TOPPING A90 DISCRETE Discrete Balanced Headphone Amplifier Preamplifier Silver

Topping returns with the A90 Discrete, an improvement of the previous A90, this time equipped with discrete components. Both a headphone amplifier and a preamplifier, it incorporates a discrete NFCA amplifier stage capable of supporting most headphones on the market. Its careful design using many high-end components allows it to deliver a rich, clear and transparent sound.

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Reference : 16595
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499,17 € tax excl.
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2 Years warranty

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    Topping A90 Discrete

    Discrete Balanced Headphone Amplifier Preamplifier Silver

    Topping A90 Discrete Amplificateur Casque Préamplificateur Discret Symétrique

    Topping returns with the A90 Discrete, an improvement of the previous A90, this time equipped with discrete components. Both a headphone amplifier and a preamplifier, it incorporates a discrete NFCA amplifier stage capable of supporting most headphones on the market. Its careful design using many high-end components allows it to deliver a rich, clear and transparent sound.

    Topping A90 Discrete Amplificateur Casque Préamplificateur Discret Symétrique

    Discrete NFCA amplifier

    Topping's A90 Discrete features a Nested Feedback Composite Amplifier (NFCA) stage based on the use of discrete components. The four integrated discrete NFCA modules each use 39 transistors in a balanced design. The optimized hybrid voltage/current feedback architecture and Ultra High Gain Feedback (UHGF) technology provide excellent DC and AC performance. With this new design, the A90 Discrete benefits from high output power, allowing it to accompany both high-sensitivity headphones and high-impedance headphones effortlessly. Precisely matched ultra-low noise transistors connected in parallel ensure extremely low noise and distortion.

    Topping A90 Discrete Amplificateur Casque Préamplificateur Discret Symétrique

    High output voltage and current

    The Topping A90 Discrete offers both high output voltage and current. The former allows the amplifier to accompany high impedance headphones without difficulty, while the latter provides sufficient power for low sensitivity headphones.

    Topping A90 Discrete Amplificateur Casque Préamplificateur Discret Symétrique

    Two gain settings

    The unit also offers two different gain settings to accommodate an ever-growing array of headphones: low gain for high-sensitivity headphones, high gain for the most demanding headphones. Combined with a noise level of only 0.2µVrms, even the most sensitive IEMs will not suffer from any noise.

    Topping A90 Discrete Amplificateur Casque Préamplificateur Discret Symétrique

    Elimination of mass loops

    A ground loop can occur when several devices are used together. Therefore, the A90 Discrete provides a GND/LIFT switch to solve this problem. In normal use, if no sound fault occurs, the switch can be set to GND. Otherwise, if a ground loop is encountered, the switch should be set to LIFT.

    Topping A90 Discrete Amplificateur Casque Préamplificateur Discret Symétrique

    Integrated preamplifier

    In addition to its headphone amplifier section, the A90 Discrete includes a preamp circuit. In preamp mode, you get the same performance as in headphone amplifier mode. The single-ended 20Ω and balanced 40Ω outputs allow to accompany many amplifiers. Moreover the two modes can be used simultaneously and the remote control allows to access each function easily.

    Topping A90 Discrete Amplificateur Casque Préamplificateur Discret Symétrique

    12V Trigger

    The A90 Discrete is equipped with a 12V trigger that can work as an active control (trigger output) or passive control (trigger input). Thus, the A90 Discrete can be switched on and off in full synchronization with other 12V triggered devices in your audio system.

    Topping A90 Discrete Amplificateur Casque Préamplificateur Discret Symétrique

    Custom volume control

    The Topping A90 Discrete uses an R2R volume control, composed of relays and resistors. It offers extremely precise control, perfect channel balance and excellent durability.

    Topping A90 Discrete Amplificateur Casque Préamplificateur Discret Symétrique

    Possibility of extension

    The A90 Discrete can be combined with the Topping EXT90, the latter offering a possibility of extension of the connectivity of the device. With the EXT90 connected, you will have four XLR inputs and two RCA inputs in total..

    The Topping EXT90 is sold separately.

    Topping A90 Discrete Amplificateur Casque Préamplificateur Discret Symétrique
    Topping A90 Discrete Amplificateur Casque Préamplificateur Discret Symétrique
    1Input LED
    2Output LED
    3IR Receiver
    4Power LED
    5Volume indicator
    6Balanced XLR 4 pins headphone output
    7Balanced Jack 4.4mm headphone output
    8Single-ended Jack 6.35mm headphone output
    9Multi-function button
    10USB interface for firmware update
    11Balanced XLR input
    12Balanced XLR output
    1312V Trigger interface
    14Power connector
    15Extension interface
    16Single-ended RCA input
    17Single-ended RCA input
    18GND/LIFT Switch
    19Power switch

    Topping A90 Discrete  review by Audio Science Review (Amir)

    " From design point of view, this is another watershed audio/engineering event brought to us by Topping. Who would have thought that this company would keep breaking new ground instead of all the major/usual names we know in hi-fi. It is my pleasure to add Topping A90 Discrete headphone amplifier/pre-amplifier to my recommended list. "
    Test du Topping A90 Discrete par Audio Science Review (Amir)

