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TOPPING A70 PRO Headphone Amplifier / Preamp Balanced Volume R2R Silver
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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.
Topping A70 PRO
Headphone Amplifier / Preamplifier 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.
| 1 | Color display screen |
| 2 | Screen nanvigation buttons |
| 3 | XLR 4 Pin output |
| 4 | Jack 4.4mm output |
| 5 | Jack 6.35mm output |
| 6 | Volume control |
| 7 | EXT : Coupling |
| 8 | XLR input |
| 9 | RCA input |
| 10 | RCA output |
| 11 | XLR output |
| 12 | 12V Trigger |
| 13 | FW Port (System UPD) |
| 14 | GND/LIFT Switch |
| 15 | IEC 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.
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.
Powerful performance
The A70 Pro can achieve up to 17000mW of output power while maintaining low distortion.
| POWER COMPARISON | |||
|---|---|---|---|
| Headphones 16 Ohms | Headphones 32 Ohms | Headphones 300 Ohms | |
| Output | 2x 17000mW | 2x 10000mW | 2x 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.
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.
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.
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.
Technical characteristics
| SpEcifications | |
|---|---|
| Product type | Headphone amplifier / preamp |
| Inputs | 1x RCA Stereo 1x XLR Stereo balanced |
| Outputs | 1x 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 OUT | BAL 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 dB | 140 dB | 147 dB | 142 dB |
| Dynamic range | 143 dB | 140 dB | 147 dB | 142 dB |
| Frequency response | 20Hz - 40Khz (+/-0.05dB) | 20Hz - 40Khz (+/-0.01dB) | 20Hz - 40Khz (+/-0.05dB) | 20Hz - 40Khz (+/-0.01dB) |
| Output level | 28Vpp @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 sensitivity | 10.3Vrms @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 |
| Gain | 0dB @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 power | 6000mW 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 OUT | BAL 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 dB | 140 dB | 147 dB | 142 dB |
| Dynamic range | 143 dB | 140 dB | 147 dB | 142 dB |
| Frequency response | 20Hz - 40Khz (+/-0.05dB) | 20Hz - 40Khz (+/-0.01dB) | 20Hz - 40Khz (+/-0.05dB) | 20Hz - 40Khz (+/-0.01dB) |
| Output level | 28Vpp @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 sensitivity | 10.3Vrms @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 |
| Gain | 0dB @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 | 50 Ohm | 50 Ohm | 100 Ohm | 100 Ohm |
| general | |
|---|---|
| Housing material | Aluminium |
| Dimensions | 222 x 176 x 48 mm |
| Color | Silver |
| Package | 1x Topping A70 Pro 1x Power cable 1x IR remote control 1x 6.35mm to 3.5mm jack adapter 1x Manual 1x Warranty card |
| Input | RCA |
| Input | XLR |
| Output | RCA |
| Output | Jack 6.35mm |
| Output | XLR |
| Output | Jack 4.4mm |
| Color | Silver |
| Class | N/A |
| Remote Control | Yes |
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