WebWahl's Appliance & Mattress is located at 1805 Prairie Ave in Beloit, Wisconsin 53511. Wahl's Appliance & Mattress can be contacted via phone at (608) 365-4920 for pricing, hours and directions. Contact Info. (608) 365-4920. Questions & Answers. Q What is the phone number for Wahl's Appliance & Mattress?