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TOPPING DX9 DISCRETE Balanced Discrete R2R DAC Headphone Amplifier NFCA Silver
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Topping DX9 Discrete Balanced Discrete R2R DAC Headphone Amplifier NFCA Bluetooth 5.1 32bit 768kHz DSD512 Silver
The Topping DX9 Discrete is an R2R DAC / headphone amplifier with even better performance than its predecessor, the DX9, which was based on AKM technology. the DX9 Discrete is based on a balanced PSRM circuit with 16 elements per channel combined with R2R resistor networks, as well as an AK4118 optical receiver chip and an XMOS XU-316 USB interface, enabling it to support high-resolution sampling rates up to PCM 32bit 768kHz and DSD512. The circuit is complemented by Altera MAX II CPLD, a high-precision clock, relay volume control, and a 6-channel NFCA amplification circuit for unmatched performance and power.
The DX9 Discrete delivers up to 2x 7080mW into a 32 ohms load via its headphone outputs. Added to this is a QCC5125 Bluetooth receiver chip supporting aptX, aptX Adaptive, aptX HD, and LDAC codecs. In terms of aesthetics, it retains the appearance of its predecessor with a curved case with a transparent top plate and dual color screens featuring the Aurora UI interface. In terms of connectivity, it is not to be outdone with a full range of digital inputs, a set of RCA/XLR line outputs, and a set of RCA/XLR preamplified outputs.
Topping DX9 Discrete: PSMR + R2R hybrid DAC
The Topping DX9 Discrete DAC features the brand's proprietary 1-bit PSRM technology combined with R2R resistor networks for high-precision decoding. Topping's PSRM technology allows the R2R to process a 1-bit signal for even greater stability, less noise, and very high dynamics. This hybrid R2R + 1-bit modulation technology enables the DX9 Discrete to offer an SNR of 131dB.
Topping DX9 Discrete: Audiophile components
The entire structure of the DX9 Discrete is made up of high-quality, audiophile components. It features a USB-XMOS XU316 interface and an AK4118 optical interface coupled with an Altera MAX II CPLD, enabling it to support high-resolution sampling rates up to PCM 32bit 768 kHz and DSD512 while eliminating jitter to achieve a rate of -160dB.
Topping DX9 Discrete: Volume control via relay system
Within the DX9 Discrete, volume is managed in balanced way using relay and resistor networks for high-precision rendering. Combined with digital volume control, this achieves lower distortion levels and greater noise immunity, preserving sound reproduction for clear, purer rendering.
Topping DX9 Discrete: A high-performance headphone amplifier
The headphone amplification is based on a balanced NFCA circuit and benefits from crossfeed functionality. The amplification circuit to the unbalanced connector and the circuit to the balanced connector are completely independent in order to preserve the signal from any distortion and to be able to deliver high power. The balanced headphone output is capable of delivering up to 2x7080mW under a 32 ohm load (THD+N < 1%). In addition, the crossfeed function simulates the HRTF function for improved spatialization, with greater depth and less channel separation.
Topping DX9 Discrete: Bluetooth aptX LDAC
The DX9 Discrete features Bluetooth 5.1 functionality thanks to a Qualcomm QCC5125 chip, enabling it to support SBC, AAC, aptX, aptX HD, aptX Adaptive, and LDAC codecs for reliable and stable wireless transmission.
Topping DX9 Discrete: 10-band EQ
To give you complete control over the tone of the sound reproduction, Topping has developed its own 10-band PEQ (parametric equalizer), allowing you to set the frequency response, gain, and bandwidth using the Topping Tune Windows application. The software supports the import of target curves and original curves, as well as curve compensation using target curves. You can also save multiple profiles and switch between them easily.
Topping DX9 Discrete: Refined aesthetics and ergonomics
The rounded curves of the DX9 Discrete give it a unique aesthetic. Combined with two color screens and its Aurora UI interface, the user experience is exceptional. To top it all off, a transparent plate on the top of the device allows you to see its internal circuitry.
