The module uses a 384 kHz
PWM frequency to output 200 watts per channel into 8[OMEGA] performance metrics include a THD + N of less than 0.05 percent, an SNR greater than 102 dB, and an efficiency of 96 percent.
Larry Ho, President of LH Labs, said, "We were the first company to release a 32 bit / 384 kHz
DAC back in 2011 and the only one to produce a 10 GB bandwidth USB cable.
The USB output does PCM in sampling rates from 44.1 to 384 KHz
at 16-, 24- and 32-bit resolutions.
32-bit upsampling to 384 kHz
Interestingly, this was the case even for the wideband sensors (for the near mid-plane source and the [S.sub.0] mode, the minimum and maximum intense frequencies were 60 kHz and 661 kHz; for the source near the bottom edge and the [A.sub.0] mode these maximum and minimum frequency values were respectively at 60 kHz and 384 kHz
The transmitter exhibits a conversion gain of 7.8 dB, an output power of 11.5 dBm, and has 4.1 percent EVM and -32 dBc ACPR (384 kbps [pi]/4-DQPSK signal with channel spacing 384 kHz) at the output power of 10 dBm.
For the digital modulation test, a 384 kbps, [pi]/4-DQPSK digital modulation signal with channel spacing of 384 kHz is applied to the RF transceiver.
For the digital modulation test (384 kbps [pi]/4-DQPSK signal with channel spacing 384 kHz), as listed in Table 6, the EVM and ACPR values are approximately 1.8 percent and -45 dBc (at 5 dBm output power) and -4 percent and -32 dBc (at 10 dBm output power), respectively.
Geek Out V2 is designed using the same principles found in their flagship product, Da Vinci DAC, and is capable of playing ultra high resolution audio up to 32 bit / 384 kHz
& DSD128 natively.
Typically, with a source sampled at 44.1kHz, systems will be eight times filtered with a PWM frequency of 384 kHz. This is fine except that images will appear in the AM band and RF interference is a criticism often aimed at switching amplifiers.
For example, a 4th order noise shaper with continuous feedback and a fast PWM frequency, of say 1 MHz, can guarantee an output resolution of 24 bits at 1 kHz and provide a superior performance than systems employing higher order noise shapers, 7th for example and a typical PWM frequency of 384 kHz.