Making your selection The Ultra Series Power Wedge® 1118 Power Pack Power Conditioners Power Link Power Cords FAQ Get Our Catalog		Many of you either own earlier Audio Power products or have friends that do. To help you understand the relationships between the older models and our current products, here is a short Audio Power model history. There are three classes of products called Power Wedge. The original Power Wedge models were numbered with Roman numerals from I to VI. These featured single outlets and flip top fuse holders. They were discontinued in late 1992 and replaced by Power Wedge models 110, 112, 113, 114, 116, and 122. These models were in turn replaced in January of 1995 with the Mark II versions. These new Power Wedges offered several improvements over the original generation: A new filter section for amplifiers which simulates some of the benefits offered by a dedicated power line. The new amplifier filter also improves performance for people with very large amplifiers. An improved damping network to further protect source equipment from the effects of an amplifier's current draw. The addition of a detachable power cord using the 20 amp version of the IEC 320 connector. This allows the use of our Power Link 311 power cord with the Power Wedge. A change to Eagle brand receptacles which offer a tighter grip on plugs. Cosmetically, these units are identical to the earlier units with the exception of the detachable power cords. In order to keep the price increase for the improvements as low as possible, we decided against renaming the units. This minimized the cost of revising our unit chassis. All units with detachable power cords are new, Mark II models. The changes in the Power Wedge family over the years have been evolutionary. As we have learned how to improve performance or found a better part, we have implemented the changes in the next model. Frequently, changes are the result of input from dealers or end users. As a result, the difference between a Power Wedge 116 and a Power Wedge 116 Mark II is not "huge", but it is clearly audible. However, the difference between a Power Wedge I and the Power Wedge 116 Mark II will be much more dramatic, reflecting the multiple improvements over the years. The Power Wedge Ultra series is a major evolution of the product line. It includes many new and innovative features that provide a significant performance increase over previous models. Some of the new features are new individual transformers that can be user configured for fully balanced operation as well as more traditional operation modes, individual high frequency filters at the output of each transformer, and a component style chassis with engraved front panel to better fit in with other high quality components. The Power Pack line used to include a model called Power Pack I. The Power Pack I was identical in performance to the current Power Pack II, but was enclosed in a chassis that looked more like the Power Wedge 110. The Power Pack II out sold the Power Pack I by a large margin, and the Power Pack I was discontinued in late 1994. This allowed us to concentrate production on the popular Power Pack II model.