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Gorgeous Kenwood KP-990 Turntable Service

Join me as we repair and service a gorgeous Kenwood KP-990 / KD-990 direct drive turntable.

The Kenwood KP-990, also known as the Kenwood KD-990 in many markets, is almost the last serious turntable Kenwood made. This is sad, but a reflection of the arrival of CD, which, for many, spelled the end of vinyl. It ultimately wasn’t, of course, but it certainly was for a while. Anyway, Kenwood did a great job with the KP-990 / KD-990, so today we are going to dig into it a little. Welcome back, everyone.

Background

The KP-990 / KD-990 was close to the last in a line of turntables that started with the KD-600/650, a deck many will be familiar with if you’ve followed me over the years. I was a very happy KD-600 owner for many years and added a lovely Jelco tone arm to mine, to replace the SME Series 3 I still own. Here is a link to my KD-600/650 article archive.

The KD-600/650 were followed by the KD-700, then the KD-750, the KD-770, the KD-850, the KD-990 and maybe last, the KD/KP-9010. There may have been others, but there’s a lot to keep track of, and this is from my memory, so my apologies if I’ve missed any! Feel free to mention any I’ve missed, or if you own any of these lovely turntables, in the comments.

This series of heavy, well-constructed turntables from Kenwood all feature direct drive. Some are fully manual in operation, like the original KD-600/650, others, like the KD-850, are fully automatic, whilst the KD/KD-990 we are talking about today is auto arm lift only, a nice compromise.

Kenwood KP-990
Kenwood KD-990
The Kenwood KP-990, as she arrived on my bench.

These decks all feature proper quartz lock servo control of platter speed, unlike some direct drive decks that lack a quartz reference. Why is this important? Well, without getting too far into the weeds, quartz crystals generally have lower phase noise (jitter) than the other frequency reference turntables use – the AC mains. Lower phase noise and improved long-term stability translate to better short and long-term speed accuracy, immunity from weird line frequency fluctuations, etc.

These decks also all use the same 2.6kg platter that was originally developed for the KD-600/650, as far as I am aware. The KP-990 certainly does, and likewise, the mat is very similar in terms of size and high quality. This means that accessories developed for the KD-600/650, like the incredible Kenwood TS-10 ceramic turntable sheet, will fit perfectly.

Kenwood TS-10
Kenwood KP-990
My Kenwood TS-10 ceramic platter sheet, purchased as NOS, back in around 2008. Genuinely useful accessories like this significantly improve vinyl playback. This 1.2kg ceramic ‘mat’ is designed to replace your regular mat, increasing inertia and therefore speed stability, and increasing platter damping. Increasing inertia to increase resistance to changes in motion is one of Isacc Newtons laws of motion. It’s the reason why the only really good turntable and platter is a heavy one.

Unlike the original KD-600/650 decks, this KP-990 features a wooden plinth with an internal die-cast aluminium subchassis. This is a nice way to do things and gives enhanced rigidity over, say, a simple wooden chassis like we saw with the similar era NOS Sansui XR-Q7 I unboxed a few months ago.

Additionally, the KP-990 features tactile buttons rather than the capacitive touch sensor of the earlier KD-600/650 machines. I prefer the touch sensor, but that is a technically more complex solution, and the sensors must be kept clean or they have a tendency to misbehave. One of those tact buttons operates a lovely motor-driven arm lift/lower device, giving the smoothest, quietest arm lift and lower I’ve seen in a while. Very nice.

Oh, and the lid and hinges might also be the same as the others in this series, for those chasing lids and hinges. Don’t forget that some parts are being re-manufactured by a small business in Australia – read this to learn more.

Kenwood KP-990 / KD-990 Specifications

Courtesy of Vinyl Engine and HiFi Wiki, adapted by Liquid Mike

Drive system: direct drive

Motor: quartz PLL coreless and slotless DC servo motor

Platter: 330mm aluminium alloy die-cast

Speeds: 33 and 45rpm

Wow and flutter: less than 0.02% WRMS

Rumble: better than -80dB (weighted)

Tonearm: static balance type, J-shape tube

Effective length: 245mm

Overhang: 15mm

Tracking force range: 0 to 3g

Usable cartridge range: 2 to 12g

Dimensions: 490 x 182 x 410mm

Weight: 13.7kg

Supplied accessories: 45rpm adaptor, phono cable, hexagon bar wrench

Year: 1986 – 1987

Original retail price: 890 DM / $499 USD / $800 AUD

Service

This Kenwood KP-990 came to me almost straight from Japan, recently purchased by one of my customers. He was worried that there might be problems with this one, and there were a couple, but they were minor and easily resolved. The deck lacked a cartridge but came with its original Kenwood headshell. I suggested a nice Audio Technica AT-OC9 moving coil cartridge as a great option here.

