BOSS Audio MR1000 1000-watts Full Range Class A/B 4 Channel 2-8 Ohm Stable Amplifier with Remote Subwoofer Level Control
MOSFET PMW POWER SUPPLY
Metal–Oxide–Semiconductor Field-Effect Transistor is a transistor used for amplifying or switching electronic signals. We use it in billions of them. 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. 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. (PMW) Pulse Width Modulation is a really clever way of controlling the amount power any certain device receives by switching from on to off extremely fast. It comes in handy in the case of the MR1000 amplifier. We want to use all of the power that is available without creating heat caused by resistance. Basically, the power flow is regulated so that it meets the exact specifications of the application that it is being used for.
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. Class ‘A’ and class ‘B’. 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’.
PC Board Coating
Since the MR1000 is near the water a lot of the time, the PC board is exclusively coated to protect it from the damaging effects of corrosion that humidity and the salty air can bring on over time.
Variable Low-Pass Crossover
Subwoofers reproduce sound based on a number of different 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 MR1000 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 for the bass frequency reproduction.
General Features
- Bridgeable outputs
- Trimode capable
- 2 Ohm Stable Stereo Operation With Output Power Increase
- Thermal, Overload and Speaker Short Protection
- Soft Turn-On Circuit
- Remote Turn On / Turn Off circuit
- Variable gain control
- LED Power and Protection Indicators
- Silver heatsink
- Remote subwoofer level control
Fixed High-Pass Crossover
Speakers also reproduce sound based on high, low or mid-range frequencies. High pass crossovers are geared specifically towards “highs” such as all size speakers, mid ranges and tweeters. Unlike the “Variable Low-Pass Crossover” mentioned above, you are not able to set exact sound specifications such as the bass, mid-range and high frequency reproduction. This High-Pass Crossover is fixed.
Specifications
- RMS power (4 Ohm): 100W X 4
- MAX power (2 Ohm): 250W x 4
- Bridged power (4 Ohm): 500W x 2
- Minimum speaker impedance: 2 O stereo / 4 O Mono bridged
- THD + N: 0.01%
- Frequency response: 6HZ – 50KHz
- Signal to noise ratio: 102 dB
- Channel separation: 90 dB
- Damping factor: 125+
- Crossover range: Low pass – 40Hz-150Hz / High pass – 200Hz (fixed)
- Bass boost: 0 - +18 dB
- Fuse rating: 40A x 1
- Dimensions: 12-3/4” L x 7-3/8” W x 2-1/4” H
Variable Bass Boost
So you have Bass Boost and Variable Bass Boost. The difference between the two is that with Bass Boost you either have extra bass or you don’t. But with Variable Bass Boost you have the control of exactly how much bass you want to pump out to your subwoofer(s). And this is what you get with the MR1000 Amplifier - Variable Bass Boost.
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The [TITLE] Details
- Amazon Sales Rank: #19166 in Car Audio or Theater
- Size: 16.00in. x 10.00in. x 4.50in.
- Color: Silver, White
- Brand: BOSS Audio
- Model: MR1000
- Format: CD-ROM
- Number of items: 1
- Dimensions: 2.25" h x 7.32" w x 12.72" l, 7.30 pounds
- CPU: AMD Athlon 1 GHz
- Memory: 128000MB DRAM
- Hard Disk: 1GB
- Graphics: This is the description of the PC Graphics 256MB
- Processors: 1
- Native resolution: 640x480
- Display size: 669.2913385827
Features
- MOSFET power supply
- Bridgeable
- Tri-mode operation
- Speaker level inputs
- Variable gain control
- Max Power, 2 Ohm - 250W X 4
- Rms Power, 4 Ohm - 100W X 4
- Max Bridged Power, 4 Ohm - 500W X 2
- Signal-To-Noise Ratio >102 Db
- Dimensions: 12-3/4"L
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