In conjunction with our theories of solid low impedance drive the EMP series of amplifiers have been designed to be located as close to the loudspeaker as possible. Not only does this reduce loudspeaker cable losses but it will minimise any EMI radiation or reception by the loudspeaker cabling systems.

The EMP 2.5K is designed to drive the Electromotive Laboratories Model 5 and Model 10 systems in large rooms. The EMP 2.5K has adequate power to drive all components to their maximum performance without any stresses, either thermal or signal related, upon the power pack.

The EMP 2.5K has a frequency response from DC to 50,000 Hz, well in excess of human hearing ability, and well in excess of loudspeaker driver technology in most sensible professional drive units. We deliberately have chosen to use components that specifically do not exceed 50,000Hz high frequency bandwidth for sensible technical reasons, principle among them potential problems with radio frequency signal reception, amplification, and emission. In a modern studio environment, many switched mode power supplies can operate in the 100kHz range and have significant harmonics below this, significant amounts of these signals can be filtered onto audio grounds and power line grounds. Poor power line grounds can have very substantial amounts of VHF energy that can be passed into audio equipment that is not adequately filtered, if this energy is subsequently amplified to the level of hundreds of watts by unprotected unfiltered amplification equipment, or other unfiltered audio systems it can result in loudspeaker cables acting as high power longwave transmitter antennae.

Excessive amounts of inaudible VHF (Longwave) signal, often highly distorted passing anywhere in an audio system can result in severe signal degradation, overload, and overheating events that can be seemingly inexplicable. Additionally, harmonics of distorted VHF signals can manifest themselves in audible bands.

For all these reasons we deem that 50,000Hz is way more than adequate for a high quality high-resolution power amplification system and the best compromise between clearly passing the highest audible signals and blocking unwanted inaudible signals. At the low frequency limit, we have chosen to direct couple our amplifiers for optimum infrasonic performance when used with infrasonic capable monitoring systems. All amplifiers carry output DC monitoring circuits and are DC protected to prevent loudspeaker damage. This means the user must take care to avoid DC offset in poor D to A converters or the EMP 2.5K can enter protect mode without warning.

The EMP 2.5K was designed as a no-compromise wide bandwidth high power high resolution critical monitoring system power amplifier for use in the most critical of situations.

The EMP 2.5K is designed for use with an external control panel that is normally mounted in the front baffle of Model 5 and Model 10 series loudspeakers.

Optionally this remote panel may be located elsewhere when specified as part of a custom system, examples are mounted in front monitor walls, desktop enclosures, or in custom mixing console panels.

The remote panel features separate low and high amplifier enable switches, power indicators for both channels, and clip and fault indicators.

The Electromotive Laboratories EMP is a part of the Electromotive Infrasound range of infrasonic loudspeakers

When used in the correct acoustic environment program material in the infrasonic range is clearly reproduced.