Like any other company they have different levels of equipment. From entry-level to allegedly competition-worthy gear.
The unfortunate bit about Audiobahn is that their R&D department apparently spends the lion's share of their development research into incorporating the maximum 'bling' into their products as opposed to extracting the most performance out of (*insert random Audiobahn product here*).
In most instances for the money you'd invest in an Audiobahn product your money is better spent elsewhere.
Yes, there are people that report good results from using A-bahn gear but for the most part, for the sole reason referenced above, it tends to not be particularly popular.