker short
protection
• Soft turn-on circuit
• Remote turn-on/turn-off circuit
• Variable input gain control
• Variable low pass crossover(s)
• Fixed high pass crossover(s)
• Variable 0 to +18dB Bass Boost
• Gold-plated RCA low level and
high level inputs
• LED power and protection
indicators
• Black anodized heatsink
• Remote subwoofer level control

About 2 Ohm operation

Your PHANTOM amplifier has been
designed to operate efficiently at loads
down to 2 Ohms. This means that you
can install four 8 Ohm speakers per
channel, when using parallel wiring.
Increasing the number of woofers per
channel at low frequencies (below
100Hz) produces an acoustic coupling
effect. This acoustic coupling effect
increases your power output by about
3dB per speaker, or the equivalent of
an additional 10W per speaker.
When operating at 2 Ohms, the
amplifiers will increase their output
power by approximately 50%. The
current draw will also increase by
about the same amount, so be sure
you have enough current to run the
amplifiers into a 2 Ohm load.
If you lack adequate current, your
music reproduction will be distorted.
PHANTOM MOSFET Amplifier User's Manual - page 3