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发表于 2012-2-2 22:09:30
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Wadia have emailed me a press release dated 1/1/06 on their new 581 'Multi format audio player', which replaces their 861 line. There is also a 781 in the works which is supposed to replace the 861se, at a future date. The players contain a digital preamplifier which allow direct connection of the analogue outputs to a power amp, as do all previous Wadia players.
'Wadia 581 and 581i Disc Players feature multi-format stereo audio playback, new digital to analog technology and other sonic enhancements for CDs, SACDs and high rate sample sources.'
'The Wadia 581 is available now at a US retail price of $6950… The Wadia 581i [ has digital inputs and outputs] ia available now at a US retail price of $8450.'
The Press release is sparse. The new players use the Wadia finite impulse response filter, the Digimaster. ' New design features include a multi-format capable transport, an advanced proprietary software based DSD processing algorithm that generates bit corrected SACD playback.' The photo of the new player looks the same as the 861. 'Performance of this mechanism surpasses even the highly acclaimed 3.2 transport featured in previous players.' Reading between the lines, and extrapolating from the blurb on their new reference DAC 9, this is PCM converted DSD.
A Wadia rep who attended CES has e-mailed me regarding some questions I put to them. There has been some confusion in the Audio Asylum site re their new products.
1) The 581 stereo SACD player will be shipping in February 2006, contrary to the press release.
2) I asked what chips were used in the new players. "We use the best Burr-Brown chips available and are able to send them [ both the CD and SACD bitstream] to 768 kHz. We then use a series of the chips in parallel along with our patented DigiMaster upsampling software to produce a 1.4 MHz sample rate. Our digital inputs were only able to accept a sample rate of up to 24/96. We will be using the same Burr-Brown chips in our 581 and 781." This is the same approach used in previous Wadia products, with the exception of the 27 DAC, their top model until this year's series 9 DAC, which oversampled to 2.8 MHz. However, the Meitner DAC6e apparently processes the CD layer at no less than 5.64 MHz ie 128fs!
3) Transport? "We are not using the TEAC VRDS neo mechanism in our new multi-format products. We have chosen to move away from the TEAC mechanisms for these products and we are using a multi-format transport manufactured in Korea with optics manufactured in Japan. We are also making our own modifications to the mechanism as well as the servo board along with an additional board to help control the operational functions. Our newly developed transport will be incorporated into our entire line of multi-format products."
4) How do they implement the volume control for the DSD bitstream? "We use proprietary software to perform the DSD multibit conversions. We also have a proprietary digital volume control that provides a range of theoretically perfect volumes without losing bits of data."
[ 本帖最后由 davidxtb 于 2012-2-18 20:47 编辑 ] |
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发表于 2012-2-2 22:01:51
