Ecler HZA4-70F User Manual

Page 4

1. IMPORTANT REMARK

Congratulations! You are the owner of a carefully designed and manufactured equipment. We

thank you for having purchased our HZA4-70F power amplifier.

It is VERY IMPORTANT that you read this manual before connecting the amplifier in order to

obtain its maximum performance.

We recommend our authorised Technical Services whenever any maintenance task should be

needed so that optimum operation shall be achieved.

2. INTRODUCTION

The HZA4-70F is a four-channel power amplifier with high impedance (100V line) directly

amplified outputs. Its main features are:

 Internal structure with four separate mono amplifiers, for 4 different mono input signals.
 The

FLEXIPOWER technology can be used to link 2, 3 or 4 adjacent channels, adding their

individual power, while operating as a single amplifier channel with a total power equivalent to the
sum of the channels.

 Independent volume adjustment (per channel) through front panel controls.
 Independent (per channel) 0-10 VDC remote volume control, via screw terminals on rear panel.
 SPM 100 Technology - Channel N for direct high impedance amplification (100V line) without

output transformers, which has the following benefits compared to traditional 100V line
amplification with transformers:

o Better frequency response in the low band of the audible spectrum (low frequencies or

bass) because there is no degradation of this part of the spectrum usually due to the
saturation of transformers core.

o Great

efficiency.

o Reduced

weight.

 Convection cooling, without fan, with the following benefits:

o No background noise.
o Increased

reliability.

 “Auto-standby” function: the amplifier automatically switches to standby mode (low consumption

mode) when it remains approximately two minutes without detecting any input signal, then
immediately switches back to normal operating mode when an input signal is re-detected.

 Thermal

protection.

 Overload

protection.

 “Anticlip” system to protect from saturation due to an excessively high signal level.