A new system for supplying power to output stage sections was applied, based upon a very efficient SMPS power supply.
As a result the weight of the product was substantially lowered. The application of the magnetic resonance phenomenon made
it possible to obtain sinusoid voltage at the secondary side of the power supply, just as it is in the case of traditional toroidal
transformer which enabled minimization of distortions generated to the environment and circuits supplying power to the
amplifier. High timing frequency of the converter outside the acoustic band has a neutral influence on the quality of the sound.
The HXi output stage combines the advantages of analogue and impulse technology that are provided by the H class.
Analogue technology ensures high quality whereas work with switch mode power supply increases power efficiency. If there
is a need for a lager power, the voltage of power supply stage is switched. It is done so thanks to the circuit with a key
and multiple power supply lines. Switching the power supply voltage takes place whitin a time much shorter than the period
of acoustic wave of the highest frequency (20kHz). Only the fastest bipolar transistors and an exceptional circuit are capable
of handling such a quick change of power supply voltage whithout an impact exerted on the exit oscillations. It is worth noticing
that the power supply voltge is increased to the acoustic signal only in this channel and only when it is necessary.
So designed amplifier provides the increase of power efficiency and reliability. Thanks to H class a safe work of output stage
transistors is possible at high power supply voltages (e.g. 270V for HXi3000) whitout the risk of secondary breakdown.
The largest HXi series amplifier possess 6 power supply voltages switched by 4 keys for each channel. High reliability of the
amplifier results from many years of expirience of the company. Work conditions of all components are calculated according
to norms and producers' recommendations. Reliability is increased by through-broach asembly. Durability is also incrreased
by a fan, which stands idle when the full outpu of the amplifier is not used. Such a solution also decreased the amount of intake
dust pumped in by the fan. A five years' long producer guarantee testifies to high reliability of the amplifier. HXi amplifiers
possess intelligent overload protections that protect against both short circuit and overload. The protection controls the radiator
temperature with the 1st degree accuracy. HXi series possess effective protection against DC signal at the output of the amplifier.
The amplifier is also protected against damage caused by pluggig to the 400V AC inter-phase voltage. HXi amplifiers possess
deliberately inverted cycle of assuming the load from the power supply capacitors in one channel towards the other one.
Thanks to that the amplifiers works both in the stereo mode, parallel mode and in the bridge mode in such as way, as it was
all the time in the bridge configuration. This results in doubled efficiency of power supply capacitors (compared to the traditional
solution) in case of signals below 100Hz. The amplifier is manufactured according to the EU norm ROHS and possess
the CE compilance certificate.
FEATURES:
Low weight thanks to the application of the switch mode power supply.
H and 2H class.
Crossover 75Hz-1200Hz
Automatic Clip limiter.
Independent protection systems for each channel: thermal, DC, overload, against saturation, ultrasonic.
Variable forced cooling system.
Silent load coupling.
Soft start.
Double input sockets type XLR & Jack.
Reliable output cockets type SPEAKON.
Bipolar transistors.
Anti-dust filter.
60 months guarantee.
HXi Series
Technical Data
Model
HXi 3000
HXi 2500
HXi 2000
Frequency response
20Hz(-1dB) - 20kHz(-0,5dB)
RMS Output Power
1kHz @ 1%THD
2x8Ω 2x4Ω
800W 1350W
680W 1150W
560W 900W
1kHz @ 1%THD Bridge
1x8Ω
2700W
2300W
1800W
Distortion (THD) 1kHz, 4Ω 80% rated power
< 0,03%
Distortion 20Hz - 20kHz 4Ω 80% rated power
< 0,05%
Damping factor 10-100Hz 8Ω
400
S/N A - weighted
> 100dB
Voltage gain
58,4
52,9
44,8
Output stage
Class 2H
Class H
Input sensitivity (V RMS)
4Ω
+4dB (1,23V)
Input impedance
balanced unbalanced
10kΩ 20kΩ
Indicators (LED)
Ready, Protect, Signal, Clip, Power Supply Protect
Controls
Ch A & Ch B volume
Cooling
Continously variable speed fan, front to back air flow
Protections
Short circuit, open circuit, overload DC output power, ultrasonic, limiter, softstart
Power supply
230V AC, 50Hz +10/-15%
No-load current
0,3A
Supply current at 1/8 output power, pink noise, 2x4Ω
5A
4,5A
3A
Supply current at 1/3 output power, pink noise, 2x4Ω
