QUAD 306 revamp - I am in awe!

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#122
jean-paul said:
No collection anymore, just 4. It is all a bit of a waste of time when looking at the actual goal of playing good stuff of which some are recorded worst than the worst DAC may hamper 🙂 Then about 10% of all stuff coming out every month is listenable. So filtering, again filtering and what is left does that really deserve the best DAC in the world? And then that best DAC having the very best 2025 ESS chip may distort with my favorite CD 😀

Will do, promised.
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limono said:
Jean , just spend the money. By used ESS dac from.euro outfit. I find Chinese Auralic Altair ( old ) good enough for bedroom. Who knows but $4000 G2.2 version may be good enough for living room 🙂 Buy Weiss . It should be cheaper in Germany. I have impression you're constantly buying some xingciuan brands ..
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limono said:
To hear properly designed and executed DAC design with ESS Sabre chip. Two I have a personal experience with are Auralic ( old Altair at $2k retail and Weiss 202 at $8k ).are in my opinion good enough to have a pleasant listening experience. I'm not into a dac switching game but unlike the amps and sometimes speakers I never heard a cheap dac that I liked, and I don't believe for a second that due to fast progression of technology a cheapies of today stomp all over the relatively vintage SOTA dacs..
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Please stay on topic which is

QUAD 306 revamp - I am in awe!​

 
#123
ejp said:
With what object?
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The product description of bias select for the TLC271 which is IC1 in the Quad 306 , describes it is achieved as a voltage divider, so as to derive, for medium bias a 0v connection from split supplies, 🙂 it makes no mention of involving the output pin shorting Pin 6 and 8 . 🙁
https://www.ti.com/lit/ds/symlink/tlc271.pdf

"bias selection
Bias selection is achieved by connecting the bias select pin to one of three voltage levels (see Figure 1). Formedium-bias applications, it is recommended that the bias select pin be connected to the midpoint between thesupply rails. This procedure is simple in split-supply applications, since this point is ground. "

The object, in Post #117 is lowering of measured offset, and better stability by having the bias select Pin 8 separated from the TLC271 output, and Pin 8 connected as Texas Instruments intended with a voltage divider.
 
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