Marantz Model 6300 Turntable Service & Review

It’s a privilege caring for the amazing hi-fi gear, brought to Liquid Audio for service and repair, but every so often, I work on a piece that really makes me smile. The Marantz Model 6300 direct-drive turntable is one of them.

One look at a Marantz Model 6300 and you’ll reach an inevitable conclusion – that you want and need to find one to add to your collection. That’s exactly what happened with the owner of this very pretty unit. Surely, the Model 6300 is one of the best looking turntables from the entire 1970s.

It features some of the classic styling elements so typical of Marantz equipment from this era, including the Marantz font, mixed wood and metal finishing and elaborate feature designation on the front fascia.

More Information

The Marantz Model 6300 is a direct-drive deck, with moderate specs, not high-end, but certainly no slouch. In terms of other brand decks, I put the Model 6300 on a par with the Kenwood KD-500 / 550, Rotel RP-3000, Denon DP-30L, JVC QL-F4, and others. It’s close to but not quite as nice as the Kenwood KD-600 and KD-650.

The Vintage Knob has more information on the Marantz Model 6300. Another good source of information is Classic-Audio’s Model 6300 page.  Also, check out the short video I made about the Marantz Model 6300. Finally, Vinyl Engine has more and is the source of these:

Specifications

Tonearm: S-shaped
Effective length: 231mm
Overhang: 15mm
Stylus pressure: 0.5 to 4.0g
Motor: Servo controlled direct drive
Speeds: 33.33 and 45rpm
Speed control: +-3%
Rumble: -60dB
Wow and flutter: 0.04%
Platter: 31cm
Platter weight: 1.6kg
Dimensions: 435 x 180 x 381mm
Weight: 10.0kg

Proper Turntable Service

This unit belongs customer who wanted her properly serviced and set-up. Sadly, and all too often, decks come to me poorly set-up, even after having been to other repairers.

A Liquid Audio turntable service involves a thorough cleaning of the lid, chassis, platter, mat, tonearm, stylus and headshell. I also clean and lubricate all deck mechanics, motor/spindle bearing, switches and controls, hinges, accurately set cartridge alignment, azimuth, tracking force and anti-skate.

Naturally, I also assess the correctness of the match between tonearm, cartridge and headshell. In this case, advised the owner that he should also consider adding a better cartridge and headshell, but at this stage he just wanted her serviced.

Obviously, there’s much more to a turntable service than cleaning the stylus and checking the tracking force, so beware! Anyway, let’s step through this process, in pictures, starting with:

The Chassis

I love the look of the Marantz Model 6300. I think the combination of walnut veneer and brushed aluminium works incredibly well.

The Marantz Model 6300, as she came to me, prior to cleaning or any other work. Note the roll of paper in the background. Contrary to its appearance, this is not a roll of toilet paper! It’s actually a high-quality lint-free paper towel I use when cleaning and servicing hi-fi equipment.
Here I’m getting ready to pull the old girl to bits. The lid, mat, platter, headshell and covers all come off as part of a proper Liquid Audio service.
The tone-arm bearings of this 6300 needed a little attention. Here, I’m using a precision German Wiha screwdriver to make small adjustments to the horizontal bearing free-play. Ill-fitting screwdrivers will make a mess of these bearing adjustment screws. Note the anti-skate mechanism. I like this arrangement, where a weight pivoting on a shaft acts against a rod. No nylon monofilament thread to get tangled, or break.
The 6300 stripped and ready for an intensive chassis clean and further work.
Platter, mat and headshell to one side, they receive individual cleaning/adjustment.
The special foaming cleanser I use, or any good cleanser, helps to remove accumulated dirt and oils, built up over the years.

The Motor

The Model 6300 motor appears similar to those used in many other decks from this era. In this case, it may be shared amongst other models and appears to have been slightly hobbled for this deck. A closer look shows only two of its possible four wiring phases are wound with wire, and two additional poles are missing. Whether all four poles/phases were present in other versions of this motor, I don’t know.

Once the chassis and surrounds are clean, it’s safe to have a closer look at, and service, the bearing. I’m holding the rotor, stator is visible in the background.
The rotor from a different angle. Note the largely unblemished bearing surface, and the recessed, roughened mid-section, that holds some of the bearing lubricant. It’s important to ensure this section is adequately lubricated before reassembling the motor.
A better view of the motor, minus the rotor. Centermost is the bronze bearing insert. This is often referred to as ‘oilite’ material and is impregnated with oil from the factory. It’s typically supposed to be maintenance-free, though I doubt Marantz or anyone else figured that great decks like these would still be working 40+ years later. Therefore I always clean and apply oil.
Close-up of the stator and bearing sections of the motor. Note the Teflon thrust pad at the bottom of the bearing well. I carefully cleaned this with lint-free materials to ensure a free-running, and therefore quiet, bearing. Note also that Marantz has wired the motor up with only two of the four possible winding phases – green and gold. There are two additional and unpopulated set of poles and a winding phases, left out presumably to save some money in this model.
I’ve included these shots though to show that Marantz were still working to some excellent tolerances. Note that both the rotor and stators are sized for correct fit, with the grade printed on rotor and stator, in the form of two ‘+3’ markings in this case. These were hand-matched to a particular tolerance grade at the factory.
Correct rotor for this stator/motor, based on production tolerance testing. See if you can find this attention to detail in modern turntables. Anyway, the bearing is now clean and contains the correct amount of synthetic bearing oil.

