Birth of the current mode audio amplification technology
Six years ago, when we were studying the high speed current mode communication circuit in our lab, accidentally we found out this circuit couldn’t process the communication signal but it had the excellent audio performance. Then we started to made researches on current mode technology to see whether it could be used for audio amplification. After two years of unremitting efforts, the first current mode audio amplifier was born, which was designed with the entirely new ideas and topological structure. This current mode audio amplifier has the amazing frequency band of 1MHz at 2*100w output, the IMD is too low to be tested.
Photos about researching the first current mode amplifier in the year 2005Patent on current mode amplification
In 1970, Dr. Otalc proposed the theory of transient inter modulation distortion (TIMD), which pointed that the traditional transistor amplifier, when processing the high frequency signals of great dynamic, would cause the TIMD. The TIMD can be measured and the unpleasant sound caused by it can be clearly heard. There is no simple and effective way found to solve this problem up to now. Many Hi-end manufacturers like using non-feedback technology to avoid TIMD, which not only costs dear, but also can’t ensure the system to be stable enough.
In 1989, English scholar D.C Wadsworth firstly put forward an idea of applying the current mode circuit into audio system at the 87 session of AES meetings. He pointed that current mode circuit could lower the TIMD significantly and it was the only way near to perfect analog amplification. In 2006, we applied for the invention patent of current mode amplifier. Through 5 years’ continuous study and 22 different experiments and tests, till the year 2011, the first current mode headphone amplifier CMA800 was born. Current mode amplifier achieves the ultra-high speed and ultra-low distortion; it perfectly catches the dynamics and transparency of the music; it precisely uncovers the details buried deep in the audio track. It is almost a perfect analog amplifier.
Patent on current mode amplification
Papers published on authoritative audio journal
- 1. This is the upgraded version, model name is change to CMA800R, "R" means "Reference". With the full balance function, it will be a reference for not only our HP amp, but also, I am confident for most HP amplifiers.
2. The front panel added "Full Balance Output", and "Mono/Stereo" option. Switch to "Mono" option, you can connect "Full Balance output" to listen Left /Right channel, function as Mono amplifier, so full balance will need a pair of CMA800R. You can use a Pre-amp to control it, there is "Pre-amp" input on rear panel.
3. The package, you know we use a wooden case to house the CMA800,and then pack with 2-layers of carton boxes. The wooden case looks nice, it's luxury, but it's easy broken during transportation. So in future we will give up this wooden case, and redesign the foam size, redesign the carton box. But this time, these are not ready, so I used the old carton &wooden case to pack CMA800R, stuffed fully with foam, looks not nice but can be better protect the CMA800R. So I hope you will not mind the poor package this time.
It works well, sound performance is good. Hope it arrive you early!
Customer Questions & Answers
- Previous Page
- Next Page