KGUSS Topping A70Pro Fully Balanced Headphone Amplifier Preamp User Manual
- June 14, 2024
- KGUSS
Table of Contents
KGUSS Topping A70Pro Fully Balanced Headphone Amplifier Preamp
T’ang-ku-la Module
- Tang-ku-la means a mountain that an eagle cannot fly over, the source of the Yangtze River.
- It symbolizes our spirit of climbing the peak and the ultimate performance of T’ang-ku-la module.
- The Tang-ku-la Module uses a new three-stage feedback circuit.
- Further reducing noise and high frequency distortion, making the dynamic range rise to an unmatched 147dB new realm.
- The new technology greatly reduces heat generation, thus greatly improving reliability, extending electronic component life, and reducing thermal noise.
Re-optimized new circuit architecture
- Newly developed ultra-low noise input stage further improved the noise performance of balanced input and increased the input impedance to 20k thus having better compatibility with incoming devices.
- The gain architecture has also been redesigned to further reduce noise and distortion at high gain states than the previous architecture.
Ground Loop Noise Disappearing magic
- When multiple devices are used in combination, ground loop noise may be encountered.
- A70 Pro adds a GND/LIFT switch, when ground loop noise is encountered switch to LIFT and the noise will disappear.
Aurora UI DULLEST bring new experience
- Full color screen and three touch buttons Experience has changed since.
Colors Jump out at you
- The display of the playback information, FFT, VU can be switched according to your requirements.
- Cusotmized functions are available by pressing the volume knob.
Relay volume control
- A70 Pro uses relays and resistor networks to form R2R volume control module, which providing precise volume control, long service life, and will not deviate even at low volume.
Independent volume memory
- The A70 Pro can memorize 8 sets of volume separately and automatically revert to the last used volume the next time the output is selected.
*The 8 groups are headphone amp + preamp output, earphone all output, preamp all output, only 6. 35mm output, only 4. 4mm output, XLR output, RCA output and XLR output.
- Press and hold the C1/C2 button on the remote control for 3 seconds to save the current status (Includes input channels, output channels, volume levels, and all settings in the setup menu), After successfully saving, press C1/C2 to use the corresponding settings.
Low noise is a perseverance
- Actual noise level of A70 Pro <0.2uVrms @G=L, <0.8uVrms @G=H Excellent performance at both high and low gain.
- At an output voltage of 50mV, the A70 Pro achieves a far superior dynamic range of 106.3dB.
Unprecedented high power Vanishingly low distortion with load
- 17000mW of powerful output while still maintaining low distortion.
Expandable inputs
- The A70 Pro has one set of balanced XLR and one set of single-ended RCA inputs.
- But with the Ext90 input expansion, you get a total of four balanced XLR and two single-ended RCA inputs.
A Headphone Amp, also a Preamp
The A70 Pro drives headphones well, and it can also be used as a preamp. It has the same high performance as the headphone amp mode, with an RCA output impedance of only 500 and an XLR output impedance of only 1002, allowing it to be used with a wide range of input impedance for various power amplifiers. In addition, a full-featured remote control makes operation even easier.
12V Trigger
- A70 Pro has 12 Trigger input and output interface, which supports being triggered by other devices to switch on and off, and also supports actively triggering other devices to switch on and off synchronously.
Best match— D70 Pro SABRE
- A70 Pro and D70 Pro SABRE have identical design languages and can meet the needs of the vast majority of headphones and active speakers.
- The A70 Pro and D70 Pro SABRE can be switched on and off in conjunction via the 12V Trigger connector, allowing the A70 Pro to be synchronized with the D70 Pro SABRE for automatic or manual switching.
Contents list
SPECIFICATIONS
A70 Pro Headphone Amplifier specifications
*Note: The actual noise level is obtained by boosting the noise of A70 Pro by 40d using a low noise amplifier in front of the APx555B then dividing the measured noise by 100 times.
*Note: The actual noise level is obtained by boosting the noise of A70 Pro by 40d using a low noise amplifier in front of the APx555B then dividing the measured noise by 100 times.
