Feature | DAC1 | DAC1 USB | DAC1 PRE | DAC1 HDR |
UltraLock™ jitter-immune clock-isolation technology | YES | YES | YES | YES |
Built-in HPA2™ reference-grade 0-ohm headphone amplifier | YES | YES | YES | YES |
24-bit, 192 kHz digital input capability | YES | YES | YES | YES |
Balanced XLR and unbalanced RCA stereo outputs | YES | YES | YES | YES |
True-analog volume control on front panel | YES | YES | YES | YES |
Calibrated and variable mode to accommodate various systems | YES | YES | YES | YES |
Trim-pots for calibrating output levels | YES | YES | YES | YES |
Output attenuators for XLR outputs | YES | YES | YES | YES |
Internal power supply with low-radiation torodial power transformer | YES | YES | YES | YES |
Built in USA | YES | YES | YES | YES |
Rackmount capable | YES | YES | YES | YES |
AdvancedUSB input capable of full-resolution 24-bit / 96-kHz | NO | YES | YES | YES |
State-of-the-art LM49860/LM4562 high-current op-amps | NO | Ouput stage only | Throughout entire analog stage | Throughout entire analog stage |
Selectable gain-range for headphone amplifier | NO | 2 ranges | 3 ranges | 3 ranges |
Auto-mute function built into headphone jack | NO | YES | YES | YES |
Auto-standby feature | NO | YES | YES | YES |
Number of digital inputs | 3 | 4 | 5 | 5 |
Number of analog inputs | 0 | 0 | 1 | 1 |
High-quality Teflon, chassis mounted RCA connectors | NO | NO | YES | YES |
Standby ON/OFF button | NO | NO | YES | YES |
Remote Control | NO | NO | NO | YES |
Custom-built motorized Alps potentiometer | NO | NO | NO | YES |