The 5F11 Vibrolux is similar to a Deluxe in size and output, but has lower gain overall, due to the presence of tremolo. The driven sound is great on this amp, and the tremolo gets plenty deep. This amp has stayed in great shape, aging to a beautiful amber hue, with minimal scrapes and blemishes throughout. The speaker is a Jensen Concert from 1967, and does great justice to the P10Q that would have come stock in this amp. Internally, the power cord has been changed, and the electrolytic caps have been swapped and rehoused in the cardboard of the originals. The original Astron coupling caps have been swapped for modern equivalents, but all of the original carbon comp resistors still remain.