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put it this way take a Zhaolu and put some decent op amps and you then have a better dac than the beresford.
Or visa versa. There are quite a few mods you can do on the Beresford, but like I am the only one posting any of my own mods on head-fi. I have seen some spectacular mods on other forums that I would like to try.
The PCM1716 is an old product number, but if anything, the Beresford shows what can be done with that chip unlike anything else that other PM1716 users have previously managed. But I don't know what age of the I has got to do with it. The dirt cheap TDA1541 from nearly 3 decades ago can still be found in DACs costing more than a car. So I would say that a lot of people are blinkered in their opinions of components and the length of time those components have been on the market. The humble carbon resistor from well before WWII can still be found in present day electronic components.
Originally Posted by ChilledoutUK
Whereas using a decent DAC chip is a good starting point when making a dac and gives you potential to make a wicked dac.
Are you saying the PCM1716 is not a decent DAC chip? Where did you read that?
all the info is in that really long thread about moding the zhaulo. I zaped my 2.5c zhaulo, wasnt all that bad took less then 20mins. All you need to know is how to solder and take the zhaulo apart. Casing it back up will take longer depending how the parts are layed out.
Ah I was wondering if anyone did the Zapfilter along with other mods like caps and opamps or what-not. Dont even know how many mods there are for the Zhaolu, everytime I think i've read a thread with em all another thread lists more mods or something
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In the specs for the new pcm dacs like the pcm1794
I downloaded the TI datasheet for the PCM1794, but it doesn't mention anything about it sounding better than the PCM1716. Perhaps you can cut & paste the passages in the datasheet specs where you read the information?
Ah I was wondering if anyone did the Zapfilter along with other mods like caps and opamps or what-not. Dont even know how many mods there are for the Zhaolu, everytime I think i've read a thread with em all another thread lists more mods or something
The Zhaolu uses one of the PM179X series DAC chip. According to at least one comment it is supposed to be a good chip. Why all the need to modify, and at great expense, a Zhaolu when you can buy something better sounding straight out of the box? I don't quite understand why anyone would spend their time getting something of little sonic quality, and then shell out good money to turn it into something half decent. Has the manufacturer ever considered making a decent DAC from the outset?
The Zhaolu uses one of the PM179X series DAC chip. According to at least one comment it is supposed to be a good chip. Why all the need to modify, and at great expense, a Zhaolu when you can buy something better sounding straight out of the box? I don't quite understand why anyone would spend their time getting something of little sonic quality, and then shell out good money to turn it into something half decent. Has the manufacturer ever considered making a decent DAC from the outset?
I belive you are spreading a little misinformation. The Zhaolu through versions 2.5 use either a CS4398 (flagship DAC) or a AD1852 depending on whether you buy the C or the A versions. The new 3.0 versions only use the CS4398, I believe.
To clarify, the BB 179+ series DAC's are the successor's to the superb BB 1704. Not all DAC's are created equal. Each company will have "economy" and flagship DAC's in their line up to accomodate manufactures needs whether they be, high end or low end. The 1716 is quite old technology and is a budget DAC along with newer BB 1738's (Pioneer Elite) and BB 1748's (Squeezebox). All the drum beating in the world won't change that.
It doesn't mean that an economy DAC won't sound good but it'll simply not offer the sound quality of the top of the line assuming proper implementation. Actually, implementation is critically important. FWIW, the economy DAC's cost $1.50 - $3.00 each in small quantities. Not exactly budget busting prices.
I have a Zapfiltered Zhaolu 2.5C that I absolutly love. Ori's 2.5A version is also superb based on the many, many satisfied customers. Both of these will compete with expensive DAC's due to the refined discrete analog output stage.
If you'd simply state the 7510 is a great entry level DAC and leave it at that, people would get off your rear and you'd have some credibility. Your buddy would also sell more.
To clarify, the BB 179+ series DAC's are the successor's to the superb BB 1704. Not all DAC's are created equal. Each company will have "economy" and flagship DAC's in their line up to accomodate manufactures needs whether they be, high end or low end. The 1716 is quite old technology and is a budget DAC along with newer BB 1738's (Pioneer Elite) and BB 1748's (Squeezebox). All the drum beating in the world won't change that.
. There are quite a few mods you can do on the Beresford, but like I am the only one posting any of my own mods on head-fi. I have seen some spectacular mods on other forums that I would like to try. 
Linear Mode
