Serious systems need serious power to show off their dynamic range, and Axiom is determined to provide you with just that: clean, pure power with lots of dynamic headroom. You'll experience more of the excitement of your system without clipping or distortion ever. All you'll hear are notes that go on and on with plenty of headroom.
Why Power Is Paramount
If you under-power speakers, when they reach a challenging passage your amplifier will go into what is known as clipping, creating distortion as it struggles to keep up with the signal. That distortion is what we typically mean when we say something sounds 'too loud' - the displeasing noise stands out for us and we want to turn the sound down.
But when you have enough power going to all channels of your system, you'll never hear distortion. All you'll hear is the thrill of the action taking place - dynamic explosions, rousing crescendos - and the true capabilities of your high-end audio system.
How To Get It
Getting enough power means understanding the numbers. It seems straightforward: look at the number of watts-per-channel and get the one with the biggest numbers, right? But that's not really how it works. Amp power can be a bit confusing to understand because there are a number of specifications that need to be looked at together to determine exactly how much power you have available for music and movie playback. The standard way power is measured for an amplifier is a steady tone at 1 kHz into a resistor at either 2 ohms, 4 ohms, or 8 ohms and to a maximum distortion of 1%. This gives some consistency for comparison purposes but does not give us the whole story we need to know to determine how much power we actually have available for the dynamic playback of music and movies. Unfortunately, it can also cause a race between companies to get the highest possible wattage number when measured this way at the expense of the more important number, which includes time and distortion, generally referred to as clean dynamic headroom. Since music and movie soundtracks are never playing a constant tone at one power level the important thing to know is what happens when the amplifier is asked to play a very loud dynamic peak for a fraction of a second over and over again. Power is logarithmic, meaning an amplifier must double its wattage output for every 3 dB more of output you want to have. So if we use 15 dB as a desired amount of headroom for music and movie playback you will need a lot of power available for brief moments to achieve this without having the amplifier go into clipping or shutdown:
Continuous Average Output:
3 dB of Dynamic Headroom:
6 dB of Dynamic Headroom:
9 dB of Dynamic Headroom:
12 dB of Dynamic Headroom:
15 dB of Dynamic Headroom:
This makes it very important to know what happens when the amplifier is asked to exceed its rated continuous output for a brief moment in time. If the amplifier has no ability to produce short bursts of power beyond its rated continuous power then you can look at this equation in reverse. Let’s say the amplifier has a rated continuous output of 400 watts with no headroom above this, which is typical of amplifiers that use switching power supplies:
15 dB peak:
12 dB peak:
9 dB peak:
6 dB peak:
3 dB peak:
Continuous Average Output:
If the amplifier is using a switching power supply with a max rated power equal to the continuous rated power of the amplifier, with one channel driven, and little or no capacitance storage you will be severely limited in your real output capabilities to all channels. Virtually all receivers are constructed this way. All Axiom power amplifiers use what is called a linear power supply. This combination of a toroidal transformer and lots of storage capacitance means you have usable power many times the continuous rated power and that means loud and clean listening for you.
The massive analog power supply partners with the Axiom Digital Amplifier to exceed 90% efficiency: compare that to the typical Class A/B design you find in most amplifiers that waste nearly half the output from the amplifier in heat! Think about the numbers: a typical wall plug is capable of producing 1800 watts on a regular 15 amp circuit. The Axiom Digital Amplifier is so efficient, you can easily achieve 1000 watts of total continuous output: approximately double what a Class A/B design can provide. Add to this the massive capacitance storage in all Axiom amplifiers and you have available clean dynamic power available to your system many times the Continuous RMS wattage rating.
Which Axiom Amplifier Is Best For Me?
For rooms under 2,500 cubic feet and normal sort of volume levels the 1000 series is perfect.
For rooms over 2,500 cubic feet or if you like to really crank it once and awhile then the 1250 series is the one.
For huge rooms and/or the desire to the nirvana of loud and clean the 1500 series is the answer.
Axiom amplifiers can be connected to either the pre-amp outputs on your receiver (check your receiver has these) or to a stand-alone pre-amp processor.
Axiom's ADA Series amplifiers bring more dynamic headroom - which means more detail, clarity, and realism - to your audio experience. You can never have too much power, and the ADA amplifier series is here to give you every last ounce of awesomeness out of your loudspeakers. What can you expect to hear when you've got enough power? No distortion, and no clipping. Hear what you've been missing.
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|Weight (lbs) each
|Weight (kg) each
|Dimensions H W D (inches)
|5.25" x 17.75" x 16.75"
|Dimensions H W D (mm)
|133 x 450 x 425
|Frequency Response (6 ohms -3dB)
|5Hz - 45kHz
|AC Input Voltage
|115 or 230
|RCA Input (Single Ended)
|Sensitivity (Full Power into 8 ohms)
|Signal to Noise Ratio (Input shorted, 22Hz-20kHz un-weighted, referenced to full power @8ohms)
|12 Volt Trigger
|XLR Input (Balanced)
|This item can be returned
|Continuous RMS Wattage per channel into 8 ohms
|Continuous RMS Wattage per channel into 4 ohms
|Continuous RMS Wattage available to all channels
|Dynamic Wattage available to all channels