Is tonearm cable the most important cable in the system ?

@inna - re....

I could just upgrade the RCA connectors, I guess.

I would highly recommend updating the RCa’s - after all, if you really like them you can always transfer them to the next arm. They are extremely easy to install and remove.

My RCA journey
- I initially replaced the RCA’s on my turntable with renown Silver Bullet RCA’s
- I was so impressed, I immediately replaced the RCA's on all of my IC’s
- Wrote a review of the Silver Bullet on my blog - which was read by Keith Louie Eichmann (KLE) of Silver Bullet "fame"
- KLE ask me to review his new RCA’s - the Harmony product line
- the improvements between the Silver Bullet and the Copper Harmony were easily discernible and also between each successive Harmony model

I now recommend the Silver Harmony as a more affordable starting point and the Absolute Harmony for the more "enthusiastic" audiophiles. Both are extremely good compared to the other competition out there. 

In my opinion, the Copper Harmony lacks the fine details and dynamic perofrmance of the Silver harmony and if you are considering the Pure harmony, you may as well spend the extra couple of bucks on the Absolute Harmony and get the best.

My system is what I consider "modestly priced" (around $11,000 MSRP including cables), but due solely to the cables, RCA’s and other connectors, it performs well above it’s price point.

The image is expansive, three dimensional and has a clarity most other systems costing much more seem to lack.

I’m not trying to sell anything here - I’m just spreading the word about a product that actually works.

OK - I’m done with the preaching.

Happy listening :-)

Regards - Steve

Most important ....

Yes

Syntax, your ancestors must've come from Ancient Greece.

for me it's the cable between the phono SUT and preamp 

There's little you can do about the wiring to cartridge when the TT's wiring is "captive" (ie, non-detachable/replaceable). But if you have RCA L+R jacks on outside of your TT, what you CAN do is up your game by getting the best possible cable to connect TT's outputs to preamp. 

I won't try to recommend cable for that. There are many worthy candidates. I'll just say this:

1 - In doing this, you are increasing the sonic potential of your TT in the same manner as any other source component that connects to the TT via RCA cable

2 - The difference is that the signal coming out of the TT (assuming RIAA equalization is done in the preamp or phono amp, not in the TT) is even lower in level than the typical 2.0-3.0 volts being output by tape decks, CD players/DACs, etc. The TT output signal is more fragile than that--so will benefit (perhaps dramatically) by a really good RCA cable w/low capacitance and other qualities of robust design.