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Hacking a Luxman Integrated

One cool and often under appreciated feature in Luxman integrateds is the "Separate" button. It disconnects the preamp from the amplifier, allowing for a number of approaches. Actually this is two features. One is the always active preamp output available on the back.

The second is the ability to feed the amp directly, bypassing everything in the preamp. Useful features:
  • Add room correction/EQ/active crossover in the middle.
  • Passively bi-amp (without using separate)
  • Feed a subwoofer (without using separate)
  • Use amp for home theater
  • Use ~ 0.047uF cap to add a high pass to your Luxman, letting you feed a sub for everything below 80 Hz.
  • Use ~ 1uF or higher to add some flavor to the sound. 
It has me thinking about using it with my sub for 2 channel again. :)


Best,

E
erik_squires
erikt
268 posts
 
What about connecting the pair of SB3000’s to both the Denon and the Luxman?

Subwoofer output from the Denon to each of the LFE inputs on the subs, the Left line level from each of the Luxman preouts? (Sub 1: Luxman Left preout, Sub 2: Luxman Right preout).

When using the Denon in HT Mode, the Luxman will be in Separate mode and the Luxman preouts will be disabled and the subs will be driven/controlled by the Denon’s subwoofer out.

When using the Luxman for music, sources will be directly connected to the Luxman, the Denon turned off and the subs will be driven/controlled by the Luxman preouts.
adamwheel's avatar
adamwheel
9 posts
 
That's a good thought.

I was also thinking of using speaker B outs on Luxman with  a speaker level to line level converter then rca to the subs.

Speaker B out of Luxman can be turned on and off as needed as I understand it.
adamwheel's avatar
adamwheel
9 posts
 
Are you sure the pre-outs are disabled when in separates mode?
adamwheel's avatar
adamwheel
9 posts
 
I read they were still  "active" in the original post.
erikt
268 posts
 
I had a discussion on this with Luxman USA via email.

If there are no active signals connected to the preamp side of the Luxman while in Separate, then the preouts will be silent.

So, if using the Luxman in "HT Mode" by way of using the Mains In connection on the Luxman from the preouts of the AVR, then when in Separate there will be no signal on the preouts (meaning the Main In signal from the AVR preouts will not be sent back to the Luxman preamp section and then on to the Luxman preouts).
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