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#1
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stereo audio switch 1 in 8 out
Hello,
Can anyone tell me a brand and model of stereo audio swithc 1 INPUT and 8 OUTPUT for a stereo hi-fi signal, anyone knows if sold on the web ? OUTPUT should be possible to select them independently or all together thanks Mario |
#2
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stereo audio switch 1 in 8 out
Mario wrote:
Hello, Can anyone tell me a brand and model of stereo audio swithc 1 INPUT and 8 OUTPUT for a stereo hi-fi signal, anyone knows if sold on the web ? OUTPUT should be possible to select them independently or all together When shopping at a food store, do you OUTPUT to get in the store, and INPUT to get out? -- Adrian C |
#3
Posted to rec.audio.pro,alt.home-theater.misc,aus.audio-visual.home-cinema,uk.media.home-cinema,uk.rec.audio
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stereo audio switch 1 in 8 out
"Mario" wrote ...
Can anyone tell me a brand and model of stereo audio swithc 1 INPUT and 8 OUTPUT for a stereo hi-fi signal, anyone knows if sold on the web ? OUTPUT should be possible to select them independently or all together Sure. Go to a place like www.markertek.com and search for "matrix router". Dunno whether the prices for those commercial units meets your (undisclosed) requirements? |
#4
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stereo audio switch 1 in 8 out
Mario wrote:
Can anyone tell me a brand and model of stereo audio swithc 1 INPUT and 8 OUTPUT for a stereo hi-fi signal, anyone knows if sold on the web ? Stereo hi-fi signal? Would that be a line level balanced signal, unbalanced signal? Speaker level? +4, -10, +8? OUTPUT should be possible to select them independently or all together Select what? There is only one input. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#5
Posted to rec.audio.pro,alt.home-theater.misc,aus.audio-visual.home-cinema,uk.media.home-cinema,uk.rec.audio
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stereo audio switch 1 in 8 out
On 16 Dic, 01:36, (Scott Dorsey) wrote:
Mario wrote: Can anyone tell me a brand and model of stereo audio swithc 1 INPUT and 8 OUTPUT for a stereo hi-fi signal, anyone knows if sold on the web ? Stereo hi-fi signal? *Would that be a line level balanced signal, unbalanced signal? *Speaker level? *+4, -10, +8? * OUTPUT should be possible to select them independently *or all together Select what? *There is only one input. * --scott -- "C'est un Nagra. *C'est suisse, et tres, tres precis." I think I need what is called 8 way speaker switch I need to connect a stereo source to 8 pairs of speakers selectable |
#6
Posted to rec.audio.pro,alt.home-theater.misc,aus.audio-visual.home-cinema,uk.media.home-cinema,uk.rec.audio
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stereo audio switch 1 in 8 out
On Tue, 16 Dec 2008 01:49:02 -0800 (PST), Mario
wrote: I think I need what is called 8 way speaker switch I need to connect a stereo source to 8 pairs of speakers selectable So you can't use a hi-fi amplifier and 8 ohm speakers - the load will vary too much between having one pair of speakers and eight. You'll need a 70v line system. Read about them he http://www.epanorama.net/documents/audio/70volt.html The place that sells you a 70v output amplifier and the speakers will also have switching boxes. |
#7
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stereo audio switch 1 in 8 out
Mario wrote:
I think I need what is called 8 way speaker switch I need to connect a stereo source to 8 pairs of speakers selectable You can buy a device like this from a company like Niles. However, you will find out that you don't have independant level control, so unless all the speaker pairs are the same the level will change as you go from one to the next. You will also find that the Niles devices present a different source impedance to the speaker depending on how many you have selected. This will change the low end response somewhat. But the Niles boxes have series resistances in them that get switched in and out of circuit to make sure your amplifier never has too low a load impedance on it. It's not very elegant but it works okay at reasonable power levels. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#8
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stereo audio switch 1 in 8 out
Mario wrote:
I think I need what is called 8 way speaker switch I need to connect a stereo source to 8 pairs of speakers selectable That's exactly what you need. It's not as simple as you might imagine though. One input to one of eight outputs is easy, but if you want to send it to two outputs, or three, or five, or eight, you run into problems with the load impedance on the amplifier driving the system (as well as the amount of power you need). The way that this problem is resolved is by effectively converting the speakers, with buiilt-in transformers, to a constant voltage system. Such a switchbox has more parts in it than a multi-position switch, and is priced accordingly. Here's a link to a six-way speaker switch: http://www.nilesaudio.com/product_se....php?catcdID=7 -- If you e-mail me and it bounces, use your secret decoder ring and reach me he double-m-eleven-double-zero at yahoo -- I'm really Mike Rivers ) |
#9
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stereo audio switch 1 in 8 out
I think I need what is called 8 way speaker switch.