Let’s dive into this one!

Kenwood KP-990
Kenwood KD-990
Taking my first proper look at the Kenwood KP-990, we need to do some deep cleaning.
Kenwood KP-990
Kenwood KD-990
You’ll see that better in this image, but the great news is that almost nothing is broken and everything is complete.
Kenwood KP-990
Kenwood KD-990
I say almost nothing is broken – you can see the power on/off switch ‘cap’ has come away from its base. This is easily repaired.
Kenwood KP-990
Kenwood KD-990
Here’s a close-up of that minor damage. The rest of the wooden plinth is in surprisingly good condition.
Kenwood KP-990
Kenwood KD-990
And here is that switch after repair. I doubt anyone could tell this has been repaired.
Kenwood KP-990
Kenwood KD-990
At this point, I’ve given everything a really good clean, and I think you can see that a layer of dust and grime has been lifted.
Kenwood KP-990
Kenwood KD-990
The chassis and bottom cover don’t exude quite the same build quality as the earlier 600/650 series machines, but this is the way things were going by this point, and production costs had to be reduced. Kenwood thoughtfully provided additional screw holes in case careless technicians overtightened the self-tapping wood screws that hold the bottom cover in place. This damage is incredibly common. I have a solution to this problem that salvages damaged screw holes and makes them like new again, but in truth it should never be needed.
Kenwood KP-990
Kenwood KD-990
These feet will be carefully cleaned before being reinstalled. Note their shock and vibration-absorbing design.
Kenwood KP-990
Kenwood KD-990
One of the great things about owning Japanese equipment in Japan is that it can be sent to the factory for official maintenance. That’s what this sticker shows, and it is great to see. This KP-990 visited the Kenwood factory back in 1994, courtesy, no doubt, of a very sensible owner.
Kenwood KP-990
Kenwood KD-990
Here’s a nice plan view of the internal layout of the KP-990. You’ll note the four-legged diecast spider assembly, to which the arm and motor are connected, adding great rigidity. The motor controller circuit board is mounted directly to that, visible here. Above that board, you might spot the motor drive transistors and what looks like a regulator or two. Can you spot the problem related to the transformer?
Kenwood KP-990
Kenwood KD-990
The rubber transformer mounts, which decouple the transformer from the wooden chassis, have decomposed, allowing the transformer to rattle around inside the chassis. It is fortunate that nothing was seriously damaged, though you can see where it has been rubbing on the inside right edge of the chassis, and someone has tried to glue the transformer to that inside edge, which was silly. New mounts are needed that will allow the transformer to move in a constrained fashion, as it was designed to.
Kenwood KP-990
Kenwood KD-990
And here are those mounts, one of them here anyway. These two new mounts allow the transformer to hang decoupled as it should be, but restrained from swinging around wherever it might want to, which we absolutely do not want. Whilst I had access, I carefully re-torqued fasteners, removed some polychloroprene glue, and checked electronic adjustments.
Kenwood KP-990
Kenwood KD-990
Getting to the sharp end now. I’ve cleaned, fixed and adjusted everything that needed attention, washed the mat, and now it’s time to fit a nice new moving coil cartridge to this lovely tonearm. Here, I’ve recommended, supplied and am about to install an Audio Technica AT-OC9XEB.
Kenwood KP-990
Kenwood KD-990
The entire OC9 series are some of my favourite affordable moving coil cartridges. The XEB variant is a great value at under $500 AUD, now discontinued, I believe, but still available if you look around. It works very nicely on this tonearm from a technical perspective, and it sounds absolutely lovely. This is unbeatable for the money, IF you have the necessary gain, and you should! A deck like this deserves a low-output moving coil cartridge, for a variety of sound technical reasons.
Kenwood KP-990
Kenwood KD-990
Beautiful! The Kenwood KP-990 has fully adjustable VTA as all good tonearms do, so it was a snap to dial in the vertical tracking angle, after setting overhang, azimuth, tracking force and anti-skate. I should mention this arm features a lovely anti-skate device, too. It’s a very smooth arm, better than the arm on the KD-650, for example.
Kenwood KP-990
Kenwood KD-990
And, of course, no deck escapes my workshop without being listened to! Somebody asked me if I listened to every piece of equipment the other day, as though you could ever hand back a piece of audio equipment without listening to it! I can only assume that some actually don’t listen to things before handing them back. How one could operate a business like that, I have no idea.

