Boss Audio R1100M – 1100 Watt, Monoblock, Class A/B, MOSFET Amplifier With Remote Subwoofer Level Control

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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 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’.

MOSFET Power Supply

Metal–Oxide–Semiconductor 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

  • Two ohm stable stereo operation with output power increase
  • Thermal, overload, and speaker short protection
  • Soft turn-on circuit
  • Remote turn on / turn off circuit
  • LED power and protection indicators
  • Black anodized heatsink
  • Nickel plated low level and high level inputs

What Comes In The Box?

  • Remote subwoofer level control
  • High input cable with connector
  • Instruction manual
  • Mounting screws

Low And High Level Inputs
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Low And High Level Inputs

You can get a signal into RIOT 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.

Variable Bass Boost
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Variable Bass Boost

With the R1100M amplifier you have Variable Bass Boost, which gives you control of exactly how much bass you want to pump out to your subwoofer(s).

Variable Crossover
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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 R1100M amplifier, a variable crossover is offered so that you, the listener, have the ability to set the frequency at which the crossover occurs, thereby setting precise sound specifications on your subwoofer.

Product Features

  • MOSFET Monoblock Power Amplifier
  • Remote Subwoofer Level Control Included
  • Blue Illuminated BOSS Logo
  • Max Power @ 2 Ohms: 1100 Watts
  • RMS Power @ 4 Ohms: 250 Watts

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3 Responses to Boss Audio R1100M – 1100 Watt, Monoblock, Class A/B, MOSFET Amplifier With Remote Subwoofer Level Control

  1. Nicholas J. Rose says:

    Optimistic power claims I’m an electronics engineer so I care about specifications. This amplifier is a low cost item which offers reasonable value, but I wish they would be more honest with their claims.My measurements show 21.5V rms continuous into 4 ohms at the onset of clipping with a 14.12V supply. This is 115W rms.With no load it gives 23.9V with 14.12V supply. This corresponds to 142W rms peak.So, essentially it is a 100-150W amp (4 ohms), or at best 200-300W (probably less) into 2…

  2. Ron M says:

    The Real Deal Sorry folks…But there are a couple of myths, being two pieces of (…dare I say it?) outright misinformation that have become attached to this compact masterpiece, …even though I’m sure both of them were offered with the best of intentions.As for me, I thought I’d wait until I’d driven it hard and bounced it around the Aussie Outback for a couple of months before any attempt at reviewing it.A little background: I’m an Audio Director/Sound Supervisor in my…

  3. big boy toys says:

    what i wanted this amp works great for what I needed. I have a 200w RMS RE Audio RFX 10″ sub and I wanted this to complement my stock sound system. I was looking for an amp with the “high level” inputs. so i could run speaker wire from my radio straight to my amp without a line level converter. you will get better sound this way by losing less signal. you must use well shielded pure copper speaker wire, because its easier to pick up interference this way. I have not had any…