Summary: The AH-C551 is long on build quality and sonic refinement— especially from the midrange on up. On the whole, this earphone’s tonal balance is somewhat bass-shy, meaning that the Demons are better suited for use in quiet environments than in, say, moving vehicles.
Excerpt: Another well-built, nicely thought-out addition to the headphone hierachy from Denon . We'll give a special mention for the most clearly labelled L/R design here (as pictured) plus the extra flexibility offered by their two-part, extendable cable.
Summary: Within the top three sub-£100 earphone models, the Denon C551s are absolutely stunning all-rounders, with clean, powerful bass performance. Combined with the supplied carry case and gold-plated connections, these are remarkable 'phones for the price
Pros: Sound quality, Price, Build, Excellent bass performance, Hard case supplied
Cons: Doesn't use Denon C700 cabling, Slightly weaker with highs compared to lows and mids