Wiring a 4/8 ohm output transformer | The Gear Page

Consider ditching the whole shorting jack thing, and protect the amp from the open secondary condition by wiring a 220 to 270 ohm resistor across the 8 ohm output (Traynor style), rated at about about 1/4 to 1/3 of the amp power.

View our speaker wiring configuration diagrams to properly match speaker load with your amplifier’s output impedance to get maximum transfer of power. ... Two 8 ohm speakers = 4 ohm load Two 16 ohm speakers = 8 ohm load:

Output Taps: 4/8/16 ohm X Mount with 3-1/8'' 2-hole centers. Wiring Diagram. All Mojotone Transformers are made in the USA. Quality, Reliability, and Excellence are what make our transformers the best around. Please use caution when referencing these wiring diagrams.

Thanks for the info guys. My valve jr. just has one speaker output jack marked 4 ohms. I see on the OT that is has 4 ohms and 8 ohms leads and the 8 ohm one is marked and not being used. I always thought that it was ok to run 8 ohm cab. on a 4 ohm output but never run a 4 ohm cab on 8 ohm output.

Output Taps: 4/8 ohm X Mount: 3-9/16'' 2-hole centers. Wiring Diagram. All Mojotone Transformers are made in the USA. Quality, Reliability, and Excellence are what make our transformers the best around. Please use caution when referencing these wiring diagrams.

Or, in Parallel: 2 X 4 Ohm Speaker = 2 Ohm Load; 2 X 8 Ohm Speaker = 4 Ohm Load; 2 X 16 Ohm Speaker = 8 Ohm Load Four Speakers Remember: 1. Match impedances (ohms) - all speakers in the same box should have the same impedance 2. Power handling - as a rule of thumb, when mixing speakers in a four speaker cabinet, maximum power is 4 x the lowest ...

It is really not suggested to wire different resistive load values in Parallel (8 and 4, 16 and 8 etc.) The formula for figuring the total impedance in Parallel is the multiplication of the two loads divided by the sum of the two loads - i.e. putting two 8 Ohm speakers in Parallel results in a 4 Ohm load.

There are a couple posts about how to wire output jacks so I thought I'd draw some ... 2) Shorting jack 3) 2 jacks one MAIN(shorts if not used) and one EXT.(use if needed but does not short) 4) Seperate 4/8 ohm jacks(non shorting~does not short if nothing is plugged in) 5) Seperate 4/8ohm ... Transformer Wiring Diagrams: Hoffmanamps Facebook page:

In example 1, we have a 50W amp with an 8 ohm output impedance. It has been matched to one 8 ohm speaker. Since there is only one speaker, it could experience the entire 50W from the amplifier. In this case we recommend choosing an 8 ohm speaker with a rated power of at least 100W. Example 2: Series Wiring ×

For example, a typical loudspeaker impedance ranges from 4 to 16 ohms whereas the impedance of a transistor amplifiers output stage can be several hundred ohms. A classic example of this is the LT700 Audio Transformer which can be used in the output stage of an amplifier to drive a loudspeaker.