Best-Tronics Mfg., Inc. > BTPA.com Best-Tronics Pro Audio Cables and Integration, BTPA.com : Best-Tronics Professional AudioManufacturer of Custom Cable Assemblies and Turnkey Professional Audio Integration Services. All cable assemblies are 100% custom, built-to-order, with a production lead-time of 3-5 days before shipping. If you need your cables faster, please contact us before ordering so that we can try to accommodate your needs.