| 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 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 |
