Hi, all,

I have a question about digital interconnect design/application.

I have a Musical Fidelity Tri-Vista 21 DAC and I'm using a Magnavox
CDB-560 CD player as a transport. I am using a .5M length of Monster
M1000D digital cable as an interconnect.

I have always believed that any properly designed and well-constructed
cable should do a good job of transferring a digital signal, and the
Monster cable (about $45) seemed to me to be a pretty good compromise
between spending big bucks for a "premium" cable and still calming the
"audiophile" angst that I get whenever I read the audio mags and
newsgroups.

I have been surfing the 'net reading all kinds of info about digital
interconnects, and the general drift is that a digital interconnect
ideally needs to be constructed so as to maintain a nice, constant 75
ohm characteristic impedance, including the connectors (the connections
and connectors theoretically being the source of any transmission
problems).

I understand that it is difficult to properly manufacture an RCA
connector for this application. Some sources (proponents of expensive
cables mainly) warn of dire consequenses if there are tiny
irregularities in the insulation/shield diameter, quality of the solder
joints, etc.

NOW... I reallize that there is controversy as to the real importance
and audiblity of all this stuff, but my question has to do with what
happens to the signal once the signal physically enters the DAC!

The Tri-Vista 21 uses the usual RCA coaxial connection at the input,
but the connection between the connector and the circuit board is a 5
inch long twisted pair of 22-gauge wires.

What effect (theoretically) does the change to the twisted pair have on
the characteristic impedance?

Wouldn't the change from coaxial cable to twisted pair have more of an
effect on signal quality than the short length of "improper" shield
diameter going through an RCA connector?