Topping Aa50s - Bộ Preamplifier Công Nghệ NFCA Dùng Cho Headphone Single-End Cổng 6.35mm SE và 4.4mm - Hàng Chính Hãng

Topping Aa50s - Bộ Preamplifier Công Nghệ NFCA Dùng Cho Headphone Single-End Cổng 6.35mm SE và 4.4mm - Hàng Chính Hãng

Với A50s, Topping cung cấp bộ khuếch đại tai nghe chất lượng cao và bộ tiền khuếch đại ít vận động, tích hợp cả kết nối cân bằng và không cân bằng. Các mạch được tối ưu hóa của nó, dựa trên các thành phần âm thanh rất tốt, cho phép thay đổi âm thanh chính xác, chi tiết và âm nhạc. A50s cũng được thiết kế để trở nên linh hoạt, có khả năng thích ứng với đại đa số các loại tai nghe và tai nghe trên thị trường, kể cả những mẫu khó tính.

Ultra high performance NFCA module

At the heart of the A50s is an NFCA (Nested Feedback Composite Amplifier) module, identical to the one used in the brand's flagship, the A90. Its hybrid current/voltage architecture associated with UHGF (Ultra High Gain Feedback) technology offers excellent DC and AC performance. A high output current allows the amplifier to accompany all types of headphones. An ultra-low noise level of 0.3µV, a dynamic range of 144dB and the absence of background noise also allow the A50s to easily power the most sensitive EMIs.

Robust aluminium housing

The components of the A50s are integrated in a solid Aluminium frame, CNC machined with high precision. Extremely robust, it also provides excellent heat dissipation to effectively remove heat from the power supply and AOPs of the unit.

Balanced & Single-ended

Although the A50s has only an unbalanced input, it has a balanced amplifier circuit. It can therefore be used with unbalanced headphones on its 6.35mm jack output, or with balanced headphones on its 4.4mm jack output.

 

Adjustable gain

The Topping amplifier offers a gain setting of 0dB or 6dB in unbalanced mode, or 6dB and 12dB in balanced mode. Once again, this setting, coupled with an ultra-low noise of 0.3µVrms, allows the A50s to adapt to both sensitive EMIs and headphones requiring a high energy input.

An excellent preamplifier

If the main function of the A50s is headphone amplification, it is also a very good preamplifier with excellent performance. In preamplification mode, the output impedance is only 20Ω, ensuring compatibility with many devices.

Automatic switching

When the A50s is not connected to headphones or earphones, it automatically switches to preamplifier mode, with the amplified signal outputting through the RCA output on the rear panel. Conversely, if headphones are connected to the 6.35mm or 4.4mm jack outputs, the unit instantly switches to headphone amplifier function.

