受注生产的超级旗舰版已喑地里制作中,除了原来的双单声道、纯甲、直流伺服、每级对管独立稳压等优点外,最终更优化成:
1〕不分 MM 和 MC,完全由增益和阻抗决定,即是例如只要调到最低增益及 47K 阻抗就是 MM、调到 60dB 增益及 100R 阻抗就是 MC,废除放大级之间额外交连,直耦直通。
2〕7 级阻抗加 1 级用家自选插座,无限匹配。
3〕7 级电容加 1 级用家自选插座,无限匹配。
4〕输入级 3 级增益选择,输出级 2 级增益选择,最高可调至 89dB 增益。
5〕三级放大速率选择,借助改变电压转换速率微调音色。
6〕四环牛加电源处理器分体供电。
技术规格:
〔首级放大〕
Frequency response: 0 Hz - 4,2 MHz, -3 dB
Frequency response with DC-servo: 0,4 Hz - 4,2 MHz, -3 dB
Power bandwidth at 10 Vrms, 68 ohms: 0,4 Hz - 270 kHz, -3 dB
Equivalent input noise: 220 nV
Equivalent input noise, with perfect balance: 160 nV (25 nV with super low noise transistors)
Signal to noise ratio: 93 dB
Signal to noise ratio, with perfect balance: 96 dB (109 dB with super low noise transistors)
Dynamic headroom: 131 dB
Dynamic headroom, with perfect balance: 134 dB (150 dB with super low noise transistors)
Distortion: < 0,001 %
Gain: 13 (22 dB)
Output impedance: 800 micro ohms
Output current: 300 mA
Gain bandwidth product: 750 MHz
The amp uncompensated
Frequency response: 0 Hz - 13 MHz, -3 dB
Power bandwidth at 10 Vrms, 68 ohms: 0,4 Hz - 440 kHz, -3 dB
Gain bandwidth product: 12 GHz
〔二级放大〕
Frequency response: 0 Hz - 270 kHz, -3 dB
Frequency response with DC-servo: 0,4 Hz - 270 kHz, -3 dB
Power bandwidth at 10Vrms, 68 ohms: 0,4 Hz - 270 kHz, -3 dB
Equivalent input noise: 220 nV
Equivalent input noise, with perfect balance: 160 nV (25 nV with super low noise transistors)
Signal to noise ratio: 71-76 dB
Signal to noise ratio, with perfect balance: 74-80 dB (90-96 dB)
Dynamic headroom: 111 dB
Dynamic headroom, with perfect balance: 114 dB (130 dB)
Distortion: < 0,001 %
Gain: 137 (43 dB)
Output impedance: 13 mohms
Output current: 300 mA
Gain bandwidth product: 750 MHz
The amp uncompensated
Frequency response: 0 Hz - 440 kHz, -3 dB
Power bandwidth at 10Vrms, 68 ohms: 0,4 Hz - 440 kHz, -3 dB
Gain bandwidth product: 12 GHz
(输出级)
Frequency response without correction network: 0 Hz - 6 MHz, -3 dB
Frequency response without correction network with DC-servo: 0,4 Hz - 6 MHz, -3 dB
Power bandwidth at 10 Vrms, 68 ohms: 0,4 Hz - 51 kHz, -3 dB
Equivalent input noise: 700 nV
Distortion: < 0,001 %
Gain: 16 at 1 kHz (24 dB)
Input impedance: 680 ohms
Output impedance: 60 mohms + resistor
Output current: 100 mA
Power bandwidth at 10 Vrms, 68 ohms: 0,4 Hz - 440 kHz, -3 dB
Gain bandwidth product: 12 GHz
Slew rate(User selectable):
14V/1,0µs (14 V/µs), 330 pF, perfect step
14V/0,6µs (23 V/µs), 220 pF, perfect step
14V/0,5µs (28 V/µs), 150 pF, perfect step
这个受注生产版是不会公开发售的。
入门版、中阶版及高阶版有望月初上市,量产的旗舰版就一定是春节后的事了。