My Luxman Integrated has AC Inlet Envy


I love my Luxman 507ux, it does so many things right, so soon after I got it I built a shielded power cable as an upgrade to the relatively plain cable that came with it.

To make a long story short, after trying out a number of different cables and female IEC plugs it seems the AC inlet has prongs which seem too short. For sure, the Luxman has no ground pin. I'm sure that this means it's not required, so that’s not an issue. What is an issue is that even a Wattgate plug, which are famous for a tight grip, can’t stay in. Even a little wiggle can disconnect the amp.

It seems either or all of these are true:

  • The missing ground pin is keeping plugs from feeling very grippy
  • The pins are too short
  • The pins are too thin

If I play with a cheap power cord, it seems like the AC doesn’t connect unti lthe very last 2 mm of travel of the plug. This seems wrong.

I bought a cheap replacement inlet and it just feels so much better. Meaning, I can feel the plug grip the pins much earlier, and they all grip much better.

Anyone else have issues with Luxman inlets??

 

PS - I absolutely insist on building my own power cables. This is my hobby not yours so please stop trying to convince me my problem is that I didn’t buy your boutique brand.

 

erik_squires

@imhififan  No, but again, it's not just about how easily it pulls out, but how good a contact it makes.  :)

I could use superglue if I wanted, doesn't make the metal to metal contact any better.

@erik_squires Wrote:

@imhififan  No, but again, it's not just about how easily it pulls out, but how good a contact it makes.  :)

I agree, all non locking IEC will not make a good electrical contact because they arc. IME, the money audiophile amps cost they should have locking IEC for the AC mains. 😎

Mike 

Replace the inlet is the only solution. Use a 3 prongs and leave the ground pin unconnected.

I could use superglue if I wanted, doesn’t make the metal to metal contact any better.

@erik_squires

The IEC LOCK+ is utilize a metal plate at an angle to clamp the ground pin. However, you may not need it if the replacement inlet is good enough.

Anyone else have issues with Luxman inlets??

BTW, the Luxman 507 photo that I posted earlier could be an aftermarket IEC socket.

I hope my responses make sense.😉

I did have such problems but not with Luxman.  One intermittent drove me crazy.  The receptacle had a pin break loose and would be push inward as the plug was inserted.  But the pin would be pull back outward when the plug was removed.  Visually it looked okay.

Since you make your own power cables and have already Replaced the inlet receptacle, this should not be a problem for you to perform.  But you have to have a lot of commitment to the cord you are using. 

If it does not Feel Right, I bypass the inlet receptacle altogether and hard wire the power cord straight to the power supply circuit board or wherever those wires from the inlet receptacle go to.

@erik_squires there is no ground pin on the IEC inlet of my L-590AXII. Just two pins. Perhaps try a power cord which can stay firm inside the inlet of your L-507UX? There's no issue with my Acrolink cord staying put inside the inlet.