DIY balanced interconnects

I have compared Mogami Neglex 2534 with Oyaide PA-02 on a system with an Atma-Sphere MP-1 preamp and M-60 monoblock amplifiers.

According to Ralph Karsten, no difference between the cables should have been apparent. However, I heard more extension and detail in the PA-02, and that's what I presently use for my 30 foot balanced runs.

The Mogami is a terrific value, and I do not hesitate recommending it.

...your equipment should support all aspects of the balanced line standard.
Atmasphere (Threads | Answers)

Ralph, you're probably more educated than anyone here regarding which components support all aspects of the balanced line standard.

Would you provide a list of companies and/or products that fit this description?

Thus far, most high end audio companies that produce balanced components do not appear to support the standard, as far as I can tell.

Ralph, with respect to your efforts to champion the 600 ohm standard, if only
Atma-Sphere, and possibly Roland (see below for Wadia and Modwright)
support the 600ohm standard in high end home audio, then it seems to me
the discussion as it relates to the effects of wire in a system is largely moot.

It's akin to discussing Betamax in a world of VHS (or Blu-Ray in a world of
HD-DVD).

Edit - a quick search of Modwright reveals the MW Transporter and 36.5
preamp each have output impedances of 110 ohms. The Wadia 861 has an
output impedance of 118 ohms from the XLR outputs.

Tvad, its not really a VHS/Beta thing- the point is that
if you want to get off the cable merry go round, using the low impedance
standard is the ticket.
Atmasphere (Threads | Answers)

Thus far, unless I have missed something in the discussion, Atma-Sphere is
the only high end audio company that has been identified as adhering to the
600 ohm standard. Rowland, Modwright, and Wadia have been eliminated as
having non-standard output impedances.

So, unless there are other as yet unidentified companies the adhere to the
600 ohm standard, to get off the cable merry-go-round one has only one
option: Atma-Sphere. Additionally, Atma-Sphere doesn't produce source
components, so strict adherence to the 600 ohm standard appears to be an
impossibility.

In this scenario, the Beta/VHS analogy seems to be appropriate.

I'm honestly not trying to be argumentative here.

What am I missing?

The components I want to connect are a BAT VK30 preamp,Pass Labs aleph amp, Cary CD, and theta gen V DAC. I feel pretty confident they all meet fully balanced criteria and probably 600 ohms (if not let me know please).
Oldears (Answers)

BAT VK30 output impedance = 300 ohms.

Cary 303/200 output impedance = 99 ohms unbalanced and 198 ohms balanced. You don't mention which Cary CD player you are using.

I couldn't find any info on the Theta Gen V DAC, but the Theta Gen VIII DAC has output impedance specs of 11.5 ohms for the unbalanced RCA jacks, 23 ohms for the balanced XLRs.

04-03-09: Atmasphere
Tvad, what you are missing is the output impedance is not the spec. For
example, the Modright might have a 100 ohm output impedance- if the
output winding is designed to drive 600 ohms then it would work fine. Ditto
Roland and Wadia. The output impedance is something very different from
what load the circuit will drive.

According to your latest information, a tube component with low output
impedance (the examples above were 300 ohms or less), and that has either
an output transformer or is direct coupled, will adhere to the 600 ohm
standard.

In addition, the important factor in the 600 ohm output impedance standard
is not the actual output impedance specification, but the design of the
transformer's windings.

How is a customer expected to determine if an output transformer's winding
is designed to drive 600 ohms, if there is no specification to indicate such?