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  • BOSS Audio PH4.500 Phantom 2000-watts Full Range Class A/B 4 Channel 2-8 Ohm Stable Amplifier with Remote Subwoofer Level Control
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BOSS Audio PH4.500 Phantom 2000-watts Full Range Class A/B 4 Channel 2-8 Ohm Stable Amplifier with Remote Subwoofer Level Control


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2000-watt

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4 offers from $150.00
  • Four-channel Phantom amplifier with MOSFET power supply and trimode operation
  • Delivers 500 Watts x 4 at 2 ohms; 200 Watts x 2 at 4 ohms; 1000 Watts x 2 bridged
  • Line and speaker level inputs with variable gain control
  • Built-in low- and high-pass variable crossovers; 18dB bass boost
  • Includes remote subwoofer level control
  • Amplifier Class: Class A/B
  • Technology: MOSFET
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1 used from $125.99

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Style: 2000-watt
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Product Information

Style: 2000-watt
Technical Details
Item Weight12 pounds
Product Dimensions15.5 x 2.2 x 9.5 inches
Item model numberPH4.500
Chassis SizePlease fill in Unit Size
Preamp Outputs4
WarrantySIX YEARS
Weight12.3 Pounds
  
Additional Information
ASINB0032FOKW4
Best Sellers Rank #87,715 in Electronics (See top 100)
Shipping Weight14 pounds
ShippingThis item is also available for shipping to select countries outside the U.S.
Date First AvailableJanuary 7, 2010
  
Warranty & Support
Warranty, Parts: Parts

Product Warranty: For warranty information about this product, please click here
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Product Description

Style: 2000-watt

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

Customer Questions & Answers

Customer Reviews

A very good amplifier, by it!!
Atle
I took it to a professional installer who recommended I return it.
Huy D. Nguyen
This amp works better than i thought..
Michael

Most Helpful Customer Reviews

6 of 6 people found the following review helpful By Dave on November 10, 2011
Style Name: 2000-watt Verified Purchase
this is the 4th one of these I've bought i think lol and for the money its great i have spent over a 1000 dollars for amps that have to same power as these if you looking to get a really good amp for the price get this amp!!!!
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5 of 5 people found the following review helpful By Michael on February 22, 2011
Style Name: 2000-watt Verified Purchase
This amp works better than i thought.. i conected 2 500W RMS and 2 100 RMS midbass drivers and works great! a little hot but no big deal..
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4 of 5 people found the following review helpful By Stiflock on May 27, 2012
Style Name: 2000-watt Verified Purchase
Bought this back in April of this year. It arrived on time and was in good condition.

Hooked it up a few days after i received it at first i was not impressed by the amp as i was using it to play 2 bullet tweeters and a 10" Eminence mid-range speaker. The 2 tweeters hooked up to one channel and the 10" to another. The volume was low only other thing i had connected was a Clarion EQS746 equalizer. I was disappointed with the volume everything was hooked up @ 4ohms so i should be getting 200 rms through each channel lol i doubt that. After feeling defeated i connected it through my crossover and it got a real good boost.

I say its a excellent amp because at the end of the day after hooking it up through the crossover it seems to realize its potential while not playing 200rms @ 4ohms its absolutely hits and leave my ears ringing with proper tuning.

The amp gets hot fast and stays there no matter how low or long i play, it gets hot. But i have yet to see it go into protection mode or even blink. At this point its not under any pressure because its just playing the above mentioned i have another set of speakers same as the others but i yet to install them.

I have big plans for the amp i hope it doesnt disappoint!

For the price i recommend this amp to anyone who seeks a decent playing amp.
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3 of 4 people found the following review helpful By Big Stroze on March 29, 2011
Style Name: 1600-watt Verified Purchase
I have been building quality sound systems for years and decided to try two of these amps for my application because of clearance reasons. I own a 4-door truck with very little space to work with and these amps were about the right dimensions for my installation. They come with a separate bass controller that does not work too well. I truly couldn't tell the different with it connected or disconnected. I have one amp driving two high-power subs, and another driving my interior speakers, all through an equalizer. The sound is extremely clear and the bass is very responsive. One of the best features with this amp is the cable cover. You can high all of your cabling and slide your amps together to make them look like one large amp. The wire covers are removeable for easy access, but the plastic frame is a bit flemsy. My sub amp is bridged and the full range amp is not. Based on the location of the amps, there is not a lot of air circulation, but these amps have not gotten hot once. Then again, the gain levels are nominal and the subs are running at 8 ohms per. I think Boss has truly stepped their game up on this one and created a monster. Very nice amp to have at this price.
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1 of 1 people found the following review helpful By Ray c on November 29, 2013
Style Name: 2400-watt Verified Purchase
this amp has good power. you will notice it more when you upgrade factory speakers it you haven't alreadydone so.
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1 of 1 people found the following review helpful By Kunal on November 1, 2013
Style Name: 2400-watt Verified Purchase
Bought it over a year ago.... still working,, crisp sound quality to drive 4 pioneer speakers. Worth the price i paid for.
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1 of 1 people found the following review helpful By Cody love on October 17, 2013
Style Name: 2400-watt Verified Purchase
Great does what its supposed to do. Sounds great. Exactly what I wanted. Easy install. Doesnt cut out or anything
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3 of 4 people found the following review helpful By jean carlo noguera on March 15, 2012
Style Name: 1600-watt Verified Purchase
LA MONTE EN MI CARRO, Y AYUDA MUCHISIMO AL SONIDO DEL MISMO, ES MUY CONFIABLE Y REALMENTE SUMAMENTE POTENTE, CUATRO CANALES PARA COLOCAR MUCHAS CORNETAS Y BAJOS, LA RECOMIENDO 100 %, EXCELENTE PRODUCTO.
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