二嫂Esoteric F03A合并式功放,日本Esoteric旗下F-03A综合放大器,它是F系列当中等级最高的,也是唯一的纯A类综合放大器,在8Ω负载条件下,可以提供30W的输出功率,4Ω时可以翻倍至60W,虽然没有超大功率输出,但足以应对大多数家用音箱。
F-03A承袭自家最高阶Grandioso系列的技术精华,内部的全平衡前级架构是来自于Grandioso C1,再搭配纯A类功率放大。全机采用双单声道设计,从前级输入一直到后级功率输出的最后阶段都是如此,左右声道完全独立可以有效降低串音干扰的问题。内部搭载940VA大型EI变压器,每声道具备40000μF(10000μF × 4)的滤波电容。每声道使用3对Sanken的LAPT功率晶体并联推挽输出,同样的晶体也能在旗舰级S1、M1身上看到,可提供17安培的电流供应,最大峰值达34安培。
音量控制部分,F-03A采用独家QVCS(Quad Volume Control System)音量控制系统,同样是来自旗舰C1前级的技术,使用4组电阻数组分别控制左右声道的+、-音乐讯号。输出/入端子方面,F-03A拥有4组RCA输入、2组XLR输入、1组XLR Pre in,还有1组RCA端子支持MM/MC唱头输入。输出端子有XLR、RCA前级输出各1组,另外前面版上有1组6.3mm耳机输出,搭配独立耳机输出线路。
技术参数
Esoteric F-03A
型式:纯A类综合放大器
输出功率:30W(@8Ω)、60W(@4Ω)
总谐波失真:0.006%
频率响应:10Hz~100kHz(1W, +0/-3.0dB)
信噪比:104dB
阻尼因子:370
前级增益:24.5dB(最大音量)
后级增益:29dB
尺寸:445x191x468mm(WxHxD)
重量:32kg
Speaker output | Rated output | 30W + 30W (8Ω) 60W + 60W (4Ω) |
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Total harmonic distortion (1kHz, 8Ω) |
0.006% (30W) | |||||||||
Frequency response (+0/-3.0 dB at 1W output) |
10Hz - 100kHz | |||||||||
S/N ratio (IHF-A) | 104dB | |||||||||
Damping factor | 370 | |||||||||
Minimum compatible impedance | 4Ω | |||||||||
Speaker output connectors | 2 pairs (L/R) (screw type) | |||||||||
Input impedance | XLR, RCA | 10kΩ | ||||||||
PHONO (MM) | 47kΩ | |||||||||
PHONO (MC) | 100Ω | |||||||||
EXT. PRE IN | 47kΩ | |||||||||
Output impedance | XLR, RCA | 100Ω | ||||||||
PRE OUT S/N ratio (at 1V output) | ||||||||||
XLR, RCA input | 110dB | |||||||||
PHONO (MM) input | 93dB | |||||||||
PHONO (MC) input | 75dB | |||||||||
Gain | Preamplifier | 24.5dB (when VOLUME at maximum) | ||||||||
Power amplifier | 29dB | |||||||||
Tone controls | BASS tone curve | ±12dB (63Hz) | ||||||||
MIDDLE tone curve | ±12dB (630Hz) | |||||||||
TREBLE tone curve | ±12dB (14kHz) | |||||||||
General | Power supply / Power consumption | AC 230V 50Hz / 290W (no signal: 290W) AC 120V 60Hz / 290W (no signal: 215W) AC 220V 60Hz |
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External dimensions (W x H x D) |
445 x 191 x 468mm (17 5/8″ x 7 5/8″ x 18 1/2″) (including protrusions) |
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Weight | 32kg (70 5/8 lb) | |||||||||
Included accessories | Power cord x 1 Remote control (RC-1301) x 1 Batteries (AAA) x 2 Felt pads x4 Owner's manual x 1 Warranty card x 1 |
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BASS tone curve
MIDDLE tone curve
TREBLE tone curve