Frequency response: 5-50Khz
S/N: in excess of 110db
THD+N: 0.02%
Ground floor noise: 10uV
Output voltage: 1V nominal, 12V peak
Lonnie has also reiterated that the XDA-1 connected directly to an amplifier provides the highest quality of sonic reproduction, if that configuration works in your system.
Has full output attenuator (volume control) - preamp could be bypassed - a remote control is to be included for this purpose
It is 1RU (1 Rack Unit = 1.75 inches) in height
Cosmetics are currently being updated from early test models
Smaller black trim accessories are in the works for an all-black look
Inputs (both)
1) AES/EBU
2) Coax Digital
2) Optical Digital
1) USB (Should be PC & Mac Compatible)
Outputs
1) L/R Unbalanced RCAs
1) L/R Balanced XLRs (all outputs are hgh voltage)
Triggers (automatic on/off for amplifiers and XDA-1 itself)
1) 12v output trigger
1) 12v input trigger
Analog Devices AD1955 DAC, with 384k oversampling, and 1V rms (7V peak for extended dynamics), 24-bit, 192 kHz Sample Rate PCM Audio Data, 120 dB SNR/DNR (not muted) at 48KHz Sample Rate (A-Weighted Stereo), -110 dB THD+N (0.0003162%)
Burr Brown buffers coming out of the DAC
6 fully discrete output stages
Selectable inputs
Segmented power supply
The XDA uses a Dual dif input stage with crosslinked current sources, Darlington VAS stage and Darlington output stages, so the speed and current it can deliver is like night and day different from the ERC. So as good as the ERC sounded (and to be honest I thought it was amazing), the XDA is in a league all its own.
A little more detail from Lonnie regarding the quality and finesse of the XDA-1 design:
The DAC used in the XDA is the AD1955 which is the same DAC as used in the ERC-1, But the real magic is in the analog drive stage after the DAC. In the ERC it has a single stage drive where the XDA uses a Dual Differential input stage with cross linked current sources, Darlington VAS stage and Darlington output stages. The discrete output stage can easily produce in excess of 2 amps of current and swing in excess of 12v. So it will completely take all cables out of the equation.
