Monitor 7B upgrades

F1nut
F1nut Posts: 50,647
edited March 2017 in DIY, Mods & Tweaks
Since I decided to keep these of course I had to upgrade them. Pretty much the standard crossover mods, but with all point to point wiring. I removed the fuse and used a 4.7uf in place of the 4.5uf to compensate. I also upgraded the chassis wire and terminated them with gold plated copper fastons. In addition, I installed new binding post plates from Trey, hence the fuse removal, along with new binding posts and a full set of Larry's rings.

I noticed afer I drilled out the rivet attaching the fuse holders to the plate and removed them that the two wires coming off the holders has serious oxidation, which has to affect the performance. If you are considering upgrading your binding posts you should address this issue.

The new stuff.

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Close up.

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New plates and posts.

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This is one of the fuse holders. Pretty bad oxidation.

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I forgot to mention......I love the smell of solder at midnight.








Political Correctness'.........defined

"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

President of Club Polk

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Comments

  • vmaxer
    vmaxer Posts: 5,117
    Nice.
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  • littlewoodboats
    littlewoodboats Posts: 823
    Pretty boards. Uncle Jesse once again impresses with clean and professional work.
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  • K_M
    K_M Posts: 1,629
    Great looking work!
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  • heiney9
    heiney9 Posts: 25,194
    Very clean, very nice!
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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  • msg
    msg Posts: 10,120
    Nice, Jesse.
    What kind of wire do you like for the chassis wire upgrades?
    I disabled signatures.
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  • pitdogg2
    pitdogg2 Posts: 25,556
    K_M wrote: »
    Great looking work!

    This guy has no idea what mediocrity is. It all been stellar that I have seen.
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  • gudnoyez
    gudnoyez Posts: 8,124
    I will buy them, what no longer for sale? They look good nice work definitely keepers enjoy the fruits of your labor!
    Home Theater
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  • xschop
    xschop Posts: 5,000
    I agree, well executed F1. I 2nd the question on wires. Also any wall foam or extra dacron that you prefer?
    Don't take experimental gene therapies from known eugenicists.
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  • westmassguy
    westmassguy Posts: 6,850
    Very nice Jesse. I've recommended removing the old fuse blocks for some time. I don't compensate downstream however.
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  • F1nut
    F1nut Posts: 50,647
    Just some nice stranded copper speaker wire, much better than stock, but nothing special.

    I though the about adding some BH5, but there's so much Dacron in there already I decided against it.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • F1nut
    F1nut Posts: 50,647
    Since I lost the model and serial numbers when I replaced the binding post plates I came up with the following. I laminated them before attaching with 3M double sided adhesive sheet material. I think they are happy to have their identity back.

    qwbed61pt2nu.jpg

    cs2hheiw7h20.jpg

    13clghbigciw.jpg







    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • HzTweaker
    HzTweaker Posts: 788
    See! What you've done there is make me want these fab speakers even more. They look great Jesse.
    2ch rig: Speakers: Magnepan LRS w/Magna Riser stands Preamplifier: Parasound P5 Amplifier: Parasound A23 CDP: Pioneer DV-563A Cables: Wireworld Equinox 7 XLR ICs, Wireworld Ultraviolet 7 USB, AudioQuest Q2s, AudioQuest NRG X(preamp)

    Standby: LSi9s with VR3's Fortress mods
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  • Faustin
    Faustin Posts: 1,149
    Very nice work!
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  • tonyp063
    tonyp063 Posts: 1,087
    Nicely done Jesse.
    Clean. Elegant.
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  • machone
    machone Posts: 1,510
    Nice work Jessie :)
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  • VR3
    VR3 Posts: 28,738
    Looking good
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • Ricardo
    Ricardo Posts: 10,636
    Nice I miss mine. Is @cincycat13 still around? Maybe he will sell them back to me....
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  • george daniel
    george daniel Posts: 12,096
    Just reading this thread makes me wanna go dig out mine
    JC approves....he told me so. (F-1 nut)
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  • Kilgore
    Kilgore Posts: 4
    Nice! Very clean.

    I'm thinking about upgrading my Monitor 7C's with new tweeters and a crossover rebuild. They still sound pretty good, but are around 30 years old so I figure it's time.

    Can any of you who have upgraded tell me what improvement I should expect? Compared to some nice systems I've listened to, my modest system has a bit less separation and more sibilance. Some recordings can sound a bit harsh; I think the tweeter replacement should help that by balancing out the treble.

    Thanks.
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  • F1nut
    F1nut Posts: 50,647
    edited March 2017
    What you can expect is an overall improvevent in the sound. A broad stroke, but none the less the truth. Definitely replace those tweeters.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • Conradicles
    Conradicles Posts: 6,092
    Great job...A classic all around nice sounding speaker. I bet the mods paid off. Enjoy.
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