TOPPING A90 Balanced Headphone amplifier / Preamplifier Black

TOPPING A90 Amplificateur casque
A real hammer blow in the headphone amplifier market, the A90 from Topping is a compact unit with exceptional performance.

Average votes for this product
4.6 / 5

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Reference : 14550
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415,83 €tax excl.

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Shipping date: 14-08-2020.

Orders placed before 11AM (GMT+1) will be shipped the same day (working day).

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Topping A90

Headphone amplifier / preamplifier XLR / RCA




Topping challenges the whole market of headphone amplifiers with its A90 : an exceptional performance desktop headphone amplifier / preamplifier. With a SINAD up to 123dB (measured by Audio Science Review) on its balanced output and an incredibly low distortion of 0.000086%, the A90 significantly expands the boundaries of what most advanced home audio equipment can offer.


Review by Audio Science Review

...at the distortion and noise levels we are seeing here, you are seeing absolute transparency to the source.

 test by the measurement forum Audio Science Review

Balanced & single-ended connectivity


Topping A90 has a stereo balanced input XLR 3-pole and an single-ended input stereo RCA connector on its rear face . It offers a balanced (XLR) / single--ended (RCA) as preamplified output.

The connectors dedicated to the headphone amplifier are located on the front panel. A90 has all the connections necessary to easily connect headphones / IEM with various characteristics and requirements: a balanced output on XLR 4-pole connector, a second balanced output on jack TRRS 4.4mm connector  Balanced headphone outputs are capable of delivering a power of 250mW and have an output impedance of 0135 Ω.

Finally tthe frontpanel offers an unbalanced output on 6.35mm connector with a power output of 125mW.

Volume control, source selection / outputs


The preamplifier / headphone amplifier A90 provides a volume control through a rotary knob directly accessible from its facade.

On its front side, three selectors allow easy control of all the device functions to immediately find the best configuration for your setup.

A first selector allows selecting the output mode and can switch between preamplifier mode and headset amplifier mode. These two modes can not be active simultaneously. This switch is also used to turn off the device.

A second bipolar selector serves as source selection and allows the user to select between balanced and single-ended input. It is therefore possible to connect two separate devices on each of these inputs and use the A90 as simple source selector.

The last selector is a gain control with three levels (low gain / medium gain / high gain) to get the best performance according to your sources and the type of headphones used.

Specifications
TypeHeadphone amplifier
Preamplifier
Inputs3-pole XLR balanced stereo
RCA single-ended stereo
Outputs3-pole XLR balanced stereo
RCA single-ended stereo
XLR 4-pole balanced
Jack TRRS 4.4mm balanced
Jack 6.35mm single-ended
Power supply

Integrated (SMPS)

Power cable included

Output impedance 0.135Ω (balanced)
ColorBlack



Front panel

A90 Panneau avant connectique
1Power LED
2Output mode switch
3Input switch
4Gain switch
5Balanced headphone output (XLR)
6Balanced headphone output (Jack 4.4mm)
7Headphone output 6.35mm
8Volume knob



Back panel

A90 Panneau avant connectique
1Analog input XLR (R)
2Analog input XLR (L)
3Analog input RCA (L)
4Analog input RCA (R)
5Analog output XLR (R)
6Analog output XLR (L)
7Analog output RCA (L)
8Analog output RCA (R)
9Power input
10Fuse
11Power switch



