View larger Class A/B Topology A class A/B amplifier uses two groups of transistors and it is generally considered to be the best compromise of the two classes 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 thats 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. MOSFET Power Supply MetalOxideSemiconductor Field-Effect Transistor is a transistor used for amplifying or switching electronic signals. We use it in computers, telephones, game consoles, cars, electrical appliances, and in 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. 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. General Features What Comes In The Box?

Low And High Level Inputs

View larger Low And High Level Inputs You can get a signal into Phantom series amplifiers two different ways - Low level and 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 measure in wattages. It comes in the form one positive and one negative wire from the back of your receiver to and goes to the input terminal of your amplifier in the same wire form. Low-level (RCA) input wiring is preferred for best audio performance. Always use a high-quality RCA cable for best audio performance. Note: Do not connect both the high level and low level inputs from your receiver to your amplifier at the same time. Full Range Monoblock

View larger Full Range Monoblock With a Full Range Monoblock amplifier you not only have the option to run your subwoofers, but also your speakers. By just a flip of a switch from Low to Full, the PH1500M will change from only offering a low to a complete range of frequencies that you need to be able to listen to your 2, 3, 4, or 5 way speakers. Variable Crossover

View larger Variable Crossover Subwoofers reproduce sound based low 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 PH1500M amplifier, a variable crossover is offered so that you, the listener, can have the ability to set the frequency at which the crossover occurs, thereby setting precise sound specifications on your subwoofer. Variable Bass Boost

View larger Variable Bass Boost The difference Bass Boost and Variable Bass Boost is that with Bass Boost you either have extra bass or you dont. 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 PH1500M Amplifier.