Consumer Reviews BOSS Audio Systems PH4.500 Phantom 2000-Watts Full Range Class AB 4 Channel 2-8 Ohm Stable Amplifier with Remote Subwoofer Level Control
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| Item Dimensions LxWxH | 15.5 x 2.25 x 9.5 inches |
| Manufacturer | Boss Audio Systems, Inc. |
| Brand | BOSS Audio Systems |
| Number of Channels | 4 |
- Amplifier Class: Class A/B
- Technology: MOSFET
- Number of Output Channels: 4
- Total Power: 2000 Watts
- Max Bridged Power @ 4 Ohms: 1000 Watts x 2
- Max Power @ 2 Ohms: 500 Watts x 4
- RMS Power @ 4 Ohms: 200 Watts x 4
Product Description
MOSFET Power Supply
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.
General Features
- 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
- Black anodized heatsink
- LED power and protection indicators
What Comes in the Box?
- Remote Subwoofer Level Control
- High input cable with connector
- Instruction Manual
- Mounting Screws
Full Range, 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 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 PH4.500 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.
Variable Crossover
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 PH4.500 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 specific sound specifications such as the bass, mid-range, and high frequency reproduction.
4/3/2 Channel
This feature comes in handy for a few different installation applications and is very versatile. The “4” channel allows you to use the PH4.500 as a 4 channel amplifier by hooking up 4 speakers to it: Fronts and rears. The “3” channel is slightly different. It allows you to hook up 2 speakers to channels 1+2 and use the remaining 3+4 channels for 1 subwoofer in bridged mode. And lastly, the functionality of the “2” channel allows channels 1+2 to be bridged to accommodate one speaker OR one subwoofer. Channels 3+4 can be used in the exact same application.
Variable Bass Boost
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 PH4.500 Amplifier.
Low and High Level Inputs
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!
Gold-plated RCA low level and high level inputs
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