Topping DX9 Discrete pairs a distinctive DAC design with extensive wired and wireless connections
The Topping DX9 Discrete combines a DAC and six-channel headphone amplifier with proprietary PSRM processing, a 10-band PEQ and a see-through design. Topping says its discrete delta-sigma architecture reduces distortion while preserving a more analogue-like sound.
What We Know
The Topping DX9 Discrete is now available in the UK for £1,299 (about $1,750, AU$2,600). Following the DX5 II DAC, amplifier and preamp combination, Topping's latest model introduces its proprietary PSRM digital-to-audio conversion architecture and support for a 10-band PEQ.
It also keeps its predecessor's see-through construction, leaving the internal circuitry visible.
Connections and headphone amplification
A front display provides access to settings and operating information. Connections include USB, optical, coax and HDMI, with decoding support reaching 32-bit 768kHz PCM / DSD512.
Wireless connectivity comes through Bluetooth 5.1, supporting LDAC, various aptX standards, AAC and SBC. The six-channel headphone amplifier is intended to drive even demanding headphones.
Discrete components with delta-sigma processing
The DX9 Discrete's main distinction lies in its DAC architecture. R2R DACs use discrete components and can produce a warm, harmonically rich sound, but often with greater distortion. Integrated DAC chips offer lower distortion, though their presentation can seem colder and more digital.
Topping's PSRM system aims to combine the advantages of both approaches. It uses discrete components, as an R2R DAC does, but performs delta-sigma processing associated with integrated chips. The signal passes through a 1-bit pipeline at extremely high sample frequencies, purportedly in the megahertz range.
According to Topping, the process is comparable to converting Hi-Res Audio files into DSD, which natively uses a high-frequency, 1-bit format. The company promises substantially lower distortion than R2R designs while retaining a somewhat more analogue-like presentation.
That makes PSRM an intriguing proposition for audiophiles, although how well it delivers remains the question. Beyond that processing approach, the DX9 Discrete offers a broad set of features as a combined DAC and headphone amplifier.
