To place a secure Internet order for the  Felston DD740 at $249 plus $9.95 shipping within the continental US click the "Buy Now" button below. You will also have the option to pay over 6 months with no interest: 

For orders outside the continental United States:


Often local value added taxes (V.A.T.) and duties may be collected upon delivery in your country. Since you must be present to pay those fees it often delays delivery and may require a trip to collect your shipment.

Because of that inconvenience (and often higher cost) we have listed the DD740 on eBay so you can take advantage of eBay's International Delivery Service which prepays all those costs:

Total cost is "usually" less and it is far more convenient but we are still happy to ship direct via USPS Priority Mail if you prefer.

If you prefer us to ship direct via Priority Mail (you may pay fees upon delivery) please CLICK HERE


 100% Satisfaction Money Back Guarantee!

In addition to Felston's one year product warranty offers a 14 day money back return privilege for any reason whatsoever.


To place a phone order, call:
 9am to 5pm E.S.T. Monday -Friday

Or mail orders to: LipFix Technology, 5206 Pinestraw Road, Columbia, SC  29206


Building upon the proven DD340 and DD540 digital audio delays which came before it the DD740 includes lip-sync correction features no A/V Receiver offers:

  • Four Digital Audio Inputs: 2 Toslink and 2 Coax

  • 680 ms delay at 48 KHz or 340 ms at 96 KHz

  • 36 Presets (9 per input)

  • Numeric Delay Entry

  • Tweaking in 1 ms and 1/3 ms steps

  • On-the-fly adjustment with no image overlay

 For more product information on the Felston DD740
please visit:

Or download the DD740 Owner's Manual below. We have included the manual for Felston's second generation two input model, the DD540, for those who may be considering a pre-owned unit available from our customers upgrading to the third generation DD740.