TOPPING A70 PRO Headphone Amplifier / Preamp Balanced Volume R2R Silver

TOPPING A70 PRO Headphone Amplifier / Preamp Balanced Volume R2R Silver
The Topping A70 PRO is an efficient and affordable headphone amplifier. Its careful design makes it an ideal ally for any audiophile wishing to enjoy a rich and clear headphone listening. The amplifier is Hi-Res certified, a label guaranteeing a very good quality of sound reproduction.

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Reference : 17730
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499,00 €tax incl.

415,83 € tax excl.

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Shipping date: 21-02-2024.

Orders placed before 12h (GMT+1) will generally be shipped the same day (working day).

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Accessories for this product

Find here a selection of useful and/or essential accessories for this product. These are specially selected by the Audiophonics team according to the characteristics of the product.

 
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Topping A70 PRO

Headphone Amplifier / Preamplifier Volume R2R SilverTOPPING A70 PRO Amplificateur Casque / Pré-amplificateur Symétrique Volume R2R Silver

The Topping A70 PRO is an efficient and affordable headphone amplifier. Its careful design makes it an ideal ally for any audiophile wishing to enjoy a rich and clear headphone listening. The amplifier is Hi-Res certified, a label guaranteeing a very good quality of sound reproduction.

Expandables balanced / unbalanced inputs

The A70 PRO is both simple and very efficient. It integrates a balanced XLR set and a stereo RCA set but with the possibility of coupling the A70PRO with an Ext90 you can obtain a total of 4 balanced XLR inputs and 2 RCA inputs. On the output side, three connectors are available; a balanced 4.4mm jack output, a 6.35 jack output and a 4 pin XLR output. For the preamplifier function, there is also an RCA output and an XLR output.

TOPPING A70 PRO Amplificateur Casque / Pré-amplificateur Symétrique Volume R2R Silver
1Color display screen
2Screen nanvigation buttons
3XLR 4 Pin output
4Jack 4.4mm output
5Jack 6.35mm output
6Volume control
7EXT : Coupling
8XLR input
9RCA input
10RCA output
11XLR output
1212V Trigger 
13FW Port  (System UPD)
14GND/LIFT Switch
15IEC socket / power button

T'ang-ku-la module

The A70 Pro offers superior amplification with its new T'ang-ku-la module. This module adopts a new three-stage feedback circuit that dramatically reduces high-frequency noise and distortion. This new technology also reduces heat generation, which greatly improves reliability and extends the life of electronic components. 

TOPPING A70 PRO Amplificateur Casque / Pré-amplificateur Symétrique Volume R2R Silver
TOPPING A70 PRO Amplificateur Casque / Pré-amplificateur Symétrique Volume R2R Silver

A new circuit architecture

Topping with the A70 Pro has developed an ultra low noise input stage. This dramatically improves the noise level on the balanced output and pushes the output impedance up to 20K Ohms for optimal compatibility with all types of devices.

The gain architecture has also been redesigned to reduce noise and distortion at high gain.

A headphone amplifier with pre-amp function

This headphone amplifier can also be used as a pre-amp. It also has high performance as a pre-amp with an output impedance of 50 Ohms on RCA and 100 Ohms on XLR. This allows the A70 Pro to be coupled to many power amps.

TOPPING A70 PRO Amplificateur Casque / Pré-amplificateur Symétrique Volume R2R Silver

Powerful performance

The A70 Pro can achieve up to 17000mW of output power while maintaining low distortion.

POWER COMPARISON
Headphones 16 OhmsHeadphones 32 OhmsHeadphones 300 Ohms
Output2x 17000mW2x 10000mW2x 1200mW
THD+N<0.0001%<0.00009%<0.00009%

Disappearance of ground loop noise

When several devices are used simultaneously in combination it can cause some noise. With the A70 Pro you can now make this noise disappear thanks to a GND/LIFT button on the back of the unit. You just have to switch it on LIFT and the noise will disappear. 