Topping DX9 Discrete overview
| 1 | Power button |
| 2 | Dual display |
| 3 | Multifunction button |
| 4 | Single-ended 6.35mm jack headphone output |
| 5 | Balanced 4.4mm jack headphone output |
| 6 | Balanced 4-pin XLR headphone output |
| 7 | Balanced XLR stereo pre-out |
| 8 | Single-ended RCA stereo pre-out |
| 9 | Single-ended RCA stereo line output |
| 10 | Balanced XLR stereo line output |
| 11 | I2S input via HDMI |
| 12 | 2x Toslink optical inputs |
| 13 | 2x Coaxial inputs |
| 14 | Bluetooth antenna |
| 15 | USB-B input |
| 16 | AES/EBU input |
| 17 | Trigger 12V |
| 18 | IEC power supply / Fuse / Power switch |
Technical characteristics
| Specifications | |
|---|---|
| Product type | DAC Headphone amplifier |
| Inputs | 1x USB-B 2x Coaxial 2x Toslink optical 1x AES/EBU 1x I2S via HDMI Bluetooth |
| Outputs | 1x Balanced XLR stereo line output 1x Single-ended RCA stereo line output 1x Balanced XLR stereo pre-out 1x Single-ended RCA stereo pre-out 1x Single-ended 6.35mm headphone jack output 1x Balanced 4.4mm headphone jack output 1x Balanced 4-pin XLR headphone output |
| DAC | 1-bit PSRM circuit + R2R |
| Optical interface | AK4118 |
| USB interface | XMOS XU316 |
| Supported sample rates | PCM jusqu'à 32bit 768kHz DSD jusqu'à DSD512 |
| Bluetooth compatible codecs | SBC, AAC, aptX, aptX HD, aptX Adaptive, LDAC |
| 12V trigger | |
| DX9 Discrete DAC (Line Output / USB Source @ 96kHz) | |
|---|---|
| THD+N @ 1kHz (A-wt) | RCA : < 0.00007% XLR : < 0.00006% |
| THD @ 20-20kHz 90kBw | RCA : < 0.0004% XLR : < 0.0003% |
| SNR @ 1kHz (A-wt) | RCA : 128dB XLR : 131dB |
| Dynamic range | RCA : 128dB XLR : 131dB |
| Frequency response | RCA : 20HZ-20kHz (+/-0.6dB) 20Hz-40kHz (+/-2.0dB) XLR : 20HZ-20kHz (+/-0.6dB) 20Hz-40kHz (+/-2.0dB) |
| Output level | RCA : 2.5Vrms @ 0dBFS XLR : 5.2Vrms @ 0dBFS |
| Noise (A-wt) | RCA : < 1.1uVrms XLR : < 1.6uVrms |
| Channel crosstalk | RCA : -125dB @ 1kHz XLR : -136dB @ 1kHz |
| Channel balance | RCA : 0.3dB XLR : 0.3dB |
| Output impedance | RCA : 0.3dB XLR : 0.3dB |
| Supported sample rates | RCA : 50 ohms XLR : 100 ohms |
| DX9 Preamplifier (USB Source @96kHz) | |
|---|---|
| THD+N @ 1kHz (A-wt) | RCA : < 0.00007% XLR : < 0.00007% |
| THD @ 20-20kHz 45kBw | RCA : < 0.0004% XLR : < 0.0003% |
| SNR @ Max out 1kHz (A-wt) | RCA : 130dB @ 1kHz XLR : 131dB @ 1kHz |
| Dynamic range | RCA : 130dB @ 1kHz XLR : 131dB @ 1kHz |
| Frequency response | RCA : 20Hz-20kHz (+/-0.6dB) / 20Hz-40kHz (+/-2.0dB) XLR : 20Hz-20kHz (+/-0.6dB) / 20Hz-40kHz (+/-2.0dB) |
| Output level | RCA : 15Vpp @ G=L / 24Vpp @ G=H XLR : 15Vpp @ G=L / 48Vpp @ G=H |
| Measured noise level AP (A-weighted) | RCA : < 1.7uVrms @ G=L < 2.0uVrms @ G=H XLR : < 0.8uVrms @ G=L < 2.1uVrms @ G=H |
| Effective noise level (A-weighted) | RCA : < 1.1uVrms @ G=L < 1.4uVrms @ G=H XLR : < 0.5uVrms @ G=L < 2.1uVrms @ G=H |
| Channel crosstalk | RCA : -113dB @ 1Khz XLR : -135dB @ 1kHz |
