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...by going from the first amp into the 2nd amp's efx loop in?
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12-17-2017 03:47 AM
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I guess you'd get some distortion on the second amp due to the hotter signal coming from amp 1's effects send. If amp 1 has two inputs / channel you can daisychain them by plugging into into input 1 and connecting input 2 to the second amp.
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If the amp has an open back surely you could solder a jack plug to the speaker lugs and avoid the second amp entirely, just use it as a speaker cab?
Or a/b/y pedals (I may have the name wrong) which allow you to run your signal into two amps. I would think that would work well too.
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Whoa! Do not put the speaker output of Amp1 anywhere near the fx return of Amp2. You are likely to kill both amps.
Originally Posted by Woody Sound
You maybe able to link the fx send of A1 to fx return of A2, but you need to know how well the impedances and levels match.
Why are you trying to do this?
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Right! Originally Posted by newsense
Why not use both amps (AB-Y switch)??
[or buy an actual extension cab…]
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If you are just looking at amp #2 as a speaker cab, you may be able to unplug the speaker fromamp #2’s power amp’s output and plug the speaker into amp #1’s auxillary speaker out. An example pictured below is a SuperSonic 22 with the correct speaker outs. I would not mess with the fx loop.
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Definitely do NOT connect the Poweramp out of Amp1 with the effects loop of amp 2!!! If you have an extension cab out on amp1 you can connect it to the speaker of amp 2 but pay attention to possible impedance mismatches! If you do not have an ext cab out you may be able to disconnect the speaker from amp 1 and use the one on amp 2. Make sure to NOT use an instrument cable but a speaker cable! It is better to use a dedicated extension cab of correct impedance if you want a bigger sound.
The absolute greatest gadget if you want a small amp to sound big is the Fryette power station.
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All excellent points. As I was trying to explain in my example, amp #2 is off and in the case of my SuperSonic there is enough slack in the amp’s speaker cable to go to another amp stacked on top. Originally Posted by Frank67
Yes, ohms need to match.
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I have a couple of old silver Deluxes in need of repair. In an emergency, I have used them as extension cabs, hooking them up to my rack with speaker cables and this style adapter.Amazon.com: GLS Audio 1/4" Coupler Female TS Plug Jack Adapter - 1/4 inch to 1/4 inch Barrel Mono Full Metal - 4 Pack: Industrial & Scientific
It's not an ideal long term solution, but worked for the gig.
PK
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When in doubt, read the instructions!!!!
Best if you read the amplifiers owner's manual about this question.
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I've used a second amp as an extension in a couple of ways. One is to just use the speaker, disconnected from the amp, and the other is to use the line out of one amp into the input of the other. Modern heads usually have both a speaker out and some sort of line out, and you can use either, depending on how you prefer to do it. Using the line out is the easiest way, since you don't need to disconnect the speaker from the combo being used as a cabinet, plus you can use the controls to change the tone, volume, etc. It works in a pinch, but I wouldn't want to have to do it full time. Just do not, ever, connect the speaker output to the amp input. That will not result in a pleasant outcome.
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I recall that an old Twin I had was set up like this. The wires to the speaker actually had a 1/4 inch plug on the other end (not at the speaker) which plugged into the back of the amplifier chassis. If you unplugged it, the speakers were not connected to the amp in any way.
So, if you wanted, you could connect the speakers separately to another amp. The only issue I'm aware of would be the impedance matching. As I understand it, you don't want the impedance of the speakers to be too much lower than the amplifier expects. In that situation, the amp overworks itself by trying to put out too much power (sort of in the direction of connecting the terminals of a battery together with a piece of wire -- it will heat up quickly as the battery tries to dump all its juice at once). Something could fry.
It wouldn't be difficult to cut the speaker leads and solder in a jack to replicate the Twin's setup, but the impedance would be the thing to check out in advance.
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My Vibrolux Reverb is that way. The speakers connect to a 1/4" plug, which plugs into the speaker output jack of the amp. There is also a 1/4" jack next to it for an extension speaker. I've used the Vibrolux as a speaker cabinet, but it's not ideal. I was really just trying the other amp for sound. If I have to lug that heavy thing somewhere, I'd just use the amp, not carry another one. But it does increase the versatility somewhat. I've also connected my RE cabinet to the VR, and that works, but again, it's certainly not portable. In an emergency, though, it's possible to use those features to get some working sound.
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The simplest, safest thing is an A/B box. They're not that expensive.
An alternative would be to unplug the extension speaker from its amp, get an extension cable and plug it into the main amp's aux speaker out. However, you've then got to consider the ohms, especially with a tube amp. You need to know how many ohms your amp is looking for and what's the combined load with the two speakers. You've also got to remember to plug the extension speaker back into its amp so you don't end up running it without a speaker load.
The box is a lot simpler, and cheaper than replacing a blown amp.
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Originally Posted by Woody Sound
Actually i think it would work, but i wouldn't dare doing that unless the two amps were completely identical.
I sometimes use a Y adaptor plugged into amp 1 and connect the guitar to one of the jacks, the second amp to the other. Maybe it wouldn't work so well if i didn't use a 3 Band Carl Martin Parametric Preamp in front of it.
If you consider this option, let me know - i can check if it works without the preamp.
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Or...you can get yourself some kind of a splitter box or a stereo chorus pedal and plug into the inputs of the both amps and use them in stereo.
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get something like this.. LEHLE
its safe, and also can help with noise and phase cancellation issues between the two amps that can kill your sound. I use it with acoustics sometimes as well just for the phase switch
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Thanks for all your answers/advice/warnings. I'm feeling pretty foolish
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If it's an amp that has (like a Fender) a jack from the back amp panel to the speakers, this is easy-peasey. I did this with my Polytone Baby Brute once. I went from my Polytone to my Teisco Professional (two 15" alnico speakers in a 4-ohm load). The Polytone sees a 4-ohm load into its internal speaker. Rather than run things at a 2-ohm load--very hot--I sent the signal to the Teisco speakers instead of the Polytone 8" speaker.
For the gig I was playing--a solo guitar gig playing all kinds of music--I'm not so sure but that this wasn't the best that the Polytone _ever_ sounded. I could have also used the internal speaker...but things already run pretty hot in that little one cubic-foot Baby Brute cabinet.
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Hey Woody, I hope you're joking with that comment! There are so many fine points about "gear" technology, it's impossible to know it all! We're all still learning. Originally Posted by Woody Sound
Thanks for all your answers/advice/warnings. I'm feeling pretty foolish
Marc
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Seconded! Originally Posted by marcwhy
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