My tube amp is making sound with the speaker plugged in, but the sound is not the speaker.?

Question by Phillip: My tube amp is making sound with the speaker plugged in, but the sound is not the speaker.?
I bought a vintage Stromberg Carlson Signet 33 tube P.A. head at a local antique shop. All the tubes seem to be in good condition and every thing turns on fine. Everything seems to be in decent shape, even the point to point wiring. I ran my iPod through the phono jack that bypasses the preamp stage, and I had a 6 ohm speaker plugged in(that was all fine and dandy, but I might try

Read more about amps and subwoofer...