Detail of the Current Conveyor Technology

Core:
                 Precision 1 is a discrete design applying the newest ACSS design which can improved the RCA connection to sound as good as the ACSS connection. It seems complex , but in fact they are the most simple design the world has ever had , their a lot components to process the power supply. The Precision 1 power amp only has a single " voltage" gain stage to process signals, but works in ACSS mode so in fact it is a current gain stage instead of voltage gain stage, whereas normal design amps already include two or three voltage gain stages. The simplest and shortest signal journey brings out the most neutral and least colored sound.
                 Precision 1 applies ultra-low distortion single stage ACSS amplifier and soldered directly on the motherboard . The gain stages and pre-driver stages working on class A .
                 The diamond cross output stage design can avoid "switch distortion"  as good as the class A amp .
                 The ACSS is a non-feedback technology made with fully discrete amplifiers. Most people know the global feedback design can offer better specs in test measurements, and non-feedback can't do well in test measurements but can offer better sound for the human's ears. Here is a conflict of the classic circuits. But the ACSS opens a new field, it can offer a least coloration sound which is more neutral with very low distortion and high linearity. So it can retain the dynamics, detail and neutral sound but not sound bright or harsh.
                All signal gain is in current, achieved by the unique, superb open-loop multiple output current mirror. Incomparably precise and ultra-low distortion in the gain signal is the result. The signal path is balanced throughout and all transistors work in class A mode.
               The ACSS parts use 2 groups of high-quality class A parallel connection PSU  supply. The class A parallel connection PSU has very high input impedance to avoid pulse from the PSU from affecting the gain stages, and low output impedance with very fast speed and high linear, so it is a very clean power supply.

                Full discrete ACSS Non-Feedback amps                                                            THD ( 0DBV , AP SYS-2722)
              
                         

Drives:
              Massive use of high power parts and robust power supply guarantee vigorous current output that drives most existing loudspeakers. Precision 1 applies two channels of diamond non-feedback output stages composed of 8 pieces  transistors ,every transistors have 150W / 15A . The capacitance of the whole machine reaches as high as 45,000uF. The transformers are used with 450W.
               The Precision 1 have very wide frequency band , excellent phase distortion, boost the amp have excellent detail and dynamic reproduce .

                     Diamond Cross Zero distortion Non- Feedback output stages                                                                             Frequency Band (2.83V ,AP SYS-2722)
 
Input: 
              Precision 1  three groups  RCA single end signal, but also the top grade ACSS current signal. No matter what kind of signal it is input .

Shield and avoid vibration:
             Precision 1 uses heavyweight all aluminum alloy chassis to prevent the eddy current of transformers from interfering with the circuit board.  The interior is separated into 2 sections with aluminum boards for the best separation off the ACSS parts, the output stages and transformers. The AC power input wire is shielded by a copper channel from back to front.

             Precision 1 take care the vibration for the best sound playback. Each channels gain parts under a  aluminum heat sink , these aluminum heat sink not only poise the heat between cool and hot amps, our workers care to install all transistors cling the aluminum board for avoid the vibration cause the sounding worst. From our testing, with the aluminum board bring clear detail reproduce and less harsh than take off the aluminum board .
                  

Volume control:
            The volume control is also different from conventional technology. Conventional volume control technology is the volume control implement in the analog amp input stage through a volume pot to reduce the signal   . The volume pots quality effect the sound quality direct , the low quality volume pot cause lost the detail and channels imbalance cause the soundstage distortion  . Even the high performance volume pot still cause the detail lose. Whatever quality volume pots, must cause the S/N worst .
            But in the Precision 1 , we applied the I/V conversion volume control , the volume control just  a variable passive I/V conversion place at the ACSS amp output , where the output is the current signal, not the voltage signal. The volume control is I/V conversion, and the volume depends on the current (I) conversion to the voltage (V). (Like R-2R D/A chips output passive I/V conversion)  It can keep the signal frequency band flat and not lost any detail. It can't degrade on sound quality in every volume level . After the volume .
            Mark Levinson also knows that current volume control has great benefits, so in their Top End preamp NO.32 volume control, they use many components to change the signal to current signal (I),  then implement the volume control , and then change back to voltage signal (V) again. But Precision 1 is simply a more complete work in terms of the current signal, and technically, it is superior to conventional technology. The less conversion bring much neutral sound .
            The volume control quality is very important . It must guarantee the two channels signal control exact to achieve image of the musics playback .
            In Precision 1 , for avoid the channels signal cross , it had applied a four channels digital control relays based volume control,through changing the DALE resistors to control the volume for avoid channels imbalanced and channels cross. Two channel implement Low volume control another two channels implement high volume control , so Precision 1 can have very wide volume control performance  .While change the volume, the different relays break or close, it may had slightly switch sound on output and disappear while stop change the volume.
                        
Components:
          Uses all audiophile grade components, including DALE resistors, WIMA  caps, custom order NOVER (UK brand) caps .

Static storage mode control software:
           In most control softwares design, the MCU will continuously output data to the perform parts , the MCU had the very high speed, so the output data become high frequency impulses disturb the audio signal circuits make the sound worst . This product had applied static storage mode control software , the MCU output once control data and save in the perform parts while just power on and users operate ,then stop output data until users next operation. This design make the sound quality improve on the clear and transparency .