| Gain | RCA : G=L 14.4dB(Vrms/FS) / G=H 20.1dB (Vrms/FS) XLR : G=L 14.4dB(Vrms/FS) / G=H 26.5dB (Vrms/FS) |
| Channel balance | RCA : 0.3dB XLR : 0.3dB |
| Output impedance | RCA : 50 ohms XLR : 100 ohms |
| DX9 headphone amplifier (USB source @ 96kHz) | |
|---|---|
| THD+N @ 1kHz (A-wt) | Single-ended output: < 0.00007% @ output=550mW(32ohms) / < 0.00007% @ output=60mW(300ohms) Balanced output: < 0.00007% @ output=550mW(32ohms) / < 0.00007% @ output=60mW(300ohms) |
| THD @ 20-20kHz 45kBw | Single-ended output: < 0.00050% @ output=550mW(32ohms) / < 0.00050% @ output=60mW(300ohms) Balanced output: < 0.00050% @ output=550mW(32ohms) / < 0.00030% @ output=60mW(300ohms) |
| SNR @ Max out 1kHz (A-wt) | Single-ended output: 130dB @ 1kHz Balanced output: 131dB @ 1kHz |
| Dynamic range | Single-ended output: 130dB @ 1kHz Balanced output: 131dB @ 1kHz |
| Frequency response | Single-ended output: 20Hz-20kHz (+/-0.6dB) / 20Hz-40kHz (+/-2.0dB) Balanced output: 20Hz-20kHz (+/-0.6dB) / 20Hz-40kHz (+/-2.0dB) |
| Output level | Single-ended output: 15Vpp @ G=L / 24Vpp @ G=H Balanced output: 15Vpp @ G=L / 48Vpp @ G=H |
| Measured noise level AP (A-weighted) | Single-ended output: < 1.3uVrms @ G=L < 1.6uVrms @ G=H Balanced output: < 0.8uVrms @ G=L < 2.4uVrms @ G=H |
| Effective noise level (A-weighted) | Single-ended output: < 1.1uVrms @ G=L < 1.4uVrms @ G=H Balanced output: < 0.5uVrms @ G=L < 2.1uVrms @ G=H |
| Channel crosstalk | Single-ended output: -130dB @ 1Khz Balanced output: -133dB @ 1kHz |
| Gain | Single-ended output: G=L 12.5dB(Vrms/FS) / G=H 18.5dB (Vrms/FS) Balanced output: G=L 12.5dB(Vrms/FS) / G=H 24.5dB (Vrms/FS) |
| Channel balance | Single-ended output: 0.3dB Balanced output: 0.3dB |
| Output impedance | Single-ended output: < 0.1 ohms Balanced output: < 0.1 ohms |
| Output power | Unbalanced output: 3300mW x2 @ 16 ohms THD+N<1% 2120mW x2 @ 32 ohms THD+N<1% 1190mW x2 @ 64 ohms THD+N<1% 270mW x2 @ 300 ohms THD+N<1% Balanced output: 10000mW x2 @ 16 ohms THD+N<1% 7080mW x2 @ 32 ohms THD+N<1% 4250mW x2 @ 64 ohms THD+N<1% 1060mW x2 @ 300 ohms THD+N<1% 540mW x2 @ 600 ohms THD+N<1% |
| Load impedance | Single-ended output: > 8 ohms Balanced output: > 8 ohms |
| General | |
|---|---|
| Power supply | 100-240VAC 50-60Hz |
| Dimensions | 34x23x6cm |
| Weight | 2.75kg |
| Color | Silver |
| Package | 1x Topping DX9 Discrete 1x Remote control 1x USB cable 1x Bluetooth antenna 1x 3.5mm to 6.35mm jack adapter 1x AC power cable |
| Input | AES/EBU |
| Input | USB |
| Input | Optical |
| Input | I2S via HDMI |
| Input | SPDIF |
| Input | Bluetooth |
| Output | XLR |
| Output | Jack 4.4mm |
| Output | RCA |
| Output | Jack 6.35mm |
| DAC / ADC Chip | R2R LADDER DAC |
| DAC / ADC Chip | PSRM |
| Max sampling rate | DSD512 |
| Max sampling rate | 768kHz |
| Color | Silver |
| Class | N/A |
| Networking | No |
| Remote Control | Yes |
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