二嫂Esoteric F03A合并式功放,日本Esoteric旗下F-03A綜合放大器,它是F系列當中等級最高的,也是唯一的純A類綜合放大器,在8Ω負載條件下,可以提供30W的輸出功率,4Ω時可以翻倍至60W,雖然沒有超大功率輸出,但足以應對大多數家用音箱。
F-03A承襲自家最高階Grandioso系列的技術精華,內部的全平衡前級架構是來自于Grandioso C1,再搭配純A類功率放大。全機采用雙單聲道設計,從前級輸入一直到后級功率輸出的最后階段都是如此,左右聲道完全獨立可以有效降低串音干擾的問題。內部搭載940VA大型EI變壓器,每聲道具備40000μF(10000μF × 4)的濾波電容。每聲道使用3對Sanken的LAPT功率晶體并聯推挽輸出,同樣的晶體也能在旗艦級S1、M1身上看到,可提供17安培的電流供應,最大峰值達34安培。
音量控制部分,F-03A采用獨家QVCS(Quad Volume Control System)音量控制系統,同樣是來自旗艦C1前級的技術,使用4組電阻數組分別控制左右聲道的+、-音樂訊號。輸出/入端子方面,F-03A擁有4組RCA輸入、2組XLR輸入、1組XLR Pre in,還有1組RCA端子支持MM/MC唱頭輸入。輸出端子有XLR、RCA前級輸出各1組,另外前面版上有1組6.3mm耳機輸出,搭配獨立耳機輸出線路。
技術參數
Esoteric F-03A
型式:純A類綜合放大器
輸出功率:30W(@8Ω)、60W(@4Ω)
總諧波失真:0.006%
頻率響應:10Hz~100kHz(1W, +0/-3.0dB)
信噪比:104dB
阻尼因子:370
前級增益:24.5dB(最大音量)
后級增益: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