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Refurbished product - Grade B
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To celebrate its 15th anniversary, Topping unveils a high-performance DAC / Headphone Amplifier: the DX9. In addition to its very high performance, Topping has given it a meticulous aesthetic with an innovative and unique design. The DX9 incorporates top-quality components, including an AKM AK4499EQ DAC chip. This DAC chip delivers performance equivalent to the integration of no less than two AK4499EXs. In fact, it enables the Topping DX9 to achieve a dynamic range of 131dB and a THD+N of less than 0.0007%. An AK4118AEQ chip handles the reception of optical/SPDIF signals, for very low jitter. On the headphone amplifier side, the DX9 incorporates a discrete NFCA amplifier circuit with 6 modules each comprising 39 transistors. The power supply stage is separate for the DAC and headphone amplifier parts, producing a pure, stable power supply. In terms of aesthetics, the curved case and the two screens with Topping's own Aurora UI interface provide the best possible user experience. In addition, a transparent top plate engraved with Topping's 15-year anniversary logo gives a view of the DX9's perfect circuit design.
Topping has integrated the rare and legendary AK4499EQ 4-channel DAC chip into the DX9. This chip alone achieves the performance equivalent of two AK4499EX chips, with a THD+N of less than 0.00007% and a dynamic range of 131dB. It enables the DX9 to support sampling rates up to PCM 32bit 768kHz and native DSD up to DSD512.
The AK4499EQ DAC chip is coupled to an AK4118AEQ optical/SPDIF signal reception chip for perfect signal reception on coaxial SPDIF, Toslink optical and AES/EBU inputs. Finally, a CPLD works on the clock signal and digital signal optimization to obtain a perfect level of stability and purity.
The ultra-high-performance Qualcomm QCC5125 Bluetooth 5.1 chip enables the Topping DX9 to work with high-quality wireless codecs: aptX, aptX HD, aptX Adaptative and LDAC. Qualcomm's QCC2551 is a 32bit Low Energy chip (Bluetooth LE standard).
Topping's DX9 headphone amplifier circuit is based on 6 discrete component modules, each consisting of 6 NFCA channels with 39 transistors. This circuit surpasses all other discrete component headphone amplifier circuits on the market. In fact, each module communicates with its peers for exceptional overall performance. The amplification circuit uses a balanced and unbalanced interface independently, enabling it to greatly reduce noise and distortion. Moreover, this makes it capable of driving all types of headphones on the market with a power of 2x 7000mW @32Ω and a THD+N of less than 0.00009%
The volume control consists of a network of resistors coupled to various relays for an unrivalled degree of precision. It also optimizes SNR and noise levels at low volumes. The relay circuit is used in conjunction with a digital control interface to reduce distortion and protect the DX9 from potential interference.
The DX9's rounded curves give it an outstanding aesthetic. Coupled with two color screens and its Aurora UI interface, the user experience is made exceptional. To top it all off, a transparent plate on the top of the device allows you to observe the DX9's internal circuitry. This plate also features Topping's 15th anniversary lettering.
1 | Ignition button |
2 | Dual screen |
3 | Multifunction knob |
4 | 6.35mm jack headphone output |
5 | Balanced 4.4mm jack headphone output |
6 | XLR 4-pin balanced headphone output |