TOPPING A70 PRO Amplificateur Casque / Pré-amplificateur Symétrique Volume R2R Silver

12V trigger option

This function allows the A70 PRO to be controlled or to control other devices in order to turn on and off simultaneously. 

TOPPING A70 PRO Amplificateur Casque / Pré-amplificateur Symétrique Volume R2R Silver

R2R Volume Control

The volume control of the Topping A70 Pro is built on a resistive matrix (R2R), which ensures long life, precise adjustment and maintains dynamics at low signal levels.

TOPPING A70 PRO Amplificateur Casque / Pré-amplificateur Symétrique Volume R2R Silver

Brand new color display

A new color display is integrated in the A70 Pro along with 3 buttons for a better experience. Moreover this screen can display some information (FTT and VU) according to your needs and desires.

TOPPING A70 PRO Amplificateur Casque / Pré-amplificateur Symétrique Volume R2R Silver

Technical characteristics

SpEcifications
Product typeHeadphone amplifier / preamp
Inputs1x RCA Stereo
1x XLR Stereo balanced
Outputs1x RCA Stereo
1x XLR Stereo balanced

1x XRL 4 pins
1x Headphone output 4.4mm balanced
1x Headphone output 6.35mm unbalanced

HEADPHONE AMPLIFIER MEASUREMENTS
SE IN / SE OUTBAL IN / SE OUT SE IN / BAL OUT BAL IN / BAL OUT
THD+N @1Khz (A-weighted)<0.000065% @ output =500mW 32 Ohms

<0.000055% @ output =80mW 300 Ohms
<0.000065% @ output =500mW 32 Ohms

<0.000055% @ output =80mW 300 Ohms
<0.000065% @ output =500mW 32 Ohms

<0.000055% @ output =80mW 300 Ohms
<0.000065% @ output =500mW 32 Ohms

<0.000055% @ output =80mW 300 Ohms
THD @ 20-20Khz (90kBW)<0.00006% @ output =500mW 32 Ohms

