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The Concerto Plus , High Edition Concerto , phono stage embodies the newest thinking of YS-audio dedicated and enthusiastic technical design YS Chui . The unit has 54dB of gain, and, just as importantly, the Concerto boasts an low noise level, so in practical use, the 54dB gain is usable in systems with low overall sensitivity. The Concerto uses a 6X4 rectifier tube with solid state regulator for HV B+ power supply and a 12AX7 for the gain stage. The Concerto Plus is design for the MM cartridge and High output MC cartridge ( good match with >2mv output cartridge ) . The input impedance is 47K ( accept order other impedance ).The Concerto Plus all hand made by "point-to-point" .
Features
Huge dynamic range, both the beautiful tone color and wonderful rhythm , ultra linear circuit designed for the LP and SP, it has 4 kind EQ network for select , include RIAA , London ffrr , Columbia , SP. uncanny natural flowing heart-stirring sound that matches any other ultra-Fi products on the market . The phono stage made by Hand built " point to point " on YS-Audio factory. "point to point" has become more focused, the soundstage is deeper. Hand built by " point to point ' is very high cost of manufacture ! The installation of the tubes line stage is special designed , it can prevent RF interfere and vibrate interfere, It has become very clean soundstage and saw the musical instrument hang up in the air.
he 6X4 Tube rectification opens up the soundstage and allows the music to "bloom". The melody flows naturally, like a river. In contrast, solid state rectifiers emit electromagnetic pulses that resonate throughout the audio circuit and add an electronic haze that can be perceived as a highly unnatural noise or grain. The unnaturalness of the solid state rectifier's turn on/turn off cycle creates a choppy, edgy feeling that over-emphasizes the leading edge of transients at the expense of a harmonic completeness and does not allow the individual notes to rise and decay naturally. Beside, It with solid state regulator for HV B+ power supply , the regulator give the very good bass controls , it become the sound better than popular Concerto .It can fight down many USD$5000 phono preamplifier !
The Important features
The Concerto Plus has a select control for select 4 kind phono EQ network : RIAA , London ffrr , Columbia , SP.
The RIAA EQ for prevalence LP , The London ffrr EQ for London ffrr LP , The Columbia EQ for Columbia and old NAB LP , The SP EQ for EU 2 Single-Play.

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| Many buyer e-mail to me ask about the difference between the Concerto Plus and Concerto preamp.
The following of difference between the Concerto Plus and Concerto preamp.
( 1 ) Concerto Plus with solid state regulator for HV B+ power supply and the 6X4 for constant the current ( the 6X4 is not for rectification ) , fully difference power supply.
( 2 ) Concerto Plus with upgrade gain stage
( 3 ) Concerto Plus with many upgrade part.
( 4 ) Concerto Plus with strong chassis
The "plus" version is all better sound than the standard version about two Class.
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