How do I bridge my TS112A speakers?

My TS112A's have two inputs, AND TWO GAIN KNOBS on the back, but no bridging switch. I don't get it - one line/mic gain knob for each of the inputs. From my mixer's left and right stereo outputs, I hooked up to each of the inputs on ONE box, just to try to work out why the two inputs required TWO separate gain knobs, rather than just one master volume for the whole box. I found that there are indeed two different (identical, I think?) amps in the box, each controlled by these two gain/vol knobs. If I don't use BOTH amps, I'm missing out on HALF the box's amp capacity, which would be nuts. I know it's there to be a 2-input mixer, but with independent amps attached? So my question is: do I have to build some sort of splitter xlr mic cable to go into the back of this box, in order to get the benefit of both amps in one box for the one left (or right) signal from my desk? Because if so, it means I have to build ANOTHER splitter xlr mic cable for the other TS112A box, as I'm taking two xlr cables out of my box to run one into each of these TS112a boxes. I've never seen this before, and clearly, the splitter lead isn't what's meant to happen with pro users, so without a bridging switch to bridge both amps into one big one, I don't get it. I'm confused! Thanks, Stu.
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  • Hello Stu,

    Thanks for the post. I'd like to help! To answer your question, the MIX OUT feature is what you would use to connect another speaker to your current one. They will output the same. Whatever music you're inputting to one TS112A, when connected via MIX OUT, that will play out to the other speaker. Try using that feature to see if that helps your problem
    • What the heck?!? Someone's changed the title I gave this question, to something entirely unrelated to what I asked..! I never once mentioned I wanted to connect a second speaker to the first?

      Chris - could you pls read 'in entirety' what I asked? Could you please try responding again with a related answer? I didn't ask anything about Mix Out options - the last thing I want to do is to link two speakers together.

      ONE box - with TWO amps inside - BRIDGE mode..?
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  • Hey Chris. Thanks for the reply, but maybe I've confused the topic with my long-winded description.. I'm not enquiring about the mix out function. What I want to know is;

    if I only put ONE lead (my stereo-LEFT XLR from my desk) into ONE TS112A box (into the Input 1 port obviously), then plug the stereo-RIGHT XLR cable from my desk into the OTHER TS112A (into it's Input 1), of course I'll have both boxes taking the stereo feed from my desk (one left - one right) - which is great. BUT - each box will only be using ONE amp - NOT both of the amps. Clearly, you want to utilise the MAXIMUM power output for each box - all power available, even just for great headroom. So other than making up a splitter lead for each box (an XLR "Y" cable), how else do I run the boxes so I utilize BOTH amps in BOTH boxes for the one signal I give each box? Other brands often include a bridge switch, so the box's two amps double up as one to run the box fully. I don't understand what to do to run the box's TWO amps at once? Does this clarify?
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  • Hello Stu,

    Sorry for any confusion. Here's what you said "My TS112A's have two inputs, AND TWO GAIN KNOBS on the back, but no bridging switch. I don't get it".

    Well, there are no bridging capabilities with this speaker so that's the reason why I was talking about the MIX OUT feature as an option for you. It sounds like for your particular setup, these speakers may not be the best choice for you. Also, it's hard to read and understand what you're trying to do. Could you try re-writing your issue a little clearer maybe adding some bullet points and what not so that I can correctly distinguish what your trying to do and help you out? That will help or, you can always call into technical support and get an agent over the phone to help you. Log onto www.altoproaudio.com/support to contact Alto Pro Technical Support.
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  • Hi Chris. Thanks for your reply. I can't imagine how I can make it clearer. I'll try again, with a somewhat more simplified scenario..;

    I take ONE MONO XLR send out from my desk. I have ONE TS112A box to plug it into. How do I utilise BOTH amps in this TS112A box, so I utilise ALL the box's power (BOTH poweramps at once), and not leave one amp (literally half of the box's power) totally unused?
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    • "AMP" = the amplifier INSIDE the TS112A itself. There are TWO "amplifiers" inside the TS112A. I want both powering the unit, and I have just the ONE xlr lead I plug into the TS112A from my desk.
    • Essentially Chris, if I were running one of my usual live gig PA's that use two PASSIVE speakers (ie speakers with NO onboard amplifiers, that therefore had to be powered by an external poweramp), I'd use my TWO external stereo poweramps. I switch EACH stereo amp to BRIDGE mode (there's a switch on the back of most stage stereo amps - so the user can switch between stereo/parallel/bridge), and when you use bridge, it runs the two sides/channels of the amp as one big mono amp, so doubles the output. So you run both individual amps this way - bridging both, and powering EACH speaker with its own monstrous, bridged poweramp. Lots of headroom that way, without approaching clipping. That's all my query was. Your TS112A boxes (for the financial outlay) are really quite spectacular. But not including a bridging button for the two amplifiers seems an amazing oversight. The box becomes twice as powerful without harming components (if you don't push too hard on the volume knobs of course), which to most gigging musos is a real gamechanger. Anyhoo, I'm probably making no sense, but as it goes, I've already made up two Y cables to run it the way I want, and mate.. my God, it's monsterous now! ;-) My splitter Y cable photos are below.. Sorry if I wasn't able to clarify well enough..
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  • So Chris... is this home-made splitter cable the only way I can run both the amps inside the TS112A at once, from just the one signal?
    • Chris? Are you there?
    • Hello,

      Sorry, we are not open during the weekend for support. It sounded like you answered your own question from your comment 4 days ago. Never a less, based on your setup, I think cable could do the trick. You have a interesting setup that is not a normal or basic setup with these speakers so just be careful how much your powering your speakers. You seem very knowledgeable in clipping and headroom adjustment so just keep an eye on the clipping for each speaker. Enjoy your speakers!
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  • Thanks Chris. Can I ask also;

    IF I run one TS112A cab each side for my solo gig, it's all good, but when I run my 6-piece band, I'd like to put a powered 15" sub underneath to go with the two TS112A's.. Maybe the Alto TSSub15? How would I patch that system together - would the powered sub be sending a "powered" signal to both the TS112A cabs? If so, shouldn't they be passive, rather than active cabinets?
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    • Hey JT. Yeah I did it.. was terrible unfortunately. They aren't set up to work that way I'm afraid.. two independent signals both pumping the 12 at once. It was ghastly. I went back to my Nexo PS8 rig, which is a monster rig compared to these. If they'd built a bridge switch into the cab, it might have been interesting, but I would have blown them up way faster then anyway..!? YMMV but at the end of the day it's just a budget box I guess. Good luck. Stu.
    • Thank you so much for the feedback,, sorry about your rig,, but glad you had a reliable back up..thanks again!
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