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Control 2 Spider Iv Amps With One Fbv Shortboard


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#21 TheRealZap

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Posted 02 October 2013 - 12:41 PM

I do not.

 

Do you know which pair powers the FBV?


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#22 broadwood

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Posted 04 November 2013 - 01:58 AM

Hi Guys

 

I'd like to jump on board here as this is something i would like to also do. Just wondering, has anyone actually approached line 6 tech support about this and if so what did they have to say about it?

 

I have a background in electronics and before i even had a look on the web i realised there would be problems using network switches etc because of the power required for the fbv. I also found on the web that someone had tried using one and fried their PCB !!!.

 

I haven't tried anything as yet as i want to gather as much info as possible before even attempting. But, to my mind, it should just be a case of isolating the power wires and bussing the receive wires together ( the transmit from the slave amp shouldn't be required). however, what I'm not sure of is if there is any handshake protocol between the amps and FBV's, if so we may all be barking up the wrong tree here. It may be as simple as just bussing the receive (or rather transmit from FBV) wires so it feeds the second amp simultaneously but have all other connections to the slave broken. In this way, i'm guessing that you would connect and power up the first amp to fbv so all power and handshake requirements are met, then connect our fbv transmit buss to an already powered up slave amp. With no other connections made it should respond to commands (unless it requires a completed handshake before it will receive). If it does need to handshake then we will need to find a way to fool it which may be difficult.


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#23 jschires

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Posted 04 November 2013 - 06:40 AM

Your Theory sounds correct to me. I have tried to make this work but so far have been unsuccessful. Thankfully I have not fried anything, but it still only controls the one (master) amp in my case. Would really love to get this working if anyone has any other ideas.


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#24 broadwood

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Posted 04 November 2013 - 08:26 AM

Just read through this thread again. I think your on the right lines js, but i think it needs more than one wire connected. using a meter on your splitter may help isolate the power wires, i doubt if it would be ac and i would expect it to be no more than 5 volts dc. It could be rs232 connection or more likely rs485 which i'm not totally familiar with. RS 232 is a serial connection and needs two wires to transmit/recieve. You need both I believe due to handshaking. The more i think about it the more i think there is handshaking involved (so both units know the state of the other). Ive requested a service manual from support which they refused, (i'm not surprised) but I've requested specific information on the connection. I don't see why they won't give it but if they don't then this may not be an option for us. I'll keep you posted...


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#25 jschires

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Posted 04 November 2013 - 09:27 AM

Looking forward to your updates. Im not very familiar with wiring electronics, so hopefully you will find a solution to this. Its nice to see another person interested in making this work!


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#26 broadwood

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Posted 06 November 2013 - 01:15 AM

Hmm! Line 6 support doesn't seem to be very helpful. They don't want to impart any information but encourage me to use the forum to see if anyone else can help. This just encourages people to trial and error without the proper information which could result in damage or injury. Pretty much any other manufacturer would supply information. It's not like a major product secret surely? It's simply a data connection!

 

That is such a shame,


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#27 jschires

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Posted 14 November 2013 - 06:59 AM

I agree completely! I love the sound of my amp but seriously considering purchasing something else. I wanted to control 2 amps with one pedal so that I can run one left stage and one right stage. Without this option (which seems like it shouldnt be that difficult of an answer from them), purchasing a different setup may be my only choice. I can mic one and run it to the other amp, but I wanted to run slightly different tones/effects on each amp. Would be awesome if you find a way to get the handshake you mentioned above to work!


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#28 TheRealZap

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Posted 14 November 2013 - 07:13 AM

it's not a supported feature... pretty straightforward.

if you're trying to do something outside of the original design you're on your own...

sorry, but i think your expectations that line6 will help you re-engineer their product for your specific needs is the fault here....

not saying you can't or shouldn't try what you're suggesting...

just saying... putting it on line6 in this instance is a stretch.

 

Hmm! Line 6 support doesn't seem to be very helpful. They don't want to impart any information but encourage me to use the forum to see if anyone else can help. This just encourages people to trial and error without the proper information which could result in damage or injury. Pretty much any other manufacturer would supply information. It's not like a major product secret surely? It's simply a data connection!

 

That is such a shame,


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#29 jschires

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Posted 05 December 2013 - 07:52 AM

Ultimately Im looking at going with a different pedal/footswitch. The need to control both amps is a must and so far Ive had no luck with this mod :-( All in a days work...


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#30 fflbrgst

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Posted 06 December 2013 - 05:07 AM

The easy solution would be, obviously, separate FBVs for each amp (especially since you wnat differnet tones on each amp), but that would require some dancing around on pedals on stage - easiest to do changes between songs (or during breaks in a song) only.


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#31 jschires

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Posted 06 December 2013 - 06:32 AM

Having different tones on each amp would still be controllable from one FBV if we could make it work. The settings on each amp can be different as long as they are assigned to the same bank/channel. That was my ultimate goal with this. Having 2 FBV's would be way to much of a hassle during a song that may have several say clean to dirty transitions.


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#32 TheRealZap

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Posted 06 December 2013 - 07:53 AM

you can probably do pretty much what you want with one of those behringer midi foot controllers. i see them pretty regularly for 80-100$ on ebay/CL

(assuming your amps have midi... i dont recall your specific amps)

although i do believe space when he said he made it work... but i'm not terribly adventurous when it comes to putting my gear at risk... so i understand.


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#33 jschires

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Posted 06 December 2013 - 07:58 AM

Unfortunately it doesn't have midi, only RJ45 connection. I believe space did make it work, although you was using 2 different amps if I remember correctly. These are 2 Spider IV's 150 Combo amps.


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#34 broadwood

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Posted 07 December 2013 - 03:29 AM

Hi guys. I haven't forgotten about this. I've recently got some bits together to build a test rig, it's not going to be quick but ill post my findings when they occur.

What I'm doing to get around it is, I bought the line 6 two button footswitch that switches between the settings in a single bank and a kill switch. So it gives me 'some' control albeit limited. Also, ill use the footswitch to experiment with and find out what's what signal wise. This works for me as I like to mix straight sounds from one amp with effected sounds from the other. There's only so many straight sounds you need, maybe one dirt one clean so blending these with the full effected amp sounds great to me. The only bug bear is I have no volume control over the second amp, which is why I'm still interested in getting this going.

Don't lose hope js :0)
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