• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

The Luxman M-4000 - An Absolute Unit!

Connor G

Connor G

Ear conditioned
Subscriber
Hey everyone!
I brought my M-4000 out from hiding to do some maintenance and cleaning. I haven't seen many HQ photos of the internals online, so I was more than happy to take some and share.
These amplifiers are really something special. Everything oozes quality, from the beautiful VU meters, to the coke can sized filter caps, to the honeycomb cast aluminum heat sinks on the back. This particular amplifier seems to have had little to no usage before I acquired it. The PCB sockets, which are notorious for melting after many hours of use, don't have any signs of heat damage. The inside is also as clean as can be. This amp hasn't skipped a beat since I won it on eBay 2 years ago, for extremely cheap.
Let me know what you think and thanks for looking!

IMG_2582.JPG IMG_2583.JPG IMG_2581.JPG IMG_2521.JPG IMG_2529.JPG IMG_2524.JPG IMG_2531.JPG
 
Register to hide this ad
Lovely, classic power amplifier. And in very nice condition. :)

HackWhite said:
to the honeycomb cast aluminum heat sinks on the back
Click to expand...

But square honeycomb? Must be mutant bees...

upload_2019-7-15_17-42-28.png

Pioneer did honeycomb heatsinks, and chassis and feet- they were obsessed with its 'anti-vibration' properties:

upload_2019-7-15_17-44-15.png

Even stamped the chassis with honeycomb and the feet themselves had moulded hex shapes inside.

feet.JPG
 
Very nice pictures HW. I was actually very close to moving mine along due to a move and downsizing
but in the end decided to keep it and have it gone over.

Very glad I did. BTW I have the comprehensive owners manual.
 
We like comprehensive, sure be nice if you could scan it and make it available.
totem said:
Very nice pictures HW. I was actually very close to moving mine along due to a move and downsizing
but in the end decided to keep it and have it gone over.

Very glad I did. BTW I have the comprehensive owners manual.
Click to expand...
 
restorer-john said:
Lovely, classic power amplifier. And in very nice condition. :)



But square honeycomb? Must be mutant bees...

View attachment 1563022

Pioneer did honeycomb heatsinks, and chassis and feet- they were obsessed with its 'anti-vibration' properties:

View attachment 1563023

Even stamped the chassis with honeycomb and the feet themselves had moulded hex shapes inside.

View attachment 1563025
Click to expand...
Anti-resonant everything was the mantra of the higher end Japanese gear of that era. I really like the outcome.
 
What just a mention of the fad VU meters without even a nod to the row of power LEDs below the meters? Unlit a few weeks ago I thought the use of both was just Luxman but apparently another amp did the same. I like that idea, seeing metered power and peak with LEDs so you don't overdrive the amp.
 
Hello !

You talk about M4000 or M4000A ?

M4000A.JPG

M4000 bipolar output power transistors
M4000A Mosfet output power transistors

:thumbsup:
 
Since the numbers of A's produced were few and far between and I can't recall seeing one in N.A.
we can guess its not a Mosfet A.

While on the topic of M4000 A or otherwise are there internal voltage taps for foreign markets
was never able to confirm.
 
I could understand honeycomb being utilised in a tuner. Obliviates the requirement for a separate antenna...
 
Tough Crowd! Nice Luxman Power amp!
Regards,
Jim
 
HackWhite said:
Hey everyone!
I brought my M-4000 out from hiding to do some maintenance and cleaning. I haven't seen many HQ photos of the internals online, so I was more than happy to take some and share.
These amplifiers are really something special. Everything oozes quality, from the beautiful VU meters, to the coke can sized filter caps, to the honeycomb cast aluminum heat sinks on the back. This particular amplifier seems to have had little to no usage before I acquired it. The PCB sockets, which are notorious for melting after many hours of use, don't have any signs of heat damage. The inside is also as clean as can be. This amp hasn't skipped a beat since I won it on eBay 2 years ago, for extremely cheap.
Let me know what you think and thanks for looking!

View attachment 1563014 View attachment 1563015 View attachment 1563016 View attachment 1563017 View attachment 1563018 View attachment 1563019 View attachment 1563020
Click to expand...
This is what we did to my M-4000 when it started acting like it was sick. incredable unit.
 

Attachments

  • Luxman connector failure.jpg
    Luxman connector failure.jpg
    54.9 KB · Views: 144
  • M4000 Re-wire.jpg
    M4000 Re-wire.jpg
    83.9 KB · Views: 139
Connor G said:
Hey everyone!
I brought my M-4000 out from hiding to do some maintenance and cleaning. I haven't seen many HQ photos of the internals online, so I was more than happy to take some and share.
These amplifiers are really something special. Everything oozes quality, from the beautiful VU meters, to the coke can sized filter caps, to the honeycomb cast aluminum heat sinks on the back. This particular amplifier seems to have had little to no usage before I acquired it. The PCB sockets, which are notorious for melting after many hours of use, don't have any signs of heat damage. The inside is also as clean as can be. This amp hasn't skipped a beat since I won it on eBay 2 years ago, for extremely cheap.
Let me know what you think and thanks for looking!

View attachment 1563014 View attachment 1563015 View attachment 1563016 View attachment 1563017 View attachment 1563018 View attachment 1563019 View attachment 1563020
Click to expand...
 
You must log in or register to reply here.
Back
Top Bottom