Vox AD120VTX, AD60VTX Specifications

NERDY IMPEDANCE INFORMATION AHEAD

The following is some infor mation that you’ll find useful for hooking external cabi-

nets up your Valvetronix AD60VTX or AD120VTX combo. When you’re done with

this, you’ll be a smarter and better person! Plus you’ll know the correct way for

hooking up speaker cabinets in series.

In multiple speaker cabinet configurations, you will have to use a little mathematics

(Ohm’s law) in order to figure out the correct setting. Don’t worry though; it’s easier

than you might think! The for mula below is for hooking up external cabinets up in

series, which is what we’re using here on the VTX amps.

In a series configuration, all you do is add the individual impedances of the cabi-

nets. For example, if you hook up two cabinets, where each is 8 Ohms (8 + 8), the

result is 16 Ohms. If one cab is 8 Ohms and the other is 4 Ohms, the total imped-

ance is 12 Ohms. There are no 12 Ohm settings on amps, so set your VTX amp to

16 Ohms.

R1 is the impedance of our first cabinet; R2 in the impedance of the second one

and R3 is the resulting impedance when they are hooked-up together.

R3 = 8 + 8 = 16 Ohms

Specifications

Number of amp types: 16

Number of effects:

Drive types: 10

Modulation types: 5

Delay types: 3

Reverb types: 3

Noise reduction: 1

Number of programs: 32 (8 bank x 4 channel)

Number of inputs:

AD60VTX

Top panel: 2 (High & Low)

Rear panel: 1 x Loop return

1 x Foot controller jack

AD120VTX

Top panel: 2 (High & Low)

Rear panel: 2 x Loop return

1 x Foot controller jack