<0.00005% @ output =80mW 300 Ohms
<0.00006% @ output =500mW 32 Ohms

<0.00005% @ output =80mW 300 Ohms
<0.00006% @ output =500mW 32 Ohms

<0.00005% @ output =80mW 300 Ohms
<0.00006% @ output =500mW 32 Ohms

<0.00005% @ output =80mW 300 Ohms
SNR @ MAX OUT 1Khz (A-weighted)143 dB140 dB147 dB142 dB
Dynamic range143 dB140 dB147 dB142 dB
Frequency response20Hz - 40Khz (+/-0.05dB)20Hz - 40Khz (+/-0.01dB)20Hz - 40Khz (+/-0.05dB)20Hz - 40Khz (+/-0.01dB)
Output level28Vpp @G=L
27.6Vpp @G=H
27.2Vpp @G=L
27.6Vpp @G=H
56Vpp @G=L
54Vpp @G=H
54Vpp @G=L
54Vpp @G=H
AP noise level measurement (A-weighted)<0.7uVrms @G=L
<1.0uVrms @G=H
<0.7uVrms @G=L
<1.0uVrms @G=H
<0.9uVrms @G=L
<1.9uVrms @G=H
<0.9uVrms @G=L
<1.9uVrms @G=H
Effective noise level (A-weighted)<0.2uVrms @G=L
<0.8uVrms @G=H
<0.2uVrms @G=L
<0.8uVrms @G=H
<0.6uVrms @G=L
<1.8uVrms @G=H
<0.6uVrms @G=L
<1.8uVrms @G=H
Channel separation @ 1kHz-123dB-124dB-122dB-133dB
Output sensitivity10.3Vrms @G=L
2.0Vrms @G=H
9.8Vrms @G=L
2.0Vrms @G=H
10.3Vrms @G=L
2.0Vrms @G=H
9.8Vrms @G=L
2.0Vrms @G=H
Gain0dB @G=L
13.8dB @G=H
0dB @G=L
13.9dB @G=H
6dB @G=L
19.8dB @G=H
6dB @G=L
19.9dB @G=H
Output impedance< 0.1 Ohm< 0.1 Ohm< 0.2 Ohm< 0.2 Ohm
Output power6000mW x 2 @16 Ohms THD+N<0.1%
3000mW x 2 @32 Ohms THD+N<0.1%
1550mW x 2 @64 Ohms THD+N<0.1%
330mW x 2 @300 Ohms THD+N<0.1%
165mW x 2 @600 Ohms THD+N<0.1%
17000mW x 2 @16 Ohms THD+N<0.1%
12600mW x 2 @32 Ohms THD+N<0.1%
6000mW x 2 @64 Ohms THD+N<0.1%
1370mW x 2 @300 Ohms THD+N<0.1%
670mW x 2 @600 Ohms THD+N<0.1%
Load impedance< 8 Ohm
PREAMPLIFIER MEASUREMENTS
SE IN / SE OUTBAL IN / SE OUT SE IN / BAL OUT BAL IN / BAL OUT
THD+N @1Khz (A-weighted)<0.000055%<0.000055%<0.000055%<0.000055%
THD @ 20-20Khz (90kBW)<0.00005% <0.00005%<0.00005%<0.00005%
SNR @ MAX OUT 1Khz (A-weighted)143 dB140 dB147 dB142 dB
Dynamic range143 dB140 dB147 dB142 dB
Frequency response20Hz - 40Khz (+/-0.05dB)20Hz - 40Khz (+/-0.01dB)20Hz - 40Khz (+/-0.05dB)20Hz - 40Khz (+/-0.01dB)
Output level28Vpp @G=L
27.6Vpp @G=H
27.2Vpp @G=L
27.6Vpp @G=H
56Vpp @G=L
54Vpp @G=H
54Vpp @G=L
54Vpp @G=H
AP noise level measurement (A-weighted)<0.7uVrms @G=L
<1.0uVrms @G=H
<0.7uVrms @G=L
<1.0uVrms @G=H
<0.9uVrms @G=L
<1.9uVrms @G=H
<0.9uVrms @G=L
<1.9uVrms @G=H
Effective noise level (A-weighted)<0.2uVrms @G=L
<0.8uVrms @G=H
<0.2uVrms @G=L
<0.8uVrms @G=H
<0.6uVrms @G=L
<1.8uVrms @G=H
<0.6uVrms @G=L
<1.8uVrms @G=H
Channel separation @ 1kHz-119dB-123dB-118dB-125dB
Output sensitivity10.3Vrms @G=L
2.0Vrms @G=H
9.8Vrms @G=L
2.0Vrms @G=H
10.3Vrms @G=L
2.0Vrms @G=H
9.8Vrms @G=L
2.0Vrms @G=H
Gain0dB @G=L
13.8dB @G=H
0dB @G=L
13.9dB @G=H
6dB @G=L
19.8dB @G=H
6dB @G=L
19.9dB @G=H
Output impedance50 Ohm50 Ohm100 Ohm100 Ohm
general
Housing materialAluminium
Dimensions222 x 176 x 48 mm
ColorSilver
Package1x Topping A70 Pro
1x Power cable
1x IR remote control
1x 6.35mm to 3.5mm jack adapter
1x Manual
1x Warranty card
TOPPING A70 PRO Amplificateur Casque / Pré-amplificateur Symétrique Volume R2R Silver
 
Data sheet
InputXLR
InputRCA
OutputXLR
OutputJack 4.4mm
OutputRCA
OutputJack 6.35mm
ColorSilver
ClassN/A
Remote ControlYes
 
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TOPPING A70 PRO Headphone Amplifier / Preamp Balanced Volume R2R Silver
The Topping A70 PRO is an efficient and affordable headphone amplifier. Its careful design makes it an ideal ally for any audiophile wishing to...

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