Topping A90 Discrete Balanced Headphone Amplifier

Topping A90 Discrete Balanced Headphone Amplifier

Name: Topping A90 Discrete Balanced Headphone Amplifier
Brand: TOPPING
SKU: TOP.A90D.BK
Price: 929.0 AUD
Availability: InStock
Rating: 5.0 (1 reviews)

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$929

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Packing an ultimate performance with fully-discrete NFCA modules, the all-new Topping A90 Discrete headphone amplifier is here. Topping has used fully discrete components to redesign its famous NFCA(Nested Feedback Composite Amplifier) module. The A90 Discrete has got four built-in NFCA discrete modules, each of them featuring 39 transistors building up a fully balanced structure. With this discrete component circuitry, the A90 Discrete packs a tremendously powerful output producing about 9800mW of clean, noise-free output ratings at 16Ω of load. Topping A90 Discrete works flawlessly with EXT90 extender adding three XLR connections and one RCA connection. Topping A90 Discrete is designed to be there with high-end desktop chains!!

Fully Discrete NFCA Modules

Topping has redesigned the famous NFCA(Nested Feedback Composite Amplifier) module with fully discrete components. The A90 Discrete houses four NFCA-Discrete modules that adopt 39 transistors building up a fully-balanced circuitry producing powerful amplification to the supplied signal. This discrete structure is supported by optimized Voltage Current hybrid feedback architecture along with UHGF(Ultra-High Gain Feedback) technology providing excellent DC and AC performance. With this fully discrete design, the output capability of the A90 Discrete is stronger than ever, providing a tremendously powerful signal amplification.

Both Balanced & Single-Ended Headphone Connections

Topping A90 Discrete houses three headphone output ports. It supports both single-ended as well as balanced headphone connections with a 4-pin XLR and 4.4mm Balanced connections and a 6.35mm single-ended connection. The amplifier is designed to cater to the needs of both low-power requiring as well as demanding headphones. It provides high output voltage, high current, and low output impedance, allowing the users to pair any headphones with the A90 Discrete.

Super-Clean Performance With Low Harmonic Distortion

Topping A90 Discrete is a highly-powerful headphone amplifier. It’s not all about the power with the A90 Discrete. It maintains ultra-low distortion even at its peak load. Talking about the specs here, Topping A90 achieves <0.1% THD+N at 6700mW of peak power at 32Ω of load. Pairing 300Ω headphones, it maintains an ultra-low distortion of <0.00003% at 950mW of load.

Two-Level Gain Settings

Topping A90 Discrete has got two-level gain settings. Low gain is suitable for IEMs and Headphones with high sensitivity while high gain can be used to drive high-power requiring full-sized headphones. In a single-ended connection, the low gain is at 0dB and high gain at 9.5dB. Balanced output connections have 6dB of gain at the low-gain level and 15.5dB of gain at the high-gain level.

Ground Loop Noise Eliminator

The ground loop might introduce some unwanted noise into the output signal that might ruin the experience for users. Topping A90 Discrete has got a GND/LIFT switch to rectify this problem. If you notice Ground Loop noise, simply switch it to Lift and A90 Discrete will eliminate the ground noise for you.

Works as a Pre-AMP too

Topping A90 Discrete works as a pre-amp too. When switched to pre-amp mode, expect a true high-end performance same as its headphone amp mode. It has 20Ω SE and 40Ω balanced output impedance. It can be used as a pre-amp and as a headphone amp simultaneously with no degradation in sound performance.

It's a great companion of active monitors stacked with D90 DAC when A90 work as pre-amp application.
Full balanced and SE headphone output
A90 is provided with a wide range of adaptation to headphones
A90 is equipped with three gain settings of -9.5dB/ 0dB / 9.5dB for SE and -35dB / 6.0dB / 15.5dB for balanced