Headphone amplifier specs
Single-ended Input & Single-ended OutputBalanced Input & Single-ended OutputSingle-ended Input & Balanced OutputBalanced Input & Balanced Output
THD+N @ 1kHz (A-weighted)<0.00007% @ 500mW (32Ω)
<0.00006% @ 80mW (300Ω)
<0.00009% @ 500mW (32Ω)
<0.00006% @ 80mW (300Ω)
<0.00007% @ 2000mW (32Ω)
<0.00006% @ 320mW (300Ω)
<0.00009% @ 2000mW (32Ω)
<0.00006% @ 320mW (300Ω)
THD+N @ 20-20kHz 90kBW<0.00004% @ 500mW (32Ω)
<0.00001% @ 80mW (300Ω)
<0.00004% @ 2000mW (32Ω)
<0.00001% @ 320mW (300Ω)
SNR @ Max Out 1kHz (A-weighted)141dB137dB145dB138dB
Dynamic range @ Max Out 1kHz (A-weighted)141dB137dB145dB138dB
Frequency Response20Hz-40kHz (±0.05dB)20Hz-40kHz (±0.01dB)20Hz-40kHz (±0.05dB)20Hz-40kHz (±0.01dB)
Output level9Vpp @ Gain = low
25Vpp @Gain = medium
25Vpp @Gain = high
18Vpp @ Gain = low
49Vpp @Gain = medium
49Vpp @Gain = high
Noise level (Audio Precision / A-weighted)<0.7uVrms @ Gain = low
<0.7uVrms @ Gain = medium
<0.9uVrms @ Gain = high
<0.9uVrms @ Gain = low
<0.9uVrms @ Gain = medium
<1.4uVrms @ Gain = high
Noise level (Extrapolation / A-weighted)<0.2uVrms @ Gain = low
<0.2uVrms @ Gain = medium
<0.6uVrms @ Gain = high
<0.6uVrms @ Gain = low
<0.6uVrms @ Gain = medium
<1.3uVrms @ Gain = high
Crosstalk @ 1kHz-106dB-102dB-105dB
IMD CCIF @ 18kHz +19kHz-118dB
IMD SMPTE @ 60Hz +7kHz-110dB @ SMPTE4 : 1
-115dB @ SMPTE1 : 1
Input sensitivity9.5Vrms @ Gain = low
8.8Vrms @ Gain = medium
2.9Vrms @ Gain = high
Gain-9.5dB @ Gain = low
0dB @ Gain = medium
9.5dB @ Gain = high
-3.5dB @ Gain = low
6dB @ Gain = medium
15.5dB @ Gain = high
Output impedance<0.1Ω<0.2Ω
Output power3300mW 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%
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>8Ω



Preamplifier specs
Single-ended Input & Single-ended OutputBalanced Input & Single-ended OutputSingle-ended Input & Balanced OutputBalanced Input & Balanced Output
THD+N @ 1kHz (A-weighted)<0.00006%
THD+N @ 20-20kHz 90kBW<0.0001%
SNR @ Max Out 1kHz (A-weighted)141dB137dB145dB138dB
Plage dynamique @ Max Out 1kHz (A-weighted)141dB137dB145dB138dB
Frequency Response20Hz-40kHz (±0.05dB)20Hz-40kHz (±0.01dB)20Hz-40kHz (±0.05dB)20Hz-40kHz (±0.01dB)
Output level9Vpp @ Gain = bas
25Vpp @Gain = moyen
25Vpp @Gain = haut
18Vpp @ Gain = bas
49Vpp @Gain = moyen
49Vpp @Gain = haut
Noise level (Audio Precision / A-weighted)<0.7uVrms @ Gain = bas
<0.7uVrms @ Gain = moyen
<0.9uVrms @ Gain = haut
<0.9uVrms @ Gain = bas
<0.9uVrms @ Gain = moyen
<1.4uVrms @ Gain = haut
Noise level (Extrapolation / A-weighted)<0.2uVrms @ Gain = bas
<0.2uVrms @ Gain = moyen
<0.6uVrms @ Gain = haut
<0.6uVrms @ Gain = bas
<0.6uVrms @ Gain = moyen
<1.3uVrms @ Gain = haut
Crosstalk @ 1kHz-106dB-102dB-105dB-102dB
IMD CCIF @ 18kHz +19kHz-118dB
IMD SMPTE @ 60Hz +7kHz-110dB @ SMPTE4 : 1
-115dB @ SMPTE1 : 1
Input sensitivity9.5Vrms @ Gain = bas
8.8Vrms @ Gain = moyen
2.9Vrms @ Gain = haut
Gain-9.5dB @ Gain = bas
0dB @ Gain = moyen
9.5dB @ Gain = haut
-3.5dB @ Gain = bas
6dB @ Gain = moyen
15.5dB @ Gain = haut
Output impedance20Ω40Ω
 
Data sheet
InputXLR
InputRCA
OutputXLR
OutputJack 3.5mm
OutputJack 2.5mm
OutputRCA
ColorBlack
 
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Average votes
4.6 / 5
5 reviews
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Note :
 4/5
Date :
Très bon amplificateur
J'utilise cet ampli couplé à un ampli DAC de la marque FX-Audio relié en connectique RCA.
La 1ère chose qui frappe, c'est le bruit de fond lorsque l'on ne joue aucun son quelque soit le gain (volume du DAC et de l'ampli à fond).
Rien, il n'y a rien. Le seul souffle que l'on entend, c'est celui inhérents aux enregistrements (classique par exemple).
Ce n'est clairement pas un ampli chaleureux dans le sens où il n'y a aucune coloration sonore. Pas de basses "boomy".
Juste les fréquences sonores là où elles sont censées être.