I need to connect a stereo source to 8 pairs of speakers selectable. There's a way to build one yourself, that's not horribly difficult. Let's assme the eight speakers are identical, and 8 ohms (say). Wire up two series-parallel matrices of nine DPDT switches, using the "center" connectors of the switches. Put an 8-ohm resistor across one side of each switch, and speaker terminals across the other. The matrix will have the same resistance and present the same net load, whether a given speaker is switched in or out. Yes, there will be slight differences in level and FR, even if the speakers are identical. But this is the simplest way to do it. |
#10
Posted to rec.audio.pro,alt.home-theater.misc,aus.audio-visual.home-cinema,uk.media.home-cinema,uk.rec.audio
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stereo audio switch 1 in 8 out
"Mario" wrote ...
I think I need what is called 8 way speaker switch I need to connect a stereo source to 8 pairs of speakers selectable What does "source" mean? Exactly? What does "speakers" mean? Exactly? This is not the kind of thing you can ask as a theoretical question and expect practical recommendations. |
#11
Posted to rec.audio.pro,alt.home-theater.misc,aus.audio-visual.home-cinema,uk.media.home-cinema,uk.rec.audio
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stereo audio switch 1 in 8 out
On Dec 16, 7:45*am, (Scott Dorsey) wrote:
Mario wrote: I think I need what is called 8 way speaker switch I need to connect a stereo source to 8 pairs of speakers selectable You can buy a device like this from a company like Niles. *However, you will find out that you don't have independant level control, so unless all the speaker pairs are the same the level will change as you go from one to the next. You will also find that the Niles devices present a different source impedance to the speaker depending on how many you have selected. *This will change the low end response somewhat. But the Niles boxes have series resistances in them that get switched in and out of circuit to make sure your amplifier never has too low a load impedance on it. *It's not very elegant but it works okay at reasonable power levels. --scott -- "C'est un Nagra. *C'est suisse, et tres, tres precis." I bought a similar product by Adcom about 12 years ago. Like the Niles, not the most elegant solution, but it is simple and it works. Dan (Woj...) |
#12
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stereo audio switch 1 in 8 out
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#13
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stereo audio switch 1 in 8 out
Doesn't powering multiple speakers simultaneously from one amp increase the
load significantly (more than arithmetically)? |
#14
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stereo audio switch 1 in 8 out
Doesn't powering multiple speakers simultaneously from one
amp increase the load significantly (more than arithmetically)? It depends on the speakers' impedances, and how the speakers are wired. The net load impedance can be greater, the same, or less. |
#15
Posted to rec.audio.pro,alt.home-theater.misc,aus.audio-visual.home-cinema,uk.media.home-cinema,uk.rec.audio
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stereo audio switch 1 in 8 out
"William Sommerwerck" wrote in message ... Doesn't powering multiple speakers simultaneously from one amp increase the load significantly (more than arithmetically)? It depends on the speakers' impedances, and how the speakers are wired. The net load impedance can be greater, the same, or less. And it may well vary from frequency to frequency....less at some frequencies and more at others, depending on the vagaries of the two speakers' impedances. |
#16
Posted to rec.audio.pro,alt.home-theater.misc,aus.audio-visual.home-cinema,uk.media.home-cinema,uk.rec.audio
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stereo audio switch 1 in 8 out
Claude wrote:
Doesn't powering multiple speakers simultaneously from one amp increase the load significantly (more than arithmetically)? It increases it arithmetically. This is why the speaker switchboxes have some big series resistors that they swap in and out to make sure the amp sees an appropriate load. When you parallel impedances, you add reciprocals. So two eight ohm speakers in parallel gives you 1/8+1/8=1/4 for a total of four ohms. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#17
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stereo audio switch 1 in 8 out
Claude wrote:
Doesn't powering multiple speakers simultaneously from one amp increase the load significantly (more than arithmetically)? If you want them to be all about the same volume, sure it does. But then amplifier POWER is rarely an issue these days. They make some mighty big amplifiers. What's the issue is the maximum amount of current or voltage that an amplifier can pump into a given load. Ohm's Law is still The Law. -- If you e-mail me and it bounces, use your secret decoder ring and reach me he double-m-eleven-double-zero at yahoo -- I'm really Mike Rivers ) |
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