Headphone Amplifier Specifications
THD+N @ 1kHz (A-weighted)	Single-ended Input & Single-ended Output
	<0.00007% @ 500mW (32Ω) <0.00006% @ 80mW (300Ω)
	Balanced Input & Single-ended Output
	<0.00009% @ 500mW (32Ω) <0.00006% @ 80mW (300Ω)
	Single-ended Input & Balanced Output
	<0.00007% @ 2000mW (32Ω) <0.00006% @ 320mW (300Ω)
	Balanced Input & Balanced Output
	<0.00009% @ 2000mW (32Ω) <0.00006% @ 320mW (300Ω)
THD+N @ 20-20kHz 90kBW	Single-ended Input & Single-ended Output
	<0.00004% @ 500mW (32Ω) <0.00001% @ 80mW (300Ω)
	Balanced Input & Single-ended Output
	<0.00004% @ 500mW (32Ω) <0.00001% @ 80mW (300Ω)
	Single-ended Input & Balanced Output
	<0.00004% @ 2000mW (32Ω) <0.00001% @ 320mW (300Ω)
	Balanced Input & Balanced Output
	<0.00004% @ 2000mW (32Ω) <0.00001% @ 320mW (300Ω)
SNR @ Max Out 1kHz (A-weighted)	Single-ended Input & Single-ended Output
	141dB
	Balanced Input & Single-ended Output
	137dB
	Single-ended Input & Balanced Output
	145dB
	Balanced Input & Balanced Output
	138dB
Dynamic range @ Max Out 1kHz (A-weighted)	Single-ended Input & Single-ended Output
	141dB
	Balanced Input & Single-ended Output
	137dB
	Single-ended Input & Balanced Output
	145dB
	Balanced Input & Balanced Output
	138dB
Frequency Response	Single-ended Input & Single-ended Output
	20Hz-40kHz (±0.05dB)
	Balanced Input & Single-ended Output
	20Hz-40kHz (±0.01dB)
	Single-ended Input & Balanced Output
	20Hz-40kHz (±0.05dB)
	Balanced Input & Balanced Output
	20Hz-40kHz (±0.01dB)
Output level	Single-ended Input & Single-ended Output
	9Vpp @ Gain = low 25Vpp @Gain = medium 25Vpp @Gain = high
	Balanced Input & Single-ended Output
	9Vpp @ Gain = low 25Vpp @Gain = medium 25Vpp @Gain = high
	Single-ended Input & Balanced Output
	18Vpp @ Gain = low 49Vpp @Gain = medium 49Vpp @Gain = high
	Balanced Input & Balanced Output
	18Vpp @ Gain = low 49Vpp @Gain = medium 49Vpp @Gain = high
Noise level (Audio Precision / A-weighted)	Single-ended Input & Single-ended Output
	<0.7uVrms @ Gain = low <0.7uVrms @ Gain = medium <0.9uVrms @ Gain = high
	Balanced Input & Single-ended Output
	<0.7uVrms @ Gain = low <0.7uVrms @ Gain = medium <0.9uVrms @ Gain = high
	Single-ended Input & Balanced Output
	<0.9uVrms @ Gain = low <0.9uVrms @ Gain = medium <1.4uVrms @ Gain = high
	Balanced Input & Balanced Output
	<0.9uVrms @ Gain = low <0.9uVrms @ Gain = medium <1.4uVrms @ Gain = high
Noise level (Extrapolation / A-weighted)	Single-ended Input & Single-ended Output
	<0.2uVrms @ Gain = low <0.2uVrms @ Gain = medium <0.6uVrms @ Gain = high
	Balanced Input & Single-ended Output
	<0.2uVrms @ Gain = low <0.2uVrms @ Gain = medium <0.6uVrms @ Gain = high
	Single-ended Input & Balanced Output
	<0.6uVrms @ Gain = low <0.6uVrms @ Gain = medium <1.3uVrms @ Gain = high
	Balanced Input & Balanced Output
	<0.6uVrms @ Gain = low <0.6uVrms @ Gain = medium <1.3uVrms @ Gain = high
Crosstalk @ 1kHz	Single-ended Input & Single-ended Output
	-106dB
	Balanced Input & Single-ended Output
	-102dB
	Single-ended Input & Balanced Output
	-105dB
	Balanced Input & Balanced Output
	-105dB
IMD CCIF @ 18kHz +19kHz	Single-ended Input & Single-ended Output
	-118dB
	Balanced Input & Single-ended Output
	-118dB
	Single-ended Input & Balanced Output
	-118dB
	Balanced Input & Balanced Output
	-118dB
IMD SMPTE @ 60Hz +7kHz	Single-ended Input & Single-ended Output
	-110dB @ SMPTE4 : 1 -115dB @ SMPTE1 : 1
	Balanced Input & Single-ended Output
