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Author Topic: Is this real?  (Read 1830 times)

Mac Kerr

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Re: Is this real?
« Reply #10 on: February 03, 2019, 07:50:42 pm »

I'm still not sure if you're talking about wireless microphones or IEMs...

THIS^^^^^
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Erik Jerde

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Re: Is this real?
« Reply #11 on: February 04, 2019, 12:35:43 am »

I think we might have a terminology issue here. A "combiner" is something that takes several RF signals and combines them into a single signal path. A splitter (or distro) is something that takes a single RF signal path and splits it into several identical copies. Combiners are used with IEM transmitters, taking several separate IEM signals and combining them into a single transmission line. Splitters are used with wireless microphone receivers, taking a single (typically pair of) antenna feeds and splitting them out to multiple receivers.

The ASA 1 is an 4-way antenna splitter, splitting one pair of antenna feeds to four separate wireless microphone receivers. A pair of ASA 1s can be cascaded into each other to create an 8-way splitter, which is the typical setup for 8-channel Sennheiser racks.

For IEMs, the Sennheiser 4-channel combiner is the AC 3. Sennheiser does make an 8-channel combiner, the AC 3200-II, but it is a lot of money. In theory you can passively combine the output of two 4-channel combiners, but you'll suffer ~4dB of loss for doing so (i.e. more than half your transmit power).

I'm still not sure if you're talking about wireless microphones or IEMs...

-Russ

Iíve combined to AC3 through a shure passive combiner and had zero problems.  Shure even used to have a paper on this but I canít find it anymore.
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Lyle Williams

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Re: Is this real?
« Reply #12 on: February 04, 2019, 03:25:58 am »

Sure does.

Avoid.


Cheers,
Tim

If you are looking for a place to go cheap, far better to go cheap here than on the mics.
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Scott Helmke

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Re: Is this real?
« Reply #13 on: February 04, 2019, 11:35:41 am »

An amplified splitter is likely to be the second least sophisticated piece of electronic equipment you will own (after a transformer-based wall-wart)

The old Sennheiser ASA (2-space unit sold maybe 15-20 years ago?) was basically a rack enclosure with off-the-shelf TV amp and splitters inside.
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Dave Garoutte

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Re: Is this real?
« Reply #14 on: February 04, 2019, 12:37:12 pm »

I think we might have a terminology issue here. A "combiner" is something that takes several RF signals and combines them into a single signal path. A splitter (or distro) is something that takes a single RF signal path and splits it into several identical copies. Combiners are used with IEM transmitters, taking several separate IEM signals and combining them into a single transmission line. Splitters are used with wireless microphone receivers, taking a single (typically pair of) antenna feeds and splitting them out to multiple receivers.

The ASA 1 is an 4-way antenna splitter, splitting one pair of antenna feeds to four separate wireless microphone receivers. A pair of ASA 1s can be cascaded into each other to create an 8-way splitter, which is the typical setup for 8-channel Sennheiser racks.

For IEMs, the Sennheiser 4-channel combiner is the AC 3. Sennheiser does make an 8-channel combiner, the AC 3200-II, but it is a lot of money. In theory you can passively combine the output of two 4-channel combiners, but you'll suffer ~4dB of loss for doing so (i.e. more than half your transmit power).

I'm still not sure if you're talking about wireless microphones or IEMs...

-Russ

Well, D'oh! again.
I was visualizing the wrong direction.
Splitter it is.
I had also forgotten about daisy chaining two ASA1s together.
I saw it when I assembled the racks, but promptly forgot about it as it wasn't necessary for me at the time.

Thanks Russ!
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Henry Cohen

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Re: Is this real?
« Reply #15 on: February 04, 2019, 09:17:13 pm »

If you are looking for a place to go cheap, far better to go cheap here than on the mics.

I doubt the talent that has to listen to the IEMs would agree . . .
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Henry Cohen

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Jason Glass

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Re: Is this real?
« Reply #16 on: February 05, 2019, 01:36:56 am »

The old Sennheiser ASA (2-space unit sold maybe 15-20 years ago?) was basically a rack enclosure with off-the-shelf TV amp and splitters inside.
Please cite your sources on this before I vigorously refute your statement.  I don't want to unnecessarily raise an argument.

It was a POS by today's standards but those Germans sure as hell designed it for its purpose, as a through and through 50 Ohm system.

Sent from my mobile phone using Tapatalk
« Last Edit: February 05, 2019, 01:40:56 am by Jason Glass »
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Scott Helmke

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Re: Is this real?
« Reply #17 on: February 05, 2019, 11:04:05 am »

Please cite your sources on this before I vigorously refute your statement.  I don't want to unnecessarily raise an argument.

It was a POS by today's standards but those Germans sure as hell designed it for its purpose, as a through and through 50 Ohm system.

My source was  that I opened the box to fix something, and found it full of off-the-shelf components. Likely they were high quality components, but they were in fact little boxes cabled together with coax inside the Sennheiser box.
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Jason Glass

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Re: Is this real?
« Reply #18 on: February 05, 2019, 11:07:01 am »

My source was  that I opened the box to fix something, and found it full of off-the-shelf components. Likely they were high quality components, but they were in fact little boxes cabled together with coax inside the Sennheiser box.
Roger that.  Can't fault a personal inspection!

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Scott Helmke

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Re: Is this real?
« Reply #19 on: February 05, 2019, 12:56:36 pm »

Roger that.  Can't fault a personal inspection!

It's not like distributing wideband antenna signals is anything new.  The cable TV industry has been doing it for half a century already.
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