Under the dac chip there are two Lundahl LL1588 transformers
Isolated Synchronous Error Correction System. Based upon an asynchronous buffer, voltage controlled crystal oscillators, and a 24 bit D/A converter – all under the precise control of an FPGA (Field Programmable Gate Array) running proprietary algorithms.
Bit Perfect and Virtually Jitter Free
Bit perfect conversion with total jitter output noise of less than 10 picoseconds RMS from any input – USB, TOSLINK, and SPDIF.
Multi-Stage Isolated Power Supply
Main power supply is isolated inside an external machined aluminum chassis. Eleven precision high-speed regulators provide low impedance and low noise “point of load” DC current to all analogue and digital circuits.
Isolated Audio and Digital Circuitry
Left and right channel audio output circuits, digital processing, and D/A conversion circuits are isolated within individual milled aluminum pockets resulting in exceptional EMI shielding, and thermal stabilization.
Wide range level control of outputs permit direct connection to power amplifiers.
The USB interface requires no additional drivers to install or maintain/update.
The USB interface is plug-n-play with all operating systems, including PC, Mac, or Linux.
Machined Aluminum Chassis
Precision-machined chassis milled from a solid block of aircraft grade 6061-T6 aluminum, provides exceptional thermal stability, RFI/EMI shielding, and resonance control.
6-Layer Circuit Boards
Multi-layer circuit boards provide extremely low impedance ground and power distribution for remarkably low digital noise contamination.
High-Precision Surface Mount Components
Extensive use of Lead (Pb)-free, low temperature coefficient, active and passive surface-mount components results in significantly smaller loop areas, reduced circuit capacitance and inductance, and introduces less noise than conventional leaded components.
Transformer Coupled Outputs
Transformer balanced XLR line outputs provide outstanding output common-mode noise rejection, eliminate potential ground loops, and ensure compatibility with other equipment.
Rhodium / Teflon Cardas output connectors for both balanced and unbalanced outputs preserve maximum audio signal integrity.
Allows remote control of volume, mute, standby, and input selection.
1x USB Accepts up to 24 bit PCM at 44.1, 48, 88.2, and 96 kHz
1x Toslink Accepts up to 24 bit PCM from 11 - 192 kHz
2x SPDIF Accepts up to 24 bit PCM from 11 - 192 kHz
Jeff's first entry into the digital world - if you're not counting the ICE-power sidestep (which technically wasn't digital either). The Aeris is classic JRDG: a heavy solid block of aluminum with machined cavities for the electronics. As with recent preamps, the circuitboard doesn't hold many components yet the sound is typical Rowland: smooth, liquid, refined and detailed. But there's also a newfound beat in its step and dynamics aren't only good on a mirco-level but also on macro-level.