	-110dB @ SMPTE4 : 1 -115dB @ SMPTE1 : 1
	Single-ended Input & Balanced Output
	-110dB @ SMPTE4 : 1 -115dB @ SMPTE1 : 1
	Balanced Input & Balanced Output
	-110dB @ SMPTE4 : 1 -115dB @ SMPTE1 : 1
Input sensitivity	Single-ended Input & Single-ended Output
	9.5Vrms @ Gain = low 8.8Vrms @ Gain = medium 2.9Vrms @ Gain = high
	Balanced Input & Single-ended Output
	9.5Vrms @ Gain = low 8.8Vrms @ Gain = medium 2.9Vrms @ Gain = high
	Single-ended Input & Balanced Output
	9.5Vrms @ Gain = low 8.8Vrms @ Gain = medium 2.9Vrms @ Gain = high
	Balanced Input & Balanced Output
	-110dB @ SMPTE4 : 1 -115dB @ SMPTE1 : 1
Gain	Single-ended Input & Single-ended Output
	-9.5dB @ Gain = low 0dB @ Gain = medium 9.5dB @ Gain = high
	Balanced Input & Single-ended Output
	-9.5dB @ Gain = low 0dB @ Gain = medium 9.5dB @ Gain = high
	Single-ended Input & Balanced Output
	-3.5dB @ Gain = low 6dB @ Gain = medium 15.5dB @ Gain = high
	Balanced Input & Balanced Output
	-3.5dB @ Gain = low 6dB @ Gain = medium 15.5dB @ Gain = high
Output impedance	Single-ended Input & Single-ended Output
	<0.1Ω
	Balanced Input & Single-ended Output
	<0.1Ω
	Single-ended Input & Balanced Output
	<0.2Ω
	Balanced Input & Balanced Output
	<0.2Ω
Output power	Single-ended Input & Single-ended Output
	3300mW x 2 @ 16Ω THD+N<0.1% 2000mW x 2 @ 32Ω THD+N<0.1% 250mW x 2 @ 300Ω THD+N<0.1% 125mW x 2 @ 600Ω THD+N<0.1%
	Balanced Input & Single-ended Output
	3300mW x 2 @ 16Ω THD+N<0.1% 2000mW x 2 @ 32Ω THD+N<0.1% 250mW x 2 @ 300Ω THD+N<0.1% 125mW x 2 @ 600Ω THD+N<0.1%
	Single-ended Input & Balanced Output
	7600mW x 2 @ 16Ω THD+N<0.1% 6400mW x 2 @ 32Ω THD+N<0.1% 1000mW x 2 @ 300Ω THD+N<0.1% 500mW x 2 @ 600Ω THD+N<0.1%
	Balanced Input & Balanced Output
	7600mW x 2 @ 16Ω THD+N<0.1% 6400mW x 2 @ 32Ω THD+N<0.1% 1000mW x 2 @ 300Ω THD+N<0.1% 500mW x 2 @ 600Ω THD+N<0.1%
Load impedance	Single-ended Input & Single-ended Output
	>8Ω
	Balanced Input & Single-ended Output
	>8Ω
	Single-ended Input & Balanced Output
	>8Ω
	Balanced Input & Balanced Output
	>8Ω
Preamplifier Specs
THD+N @ 1kHz (A-weighted)	Single-ended Input & Single-ended Output
	<0.00006%
	Balanced Input & Single-ended Output
	<0.00006%
	Single-ended Input & Balanced Output
	<0.00006%
	Balanced Input & Balanced Output
	<0.00006%
THD+N @ 20-20kHz 90kBW	Single-ended Input & Single-ended Output
	<0.0001%
	Balanced Input & Single-ended Output
	<0.0001%
	Single-ended Input & Balanced Output
	<0.0001%
	Balanced Input & Balanced Output
	<0.0001%
SNR @ Max Out 1kHz (A-weighted)	Single-ended Input & Single-ended Output
	141dB
	Balanced Input & Single-ended Output
	137dB
	Single-ended Input & Balanced Output
	145dB
	Balanced Input & Balanced Output
	138dB
Plage dynamique @ Max Out 1kHz (A-weighted)	Single-ended Input & Single-ended Output
	141dB
	Balanced Input & Single-ended Output
	137dB
	Single-ended Input & Balanced Output
	145dB
	Balanced Input & Balanced Output
	138dB
Frequency Response	Single-ended Input & Single-ended Output
	20Hz-40kHz (±0.05dB)
	Balanced Input & Single-ended Output
	20Hz-40kHz (±0.01dB)
	Single-ended Input & Balanced Output
	20Hz-40kHz (±0.05dB)
	Balanced Input & Balanced Output
	20Hz-40kHz (±0.01dB)
Output level	Single-ended Input & Single-ended Output
	9Vpp @ Gain = bas 25Vpp @Gain = moyen 25Vpp @Gain = haut
	Balanced Input & Single-ended Output
	9Vpp @ Gain = bas 25Vpp @Gain = moyen 25Vpp @Gain = haut
	Single-ended Input & Balanced Output
	18Vpp @ Gain = bas 49Vpp @Gain = moyen 49Vpp @Gain = haut
