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Thread: Rockville propietary monitor cable: fix, replace, throw in Mississipi River?

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    Rockville propietary monitor cable: fix, replace, throw in Mississipi River?

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    I got a free set of rockville apm5 monitors a while back from a friend, and what can i say, they've done their job. A few weeks ago i started to periodically lose signal in the right speaker, and turns out the cable connecting them is fritzed. before i got out the soddering iron, i figured i'd look around for replacements. Emailing rockville got me a rude and poorly spelled response about two weeks later. So i'm gonna go with trying to fix it. But failing that, and given that i can't afford a new pair of monitors at the moment, can anyone ID this propietary 4-pin cable for me, in case i need to replace it? google hasn't turned up much. also:

    since i'm stuck w them for now, i kinda don't even wanna know, but what's the general reputation of these monitors?

    New to this forum, excited to get these fixed and back to learning the dark arts of home recording here :PIMG_0227.JPGIMG_0228.JPG

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    Perhaps your money is better spent on a good soldering supplies and some rudimentary diagnostic tools like a volt meter.
    You're gonna need stuff like that anyway just to maintain the many connections your studio will someday have.

    Most probably, you could take the connectors apart; use a voltmeter (or just your eyes) to see what's connected to what; and repair. If it's definitely the cables, then you might have to snip off a few inches if there's a break.

    OR build new cables. No problem.

    OR replace with standard connectors on both cables and amp. Still no problem.

    No need tossing anything. This is pretty simple stuff of the kind that most home-studio types have cut their teeth on somewhere along the way.

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    Hey thanks for the encouragement! I must have needed it, because that's pretty clearly the practical solution.

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    The screw lock connectors are dirt cheap, and I suspect got chosen because they lock, and n' be mixed up with the other connector types. Inside will be ordinary twin core cable. As Ponder5 says, just open them up. Two small buckets to solder. Most faults will be caused by flexing? Have you been wiggling them? It's not a complicated soldering job, and if you really can't or don't want to learn - ask your facebook friends - one is bound to be able to solder! Most shops that sell CB/business radios will have these connectors in stock - and the cable is nothing special at all - doesn't even need to be round! Chances are that it's just a dry joint. A dab with the iron and a. bit of new solder will fix it.

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    If the connector itself is bad (unlikely) you can buy replacements. They were used on mobile radio microphones. Not sure if these are the same size but they are available.
    https://www.americanradiosupply.com/...BoCz4YQAvD_BwE

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    Yep - that's them. A worldwide connector - Japanese in origin I think - 2 through to 7 or 8 pins, I believe.

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    That's a common Amphenol connector best known for being used on microphones in the 60s. You can still get them.

    Most likely you can resolder your cable.
    Last edited by bouldersoundguy; 03-25-2019 at 23:16.

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    The connectors will probably be fine, solder new cable to the old connectors. I do have Old mics in my collection that use that type of connector.

    Alan.

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    There was indeed a loose wire, which i soldered and got signal back into the right speaker.

    But then a new thing - a whole lot of distortion on the bass, little machine farts with every beat, and definitely coming from the speaker. With two days left to deliver the guitar tracks i promised my band, i've been making a lot of hasty decisions, and I concluded it was probably caused by the large dent in the front of the cone. Best idea i could think of was to carefully insert a tiny, angled wire thru the front of the cone to pull it back into sh... and tear a massive hole in it. So yeah.

    now i guess i just do my best to track the DI guitar - monitoring not toooo important there i imagine, and then until the final reamping happens (in the room everyone else played), see how it mixes in for now w amp sim and reverb etc, monitoring w my pretty terrible headphones but also with a bass practice amp (1x12, crate) set up on the right side, EQd to kinda sorta match the remaining monitor.

    do monitors like these, where the pair of RCAs go into one and then a cable goes to the other have crossover built into them?
    now that i'm sending one rca into the remaining monitor, and the other thru a RCAstereo-to-1/4mono splitter (er, uniter) and into the bass amp, am i gonna get a different stereo image - without a center? does that matter?

    this is crazy town, i know. pretty fun tho...

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    Normally, they do have a crossover in the passive unit, and use two core cable, but when you repaired the connector, the clue is in the cores - were all four used? If so the crossover is in the main unit, if only two, it's in the passive one.

    If you have destroyed the main driver, then any attempt to use different speakers to restore two, is going to really mess things up. What I'd do, is to use headphones for checking stereo, and then mix on one speaker in mono. This isn't as bad as you think, because mono really focuses your brain. With two speakers, in stereo your mixes sound really good, and deep. Try to mix in mono and getting the balance right can be really much harder - but when you do, it sounds even better in stereo. We do a fair bit of clip track work - we record perfectly normally, and do rough mixes, but then click goes to left, usually with count-ins and title, and all the backing track goes right. We usually do a stereo rough mix with every instrument - like a normal recording, then we drop out all the instruments that will be played leaving the 'extras' and getting this thinned out mix right, in mono - is damned hard. EQ becomes more important. I guess stereo just is easy on the ears.

    I'd not suggest even thinking that a bodged together system will work well when played back in stereo on a decent system. You just won't be happy. Maybe even though I don't like headphone mixes, this could be the safest solution?

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