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  #1  
Old 07-29-2011, 08:08 AM
TheAppleChap TheAppleChap is offline
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Official Fix for Pro-ject Turntable rumble now available

The "S/E Upgrade Kit" from Pro-ject has now been launched that will put to bed, once and for all, any problems with low level rumble noise on affected Pro-ject turntables.

The kit comprising a replacement pulley and belt and rubber isolating grommets and screws costs £25 and is available from Henley Designs in the UK. It may also be available from your local Pro-ject supplier.

I was given access to the kit two days ago and the installation was simple, taking less than ten minutes and should be easily doable for anyone able to wield a screwdriver.

I have written an instruction guide and posted a full review on my blog at :

http://www.theapplechap.com/TheApple...Hz_rumble.html

Henley Designs describe the fix as "These simple additions help decouple (isolate) the motor from the turntable plinth. By doing this, unwanted vibrations from the motor are dramatically reduced, allowing the sub-platter to spin truer, and the tonearm to transmit the sound signal better."

Enough to say that on my turntable there was a complete removal of ALL low level rumble, shoring up the bass, making it deeper and more controlled.

I would thoroughly recommend this kit to all Pro-ject owners with compatible turntables.

I'm grateful to Henley Designs for agreeing to lend me the necessary parts and let me review them and post the article on my blog. I have no professional relationship with Henley Designs and had a free hand to write the article. Therefore all errors and omissions are mine and mine alone.

Cheers

Alan
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  #2  
Old 08-02-2011, 09:58 PM
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SteveinMN SteveinMN is offline
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As a Pro-Ject TT owner, I thank you very much and bow in your general direction. :-)
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  #3  
Old 08-03-2011, 12:09 AM
avole avole is offline
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Can't help feeling Pro-ject have come very late to this and it has done some damage to their reputation.

I sold on my Debut III some years ago because of the high level of motor noise, as I suspect others have too, and have been recommending against the cheaper Pro-jects since. I also think it's expensive since the problem was a design fault - if it were an automobile, this would have been done in a recall for free.

Is this now a standard modification for all their cheaper decks?
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  #4  
Old 08-03-2011, 01:08 AM
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Mr. Lin Mr. Lin is offline
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Quote:
Originally Posted by avole View Post
Can't help feeling Pro-ject have come very late to this and it has done some damage to their reputation.
I agree. But is this even officially from Pro-Ject?

Even my RM-5 has this issue when played at 45rpm. I didn't notice it for a long time because it's not that loud, and I don't often play records at that speed. I'll probably look into this kit, the sonic strengths of the RM-5 make it well-worth keeping, and spending an extra $25 or so.
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Old 08-03-2011, 04:01 AM
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drknstrmyknight drknstrmyknight is offline
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I wonder if this would help out Music Hall's MMF5?
I believe they share components with the Projects
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Old 08-03-2011, 06:45 AM
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eteller eteller is offline
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Personally while I feel Pro-Ject should be offering this as a FREE retrofit for all existing owners, two blobs of sticky tack rendered mine silent. Nice work BTW Applechap!
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  #7  
Old 08-05-2011, 08:28 PM
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Quote:
Originally Posted by eteller View Post
Personally while I feel Pro-Ject should be offering this as a FREE retrofit for all existing owners, two blobs of sticky tack rendered mine silent. Nice work BTW Applechap!
Hmm, I tried silencing mine with some extra Herbie's db Neutralizer material, and it didn't seem to help at all.

I've just set up my RM-5 for the first time in about one and half years. Listening with headphones, a little bit of the rumble/surface noise is audible even at 33 rpm. My Thorens has it beat in that department, but in detail, refinement, resolution, and natural sound, the Pro-Ject wins (same cartridge being used btw).
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Old 08-05-2011, 08:47 PM
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Whoops - just realized a minute ago I forgot to level the tt. That got right of a good portion of the hum/noise.
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Old 08-06-2011, 09:01 AM
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Ant1-Hero Ant1-Hero is offline
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Looks like its only available in the UK
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  #10  
Old 08-10-2011, 04:56 PM
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gvalent gvalent is offline
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A little late on this one!

Too late for me.
I unloaded my Project TT awhile back because of the motor hum issue. This was the most annoying piece of audio equipment Iíve ever purchased.
I lost all respect for Project gear and Sumiko, the most worthless distributor of product Iíve ever been involved with.
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Old 08-10-2011, 08:52 PM
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Quote:
Originally Posted by gvalent View Post
Too late for me.
I unloaded my Project TT awhile back because of the motor hum issue. This was the most annoying piece of audio equipment Iíve ever purchased.
I lost all respect for Project gear and Sumiko, the most worthless distributor of product Iíve ever been involved with.
I'm going to ignore that comment (just kidding ). Remind us which Pro-Ject turntable you had?
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  #12  
Old 08-10-2011, 08:59 PM
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Bob_in_OKC Bob_in_OKC is offline
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Quote:
Originally Posted by drknstrmyknight View Post
I wonder if this would help out Music Hall's MMF5?
I believe they share components with the Projects
This fix is for the turntables with the motor suspended on a resilient ring, which would not include the MMF-5. I once owned an MMF-5 and it didn't have this particular problem, which made me wonder if Pro-Ject wouldn't be better off mounting that motor the same way Music Hall did.
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  #13  
Old 08-10-2011, 09:43 PM
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Quote:
Originally Posted by Bob_in_OKC View Post
I once owned an MMF-5 and it didn't have this particular problem, which made me wonder if Pro-Ject wouldn't be better off mounting that motor the same way Music Hall did.
If I understand it correctly, I think the kit bypasses the motor suspension altogether.

I just finished a new thread topic that's very relevant to this discussion:

http://www.audiokarma.org/forums/sho...d.php?t=386585



...
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  #14  
Old 08-10-2011, 11:23 PM
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Bob_in_OKC Bob_in_OKC is offline
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I would guess this fix could be accomplished with a few silicone grommets and no special kit. You could put two silicone grommets under the flanges of the motor, put two more grommets and maybe two washers on top of the flanges, re-install the transport screws (not too tight). The round belt and alternate pulley might be a slight upgrade, but don't look essential. Cost of a small pack of grommets would probably be under $5.
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  #15  
Old 08-11-2011, 12:59 AM
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gvalent gvalent is offline
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I had an Xpression lll.
I noticed the hum after about six weeks. I couldn't get it out of my head after that.
It was really annoying listening to classical music..... Bulgarian death metal...not so much.
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