	Balanced Input & Balanced Output
	18Vpp @ Gain = bas 49Vpp @Gain = moyen 49Vpp @Gain = haut
Noise level (Audio Precision / A-weighted)	Single-ended Input & Single-ended Output
	<0.7uVrms @ Gain = bas <0.7uVrms @ Gain = moyen <0.9uVrms @ Gain = haut
	Balanced Input & Single-ended Output
	<0.7uVrms @ Gain = bas <0.7uVrms @ Gain = moyen <0.9uVrms @ Gain = haut
	Single-ended Input & Balanced Output
	<0.9uVrms @ Gain = bas <0.9uVrms @ Gain = moyen <1.4uVrms @ Gain = haut
	Balanced Input & Balanced Output
	<0.9uVrms @ Gain = bas <0.9uVrms @ Gain = moyen <1.4uVrms @ Gain = haut
Noise level (Extrapolation / A-weighted)	Single-ended Input & Single-ended Output
	<0.2uVrms @ Gain = bas <0.2uVrms @ Gain = moyen <0.6uVrms @ Gain = haut
	Balanced Input & Single-ended Output
	<0.2uVrms @ Gain = bas <0.2uVrms @ Gain = moyen <0.6uVrms @ Gain = haut
	Single-ended Input & Balanced Output
	<0.6uVrms @ Gain = bas <0.6uVrms @ Gain = moyen <1.3uVrms @ Gain = haut
	Balanced Input & Balanced Output
	<0.6uVrms @ Gain = bas <0.6uVrms @ Gain = moyen <1.3uVrms @ Gain = haut
Crosstalk @ 1kHz	Single-ended Input & Single-ended Output
	-106dB
	Balanced Input & Single-ended Output
	-102dB
	Single-ended Input & Balanced Output
	-105dB
	Balanced Input & Balanced Output
	-102dB
IMD CCIF @ 18kHz +19kHz	Single-ended Input & Single-ended Output
	-118dB
	Balanced Input & Single-ended Output
	-118dB
	Single-ended Input & Balanced Output
	-118dB
	Balanced Input & Balanced Output
	-118dB
IMD SMPTE @ 60Hz +7kHz	Single-ended Input & Single-ended Output
	-110dB @ SMPTE4 : 1 -115dB @ SMPTE1 : 1
	Balanced Input & Single-ended Output
	-110dB @ SMPTE4 : 1 -115dB @ SMPTE1 : 1
	Single-ended Input & Balanced Output
	-110dB @ SMPTE4 : 1 -115dB @ SMPTE1 : 1
	Balanced Input & Balanced Output
	-110dB @ SMPTE4 : 1 -115dB @ SMPTE1 : 1
Input sensitivity	Single-ended Input & Single-ended Output
	9.5Vrms @ Gain = bas 8.8Vrms @ Gain = moyen 2.9Vrms @ Gain = haut
	Balanced Input & Single-ended Output
	9.5Vrms @ Gain = bas 8.8Vrms @ Gain = moyen 2.9Vrms @ Gain = haut
	Single-ended Input & Balanced Output
	9.5Vrms @ Gain = bas 8.8Vrms @ Gain = moyen 2.9Vrms @ Gain = haut
	Balanced Input & Balanced Output
	9.5Vrms @ Gain = bas 8.8Vrms @ Gain = moyen 2.9Vrms @ Gain = haut
Gain	Single-ended Input & Single-ended Output
	-9.5dB @ Gain = bas 0dB @ Gain = moyen 9.5dB @ Gain = haut
	Balanced Input & Single-ended Output
	-9.5dB @ Gain = bas 0dB @ Gain = moyen 9.5dB @ Gain = haut
	Single-ended Input & Balanced Output
	-3.5dB @ Gain = bas 6dB @ Gain = moyen 15.5dB @ Gain = haut
	Balanced Input & Balanced Output
	-3.5dB @ Gain = bas 6dB @ Gain = moyen 15.5dB @ Gain = haut
Output impedance	Single-ended Input & Single-ended Output
	20Ω
	Balanced Input & Single-ended Output
	20Ω
	Single-ended Input & Balanced Output
	40Ω
	Balanced Input & Balanced Output
	40Ω

A90 Balanced Headphone Amplifier
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6.35mm to 3.5mm Connector
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Topping A90 Discrete Balanced Headphone Amplifier

Description

Fully Discrete NFCA Modules

Both Balanced & Single-Ended Headphone Connections

Super-Clean Performance With Low Harmonic Distortion

Two-Level Gain Settings

Ground Loop Noise Eliminator

Works as a Pre-AMP too

Headphone Amplifier Specifications

Preamplifier Specs

Customer Reviews

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