While very affordable, especially for a tube DAC that can possibly give some warmth or indeed, an analog sound/feel to CDs and digital media. I have one concern and that is the very short warranty on something of this nature. The Jolida Glass FX Tube DAC III has an unusually short warranty of only 6 months limited parts and labor with 3 months on the tubes (3 months for tubes makes sense though). This is unusually stingy in the industry. There are no details about build and such on the manufacture site, save the specs which I listed below.
There is also a version with Bluetooth ability called the Glass FX Tube DAC III W with much the same specs and price.
Output Level: 0 V to 2.3V (±1dB, 47K ohms)(SIN SIGNAL 0dB SPDIF IN)
Frequency Response: 20-20 KHz （±0.5dB）
Bandwidth: 10Hz to 70kHz + 1dB
SNR ＞90dB ( 20Hz-20kHz)
Dynamic Range 126 dB
Distortion THD: Less than 0.01% (1kHz)
Headphone Impedance 30 Ohms
Circuit Type: Ultra Linear, Class AB
Tube Complement: 2 pcs. 12AX7 pre-amplifier
Power Requirements: 110V-120 VAC 60Hz 90 watts-standby, 240 watts maximum (220 VAC 50Hz option)
Dimensions: 8 inches wide by 7 inches deep by 3 inches high
Weight: 7.5 lbs net, approximately 10 lbs.packaged
Construction Details and Features:
USB: 24/96 up sampling to 192 Hz
Toslink and coaxial: 24/192Hz
Galvanic Isolation: ADuM 1250 chips
Asynchronous Burr Brown Chip AD1896
Volume control and headphone jack
DAC Chip: PCM 1798
State the Art Components: capacitor filters, gold plated RCA jacks,
Multiple stages of regulation for SPDIF input receiver, USB input, clock oscillator, DAC and output stage for accurate output.
Very clean master clock to SPDIF input receiver and USB input to ensure low jitter operation.
Discrete filter and output stage for optimum performance (no Op-Amp ICs).
Digital output can be switched “on” or “off” (and is re-timed) to reduce the jitter level as compared to SPDIF input. This function can also be used to convert USB input to SPDIF output.
DSD (x64 DoP) via the USB2 input
Frequency Response : 20Hz – 20Khz ± 0.2dB
Total Harmonic Distortion : <0.005% at 2V RMS 1KHz output
Signal to Noise Ratio : >110dB ref 2V RMS output @ 1KHz
Channel Separation : 20Hz – 20KHz, >60dB
SPDIF Inputs : 32KHz to 192KHz up to 24 bits
USB Input : 44.1KHz to 192KHz up to 24 bits DSD x64
Mains Supply (factory set) : 110/120V or 220/240V, 50/60Hz
Power Consumption : 20VA
Dimensions – H x W x D : 90 mm x 440 mm x 310 mm
Nett Weight (unpacked) : 5kg
Gross Weight (packed) : 7kg
Arcam is a British audio company that came out with a DAC in 1987. Today they offer the ir DAC II which has the ESS sabre chip, DSD ability and bluetooth built in and a headphone jack.
Supported sample rates:
USB: 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz, 384kHz
Optical: 44.1kHz, 48kHz, 88.2kHz, 96kHz
Coaxial: 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz
Bluetooth: SBC, AAC, aptX, aptX:LL
Bit Depth : 16:bit, 24:bit
Headphone : 30Ω : 600Ω, 3.5mm plug
Dimensions: W194 x H44 x D124mm
Input: USB, SPDIF, optical, Bluetooth