Flexible Amplifier Summing Technology (FAST)

PLD & CXD Training : FAST Innovation

1 ) Introduction

2m 15s

2 ) An Inside Look

3m 12s

3 ) Product Pillars Introduction

3m 30s

4 ) FAST Innovation

2m 50s

5 ) Front Panel Navigation

3m 2s

6 ) Inputs/Outputs & EQ Processing

4m 7s

7 ) Preset Wizard & Speaker Wizard

4m 21s

8 ) Amplifier Navigator Software

3m 4s

9 ) Assessment

Helpful Tips and Definitions

Flexible Amplifier Summing Technology (FAST) 2m 50s
  • FAST or Flexible Amplifier Summing Technology enables the user to configure 4, 3, 2 and single Channel Amplifier Configurations.

  • All Amplifiers are limited by two primary factors; Current and Voltage. Understanding this means that FAST allows any combination of 4 Channels to be summed and run in parallel mode.

  • By running 2 Channels in parallel mode these Amplifiers allows the greatest amount of utilization for higher power at low impedences. Doing this provides a signifacntly larger amount of power while still maintaining low wattage.

  • These Amplifiers especially excel when multi-channel configuration is bridged with another multi-channel configuration running in parallel. This opens up a huge amount of power in the 4-8 OmH region where most loudspeakers reside.

Video Transcript

Flexible Amplifier Summing Technology (FAST) 2m 50s
Hi. My name is Dale Sandburg and I'm the product manager for the new PLD and CXD amplifiers from QSC.
Today I'm going to show you the power-handling technology that makes these amplifiers so incredibly versatile, efficient, and unique.
It's called Flexible Amplifier Summing Technology, or FAST.
This patent-pending feature enables you to configure the amplifier using four, three, two, and single channel amplifier configurations, making this the most flexible amp QSC has ever created.
Let me show you how it works. All amplifiers are limited by two factors: current and voltage.
The vertical axis on this graph represents the amount of power than can be delivered at varying levels of loudspeaker impedance, seen on the horizontal axis.
This defines the deliverable power to a single audio channel.
Typical amplifiers allow the user to bridge an incoming signal across two channels.
This gets more power into higher-impedance loudspeakers.
You can think of these audio channels as garden hoses.
In order to increase the water coming out, you can increase the water pressure.
This is what bridge mode does.
But this bridging operation isn't very helpful to loudspeakers running at lower impedances.
FAST technology takes this idea to the next level.
First of all, FAST allows for any combination of four channels to be summed and run in parallel mode.
When two channels are run in parallel mode, they provide far better utilization of the current for higher power at low impedances.
In the garden hose analogy, parallel mode is like adding an additional water hose of the same pressure.
The total volume of water is doubled, or tripled, or even quadrupled.
You can see that running three or four channels in parallel provides significantly more power to loudspeakers with lower impedances, like multiple subwoofers connected together.
But where this Flexible Amplifier Summing Technology really shines is taking two channels in parallel and bridging them with another two channels in parallel,
opening up a huge amount of power in the 4-8 ohm region, where most loudspeakers reside.
Remember, the amount of deliverable power in this region will also be limited by the power supply of the amplifier.
It's easy to see that PLD and CXD amplifiers from QSC offer significantly more usable power than any other amplifier on the market.
And remember, we still offer single and bridge mode in addition to parallel and parallel-bridge modes.
If you're not sure which combination of channels is the best for your application, don't worry.
The onboard Configuration Wizard can analyze your loudspeaker arrangement and recommend the best setup for your particular application.
Thanks for watching.

Downloads and Links

Flexible Amplifier Summing Technology (FAST) 2m 50s