Anyone use Koetsu with Harbeth

Harbeth's are typically a warm sounding speaker ( nothing wrong with that, IMHO). Koetsu's are also a warm sounding cartridge. The Kleos is more resolving- and if set up correctly, more neutral than any Koetsu that I have heard. 
I would think that for most the Koetsu/Harbeth match would be too warm and not resolved enough.

I recently did a search for a new cartridge for my system which includes Harbeth Super HL5+ speakers and the Aesthetix Mimas integrated amplifier. I use a Clearaudio Performance DC turntable. After listening to 10 different cartridges I settled on the AMG Teatro. It was the best cartridge I've heard at that price point, $2700. Based on the sound you are looking for it might be a great choice for you. There are a few reviews online that go into the specifics and may be worth a read.

 At $4K you might want to look at the Clearaudio Stradivari v2. It's a bit more rich in the midrange than the AMG. Good Luck!

Going from 10 year-old memory of a system that’s seen a lot of change over the years, but I’m certain my friend Tom used and loved Koetsu RSP with Harbeth Super HL5 (original version?). He has a great ear and wouldn't like a system that was overly warm or unbalanced in any significant way. I heard those Harbeth, though I forget if he had the RSP yet or not, and they were very nice and musical, with excellent refinement and articulation at moderate listening volumes. Though, I’m not sure if they could rock out (didn’t try). I use Tannoy & Koetsu myself; very good for rocking out at loud volumes.

I know my friend missed the RSP after he moved on. I actually bought it off him. It’s an early 2000s vintage, supposedly one of the last that had any involvement from Sugano Sr. It sounds great, but I’ve also had a few modern stone platinum models, and like those slightly better - biggest difference is that stone bodies have more powerful bass. The modern platinum models are quite close to neutral, with good extension and speed, very satisfying bass, certainly not syrupy or slow, while retaining the trademark Koetsu midrange magic.

Anyways, I wouldn’t be as concerned with speaker/cartridge pairings as with cartridge/arm pairing, particularly in the case of Koetsu. They tend to like higher mass and fixed rigid bearings. E.g. avoid "pure" unipivots, avoid carbon fiber wands, etc. The VPI unipivot with dual-pivot add-on, and the heavily damped/stabilized Graham Phantom unipivot are both quite serviceable for Koetsu, though you can always do better with a used Fidelity Research FR64fx or 64S for not too much money.

@mulveling  is right about arm cartridge matching. Koetsu used to sell a rebranded Jelco back in the day.

@karmapolice what else is i n your music chain? what's ur turntable and phono stage? Have you a very dry system? a cool one? a warm one? I tried harbeth on the premise that they are match made in heaven for my Lavardin IT - i found it to be a bit boring and dull - that said - i must say they may not have been fully run in and the CD player was not as entertaining as my own.

That said - if you want to breathe warmth and colour into your system - go get a Koetsu.

Are you limited to one arm and cartridge?

@mulveling  is right about arm cartridge matching. Koetsu used to sell a rebranded Jelco back in the day.

@karmapolice what else is i n your music chain? what's ur turntable and phono stage? Have you a very dry system? a cool one? a warm one? I tried harbeth on the premise that they are match made in heaven for my Lavardin IT - i found it to be a bit boring and dull - that said - i must say they may not have been fully run in and the CD player was not as entertaining as my own.

That said - if you want to breathe warmth and colour into your system - go get a Koetsu.

Are you limited to one arm and cartridge?