Le bloc est assez compact et pesant à la fois.
Le volume de mon unité est super fluide sans aucun accoup auquel il manque la télécommande pour être parfait.
Il n'a aucun problème pour alimenter mon Focal Elegia pas trop demandant au gain medium.
Ce dernier est branché sur la sortie jack asymétrique et le sera bientôt en asymétrique Jack 4.4 pour plus de jus et aucun parasite possible.
Concernant mon AKG K701, il est nécessaire de pousser le gain au maximum sur la sortie asymétrique.
Et sur du classique, il faut pousser le volume à plus de midi ce qui ne laisse pas beaucoup de marge.

J'ai enlevé une étoile car il y a un problème de conception avec le fusible qui saute si vous prenez l'habitude d'allumer/éteindre l'unité avec le bouton à l'arrière.
Sans ce souci, je lui aurais bien mis le maximum.
 (0)
 (0)
This review has been posted for TOPPING A90 Balanced Headphone amplifier / Preamplifier Black
Note :
 5/5
Date :
Amazing
Renowned Topping build quality, fantastic performance, nice volume wheel. Only slight negative: if connected both xlr and rca in, and playing music via both, music through xlr is still ever so slightly audible when switching to rca and listining to very sensitive IEMs with the volume all the way down on low gain. But for the price can't imagine a better solid state amplifier at the moment.
 (1)
 (0)
This review has been posted for TOPPING A90 Balanced Headphone amplifier / Preamplifier Black
Note :
 4/5
Date :
Topping A90
Well-made and compact. Switches have a solid ‘click’ feel. Volume knob is a little shallow in depth and easy to move. Very clean sound with totally silent background.

The power gives my hard to drive headphones (set to ‘Hi’ at 12 O’clock on the dial) a feeling of ease of being driven and more detail. The extra detail was more than I expected.

A90 bought for Bedroom use and initially bought the Topping DX7Pro; good DAC yet I felt struggled with my headphones. Adding the A90 was the answer. DX7Pro as DAC + A90 and amp provides great sound quality and betters my main system which is 8x the price (main system has better DAC yet the combo overall is better). The A90 made the DX7Pro sound better as a DAC I perceived!? (assume a power supply thing!) Also bought the Topping RCA short cables, good value for money and well made. I heard zero differance between RCA and XLR.

4 Stars only as the first unit was supplied ‘dead on arrival’; that said merci beaucoup Audiophonics.fr for the fuss free return and replacement.
 (2)
 (0)
This review has been posted for TOPPING A90 Balanced Headphone amplifier / Preamplifier Black
Note :
 5/5
Date :
Affordable end-game
This is a seriously beefy amp that offers performance of many times more expensive amps. I don't have a matching DAC yet (still using a cheap one) but I believe the increase in power offers a bit more dynamic range and slightly cleaner sound. So in essence it sounds like an amp should sound. Neutral, powerful, dynamic.
 (2)
 (0)
This review has been posted for TOPPING A90 Balanced Headphone amplifier / Preamplifier Black
Note :
 5/5
Date :
Best amplifier I've had the pleasure of owning
This is Topping's statement amplifier as a response to the THX AAA amps like the 789 and the 887. On high gain, the A90 is as clean as those but more powerful. On low and medium gain, it is a lot cleaner than the THX ones, essentially beating the $3000 Benchmark HPA4. This is a BARGAIN. I also really like the smooth, big knob. It's perfect :)

About the sound. You can push any headphone without any distortion, especially the bass is really impressive. I use low gain for IEMs and low gain maxed, or medium gain, for dynamic and planar headphones. The sound is sublime, I can't fault it in any way.

Tech wise, it is based on a common texas instruments amplifier, but with composite feedback that essentially nullifies practically any and all distortion. It sounds simple but no one has achieved this performance so far, especially at this price.

Finally, it supports SE in SE out, SE in BAL out, BAL in SE out, BAL in BAL out. The power is internal, it has two separate power supplies for each channel, again really impressive considering the price point of this amplifier. This gives the unit some heft, as well as saving you from any bulky supplies in the power outlet.
 (5)
 (0)
This review has been posted for TOPPING A90 Balanced Headphone amplifier / Preamplifier Black
 
TOPPING A90 Balanced Headphone amplifier / Preamplifier Black
A real hammer blow in the headphone amplifier market, the A90 from Topping is a compact unit with exceptional performance.

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