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Post by jamesflames on Sept 28, 2015 1:59:02 GMT -5
I know there are many variables to the question I'm about to ask but where does the Fusion rank compared the the XDA-1 and XDA-2 with 2 channel music (flac 44.1)? I have a mini system which consists of a XDA-1 and UPA-2. It's being fed by a squeezebox touch (software modded). I've been attempting to get a working Fusion for 5 months (a long, ugly story) and I'm curious if the sound is comparable, better or worse. The fusion will be used in 2 channel and 5.1 but I'm still curious where it ranks if anyone has compared.
Thanks,
Corey
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Post by jamesflames on Oct 1, 2015 15:47:19 GMT -5
No info on the dac implementation between the Fusion 8100 and the standalone XDA-1 and XDA-2?
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Post by millst on Oct 1, 2015 17:40:41 GMT -5
The XDAs use a AD1955. It's right on the product page. The Fusion uses a Cirrus 42528.
I'd spend money on room treatment or better speakers before worrying about the DAC chip. It's a very small piece of the puzzle. I wouldn't expect the Fusion to sound better. It's got many channels, surround codecs, amplifiers, HDMI switching, etc. while the XPA is targeted towards 2-channel sound.
-tm
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Post by auxinput on Oct 14, 2015 18:04:14 GMT -5
The XDA has a heck of a power supply feed. I see a lot of (what I think) are voltage regulators on the main audio board, so I think the power supply voltage is extremely filtered/regulated. This will lead to better voltage stabilization on the DACs themselves. Also, the audio circuit following the DAC chips are fully differential on the XDA. You are only going to get unbalanced "single-ended" audio stage on the Fusion. One more thing to think about is (99% positive) that any digital signal coming into the Fusion is going to get down-sampled to 48Khz for the DSP bus. This means are you not going to get true 24/96 or 24/192 on the Fusion receiver. Actually, the only HT processor that I know for sure is not limited to 48Khz is the Theta Casablanca IV. That allows for a 96Khz DSP bus, but it requires double the amount of DSP module boards versus other processors. The Classe processor -may- support 96Khz, but I know they only have one DSP daughter board. It's written that the Classes SSP-800 will sample-convert any audio signal to 96Khz because "the DACs are most stable at that sample rate". The reason that processors downconvert everything to 48Khz is the bandwidth required to do all the decoding (such as dolby digitial, DTS, etc) as well as all the DSP (such as crossover filters, EQ, room correction, etc.). I have not heard of a bandwidth limitation on stand-alone DACS because they don't have to do any DSP processing. All they do is take in a digitial signal and strip out the individual channel PCM (or DSD) and then stream it directly to the DAC chips. |
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