Preamp power supply capacitor upgrade

I forgot to mention, the V-Caps would replace Jantzen Audio Silver Z-caps which retail for $23.

@atmasphere Thanks for chiming in!  I did consider the CuTF's for the coupling caps but they are not available in 2.7uf.  I wanted to retain the specification of the existing circuit.

@erik_squires I understand what you're saying and is partially why I posed the question.  Below is Backert Labs justification for the V-Caps in the power supply:

"At Backert Labs, all of our preamplifiers use the new GreenForce™ power supply.  Because GreenForce is totally unlike previous power supplies, Bob Backert was granted a patent on GreenForce in 2013.

For those who are familiar with electronics, an example of the surprising quality of GreenForce is that the capacitors used to power our Rhumba preamp total less than 1 uF (one microfarad). Most power supplies for a similar preamp would use hundreds, or 1000’s of microfarads.

Because so little capacitance is needed, GreenForce is the only power supply in the world that can run a stereo component entirely on PTFE capacitors such as V-Cap™ capacitors, which we feel are the finest type of capacitor for a power supply available today."

And another excerpt:

"The heart of any power supply is its capacitors.  Similar to batteries, capacitors provide the power for your equipment to operate.

The GreenForce power supply employed in all preamps by Backert Labs is unique, in that it allows the use of extremely high quality capacitors to run the power supply.

In our Rhumba and Rhumba Extreme models, the GreenForce power supply uses very high quality polypropylene capacitors for extremely linear and nimble response.

In our Rhythm models, the GreenForce power supply uses the costly V-Caps™ copper/PTFE capacitors. Online capacitor comparisons such as The Great Capacitor Shoot-Out tend to rank V-Caps in first place (and that is with the tin version of V-Caps, rather than the upgraded copper version that we employ).

The Rhythm 1.3 preamplifier is the only audio component in the world with an all-V-Caps or all-PTFE power supply.

The results:   Incredibly fast transients.  Tight, accurate bass with visceral texture and punch. Extremely accurate timing.  Incredibly fast dynamic changes — dynamics that really tell the story of what is on your source material."

No problem, I appreciate your input!

@atmasphere Yes, I was somewhat concerned about leakage over time but wasn't sure if it was a legitimate concern.  So, I guess that would point toward the V-Caps or Audyns as being more appropriate in the power supply.  I must say that I'm leaning towards the V-Caps as that's what Backert Labs had chosen for their Rhythm.  I understand what you previously said about the cost difference between the CuTF and TFTF being irrelevant (although $450 difference when using four is somewhat relevant to me), I just wasn't sure there would be a noticeable sonic difference when used in the power supply.

Thanks for the suggestions!

@bigkidz The Miflex copper foil/polypropylene oil and Mundorf Supreme silver gold series are certainly within budget and worthy of consideration.

@alan60 The "vertical" configuration of the leads of Duelund would may pose a problem, so I’d like to stick with the "horozontal" configuration.

I would be interested if anyone has any thoughts on the Audyn true copper max or silver series metalized silver polypropylene.

I think I’m beginning to over think this, so might just stick with the discounted V-Cap TFTF since it’s going in the power supply.

@mark200mph The cap supply store I use is partsconnexion.

@vthokie83 Thanks for the suggestion, I just sent him an email.

I just exchanged a few emails with Chris VenHaus and explained my dilemma.  In a nutshell, he said go with the TFTF's in the power supply which was what I wanted to hear but not confident enough in my knowledge of circuits and capacitors to decide for myself.  So I guess I'm good to go and thanks for all the replies!