Advanced 64 Bit Volume Control
In the past, attempts to engineer digital volume attenuation has been panned by audiophiles due to its very obvious ādigital-ness.ā Analog volume control has been preferred, though it also presents a problem because of the noise that it generates. Weā²ve taken a different approach to volume control with our advanced 64 bit attenuation circuit, which uses an ultra-high resolution, zero noise, bit perfect mechanism.
Geek Outā²s volume attenuation circuit replaces the computerā²s volume calculations with its own, ensuring that your music remains bit perfect all the way through the conversion process. This way, it ensures that no information is lost before Geek Out gets the data.
Pure Class A Amplification
Not only is Geek Out the most powerful family of portable USB eadphone amplifiers you can find on the market, it pumps out the power in pure Class A, the gold standard of amplification in most audiophile circles. It took us 8 months of research and development to pull off this feat, but we think the effort was well spent (so do many, many reviewers).
Innovative Digital Modes
Most DAC aficionados understand the importance of digital filters. One of the major functions of digital filters is to remove the digital artifacts that the digital-to-analog conversion process adds to the signal.
Geek Out features two user-selectable digital modes that go beyond digital filtration. These modes were developed specifically for Geek Out. These modes not only change digital filtration settings, but also the digital PLL windows of the internal DAC IC and the re-clock jitter removal circuit, along with other hardware installed into the DAC.
Users get the benefit of continuous upgrades to their digital modes through firmware releases.
TCM (Time Coherence Mode) uses LH Labsā² minimum phase digital filter and time optimization algorithm, which removes all PRE-ring from the converted signal and realigns the impulse response. This presents the listener with a more well-defined and natural soundstage. In short, this mode is optimized for time domain response.
FRM (Frequency Response Mode) uses a slow roll-off linear digital filter and frequency domain optimization algorithm to provide a smoother and clearer sound with even lower THD+N in the high frequencies. The IMD in the higher frequencies is lower because of frequency response and high frequency artifact optimization.
Three Layer Buffer
To ensure computer speed fluctuations donā²t smear your music, weā²ve developed a proprietary (and patent-pending) Three-Layer Buffer similar to the buffering technology many of today's high-speed computers employ. This is the first time such a design has been applied to audio.
|Specificatii||Frequency Response: 20 Hz - 55 kHz (-0.1 dB)
Maximum Power Output: 1000 mW @ 16 ohms
Maximum Output Voltage: 4.0 Vrms
Total Harmonic Distortion (THD+N): <0.01%
Signal to Noise Ratio (SNR): >101 dB unweighted
Input: USB 2.0 (Asyncronous)
Outputs: Dual 3.5mm analog stereo
Output Impedance: 0.47 ohms (output 1), 4.7 ohms (output 2)
Output Stage OpAmp: Texas Instrument TPA6120A2
Amplifier Output Bias: Class A
Digital to Analog Converter IC: ESS SABRE9018K2M
USB Controller: XMOS XS1-SU01A-FB96
PCM Sample Rates Supported: 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz, 352.8 kHz, 384 kHz
DSD Sample Rates Supported: 2.8224 MHz, 3.072 MHz, 5.6448 MHz, 6.144 MHz
Bit Depth Supported: 1 bit, 16 bit, 24 bit, 32 bit
Chassis Construction: CNC Machined T6061 Aluminum
Weight: 36 grams