New flagship from AKM, the AK4499 DAC chip allows precise, fast and clean conversion of high-resolution audio files. The D90 thus integrates on its digital-to-analog conversion stage an AK4499 chip with Thesycon drivers allowing transparent and rich sound reproduction and supporting PCM files up to 32bit 768kHz and DSD up to DSD512 (via USB and I2S).
The DAC is combined with a pair of AccuSilicon 451584MHz and 49.1520MHz high-end femtosecond clocks and a CPLD. These allow a perfect synchronization of the data signals for an absolutely impressive jitter attenuation.
With its many features and connections, the D90 can be integrated into a vast majority of audio systems, offering many options for use and installation.
For its input connectivity, there are AES, USB-B (XMOS), Coaxial, Toslink Optics, and I2S LVDS via HDMI. Note that this last input has several selectable modes to adapt to your other I2S LVDS devices. On the output side, the D90 offers unbalanced RCA Stereo and balanced XLR. The D90's intelligent design allows only one or both outputs to be activated at a time.
With its integrated volume control, the D90 also acts as a preamplifier since it includes a volume controller. This volume control function can however be disabled so that the D90 can only be used as a DAC with output levels constantly at their maximums, i.e. 4Vrms for XLR output and 2Vrms for RCA output.
For its digital interfaces, Topping once again chooses very high quality and performance by integrating into its D90 an XMOS XU208 USB chip supporting high sampling rates up to 32bit 768kHz and up to native DSD512.
For SPDIF streams, an AKM AK4118 AKM chip processes the signal with extremely low jitter. This last chip is used for the Optical, Coaxial and AES inputs and allows sampling rates up to 24bit 192kHz PCM to be achieved on the latter.
Specification
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Product type:DAC
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DAC Chip:AKM AK4499
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USB Interface:XMOS XU208
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SPDIF Interface:AK4118
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Bluetooth:5.0 / Apt-X HD / LDAC
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Inputs:1x I2S LVDS (HDMI)
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1x USB-B (XMOS)
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1x Optical Toslink
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1x Coaxial SPDIF
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1x AES/EBU
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Outputs:1x Balanced XLR
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1x Single-ended RCA
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Supported sampling rates:USB : PCM up to 32bit 768kHz / Native DSD up to DSD512 / DSD DoP up to DSD256
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I2S : PCM up to 32bit 768kHz / DSD up to DSD512
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Coaxial, Optical, AES : PCM up to 24bit 192kHz
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Output voltage:RCA : 2Vrms @ 0dBFS
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XLR : 4Vrms @ 0dBFS
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Dynamic range (A-Weighting):128dB
GENERAL
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Power supply:AC 110V/220V 50/60Hz (switchable) via IEC (cable included)
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Case material:Aluminium
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Color:Black
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Inclued:USB-B to USB-A cable / Power cable / Remote control