The Fender BXR115 (100 watt, 1x15) practice amp I use has just torn its speaker. It's 4 ohms. What is the cheapest possible replacement I can get, that you would suggest? Thanks.
partsexpress.com Good cheap eminence replacements. Unless you want to go to radioshack.... *shudders*
alpha series, or gamma series would probably work well. If you are looking just for an ok replacement. If you were really into it, you could get a speaker that was tuned to the box you are putting it in. But as you said, it's just a practice amp.
A lot of these are 8 Ohms. How can I use the speaker in the combo? The old speaker was 4 ohms. Sorry for the newbie questions!
This is a combo, and the dimensions of the entire thing are 25.5" x 21.5" x 13.5" . It's mostly empty space.
About 5 inches.. I am mostly concerned with getting the combo in working order and less picky with tone.
Make sure you replace it with a 4-ohm speaker! If you get an 8-ohm speaker, it'll literally cut your power in half. You may get only 50 watts out of your amp as opposed to the 100w rating with a 4-ohm'r. Try Speaker Max they have pretty good speakers and pricing.
www.steelsound.com also has quality speaks. A buddyof mine built a whole PA with their stuff recently and it cranks (Cab design helps a lot too.)