two heads/one speaaker ?

[allsavy]

My combo is a one trick pony with mostly fender blues tones and I'd like to a/b switch between it and another head tweaked for drive sounds.
Can I feed both outputs to the same speaker and simply a/b y ??? the input?
What might the loading effect be?
Is this harmfull?

[selloutrr]

ultimate attenuator makes a head a/b box i've seen mark play it at the village a few times it seems to work well.

[allsavy]

An a/b box specifically made for the out put you say.
Kinda tells me there is more at play here than what I thought.

[pureoldsound]

Maybe this: http://www.tonebone.com/tb-headbone-vt.htm

[selloutrr]

here is a link http://www.ultimateattenuator.com/ultim ... tcher.html

[Kregg]

One of my favorite haunts is bound to fill your needs: http://www.loop-master.com/

In the "ABY" section, look at the "Y splitter".

[allsavy]

WOW... 3 bones $$$

Wouldn't a dummy load and a relay work?

[selloutrr]

I'd assume the $300 is for a working product and a guarantee it's not going to blow your gear up.
After you consider parts and labor and the replacement cost if you aren't right the first time $300 isn't so hard to come up with.

But if you really want to build one...

Yes in so many words a relay and dummy load will work but you have to be sure to close one head before you open the next in the circuit.

If you used several relays one to open and close each head and another dedicated to do the switching from the cabinet to the dummy load you shouldn't have problems with overloading. just to be on the safe side I'd run an overspec'd cabinet and 8 to 16ohm load.

Make sure you over spec the dummy load keep it in a place it can breathe they tend to get hot!!!

[allsavy]

thanks for the advice. Some guys would cut me down for venturing such a question but you took the time to provide a reasonable response....I'll be sure to mention you in my will LOL!
I havent blown anything yet!
but there will come the day i'm sure.
Anyway, this is a bit like buying the bargain hunter paper every week so read about the deals...but seldom actually follow through and buy something.

[Jana]

The thing to keep in mind with this, as selloutrr mentioned, is that you never have a situation where one head is unload, even for a moment. If you do, you are going to blow it eventually, if not sooner.

Just a thought, for the amount of money, research, and potential problems you would have with this, why not buy/build another cabinet? That would open up a wider range of sounds anyway. You could then have a simple A/B switcher from your guitar to the inputs of the amps. Select one, the other, or both. A stereo effect, like a delay or etc. sounds really cool going to two amps as well.

Just a thought.


(edited typo)

[Bob-I]

WOW... 3 bones $$$

Wouldn't a dummy load and a relay work?

Not exactly, you need a tad more.

To be really safe you need a fairly high resistance load on the speaker out all the time. 500ohm 25 watt should do it. Then you also need to switch the input so that the input on the unused amp is grounded.

So 2 relays, one of them fairly high powered, and 2 load resistors, plus a power supply.

I bought a Tonebone used for about $150. Works great and I trust it completley with the amps that I've spent many hours building.

[allsavy]

ok...thanks for the education all :)

[Tubetwang]

Jana took the word off my mouth...again...

Skip the trouble and build another cab...