Dual mono - Please explain

jdogric12 · Post by **jdogric12** » Thu Oct 26, 2006 10:06 am

Sorry, but for the millionth time, can someone explain to me how the dual mono on a v64 works? Thanks gang - J Dizzle

jps · Post by **jps** » Thu Oct 26, 2006 1:47 pm

Plug jacks into two different amps. done!

jdogric12 · Post by **jdogric12** » Thu Oct 26, 2006 3:04 pm

Just did. Same thing on both outputs, right?

jps · Post by **jps** » Thu Oct 26, 2006 3:19 pm

Yes, so you can use one with effects and one straight, for one example.

jwr2 · Post by **jwr2** » Thu Oct 26, 2006 4:21 pm

When the Ric-o-sound got weird on my 2001 4003 I rewired it with 2 mono outputs ... a built in signal splitter ...

beatlefreak · Post by **beatlefreak** » Thu Oct 26, 2006 5:25 pm

The two mono jacks are wired in parallel. If you use both outputs, each one will be reduced output.

jwr2 · Post by **jwr2** » Thu Oct 26, 2006 6:41 pm

no dropoff at all ... I have 2 basses wired that way and it works fine ... although 99.9% I use a single mono output ... I just tested it running 2 mono outputs ... no reduction in output ...

The main advantage of 2 mono outputs is if one goes bad then you plug in the other one ...

beatlefreak · Post by **beatlefreak** » Thu Oct 26, 2006 7:06 pm

Power divides in a parallel circuit. For two amps with equal input impedance, the power would divide in half. This causes a -3dB drop in each amp input. 3dB is the minimal amount of difference that the human ear can discern. You may not hear any difference, but the input to each channel is less. This is basic electronics.

jwr2 · Post by **jwr2** » Thu Oct 26, 2006 7:23 pm

but it is actually louder because it is going into 2 amps ... more power ... more volume ... more speakers moving more air ...

but a better way is to run one mono into one amp and run the second amp as a slave ...

doctorwho · Post by **doctorwho** » Thu Oct 26, 2006 7:44 pm

Just use an amp that goes to 11 ...

teb · Post by **teb** » Thu Oct 26, 2006 9:52 pm

I just rewired my 12-string with two mono jacks. I had previously wired-in a toggle so that I could mix the middle pickup in with either the neck pickup (toaster) or bridge pickup (toaster-covered high-gain) or turn it off. I played around with another toaster and with another high-gain in the middle position and didn't feel like either one really added very much to the overall sound. I also noticed that when using the JangleBox that it did great things for the highs, but really weakened the low end, which I didn't like. I bought a Ric-O-Sound box to see about splitting the signal to run one through the JB and one straight to add some bottom but it just didn't do what I wanted either. So, I sent it back, pulled the old jacks and put in two mono jacks. The "normal" jack now runs the neck/bridge combo with the original toggle and fifth knob just like a stock 360 and I run it into the JangleBox and one amp channel or amp. The middle toaster now runs straight to the second jack and to a different channel or a different amp. I have a knob and a pot for volume ordered for it, but at the moment it's just wired right to the jack. In any case, the mid pickup now really adds something to the sound and I can mix-in as much of that nice, toaster bottom end as I want with the bright stuff coming out of the JangleBox. Two cords and two channels is a bit more hassle, but I played a bass set up that way for years without a problem and the sound quality is much fuller and richer.

geddeeee · Post by **geddeeee** » Fri Oct 27, 2006 8:26 am

Er... why???

jdogric12 · Post by **jdogric12** » Fri Oct 27, 2006 3:41 pm

Hmm. Cool. Why not? Sounds pretty cool to me.

doctorwho · Post by **doctorwho** » Fri Oct 27, 2006 10:37 pm

One other use of dual mono output is when comparing two amps in order to determine the settings on each that gives the "same" sound. I did this with my 370/12v64 and was able to dial in my Crate GX40C+ settings to closely match the output from my 1968 silverface Fender Twin Reverb.

jdogric12 · Post by **jdogric12** » Sat Oct 28, 2006 4:04 am

Very cool idea, Gary. I will have to try that.

A 370/12v64??? Enlighten the dog, please. Was that like a special run for Norm's or something?