Email: For inquiries, please e-mail us at sales@signalcable.com For customer service issues, please e-mail us at customerservice@signalcable.com If you'd like to leave feedbacks regarding our products, please e-mail us at feedback@signalcable.com Phone: We can also be reached at 917-957-8508 during normal business hours. Billing Address: Signal HiFi Inc. PO Box 38 Roslyn Heights, NY 11577-0038