Quantum Technologies, Inc.

Customer Service Service Center

Quantum Technologies

For phone support, call:

(256) 922-1200

Skype Call - QTISVC

To contact technical support by email, send a message to

Please provide the following information so we can provide you our best customer service:

  • name
  • company name
  • shipping address
  • daytime phone
  • email
  • detailed description of your problem or request with applicable product serial numbers
NOTE: For Hear Technologies product repair or service, please visit www.hearback.com

Authorized Warranty Service Provider

Hear Technologies
Crest Audio
Marshall Amplifiers
QSC Audio
Randall Amplifiers

Equipment Repair & Service Center

Quantum Technologies offers full precision service on professional audio equipment. With 45 years' experience, our certified electronics technicians provide personalized, high quality repair of pro audio equipment and musical gear (excluding guitars).

Our Commitment to Quality
Repairs are warranted for 90 days from repair date. Vacuum tubes are warranted for 30 days. Unrelated failures and client abuse are not covered.

Shipping & Payment
Quantum Technologies will pay regular ground shipment charges on QTI Service Center and Hear Technologies warranty repairs only. Any special shipping requested will be the responsibility of the client. Payments are normally accepted via PayPal. You will receive a separate invoice from PayPal referencing the Repair Service Order or Service Invoice. You do NOT need to have a PayPal account to use this service - you can use a credit or debit card. We accept VISA, MasterCard, American Express, and Discover.