SPECIFICATIONS
Product type	Headphone amplifier Preampliier
Input	1x Stereo RCA
Outputs	1x Single-ended Jack 6.35mm headphone output 1x Balanced Jack 4.4mm headphone output 1x Stereo RCA preamp output
THD+N	Single-ended headphone output Jack 6.35mm : < 0.00007% @ 850mW, 32Ω, 1kHz, A-Weighting Single-ended headphone output Jack 6.35mm : < 0.00006% @ 90mW, 300Ω, 1kHz, A-Weighting Balanced headphone output Jack 4.4mm : < 0.00007% @ 3.4W, 32Ω, 1kHz, A-Weighting Balanced headphone output Jack 4.4mm : < 0.00006% @ 367mW, 300Ω, 1kHz, A-Weighting
THD	Single-ended headphone output Jack 6.35mm : < 0.0004% @ 720mW, 32Ω, 20Hz-20kHz, 90kBW Single-ended headphone output Jack 6.35mm : < 0.0002% @ 77mW, 300Ω, 20Hz-20kHz, 90kBW Balanced headphone output Jack 4.4mm : < 0.001% @ 2.88W, 32Ω, 20Hz-20kHz, 90kBW Balanced headphone output Jack 4.4mm : < 0.0005% @ 307mW, 300Ω, 20Hz-20kHz, 90kBW
SNR	Single-ended headphone output Jack 6.35mm : 137dB @ MAX OUT, 1kHz, A-Weighting Balanced headphone output Jack 4.4mm : 143dB @ MAX OUT, 1kHz, A-Weighting
Dynamic range	Single-ended headphone output  Jack 6.35mm : 138dB @ 1kHz, A-Weighting Balanced headphone output Jack 4.4mm : 144dB @ 1kHz, A-Weighting
Frequency response	Single-ended headphone output Jack 6.35mm : 20Hz - 200kHz (±0.05dB) Balanced headphone output Jack 4.4mm : 20Hz - 200kHz (±0.05dB)
Output level	Single-ended headphone output Jack 6.35mm : 21Vpp Balanced headphone output Jack 4.4mm : 42Vpp
Noise level	Single-ended headphone output Jack 6.35mm : < 0.3µVrms @ G=L, A-Weighting Single-ended headphone output Jack 6.35mm : < 0.45µVrms @ G=H, A-Weighting Balanced headphone output Jack 4.4mm : < 0.6µVrms @ G=L, A-Weighting Balanced headphone output Jack 4.4mm : < 0.95µVrms @ G=H, A-Weighting
Crosstalk	Single-ended headphone output Jack 6.35mm : -86dB @ 1kHz Balanced headphone output Jack 4.4mm : -128dB @ 1kHz
IMD CCIF	Single-ended headphone output Jack 6.35mm : -116dB @ 18kHz + 19kHz Balanced headphone output Jack 4.4mm : -116 @ 18kHz + 19kHz
IMD SMPTE	Single-ended headphone output Jack 6.35mm : -110dB, SMPTE4:1 @ 60Hz + 7kHz Single-ended headphone output Jack 6.35mm : -118dB, SMPTE1:1 @ 60Hz + 7kHz Balanced headphone output Jack 4.4mm : -110dB, SMPTE4:1 @ 60Hz + 7kHz Balanced headphone output Jack 4.4mm : -118dB, SMPTE1:1 @ 60Hz + 7kHz
Input sensitivity	Single-ended headphone output Jack 6.35mm : 7.5Vrms @ G=0dB Single-ended headphone output Jack 6.35mm : 3.8Vrms @ G=6dB Balanced headphone output Jack 4.4mm : 7.5Vrms @ G=0dB Balanced headphone output Jack 4.4mm : 3.8Vrms @ G=6dB
Gain	Single-ended headphone output Jack 6.35mm : 0dB @ G=0dB Single-ended headphone output Jack 6.35mm : 6dB @ G=6dB Balanced headphone output Jack 4.4mm : 6dB @ G=0dB Balanced headphone output Jack 4.4mm : 12dB @ G=6dB
Output impedance	Single-ended headphone output Jack 6.35mm : < 0.1Ω Balanced headphone output Jack 4.4mm : < 0.2Ω
Output power @ THD+N < 1%	Single-ended headphone output Jack 6.35mm : 2x 1.4W @ 32Ω Single-ended headphone output Jack 6.35mm : 2x 192mW @ 300Ω Balanced headphone output Jack 4.4mm : 2x 3.5W @ 32Ω Balanced headphone output Jack 4.4mm : 2x 760mW @ 300Ω
Output power @ 2Vrms IN	Single-ended headphone output Jack 6.35mm : 2x 485mW @ 32Ω Single-ended headphone output Jack 6.35mm : 2x 52mW @ 300Ω Balanced headphone output Jack 4.4mm : 2x 1950mWW @ 32Ω Balanced headphone output Jack 4.4mm : 2x 208mW @ 300Ω
Load impedance	Single-ended headphone output Jack 6.35mm : > 8Ω Balanced headphone output Jack 4.4mm : > 8Ω

GENERAL
Power supply (included)	15VDC
Housing material	Aluminum
Dimensions	11 x 12.3 x 2.6cm
Color	Silver
Package	1x Topping A50s 1x Male Jack 6.35mm to female Jack 3.5mm 1x Power supply

 

 

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