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mixing brands of 900 MHz wireless speakers??

Discussion in 'Electronic Repair' started by meirman, Jun 4, 2004.

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  1. meirman

    meirman Guest

    Can I use one transmitter with two different brands of wireless
    speakers if they are both 900 MHz?

    I bought one pair, and I have one in the bedroom and one in the
    kitchen. Now I'd like another pair, one for the basement, and a spare
    I guess, but they no longer sell RCA. Now they have Jensen and Advent
    brands.

    I would like to use the transmitter I'm using now, or the one that
    comes with the new speakers, for all three or four receiver/speakers.

    Can I do that? Thanks.

    Meirman

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    or not you are posting the same letter.

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  2. jakdedert

    jakdedert Guest

    No telling from here...you'd have to know the *exact frequency* in the 900
    mHz band at which each one operates. They could be the same, or not...or
    they could each be different, but operate at the same frequency as your
    cordless phone.

    If there is no interference on the same frequency--or if they are the same
    frequency, but far enough apart--it should work.

    jak
     
  3. Jerry G.

    Jerry G. Guest

    The different manufactures use different frequency allocations, and their
    own carrier specifications. The term 900 mHz is just an approximation of the
    frequency of the carrier itself. The different manufactures use a particular
    part of the spectrum in their agreed assigned frequency allocation for their
    product type. Many also use their own carrier encoding specification as
    well.

    --

    Jerry G.
    =====


    Can I use one transmitter with two different brands of wireless
    speakers if they are both 900 MHz?

    I bought one pair, and I have one in the bedroom and one in the
    kitchen. Now I'd like another pair, one for the basement, and a spare
    I guess, but they no longer sell RCA. Now they have Jensen and Advent
    brands.

    I would like to use the transmitter I'm using now, or the one that
    comes with the new speakers, for all three or four receiver/speakers.

    Can I do that? Thanks.

    Meirman

    If emailing, please let me know whether
    or not you are posting the same letter.

    Change domain to erols.com, if necessary.
     
  4. meirman

    meirman Guest

    In sci.electronics.repair on Fri, 4 Jun 2004 17:21:23 -0500
    Only the more expensive of the two brands they are selling now gives
    something about that. "Variable Frequency Adjustment between 912.5 to
    914.5 MHz" But this just refers to the speakers, and I guess the
    other speakers, even though they also have tuning, could be in an
    entirely different band, even if a naarby band.

    You allowed for that, right?
    No problem. I have a phone like that that I got second-hand but I
    never use it and it isn't even plugged in now.
    I could plug in both transmitters, but that seems wierd.


    BTW I appreciate very much your having answered before I have to go to
    the sale tomorrow.

    For background fwiw, I was going to hard wire the whole thing, using
    the unused pair of my 4 wire phone lines. But I was at a sale by
    closeoutguys.com. They only show in person in the northeast I think,
    DC, Md., Pa. N.J. maybe more.

    And they had refurbished speakers, originally 60 the original sticker
    said. Now 20. (although checking the web, they are mostly 80 dollars
    or more. Only one site has 70 plus shipping.) So cheap, and easier
    than wires. The first pair worked so I went back and bought a second
    pair. By the second day, one of the first pair didn't work well
    enough, and one of the second pair didn't work. That's what you get
    sometimes when you look for a bargain. So I have one good pair now,
    and tomorrow is the first time they are back in Baltimore. I'm sure
    they will give me my money back, and if I'm lucky, they still have
    some of the same brand, but the other two brands are all they point me
    to on Ebay. (The refurbishe ones sold List for 130 and the bid is
    around 33 now.)

    Just looking for the same speaker on ebay, regardless of who is
    selling it, they have one pair, buy it now for 48 dollars including
    shipping.

    These are not expensive speakers, but I listen mostly to talk-radio
    and they are fine.


    I hunted on the web and one of the two they advertise now has two
    frequencies so one can use two transmitters, I guess with different
    sounds on each of them. Cool. But that means one band at least is
    not mine, and if one, maybe both.



    Meirman

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    or not you are posting the same letter.

    Change domain to erols.com, if necessary.
     
  5. meirman

    meirman Guest

    In sci.electronics.repair on Fri, 4 Jun 2004 20:20:49 -0400 "Jerry G."
    I wondered about this last item too.


    Thanks a lot. They actually have only one item on their website at
    any one time, and they had only two items on ebay (both of them
    wireless speakers, which has to be a coincidence.)

    But they sell other things and if I'm lucky, they'll still be selling
    one good box of what I bought, about 2 months ago. If not, I'll
    assume the others won't work on the same transmitter.

    I should have bought 4 pairs the first time, with an agreement I could
    return two pair the following day. ;) We'll see if they'll do
    something like that this time. Live and learn.

    Thanks to both of you.

    Meirman

    If emailing, please let me know whether
    or not you are posting the same letter.

    Change domain to erols.com, if necessary.
     
