1) A switching jack (cliff) was wired in SERIES between the Fender combo amp and it's speakers. It was wired up to be an input to the speakers, NOT an output from the Fender amp.
This enabled the Fender combo's speakers to be used as if they were a separate speaker cab.
2) The Fender speakers were re-wired so they would be in SERIES (16 ohm). The stock wiring had been parallel (4 ohm).
This was because the Vox amp had an extension speaker jack that was rated for 16 ohms, and the Fender speakers were to be used as an ext.spkr. for the Vox amp.
This enabled the Fender combo's speakers to be used as if they were a separate speaker cab.
2) The Fender speakers were re-wired so they would be in SERIES (16 ohm). The stock wiring had been parallel (4 ohm).
This was because the Vox amp had an extension speaker jack that was rated for 16 ohms, and the Fender speakers were to be used as an ext.spkr. for the Vox amp.