KECES AUDIO在今年年尾推出全新旗艦前級 S4 ，S4的功能與設計一啲都唔簡單， 除了採用單端純甲類線路設計，在行晶體管（石機）的前級線路設計上非常罕見之外，更配合獨立分體電源設計，有效減少變壓器對主機的干擾。另外S4的重頭戲，就係內置高質素經日本DS Audio官方認證的光學唱頭放大線路，DS AUDIO唱頭用家可以由光學唱頭透過PHONO CABLE直接插入S4即可使用。
| 輸入 | MM/MC*1 / Optical*1 / RCA*1 / XLR*2 |
| 輸入阻抗 | MC: 56/100/220/470/47K MM: 47K OPT: More than 10K RCA/XLR: 170K |
| 輸出 | RCA*2 / XLR*1 / Headphone XLR-4pin |
| 總諧波失真 (THD+N) | MM<0.02%, MC<0.05%, OPT<0.04% RCA<0.0015%, XLR<0.0015% |
| 訊噪比 | MM: 78dB A-Weighted MC: 70dB A-weighted Optical: 75dB A-weighted RCA: 110dB A-weighted XLR: 110dB A-weighted |
| 增益 | MM: 52dB / MC: 72dB / OPT: 32dB RCA/XLR: 20dB |
| 額定電源電壓 | Standby: 0.5 Watt Maximum: 90 Watts |
| 機身材質 | All Aluminum |
| 尺寸 | 300x279x66mm*2 |
| 重量 | Net Weight 4.5KG(Power) / 3.5KG(Pre) Shipping Weight 10KG |
特性：
- 使用單端Ａ類、零負回授電路，以簡單即是好的電路帶來最純淨的聲音
- 完全對稱的電路結構，提供平衡和非平衡的輸入輸出。
- 前級擴大機電路板採用雙單聲道結構。
- 精心設計的音量控制由R-2R搭建，提供了在128階裡的每一階音量都具
- 相同的輸入阻抗，並保證在最低音量下也有著極佳的。
- 左右聲道平衡。
- 使用電源分離式的線性電源提供最純淨的電源給前級擴大機。
- 內建DS Audio的光學唱頭等化電路和MM/MC唱頭放大器。
- 內建高品質的耳機擴大機。
- 配備全金屬紅外線遙控器。
Description:
Description
KECES AUDIO has launched its new flagship preamplifier, the S4, at the end of this year. The functionality and design of the S4 are anything but simple. In addition to employing a single-ended pure Class A circuit design, which is rare in transistor-based preamplifier designs, it features an independent separated power supply design that effectively reduces transformer interference with the main unit. Another highlight of the S4 is its built-in high-quality optical cartridge amplifier circuit, officially certified by Japan’s DS Audio. Users of DS AUDIO cartridges can connect directly to the S4 via a PHONO CABLE.
Inputs:
- MM/MC*1
- Optical*1
- RCA*1
- XLR*2
Input Impedance:
- MC: 56/100/220/470/47K
- MM: 47K
- OPT: More than 10K
- RCA/XLR: 170K
Outputs:
- RCA*2
- XLR*1
- Headphone XLR-4pin
Total Harmonic Distortion (THD+N):
- MM < 0.02%
- MC < 0.05%
- OPT < 0.04%
- RCA < 0.0015%
- XLR < 0.0015%
Signal-to-Noise Ratio:
- MM: 78dB A-Weighted
- MC: 70dB A-weighted
- Optical: 75dB A-weighted
- RCA: 110dB A-weighted
- XLR: 110dB A-weighted
Gain:
- MM: 52dB
- MC: 72dB
- OPT: 32dB
- RCA/XLR: 20dB
Rated Power Voltage:
- Standby: 0.5 Watt
- Maximum: 90 Watts
Body Material:
- All Aluminum
Dimensions:
- 300x279x66mm*2
Weight:
- Net Weight: 4.5KG (Power) / 3.5KG (Pre)
- Shipping Weight: 10KG
Features:
- Utilizes a single-ended Class A, zero negative feedback circuit to provide the purest sound through a simple yet effective design.
- Fully symmetrical circuit structure, offering balanced and unbalanced input/output.
- Preamplifier circuit board adopts a dual mono structure.
- Thoughtfully designed volume control built on an R-2R architecture, ensuring every one of the 128 steps has the same input impedance and guarantees excellent balance at the lowest volume.
- Uses a separated linear power supply to provide the purest power to the preamplifier.
- Built-in equalization circuit for DS Audio optical cartridges and MM/MC cartridge amplifiers.
- High-quality built-in headphone amplifier.
- Equipped with a full-metal infrared remote control.
