Unique two way design , speaker acts like a 6 inch full range speaker for highs and mid range becomes 15 inch woofer for lows. Hi Fi speaker, not for guitar. Speaker tested for buzz with tone generator. 8 ohms Pair Altec 420A 15 full range Biflex 15 Speakers Hi-Fi Only. These are not for instrument usage. The item “CleanPair Altec 420A 15 full range Biflex 15 Speakers -Great for TUBE amps” is in sale since Friday, March 12, 2021. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Speakers”. The seller is “soundsbydave-ca” and is located in Chico, California. This item can be shipped to United States.