7 | XLR stereo preout output |
8 | RCA stereo preout output |
9 | RCA stereo line output |
10 | XLR stereo line output |
11 | I2S input via HDMI |
12 | 2x Entrées optiques Toslink |
13 | 2x Toslink optical 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 SPDIF coaxial 2x Optical Toslink 1x AES/EBU 1x I2S via HDMI Bluetooth |
Outputs | XLR and RCA stereo line outputs XLR and RCA stereo preout outputs 1x 6.35mm jack headphone output 1x 4.4mm balanced jack headphone output 1x 4-pin XRL balanced headphone output |
DAC Chip | AK4499EQ |
Trigger 12V |
DX9 DAC (Line output / USB in @96kHz) | |
---|---|
THD+N @ 1kHz (A-wt) | RCA : < 0.00008% XLR : < 0.00007% |
THD @20-20kHz 90kBw | RCA : < 0.00015% XLR : < 0.00015% |
SNR @1kHz (A-wt) | RCA : 127dB XLR : 131dB |
Dynamic range | RCA : 127dB XLR : 131dB |
Frequency response | RCA : 20Hz-20kHz (±0.2dB) / 20Hz-40kHz (±0.6dB) XLR : 20Hz-20kHz (±0.2dB) / 20Hz-40kHz (±0.6dB) |
Output level | RCA : 2.1Vrms @0dBFS XLR : 4.2Vrms @0dBFS |
Noise (A-wt) | RCA : < 1.0uVrms XLR : <1.3uVrms |
Channel crosstalk | RCA : -125dB @1kHz XLR : -125dB @1kHz |
Channel balance | RCA : 0.3dB XLR : 0.3dB |
Output impedance | RCA : 50Ω XLR : 100Ω |
Supported sample rates | PCM 32bit 768kHz, DSD native up to DSD512 |
DX9 HEADPHONE AMPLIFIER (USB IN @96KHZ) | |
---|---|
THD+N @ 1kHz (A-wt) | Unbalanced output: < 0.00010% @ output=550mW (32Ω) / < 0.00008% @ output=60mW (300Ω) Balanced outputs: < 0.00007% @ output=550mW (32Ω) / < 0.00007% @ output=60mW (300Ω) |
THD @20-20kHz 90kBw | Unbalanced output: < 0.00060% @ output=550mW (32Ω) / < 0.00030% @ output=60mW (300Ω) Balanced outputs: < 0.00050% @ output=550mW (32Ω) / < 0.00030% @ output=60mW (300Ω) |
SNR @ Max out 1kHz (A-wt) | Unbalanced output: 131dB @ 1kHz Balanced outputs: 132dB @ 1kHz |
Dynamic range | Unbalanced output: 131dB @ 1kHz Balanced outputs: 132dB @ 1kHz |
Frequency response | Unbalanced output: 20Hz-20kHz (±0.2dB) / 20Hz-40kHz (±0.6dB) Balanced outputs: 20Hz-20kHz (±0.2dB) / 20Hz-40kHz (±0.6dB) |
Output level | Unbalanced output: 12Vpp @ G=L / 24Vpp @ G=H Balanced outputs: 12Vpp @ G=L / 47Vpp @ G=H |
Noise (A-wt) | Unbalanced output: < 1.6uVrms @ G=L / < 2.4uVrms @ G=H Balanced outputs: < 1.3uVrms @ G=L / < 4.2uVrms @ G=H |
Channel crosstalk | Unbalanced output: -98dB @ 1kHz Balanced outputs: 121dB @ 1kHz |
Gain | Unbalanced output: G=L 12.5dB (Vrms/FS) / G=H 18.5dB (Vrms/FS) Balanced outputs: G=L 12.5dB (Vrms/FS) / G=H 24.5dB (Vrms/FS) |
Channel balance | Unbalanced output: 0.3dB Balanced outputs: 0.3dB |
Output impedance | Unbalanced output: < 0.1Ω Balanced outputs: < 0.1Ω |
Output power | Unbalanced output: 2x 3300mW @16Ω THD+N<1% 2x 2100mW @32Ω THD+N<1% 2x 1190mW @64Ω THD+N<1% 2x 240mW @300Ω THD+N<1% Balanced outputs : 2x 10000mW @16Ω THD+N<1% 2x 7080mW @32Ω THD+N<1% 2x 4250mW @64Ω THD+N<1% 2x 950mW @300Ω THD+N<1% 2x 460mW @300Ω THD+N<1% |
Load impedance | Unbalanced output: > 8Ω Balanced outputs: 100Ω |
General | |
---|---|
Dimensions | 34x23x6cm |
Net weight | 2,75kg |
Color | Black |
Package | 1x DAC Headphone amplifier TOPPING DX9 1x Remote control 1x USB-A to USB-B cable 1x Bluetooth antenna 1x 6.35mm jack to 3.5mm jack adapter 1x Power cable |
Input | USB |
Input | Optical |
Input | I2S via HDMI |
Input | SPDIF |
Input | Bluetooth |
Input | AES/EBU |
Output | XLR |
Output | Jack 4.4mm |
Output | RCA |
Output | Jack 6.35mm |
DAC / ADC Chip | AK4499 |
Max sampling rate | DSD512 |
Max sampling rate | 768kHz |
Color | Black |
Class | N/A |
Networking | No |
Remote Control | Yes |
Refurbished Grade | Grade B |