If you need help for technical support, product recommendations, etc., please send us a note. We're happy to help. Be sure to include your telephone number(s) and the best time to reach you. Be as specific as possible about your needs, questions or problems. Have your NHT model numbers handy. Have your purchase receipt handy. We usually reply Monday - Friday within 24 hours (except for weekends) by either email or telephone depending on which is most efficient. Telephone technical support for systems, products and recommendations beyond the NHT speaker or amplifier products will be billed at $25 per 15 minute increments. Have your credit card handy.