Results

Vladan, the owner of this beautiful Kenwood KP-990, was thrilled to hear the good news about his turntable, and he deserves that good news. I’ve been helping Vladan acquire some Accuphase equipment, and he now has an Accuphase A-60 and a C-280L, which he loves. I’ve also been helping him recover from a notorious equipment butcher…

Kenwood KP-990
Kenwood KD-990

Vladan used to live on the East Coast and, like many, Vladan sadly fell victim to an ACT business and ‘technician’ we’ll call ‘Mr Frampton’. Cramp… ah, I mean Frampton is infamous for case #4, the Krell KRC preamp, in the Hall of Shame, and case #17 involving a Marantz 2270, which belonged to Vladan. *

I was able to rescue the Marantz 2270, a Framptoned Marantz 2330, and a couple of other ruined pieces for him, with the result that he was able to sell them to happy customers, with a clean conscience. Knowing this, you’ll understand why I’m especially happy to be able to give Vladan good news, like I could here, with this lovely KP-990.

Kenwood KP-990
Kenwood KD-990
Yeah, baby, now THAT’S a turntable! It’s a shame about the yellowed lid, but he can always purchase a new custom-made lid. My supplier of choice is IntoVinyl, in Holland. Here is a link to a new KP-990 lid.
Kenwood KP-990
Kenwood KD-990
Messy work area, I really need to do a major tidy up in here.

The KP-990 sounds taught, rhythmic, quiet and relaxed as all good direct drive turntables should. Pitch is dead-nuts on and stable, another DD trait. No, “She’s within 1% of the correct running speed”, which is considered normal with some audiophile brands, and I use the term audiophile loosely.

Resolution of fine detail is really decent with this AT OC9 MC cart, but obviously a more expensive variant, such as my favourite OC9XSL is what I would recommend here as a step up from where we are, and really as a starting point if one can afford it.

Kenwood KP-990
Kenwood KD-990
I love that the deck came with its original Kenwood headshell, too, because it matches beautifully in an aesthetic sense, and it’s a decent headshell. The next step here would be a much better headshell, perhaps a vintage FR or Supex, or a new LH-2000, and a higher-grade cartridge.
Kenwood KP-990
Kenwood KD-990
A lovely looking and solidly built turntable, worthy of use in a range of good systems.
Kenwood KP-990
Kenwood KD-990
And just think, you can pick these turntables up cheaply, mostly because there is little written about them and people likely don’t realise what nice decks they really are. You could grab one of these for a grand these days, maybe a bit more.
Kenwood KP-990
Kenwood KD-990
Highly recommended!
Kenwood KP-990
Kenwood KD-990
AT-618A
Upon collection, I also supplied the customer with an Audio Technica AT-618A record clamp, which will further improve performance.

So that’s another lovely Japanese turntable saved and another happy customer – my ideal clean sweep and what I aim for with Liquid Audio. As a turntable for those looking for a steop up from the usual entry level machines, I highly recommend anything in this Kenwood direct drive series from the KD-600, right the way through to the KD/KP-990 we see here.

Blood Incantation…

I know, I know, three of you want to know how the Perth Blood Incantation show was. In a word – EPIC! If you dig heavy music or are interested in music more broadly, and have an opportunity to see this great metal band from the USA, I highly recommend it.

Blood Incantation
H E A V Y !
Blood Incantation
That’s some heavy BC Rich guitar work going down, and some insane drumming.
Blood Incantation
Paul Riedl giving us some deep metal growls
Blood Incantation
🙂

Thanks!

As always, thank you for visiting, I hope you enjoyed this article and found it informative. If you’d like me to look at your Kenwood KP-990, KD-600, 650 or any other lovely Kenwood turntable for you, don’t hesitate to contact us.

Sidenote: As you know, very little original, quality content like this exists, which is partly why I go to the effort of creating it. I was recently asked: “Who pays you to write these articles?” My surprised reply was “Nobody!”, though that would be nice!

This site is 100% independent, ad-free, and everything is created by me, in my time, and at my expense. People can support us in various ways, including commenting, liking, sharing, subscribing, and donating using the button in the footer. Recent donors are listed in the sidebar/footer. Tell your audio friends because it helps me, which helps you!

* Should we protect these businesses, or name and shame them? I believe people have a right to know the truth.


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10 thoughts on “Gorgeous Kenwood KP-990 Turntable Service”

  1. Dear Sir,you are the great saviors of these gadgets of golden era.Nirmslly people just don’t care to keep these electronic items with care .Some serious listeners and techies like you do the juice jobs to restore tgese beautiful gadgets of golden period.I will definitely go for this TT or for the last time you repaired. Thank you very much for inspiring us to believe in these nice gadgets.Keep these things going for zither 30 to 40 years.

  2. Great article Mike, I love my KP-990 it’s my back up turntable, I’ll need to book a call as I’m looking at trying another cart on it

  3. Hi Mike,

    I’m am very grateful to come across your article. I just acquired a very unique NOS version for this turntable and while awaiting for its arrival I was preparing myself, reading the history, and engineering of the turntable. Diving across all the available information as well as utilizing AI – your article really stands out with accuracy and great images. So Thank you very much! Once I have everything setup I’ll make sure to share my experience here!

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