Doc modding Marantz imperial 7

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Vinyl-ant
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Re: Doc modding Marantz imperial 7

Unread post by Vinyl-ant »

Laminate up a cube using squares of ply or whatever, cut square or round holes in the inside layers so that you have a chamber inside, them stick the cube on a lathe to round it off into a sphere with six flat faces.
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karatestu
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Re: Doc modding Marantz imperial 7

Unread post by karatestu »

Yeah, I had thought of something similar but I don't have a lathe :crying-yellow: :crying-yellow: :crying-yellow:
DIY inspired by Richard "The Doc" Dunn RIP

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Fretless
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Re: Doc modding Marantz imperial 7

Unread post by Fretless »

karatestu wrote:
Fri Nov 13, 2020 7:04 pm
Yeah, I had thought of something similar but I don't have a lathe :crying-yellow: :crying-yellow: :crying-yellow:
Got a tractor, Stu?

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karatestu
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Re: Doc modding Marantz imperial 7

Unread post by karatestu »

Genius :grin:

I got a tractor, yes. Need to get the back wheel off :grin:
DIY inspired by Richard "The Doc" Dunn RIP

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Fretless
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Re: Doc modding Marantz imperial 7

Unread post by Fretless »

Alternative method:

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NVA: P50sa - SSP - A40 - LS6 - Cube2 - BMU
Digits: E-Medic ST-M PC + Volumio + AQ Jitterbug
DAC: TeraDak V4.5 Chameleon CD: Cambridge CXC
USB: Oehlbach XXL Masterclock + DH Labs Mirage
Ethernet: Silent Angel Bonn N8 + AQ Cinnamon
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karatestu
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Re: Doc modding Marantz imperial 7

Unread post by karatestu »

Brilliant :lol: The power take off is one of the most dangerous parts of a tractor though :shock:
DIY inspired by Richard "The Doc" Dunn RIP

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Re: Doc modding Marantz imperial 7

Unread post by karatestu »

How about something like this to attach the tweeter "dice" to ? :lol:

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The ultimate in flexibility :dance:
DIY inspired by Richard "The Doc" Dunn RIP

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Re: Doc modding Marantz imperial 7

Unread post by karatestu »

Quote of the week

"Slot loading effectively increases cone mass, which reduces fs and increases Qts. Sensitivity is also decreased. Air volume between cone and slot should be as small as possible, to avoid screwing up the frequency response at higher frequencies (say above 300 Hz for a 15" woofer)."

Reducing Fs always gets my attention :ugeek: . Not sure I want to increase qts in my case - bigger box required. Don't like the bit about sensitivity.

I am not even sure what I have at the moment is even classed as slot loading. Maybe more a very crap horn with very bad cone to horn interface . Who knows. More research required.
DIY inspired by Richard "The Doc" Dunn RIP

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