    Technical characteristics

    Specifications
    Product typeHeadphone amplifier
    Preamplifier
    Inputs1x Balanced stereo XLR
    1x Single-ended stereo RCA
    Outputs1x Balanced stereo XLR
    1x Single-ended stereo RCA
    1x Balanced Jack 4.4mm headphone output
    1xBalanced XLR 4 pins headphone output
    1x Single-ended Jack 6.35mm headphone output
    Discrete headphone amplifier performance
    SE Input/ SE OutputBAL Input / SE OutputSE Input / BAL OutputBAL Input / BAL Output
    THD+N @ 1kHz (A-Weighting)< 0.000065% @ 500mW, 32Ω< 0.00008% @ 500mW, 32Ω< 0.000065% @ 2000mW, 32Ω< 0.00008% @ 2000mW, 32Ω
    < 0.000055% @ 80mW, 300Ω< 0.00006% @ 80mW, 300Ω< 0.000055% @ 320mW, 300Ω< 0.00006% @ 500mW, 300Ω
    THD+N @ 20Hz-20kHz (90kBW)< 0.0003% @ 500mW, 32Ω< 0.0003% @ 500mW, 32Ω< 0.0006% @ 2000mW, 32Ω< 0.0006% @ 2000mW, 32Ω
    < 0.00025% @ 80mW, 300Ω< 0.00025% @ 80mW, 300Ω< 0.00025% @ 320mW, 300Ω< 0.00025% @ 320mW, 300Ω
    SNR @ Max Out, 1kHz (A-Weighting)141dB137dB145dB138dB
    Dynamic range @ 1kHz (A-Weighting)141dB137dB145dB138dB
    Frequency response20Hz-40kHz (±0.1dB)20Hz-40kHz (±0.1dB)20Hz-40kHz (±0.1dB)20Hz-40kHz (±0.1dB)
    Output level25Vpp25Vpp49Vpp49Vpp
    Measured noise level @ A-Weighting< 0.7µVrms @ G=L< 0.7µVrms @ G=L< 1µVrms @ G=L< 1µVrms @ G=L
    < 1.1µVrms @ G=H< 1.1µVrms @ G=H< 1.8µVrms @ G=H< 1.8µVrms @ G=H
    Actual noise level @ A-Weighting< 0.2µVrms @ G=L< 0.2µVrms @ G=L< 0.7µVrms @ G=L< 0.7µVrms @ G=L
    < 0.6µVrms @ G=H< 0.6µVrms @ G=H< 1.6µVrms @ G=H< 1.6µVrms @ G=H
    Channel crosstalk @ 1kHz-107dB-105dB-116dB-113dB
    Input sensitivity9.1Vrms @ G=L9.3Vrms % @ G=L9.1Vrms % @ G=L9.3Vrms % @ G=L
    3Vrms @ G=H3Vrms @ G=H3Vrms @ G=H3Vrms @ G=H
    Gain0db @ G=L-0.2dB @ G=L6dB @ G=L5.8dB @ G=L
    9.5dB @ G=H9.3dB @ G=H15.5dB @ G=H15.3dB @ G=H
    Output power< 0.1Ω< 0.1Ω< 0.2Ω< 0.2Ω
    Output impedance2x 3300mW @ 16Ω, THD+N < 0.1%
    2x 2000mW @ 32Ω, THD+N < 0.1%
    2x 1100mW @ 64Ω, THD+N < 0.1%
    2x 250mW @ 300Ω, THD+N < 0.1%
    2x 9800mW @ 16Ω, THD+N < 0.1%
    2x 6700mW @ 32Ω, THD+N < 0.1%
    2x 4000mW @ 64Ω, THD+N < 0.1%
    2x 1000mW @ 300Ω, THD+N < 0.1%
    2x 500mW @ 600Ω, THD+N < 0.1%
    Load impedance> 8Ω
    Discrete preamplifier performances
    SE Input / SE OutputBAL Input / SE OutputSE Input / BAL OutputBAL Input / BAL Output
    THD+N @ 1kHz (A-Weighting)< 0.000055%< 0.00006%< 0.000055%< 0.00006%
    THD+N @ 20Hz-20kHz (90kBW)< 0.00025%< 0.00025%< 0.00025%< 0.00025%
    SNR @ 1kHz (A-Weighting)141dB137dB145dB138dB
    Dynamic range@ 1kHz (A-Weighting)141dB137dB145dB138dB
    Frequency response20Hz-40kHz (±0.1dB)20Hz-40kHz (±0.1dB)20Hz-40kHz (±0.1dB)20Hz-40kHz (±0.1dB)
    Output level25Vpp25Vpp49Vpp49Vpp
    Measured noise level @ A-Weighting< 0.7µVrms @ G=L< 0.7µVrms @ G=L< 1µVrms @ G=L< 1µVrms @ G=L
    < 1.1µVrms @ G=H< 1.1µVrms @ G=H< 1.8µVrms @ G=H< 1.8µVrms @ G=H
    Actual noise level @ A-Weighting< 0.2µVrms @ G=L< 0.2µVrms @ G=L< 0.7µVrms @ G=L< 0.7µVrms @ G=L
    < 0.6µVrms @ G=H< 0.6µVrms @ G=H< 1.6µVrms @ G=H< 1.6µVrms @ G=H
    Channel crosstalk @ 1kHz-107dB-105dB-116dB-113dB
    Input sensitivity9.1Vrms @ G=L9.3Vrms % @ G=L9.1Vrms % @ G=L9.3Vrms % @ G=L
    3Vrms @ G=H3Vrms @ G=H3Vrms @ G=H3Vrms @ G=H
    Gain0db @ G=L-0.2dB @ G=L6dB @ G=L5.8dB @ G=L
    9.5dB @ G=H9.3dB @ G=H15.5dB @ G=H15.3dB @ G=H
    Load impedance20Ω20Ω20Ω20Ω
    General
    Supply voltage100-240VAC 50/60Hz
    Dimensions222 x 160 x 45mm
    ColorSilver
    Package1x Topping A90 Discrete
    1x Remote control
    1x Powre cable
    1x Male Jack 6.35mm to female Jack 3.5mm adapter
     
