Q: What are the differences between S100 1394 A/V cables and S400 1394 A/V cables?
A: S100 cables can only transfer data at 100 mbps while S400 can transfer data at up to 400 mbps, about 4 times faster than S100 cables in terms of transfer speed. In addition to transfer speed, S400 cables are better shielded to reduce EMI effects. Devices EMI emissions are reduced by an average of 3.6 dB from FCC limit when a 1394 device is connected to a host computer via a S400 cable.

Q: Why are S400 cables capable to carry more data with less EMI effects than S100 cables?
A: First, the shielding is different. For S400 cables, each signal pair is individually shielded and the two pairs have an overall shielding. Totally, there are three shieldings. For S100 cables, there is only one single shielding. Second, the wiring technique used in assembling the S400 cables is different than that in assembling S100 cables. As a summary, proven by testing data and real life applications, the special cable construction and wiring techniques enable S400 cables to transfer more data with less EMI effects than S100 cables.

Q. Are S400 1394 A/V cables also called p1394a2.0 compliant A/V cables?
A: Yes. The p1394a draft 2.0 is the most current version of IEEE1394a specification. The specification for S400 is listed o in p1394a2.0.

Q: As an user without knowledge of cable assembly, how can I tell the differences between a S400 cable and S100 cable?
A: The S100 cable is much thinner than the S400 cable since it is only shielded once. You may see some S100 cables carry two "big" ferrite cores on each ends because the EMI would be a problem without having the cores.

Q: Are Newnex 1394 A/V cables S400 cables?
A: Yes. As matter of fact, Newnex is the first company in the industry to manufacture S400 cables, both in 6 to 4 and 4 to 4 configurations (CFA-64xx series and CFA-44xx series),

Q: Where can I get more technical information about Newnex S400 cables?
A: Please send your inquiries to support@newnex.com