New for 2010, Boss Audio's Phantom power amplifiers cover a wide variety of applications. Four- and two-channel full-range models will match perfectly with your speaker system. MOSFET amplifiers deliver plenty of power, while bass boost and built-in high- and low-pass crossovers allow you to customize your cabin acoustics to your taste. The PH2.500 is a two-channel MOSFET amplifier delivering 1000 watts peak power bridged.
Phantom amps include a remote subwoofer level control.
This allows you to send your signal to a tri-way crossover for adding a subwoofer to a two-channel amp.
Remote Subwoofer Level Control
Phantom amps include a remote subwoofer level control for easy level adjustments.
Line/Speaker Level Inputs
Separate line and speaker level inputs mean the amplifier can handle high-level signals from receivers lacking RCA outputs.
This amplifier features variable high- and low-pass crossovers, so you can adjust the sound to suit whatever speakers you're driving.
Variable Gain Control
Allows you to match the input gain to your receiver for better sound with less distortion.
MOSFET Power Supply
For high performance with low heat.
Add a little extra low-end power with 0 to +18dB of variable bass boost.
Power and Protection LEDs
Protection LEDs let you know when there's a problem.
What's in the Box
Boss PH2.500 Amplifier, Subwoofer Level Control, User's Manual
Metal–Oxide–Semiconductor Field-Effect Transistor is a transistor used for amplifying or switching electronic signals. We use it in our computers, our telephones, game consoles, cars, electrical appliances, and in this case, our Amplifiers. They are found in systems where information is processed or stored. A MOSFET is basically an electrical switch that allows the flow of electrical current. An electrical switch has two possible states, ON or OFF. This is where the MOSFET performs its most important role in our D Class amplifiers by allowing or preventing the flow of power and creating an efficient amplifier.
- Bridgeable outputs
- Tri-Mode capable
- 2 Ohm stable stereo operation with output power increase
- Thermal and speaker short protection
- Soft Turn-On Circuit
- Remote turn-on/turn-off circuit
- LED power and protection indicators
- Black anodized heatsink
- Remote Subwoofer Level Control
- High input cable with connector
- Instruction Manual
- Mounting Screws
A class A/B amplifier uses two groups of transistors and it is generally considered to be the best compromise of the class 'A' and class 'B' put together. A pure class ‘A’ amplifier typically has an enormous amount of current flowing through its output transistors with no audio signal. A pure class ‘B’ amplifier has no current flowing through its outputs with no audio signal. This eliminates virtually all of the crossover distortion that’s possible with class ‘B’ amplifiers. A class A/B amplifier is much more efficient than a class ‘A’ but without the possible distortion of a class ‘B’. As if that wasn’t enough, with a Full Range amplifier you not only have the option to run your speakers, but also your subwoofers. By just a flip of a switch from Full to Low, the PH2.500 will change from offering a complete range of frequencies that you need to be able to listen to your 2/3/4 or 5 way speakers to the “Low” that you need for a subwoofer application.
Speakers reproduce sound based on high, low, or mid-range frequencies. This process is called the crossover effect and occurs because the vast majority of audio systems cannot cover the entire spectrum sufficiently to minimize sound distortion and maintain an appropriate frequency ratio. In the case of our PH2.500 amplifier, a variable crossover is offered so that you can have the ability to set the frequency at which the crossover occurs, thereby setting sound specifications such as the bass, mid-range, and high frequency reproduction.
This feature works for a couple of different installation applications and is multi versatile. The “2” channel allows you to simply use the PH2.500 as a 2 channel amplifier by hooking up 2 speakers to it. The “1” channel is slightly different in that you can hook up 1 subwoofer in bridged mode.
The difference Bass Boost and Variable Bass Boost is that with Bass Boost you either have extra bass or you don’t. But with Variable Bass Boost you have control of exactly how much BASS you want to pump out to your subwoofer(s). You get Variable Bass Boost with the CXXM2200 Amplifier.
The Phantom series amplifiers have two different ways to get a signal into it. One way is called Low level input and the other is called High level input. A low level input is measured in voltages. It comes in the form of RCA outputs from the back of your receiver and goes to the RCA inputs on your amplifier. A High level input is measured in wattages. It comes in the form of one positive and one negative wire from the back of your receiver to the input terminal of your amplifier with the same wire. Low-level (RCA) input wiring is preferred for best audio performance. Always use a high-quality RCA cable for best audio performance. WARNING: Do not connect BOTH the high level and low level inputs from your receiver to your amplifier at the same time!