    Data sheet
    InputXLR
    InputRCA
    OutputRCA
    OutputJack 6.35mm
    OutputXLR
    OutputJack 4.4mm
    ColorSilver
    ClassClass A / AB
    Remote ControlYes
     
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    Average votes
    4.2 / 5
    5 reviews
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    You can share your feelings about products and help other people by sharing your experience

    Note :
     5/5
    Date :
    Amazing quality
    Very well built and amazing sound
     (1)
     (0)
    This review has been posted for TOPPING A90 DISCRETE Discrete Balanced Headphone Amplifier Preamplifier Silver
    Note :
     5/5
    Date :
    «endgame» comme on dit
    J'ai eu des amplis plus gros, plus «musicaux», mais le rapport qualité/prix/encombrement/puissance de celui-ci est tout simplement exceptionnel. Certes c'est droit, mais personnellement j'estime que c'est à la fin de la chaine de reveler son caractere. J'ai désormais le DAC D90SE + Amp A90D. Avec ça, fini de me dire «est-ce que ça se marie bien avec tel ou tel casque»… Je ne me soucie plus que du caractère du casque! Une seule inconnue dans l'équation que Topping s'est chargé ici de simplifier grandement. Sinon pour la puissance: Audeze LCD2, Hifiman HE6, Sennheiser HD650… rien ne lui résiste.
     (3)
     (0)
    This review has been posted for TOPPING A90 DISCRETE Discrete Balanced Headphone Amplifier Preamplifier Silver
    Note :
     5/5
    Date :
    Excellent preampli à prix modéré. Du fil droit avec du gain
    restitution très neutre.
    la télécommande est un peu capricieuse.
     (6)
     (0)
    This review has been posted for TOPPING A90 DISCRETE Discrete Balanced Headphone Amplifier Preamplifier Silver
    Note :
     5/5
    Date :
    Fantastique !
    Comment peut-on dire que cet ampli casque n'est pas bon ? Non il est fantastique ! D'une droiture et d'une bande passante extraordinaire et d'une neutralité incroyable. Très puissant écouté avec des casques planars de trés haut de gamme,Que ceux qui cherchent un appareil qui "fait" de la musique avec du relief des basses comme ci des aigues comme çà passent leur chemin... C'est un ampli casque avec une connectique pléthorique, une puissance fantastique et une fabrication hors pair. Je ne lis pas les blogueurs mais quand il est bien accompagné : câbles, secteur propre, symétrique du début à la fin, DAC etc et surtout musique ... Je parle de LA MUSIQUE, il est incroyable. Ceci dit on peut aimer ou ne pas aimer Carl Bohm, Furtwamgler ou Baremboîm mais de là à dire qu'ils ne sont pas bons...
    Cet appareil est si précis et exigeant que sa mise en oeuvre pour en obtenir la quintessence demande de l'exigence et il vous fera entrer au plus profond de la musique. Il ne FABRIQUE pas de musique, il JOUE LA MUSIQUE avec plénitude et rigueur.
    C'est un trés bon ampli Casque pour 600€.

    PS : Les critiques du web sont comme les chiens qui pissent aux pieds des lampadaires.
     (4)
     (2)
    This review has been posted for TOPPING A90 DISCRETE Discrete Balanced Headphone Amplifier Preamplifier Silver
    Note :
     1/5
    Date :
    Décevant
    Comme tous les topping très propre et aucune vie aucune émotion musicale, rien. A peine plus de niveau qu’ un simple dx7 pro. Je me suis fait avoir par les influenceurs YouTubers… Passez votre chemin il y a franchement mieux pour moins cher. Très joli design.
     (5)
     (13)
    This review has been posted for TOPPING A90 DISCRETE Discrete Balanced Headphone Amplifier Preamplifier Silver
     
    TOPPING A90 DISCRETE Discrete Balanced Headphone Amplifier Preamplifier Silver
    Topping returns with the A90 Discrete, an improvement of the previous A90, this time equipped with discrete components. Both a headphone amplifier...

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