Showing 1 of 164 conversations about:
CEntrance
1036
Michael Goodman
Aug 7, 2014
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Thanks to everyone for a successful drop!
Aug 7, 2014
wild_one
235
Aug 7, 2014
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Looks like it finished early this time around :)
Aug 7, 2014
Shazraf
17
Aug 8, 2014
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@CEntrance possible to get the Reserve Series Stereo 1/4" to Dual RCA cable?
Aug 8, 2014
skat
0
Aug 8, 2014
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You mentioned a few pages back there is no difference between DACport and DACport LX except for the pot but I assume you talked about the external appearance. Is there any way to bypass the Class A amplifier and get the line signal out from the DAC directly?
Aug 8, 2014
Shazraf
17
Aug 8, 2014
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The volume potentiometer has been replaced by a fixed-resistor divider in the LX, the headphone amplifier stage is now used as the line output amp
- source http://www.stereophile.com/content/centrance-dacport-lx
I think the difference mention is the design of the board.
Aug 8, 2014
skat
0
Aug 8, 2014
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Cheers for the link. I really thought there was more to it than just a resistor divider instead of the pot.
The interesting bit for me: "Some Internet writers have proclaimed the LX to sound more transparent and clear than the original DACport. Given that the only substantive difference is the replacement of the volume potentiometer with a pair of resistors, I found that hard to believe. ... Well, I'll be buggered. The LX did sound that little bit clearer."
I am now puzzled that a good quality pot can still make a discernible reduction in sound quality.
Aug 8, 2014
Shyan
119
Aug 9, 2014
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@CEntrance ...Yes +1 for the Reserve Series Y-cable stereo 1/4" plug to Dual-RCA plugs. Can it be purchase and ship together?
Aug 9, 2014
Lucun
27
Aug 10, 2014
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A higher quality trimpot may not actually reduce noise. Trimpots tend to be noisy compared to resistors due to how they are built to change resistance. In high precision circuits, normally you put a trimpot in a network of resistors so that you only change < +/-5% of the resistance / signal (reduced overall noise effects) or use a hand picked resistors to get the exact resistance (lowest noise).
Since volume trimpots greatly affect the resistance / signal, and the slightly noisy signal / reference voltage / gain will be sent to an amplifier, the noise is amplified, reducing sound quality. There are more complex circuits or larger trimpot like parts which can use a knob to adjust volume, but then the design would get too large for a portable dac/amp.
Aug 10, 2014
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