  6. gothika

    gothika Guest

    If your speakers have the fine tune adjustment it is possible to use
    similar brands as long as are in the 900 mghz range and can tune to
    match.
    The Advents are actually Recotons. I have the Recotons 900mghz
    speakers and the the Advent transmitter unit and they tune up just
    fine.
    The thing is to go th the manufacturers website and check out the
    specs to find out the tuning bandwidth of the particular brand you're
    thinking about buying.
    All the Advents match the specs of the earlier Recotons.(If you try
    Recoton they redirect you to Advent, sure sign that advent bought them
    out.)
    Seems I've used some of the earlier RCA wireless speakers with my
    Advent transmitter as well though I can't remember the particular
    model #'s.
     
  7. meirman

    meirman Guest

    In sci.electronics.repair on Fri, 04 Jun 2004 22:39:42 -0500 gothika

    I was going to post tonight regardless, but my post turns out to be
    quite related to your post. In fact, I wish I'd read your post last
    night, even though I guess the result would have been the same.
    The manager today told me the same thing! He also said, iiuc, that
    Recoton had been bought by RCA. And that he used different brands at
    his house, and they worked together well. He seemed to say that all
    of the speakers sold used the same band exactly, but I sort of think
    he means all the brands his outfit has sold. And I think, or they
    give the impression by their name, closeoutguys.com, that they sell
    mostly odd lots and repaired products, etc.
    I could find the Advent speakers but I couldn't find the RCA's that I
    already owned. But eventually I found some site that claimed to give
    the frequency for the RCA's although I don't know how they would know
    when no one else did, and it's not in the owners manual. But the site
    said 911.5 to 913.5, and the Advent sites reliably said 912.5 to
    914.5.

    The webpage also claimed to know the frequency response, even though
    that wasn't mentioned on the box or in the instruction manual.

    Anyhow, when I got there today, before I talked to the manager, the
    salesman in charge had Advent speakers playing, and he just plugged in
    mine and they worked fine with the Advent transmitter! I said to him
    maybe because the speaker is only three feet from the transmitter, so
    he found some batteries and we walked about 40 or 50 feet away and
    they still worked fine. Almost the first thing he had done was say
    they had no more RCA speakers, but he could give me a transmitter.
    And he repeated his offer to give me, free, an Advent transmitter.

    Tonight I tested the bad speakers again at home and they were still
    bad, in the bathroom, which is only 15 feet from the transmitter. So
    I changed the transmitter to the Advent and now they work! The Advent
    AC adaptor is only 100milliamps, and the RCA one was 200 milliamps.
    They both have a frequency adjuster, and the Advent has an output
    Level control, although maybe the maximum is no more than the fixed
    RCA value. Still, now all 4 speakers work with the Advent
    transmitter, and one can't argue with that. (I haven't put any of
    them in the basement yet.)
    Good to know. FTR, these are RCA WSP150's and the Advent transmitter
    is from an AW400. (I thought of upgrading one of my pairs to these,
    but they only have controls on one of the pair, and the second is
    connected by a wire. I'm just using one speaker in each room, and I
    can do that because the RCA's have the same controls on each speaker.


    I still haven't tried the RCA transmitter that came with the second
    set of RCA speakers. Maybe I should have, maybe it's better, but
    since two speakers worked so well, I didn't think there was anything
    wrong with the first transmitter. But I think he said he had extra
    transmitters and he offerred me one right away.

    I need a second one for the bedroom, because I have a regular radio in
    there that gets 2 almost local stations that the other radios don't
    get. (The first transmitter is connected to the computer for
    webradio).

    For testing I tried them with a music CD tonight and they really
    didn't sound very good at times, and I have low standards. They list
    between 80 and 100 dollars, and are still for sale. Home Depot of all
    places has them on their website for 70 with free shipping for
    anything over 50 dollars until father's day. The price stickers on the
    ones I bought were 60 dollars, but maybe the stickers are from last
    year or the year before? But maybe one has to spend more than 80 new
    for good wireless music sound. But for music, I can use the radio. I
    need these for talk-radio.

    Thanks again to all of you.



    Meirman

    If emailing, please let me know whether
    or not you are posting the same letter.

    Change domain to erols.com, if necessary.
     
  8. meirman

    meirman Guest

    In sci.electronics.repair on Fri, 04 Jun 2004 22:39:42 -0500 gothika
    My first reply was too long. The upshot was they gave me an Advent
    transmitter which worked with all 4 of my RCA wireless speakers. They
    seemed to have extra transmitters, or they already knew that some
    people had trouble with the RCA transmitter.

    I haven't tried them in the basement yet, but I'm sure two of them
    will work fine there, which is more than enough.

    Thanks again.

    Meirman

    If emailing, please let me know whether
    or not you are posting the same letter.

    Change domain to erols.com, if necessary.
     
  9. gothika

    gothika Guest

    I believe the RCA's are actually made by Recoton/Advent.
    I have some RCA speakers that work with my Advent transmitters just
    fine and look identical to my Recoton speakers.
     
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