By SOUNDXTREME MAGAZINE
Mercury, the car audio branding developed by Thai developer who direct experience directly with car audio aspect and the direct experience of car audio competition that Mercury try to find the greatest technology and finding the way how to make Mercury’s car audio components represent audiophile sound.
From the success of Mercury we can see from their product launch from the past such Mercury MGR series, MCR series and the recent series such Krystal series which all product series can come directly to end user within short period. All product series of Mercury can apply for everyday use and use for competition team also which we can see so many champion that Mercury has been get back both Thailand and Asian country.
Mercury has launched within Thailand, South East Asia and European country that Mercury is the sponsorship of EMMA Europe also.
Maestro Series born for music lover
From the continuous development of Mercury, this car audio brand has brings up the information from different consumers and different market to find out the realistic musical technology such Mercury Maestro series that born especially for music lover. Maestro series has been developed for audiophile use with high quality electronic components, high technology circuit system for transferring the true musical. The first launch of Mercury Maestro series has MS-904, the 4 channels hybrid vacuum tube amplifiers and MS1500, the solid state class D mono amplifier which we will describe these 2 new amplifier series in our Cover Story column.
Mercury MS-904
The 4 channels hybrid vacuum tube amplifier looks outstanding from its luxury look, composed with high technology circuit system works together with classic technology such vacuum tube with the aims for let the sound represent out with true musical.
Hybrid Vacuum Tube technology
The development of MS-904 has brings up hybrid technology which the car audio market becomes popular. The vacuum tube will works as the pre-amplifier stage after the signal input has already passing from OP-Amp I.C.
MS-904 has chosen 6N series Russian twin triode Vacuum tube as the pre-amplifier stage which this vacuum tube has installs on the firmly circuit board which it cannot break or slip off from the socket after we installed this amplifier in the car for a long time.
Circuit system
The circuit system of MS-904 has full of quality by divided each amplifier stage out, the electronic component has composed together on circuit board which the circuit line has coated with 24K gold. MS-904 has using the switching system which has coil and filter capacitors works together and controlling the switching part with chip I.C. SG3525 which also has cooling fan reduce the temperature of power supply part.
The signal input of MS-904 has controlling with SMD OP-AMP I.C. chip 2068 which is a low noise type, sending the signal out to amplifying part which using twin triode vacuum tube from 6N vacuum tube series works together with WIMA capacitors.
The Amplifying stage of MS-904 has chosen class AB 4 channels which this stage has chosen the output transistor from SANKEN C2837 for supply out with sound quality.
Specifications
Output power
90 watts x 4 @ 4 Ohms
140 watts x 4 @ 2 Ohms
Frequency Response 20 – 20,000 Hertz(-3dB)
THD 90 dB
Input impedance 20K Ohms
Input sensitivity 250 mV – 8 Volts
Conclusion
The soften and smooth sound of Mercury MS-904 can makes me forget solid state amplifier for a big while with its great tonal balance and the continuous sound which it supply out through the speaker system that music lover shouldn’t be missed.
Imported and Distributed by Cytech World Co., Ltd.
Tel. +662 385-7849, +662 758-5003, +668 8254-8999