Hi Alan and thanks for the response. The only reason I need to get to the speaker is to verify it is in circuit and that it is in good condition. I don't plan on removing it. The previous owner said "it needs new speakers". I checked the small side speakers and they look fine. My guess is the speakers are fine and the amp has distortion from bad capacitors, tubes or other components. the only component I have changed so far (1000uF on the junction box) leaked at 25V so I don't expect the other electrolytics to be any better. Time will tell. According to the manual, the bass speaker is 12 inches. I just didn't see where it could possibly fit. My unit has the Mediteranian front panel and silver crown grille. The unit is complete but I don't want to power it up until I take care of the electrolytics and test the resistors. All those transformers look expensive. Can you tell me exactly where the bass speaker access panel is located (top, bottom etc). The manual does not have a diagram showing it's location. Thanks for your time, Watt.