EarthQuake XJ-700R Bedienungsanleitung

Earthquake Europe

Mogensensvej 29, 5000 Odense C

Email: support@earthquakesound.dk

Tlf.: +45 2043 8007

Website: www.earthquakesound.eu / www.earthquakesound.dk

Customer Support

support@earthquakesound.dk

Tel:+45 2043 8007

Earthquake Europe

Mogensensvej 29

5000 Odense C

Tel:+45 2043 8007

Product Registration

This XJ-700R Power Amp can be registered by returning the Product Registration

card attached to this manual. Please also retain the sales receipt which represents

proof of purchase and helps expedite warranty issues.

www.earthquakesound.eu / www.earthquakesound.dk

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Introduction

The revolutionary aspect of Class J is its ability to combine ultra high efficiency of 99% with extraordinary bass control. Class J

is an evolution on PWM (Class D) technology that combines advanced multi-level digital feedback with an intelligent controller.

It modulates the supply voltage and output switching frequency in real time based on the frequency and amplitude content of

the input signal. This added level of intelligence offers several advantages such as increased thermal headroom, dramatically

improved bass response and dynamic power capabilities.

The patented Class J output stage ensures stellar audio quality and takes the

concept of the “intelligent circuit” a step further by actually adapting the electri-

cal operation of the output stage to the signal it is playing. This can rightly be

considered a quantum leap in amplifier technology.

Fig.1 Diagram of the Class J Principle

VE-TAT (Velocity Enhancing Transistor Augmentative Technology ) is an

enhanced transistor dead-time controller. Where Class J is an intelligence

infused output topology, VE-TAT works at the component level. A critical area

for efficiency in a PWM (switching output) amplifier is the speed and precision

by which the transistors can be opened and closed. VE-TAT dramatically

increases transistor velocity thus eliminating dead-time losses and increasing

efficiency.

Thank you for purchasing this XJ-700R LFE Mono Block Class J Amplifier. Designed to exceed all of your expectations for audio

amplification, the XJ-700R is a ruggedly constructed high quality profesional amplifier equally suited for home or professional

use. It is ideal for heavy duty sub-woofer application, powerhouse for multiple tactile transducers, and a variety of other home

and studio applications.

TheThe XJ-700R is a high power mono block subwoofer amplifier ideal for powering large subwoofers or tactile transducers.

Featuring advanced Class J output technology, VE-TAT acceleration and MARS protection - all in a cool running fan free 1U

package. Sporting 700/400 WRMS into 4/8 ohm, the XJ700R is ready to power your low frequency needs. The XJ-700R has

optimized presets for movie/ music listening, a digital volume readout with rotary dial and remote control.

Features include : variable low pass filter, phase inversion and precalculated boundary EQ.

www.earthquakesound.eu / www.earthquakesound.dk

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Overbuild power supply

The patented technologies combined with a dramatically oversized power supply make the XJ700R amplifier capable of

delivering raw quantities of continuous power. The power supply is based on a rigid silicon-steel, hard-wound Pancake low

regulation 1200VA toroidal transformer. The large and heavy transformer ensures a stable supply without voltage drop even at

severe and continuous operation.

MARS does not use any relays or other damping-factor reducing mechanical switches that can wear out or fail over time.

Instead, a specially designed circuit instantly shuts off the output drive.

In the event a short-circuit activates the MARS protection system, it continuously re-scans the output every 10 seconds. Normal

operation automatically resumes as soon as the short-circuit condition is removed.

MARS (Magnetically Actuated Reanimation System) is a new type of protection

system that enables the use of all amplifier power resources without

compromising the survivability of the amplifier under catastrophic conditions.

TTypical protection systems rely on fuses or relays that complicate the signal

path thus degrading audio quality. MARS is different as it is not in the signal

path, but works by sensing the electromagnetic field of the conducting wires.

The internal communication of MARS transmits in the optical plane with a

speed more than 1500 times that of the fastest signal passed through the

amplifier.

www.earthquakesound.eu / www.earthquakesound.dk

Introduction

page 4

Earthquake Sound Corporation , an engineering driven

company, lead for over 26 years the field of audio innova-

tions. A plethora of audio patents is proof that we con-

stantly stay at the cutting edge of technology.

Leading the way means that we can not take the “easy

route” of using off the shelf hybrid chips: generic “me too”

solutions or other compromises. We blazed the trail with

real innovations and real technology invented right here

in the USA, by hardworking and dedicated engineers.

I hope that you will enjoy this amplfier , we worked hard to

perfect it. We will value any feedback you might have on

its performance and design.

Thank you for choosing Earthquake.

From our hands to your ears...From our hands to your ears... Thank you.

First of all, thank you for purchasing this XJ-700R

subwoofer power amplifier.

Earthquake’s XJ-700R is a high power mono block

subwoofer amplifier suited for both professional and

home use, ideally for powering large subwoofers or tactile

transducers.

TheThe amazing force of the XJ-700R comes from its

advanced Class J output technology, VE-TAT

acceleration and MARS protection - all in a cool running

fan free 1U package. Sporting 700/400 WRMS into 4/8

ohm, the XJ-700R is ready to power your low frequency

needs.

TheThe XJ-700R has optimized presets for movie/ music

listening, a digital volume readout with rotary dial and

remote control. Other features include: variable low pass

filter, phase inversion and precalculated boundary EQ.

TheThe multi-patented “XJ” power amplifier series employs

some of the most advanced GREEN technologies ever

made, managing to deliver more sound while using less

power. Right off the get go, you can also see that the XJ

amplifiers are light, small and have no noisy fans.

It converts with record efficiency power from the “wall

outlet” to “music in your ears”.

It is simply put the perfect amplifieIt is simply put the perfect amplifier, whether you are an

advanced user or a novice in need of a compact but

efficient and powerful amplifier.

www.earthquakesound.eu / www.earthquakesound.dk

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page 9

Features & Specifications

1 x 1000 Watt IHF (4-Ohms Mono)

1 x 600 Watt IHF (8-Ohms Mono)

1 x 700 WRMS (4-Ohms Mono)

1 x 400 WRMS (8-Ohms Mono)

POWER OUTPUT

18Hz - 160Hz

FREQUENCY RESPONSE

<0.02%

TOTAL HARMONIC DISTORTION

50 volts / microsecond

SLEW RATE

>112dB (balanced) 108dB (unbalanced) @ rated power

SIGNAL TO NOISE RATIO

4 Ohms or greater

LOAD IMPEDANCE

>1500

DAMPING FACTOR

RCA

INPUT CONNECTIONS

Binding posts

OUTPUT CONNECTIONS

110 - 120 VAC ~/60Hz

220V-240v ~/50Hz

POWER REQUIREMENTS

H=1-3/4” / 44.45mm (2”/ 50mm including feet) x W= 17” / 432mm (19”/

483mm including ears) x D= 10-1/2” / 267mm (11-1/4” / 286mm including

speaker connection)

SIZE AND WEIGHT

RACK MOUNT SPACE

-RCA Inputs

-Remote Control

-Boundary Equalizer

-Variable 24db low pass crossover 40-160HZ

-Auto-ON by signal sense function

-Black Finish

-Auxiliary IR control via 1/8” Mono mini-jack. -Auxiliary IR control via 1/8” Mono mini-jack.

(Allows the amplifier to be remote controlled even if it is placed in a different location.)

-Music or Movie preset mode

www.earthquakesound.eu / www.earthquakesound.dk

page 10

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