The Electronics & Mechanics

I really like the physical layout of this deck. Even the parts you can’t easily see underneath are thoughtfully laid out and trimmed.

The layout of the Model 6300 is extremely neat. Bottom left is the power supply filtering and regulation, plus the mechanical arm position switching and speed controls. Top left you’ll notice a couple of solenoids and other arm controls. A small transformer is located to the top right, with the motor in the middle.
Master speed controls, on the bottom plastic cap the motor.
Two diode bridges, some good quality and decently sized capacitors, a series pass regulator transistor and miscellaneous other parts from the 6300 power supply.
Microswitches, levers, pivots, potentiometers. Everything here needs attention. I cleaned and lubricated everything you see here, as part of the comprehensive service this deck received. Note the thickness of the high-density particleboard plinth/chassis.

The Serviced Model 6300

I was sad to say goodbye to this gorgeous deck, but her owner is very happy and after service and a precision set-up, she played a record more quietly and with lower wow & flutter.

Ready for her first power-up, post service. Still some arm adjustments to complete.
This Marantz Model 6300 now looks a million bucks and is ready for her final arm set-up and test.
I lightly oiled the wood veneer after cleaning. Hopefully, that shows up here.
The name badge as it originally came to me.
Nice clean name badge!
And the tone-arm pivot assembly before proper cleaning…
And after cleaning, a big improvement. The last thing to do here is to finish set-up of the arm lifter, which needs a positional adjustment. Otherwise, the job is complete!

I hope you’ve enjoyed this look at and service overview of the Marantz Model 6300 direct-drive turntable. Don’t forget, Liquid Audio is a turntable specialist. Get in touch with me for all your turntable service and repair needs and to book in some turntable TLC for your deck!

Marantz Model 6300

$750 - $1500 AUD
8.4

Chassis/Build Quality

9.0/10

Features

8.0/10

Sound Quality

8.0/10

Scalability

8.0/10

Bang-Per-Buck

9.0/10

Pros

  • Stunning appearance
  • Excellent build quality
  • Decent tonearm
  • Very serviceable

Cons

  • Not the heaviest platter in its class
  • Hard to find in Australia

10 thoughts on “Marantz Model 6300 Turntable Service & Review”

  1. Hi Mike! Although I don’t own a Marantz 6300 it was a pleasure reading your Service Routine on One. What A Beautiful Turntable and How Thorough You Are. It’s Awesome to See Someone Loving What They Do.

    1. Hi Layne and thanks for leaving such a positive comment! I agree these are lovely turntables and definitely one of the nicest Marantz made. I love working on all Japanese turntables from this golden era.

  2. Nice to take part in your work.
    I bought a 6300 at the end of the 70’s. Got it now after 20 years of storage. Want to start playing vinyl again.
    I notice it needs maintenance.
    Can you give me examples of good cleaning products inside and outside and a suitable lubricant.
    Mention that I had 6300 connected to the Marant 4400 via the Marantz CD-400B which gave a wonderful sound.
    Regards Anders

    1. Hi Anders, thank you for the coffee, much appreciated! I’m often asked about the products I use. There are many and it varies according to the equipment, the job etc. A good foaming cleanser works well on many surfaces like lids and chassis parts. Mr Sheen is a silicone-based foaming cleaner and it is also good for lids for example. Window cleaner also works quite well for general cleaning duties. For wood, I recommend a specialty wood cleaner, I use a wood soap, followed by beeswax or specialty wood oil like cedar oil. The lubricant side of things is also complicated, but for small mechanical parts, I use synthetic or mineral-based machine oil, depending on the application. For bearings, again it varies but a 30 weight synthetic oil is a good option and would work well here. Cogs and gears usually get a dose of light-weight synthetic grease. Brands etc vary according to region. Correct setup with an appropriate cartridge, good stylus, correct VTA, azimuth, overhang, tracking force and anti-skate is critical and the part most tend to get wrong, so spend some time on that part and seek expert help if you are unsure. Those things make all the difference to performance, along with getting that servicing stuff right.

  3. I have 2 Marantz 6300 turntables just had them both serviced had the stylus replaced with a Grado Red2 Diamond stylus was this a good match

    1. Hi David, thanks for your question and how are you? When you re-read your question, does it occur to you that anything might be missing in terms of how you’ve written it..?

    1. Hi Dan, this very much depends on my customer’s budget, the rest of the system, whether there is the capability to work with moving coil cartridges and so on. in general terms though, the arm is low to medium mass and therefore needs a medium to high compliance cartridge to work with.

  4. Stellar work as always sir!
    You make me wish I had pursued a career in electronics in my youth.

Feel free to share your thoughts and leave a comment!