Magnetic Reference Laboratory (MRL) makes and sells Calibration Tapes for analog audio magnetic tape reproducers in the Open Reel format. Founded in 1972, MRL has been in continuous operation for over 50 years.

How To Order

• You may order directly from MRL. Contact us by e-mail at orders@mrltapes.com
• With each direct order, please include:
  • Full name
  • Business or organization name
  • Billing address
  • Shipping address
  • Phone number
  • For each order item, please indicate the part number (either the 6-character or 12-digit SKU)
• Payment method:
  • Credit card orders: we will send you an email with a secure payment link, and an invoice . We accept all major credit cards: VISA, Master Card, Discover, and American Express.
  • International monetary transfers: please email MRL for instructions.
• Delivery: Orders typically ship in 2–4 weeks because we now make all tapes to order. If you require your order to be shipped by a deadline, place your order at least two weeks before that date. Don't wait until the last day.
• Order Status: You can still check our Order Status page for shipping date estimates, but updates may be less reliable as we work to get our online store up and running.
• Sales tax of 9% will be added to orders shipped to Santa Clara County, CA; or 7.25% to orders shipped elsewhere in California. (We are not required to collect, and we do not collect, any other district taxes).
• You may also place your order with one of our dealers -- this may be easiest for you if you have an account with them. See the list of MRL USA Dealers or MRL International Dealers. If your favorite dealer is not listed, ask them to contact us about becoming an MRL dealer.