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Original A9II

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The confusingly named A9II is the surpasser of the A9.3. Featuring a newly implemented and modified Song 213 CD transport the A9II is more accurate and is overall superior to its precursor. The DAC setup has been upgraded to feature not just one Burr Brown PCM1792 but uses two! This formation balances the entire circuit and the A9II actually samples at 352Khz. As a result music reproduction is finer and more distinct. Another worthy feature is its ability to change filtering algorithims, or put simply allowing the user to have a "smooth" or "crystal" sound signature at the flick of a switch. The power going to the PCM1792 both have a multi-stage voltage-stabilizer circuit ensuring that electrical disturbance and distortion are minimal and eliminating background noise. In addition the A9II has an excessively big circuit board to avoid cluttering components and significantly reduces the signal to noise ratio.

Information about Original

Forum Discussion - http://coemaudio.com.au/forums/YaBB.pl?num=1208950275/

Features

• Modified Sony KSS-213 CD Transport
• Dual-Mono Burr Brown PCM1792 Delta Sigma/R2R hybrid DAC topology
• 24Bit - 196kHz output
• Fully balanced circuitry from DAC to analog stage
• Two selectable modes of operation
  • 1 : Sharp Digital Filter
  • 2 : Slow Digital Filter
• Master Clock with independent power supply
• GOS digital processing used to filter out noise
• Dual Toroidal transformers
• All circuity layed out on a single large circuit board to avoid un-necessary wire connections
• CNC milled full metal anti-resonant feet
• Full metal remote control

Specifications

• Frequency Response - 5Hz ~ 20kHz
• Signal-to-Noise Ratio - 105dB
• Total Harmonic Distortion - 0.0015%
• Dynamic Range - 120dB
• Supply Voltage - AC240v 50Hz
• Dimensions - 430W x 90H x 310D (mm)
• Weight - 13kg
• Outputs - Balanced XLR, Single-Ended RCA, Digital Coaxial and Optical

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