Couplée avec le Dx170, vous prenez un gap sonore bluffant, la profondeur de scène et énorme, ainsi qu`une basse présente et bien texturée, la largeur de scène prend aussi de l`ampleur, le tout et magique ! Un achat de haute qualité.
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Portable Headphone NFCA Amplifier Balanced Black
The Topping NX7 is a compact and powerful portable amplifier, offering a beautiful precision and richness of sound. It is equipped with a new NFCA amplifier circuit specifically designed for portable amplification systems. Its low power consumption allows for long battery life, while ensuring excellent audio performance, with a THD+N 0.00007% and an SNR of 135dB. This module is powerful enough to accompany both demanding headphones and extremely sensitive earphones.
The NX7 is capable of delivering a power of 2x180mW under an impedance of 300Ω, with what's more an adjustable gain on three levels: -13.8dB, -0.1dB or 13.9dB. Thus, it will have no trouble powering high-impedance headphones. Moreover, even with a high power of 200mW, the distortion remains extremely low with a measurement at 0.00008%. The background noise of the NX7 is less than 0.3µV and therefore perfectly inaudible. Finally, its impedance of only 0.1Ω ensures a sound reproduction without coloration, even with high sensitivity headphones.
The NX7's components are clad in a sturdy aluminum chassis with flanges to protect the connectors and plugs, while preventing unwanted volume changes.
On the output side, the NX7 provides both a balanced 4.4mm jack output and a single-ended 3.5mm jack output, adaptable to any listening equipment.
Totally optimized, the NX7 offers a consequent autonomy being able to reach 20 hours in the case of a use with a low or average gain. In high gain mode, the autonomy remains important with its 10h in reading. It integrates for that a battery of not less than 4000mAh.
Specifications | |
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Product type | Portable headphone amplifier |
Amplification module | NFCA |
Input | 1x Jack 3.5mm |
Outputs | 1x Single-ended Jack 3.5mm 1x Balanced Jack 4.4mm |
Measurements | ||
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Single-ended Jack 3.5mm output | Balanced Jack 4.4mm output | |
THD+N @ 1kHz (A-Weighting) | < 0.00008% @ Output = 200mW, 32Ω < 0.00007% @ Output = 83mW, 300Ω | < 0.00008% @ Output = 200mW, 32Ω < 0.00007% @ Output = 83mW, 300Ω |
THD @ 20Hz-20kHz (90kBW) | < 0.001% @ Output = 200mW, 32Ω < 0.0002% @ Output = 83mW, 300Ω | < 0.001% @ Output = 200mW, 32Ω < 0.0002% @ Output = 83mW, 300Ω |
SNR @ Max out, 1kHz (A-Weighting) | 135dB | 135dB |
SNR @ 50mV Output level, 1kHz | 104dB | 104dB |
Dynamic range @ 1kHz (A-Weighting) | 135dB | 135dB |
Frequency response | 20Hz-40kHz (±0.1dB) | 20Hz-40kHz (±0.1dB) |
Output level | 7.4Vpp @ G=L 11Vpp @ G=M 21Vpp @ G=H | 7.4Vpp @ G=L 11Vpp @ G=M 21Vpp @ G=H |
Measured noise level (Audio Precision) @ A-Weighting | < 0.7µVrms @ G=L < 0.7µVrms @ G=M < 2.0µVrms @ G=H | < 0.7µVrms @ G=L < 0.7µVrms @ G=M < 2.0µVrms @ G=H |
Actual noise level* @ A-Weighting | < 0.3µVrms @ G=L < 0.3µVrms @ G=M < 1.3µVrms @ G=H | < 0.3µVrms @ G=L < 0.3µVrms @ G=M < 1.3µVrms @ G=H |
Channel crosstalk @ 1kHz | -91dB | -96dB |
Input sensitivity | 13Vrms @ G=L 4Vrms @ G=M 1.5Vrms @ G=H | 13Vrms @ G=L 4Vrms @ G=M 1.5Vrms @ G=H |
Gain | -13.8dB @ G=L -0.1dB @ G=M 13.9dB @ G=H | -13.8dB @ G=L -0.1dB @ G=M 13.9dB @ G=H |
Output impedance | < 0.1Ω | < 0.1Ω |
Output power | 2x1200mW @ 16Ω, THD+N <0.1% 2x1400mW @ 32Ω, THD+N <0.1% 2x820mW @ 64Ω, THD+N <0.1% 2x180mW @ 300Ω, THD+N <0.1% 2x90mW @ 600Ω, THD+N <0.1% | |
Adapter impedance | > 8Ω |
* The actual noise level is obtained by boosting the noise of the NX7 by 40dB using a low noise amplifier before the APx555B, then dividing the measured value by 100.
General | |
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Dimensions | 135 x 70 x 16mm |
Package | 1x Toping NX7 1x Jack 3.5mm cable 1x USB-A to USB-C cable 2x Rubber bands 1x Rubber pad |
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