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mixing brands of 900 MHz wireless speakers??

M

meirman

Jan 1, 1970
0
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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J

jakdedert

Jan 1, 1970
0
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
 
J

Jerry G.

Jan 1, 1970
0
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.
 
M

meirman

Jan 1, 1970
0
In sci.electronics.repair on Fri, 4 Jun 2004 17:21:23 -0500
jakdedert said:
No telling from here...you'd have to know the *exact frequency* in the 900
mHz band at which each one operates.

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?
they could be the same, or not...or
they could each be different, but operate at the same frequency as your
cordless phone.

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

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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M

meirman

Jan 1, 1970
0
In sci.electronics.repair on Fri, 4 Jun 2004 20:20:49 -0400 "Jerry G."
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.

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

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G

gothika

Jan 1, 1970
0
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.

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.
 
M

meirman

Jan 1, 1970
0
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.
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 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.
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.

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.)
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.

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

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M

meirman

Jan 1, 1970
0
In sci.electronics.repair on Fri, 04 Jun 2004 22:39:42 -0500 gothika
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.

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

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G

gothika

Jan 1, 1970
0
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

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or not you are posting the same letter.

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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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