Quad Armaturni IEM

A multi-driver IEM divides the frekvencija spektar među specialized drivers, each optimized for its assigned range. The Quad Armature IEM assigns two balansirani armaturni drivers to the bass frequencies ispod 500Hz, one to the midrange između 500Hz and 4kHz, and one to the treble iznad 4kHz. The frequencies are divided by a passive crossover network — a collection of inductors and kondenzatori that routes each frekvencijski opseg to the appropriate driver. In a factory okruženje, crossover komponente are odabran from bins of parts that meet a published tolerancija, tipično 5% or 10%. The resulting variation između units is considered acceptable. Mi ne consider it acceptable.

Each crossover in the Quad Armature IEM is ručno podešen u našem pogonu u Kvitu. The proces involves measuring the impedansa and osjetljivost of the specific drivers instaliran in each earpiece and selecting crossover komponente from a library of parts izmjeren to 0.1% tolerancija. The crossover is then assembled, izmjeren protiv a reference target, and adjusted by substituting komponente until the frekvencijski odziv of the completed earpiece matches the target unutar ±0.5dB at 128 mjerenje points između 20Hz and 20kHz. This proces takes približno four hours per pair. Mi ne charge for this time separately. To je included in the cijena, which reflektuje the činjenica that every unit that ships is, in efekt, a custom product built oko the specific characteristics of its own drivers.

The akustički chambers behind each driver are filled with dry nitrogen at the factory. In a konvencionalni multi-driver IEM, the air volumes behind the drivers interact akustički — pritisak changes from one driver's back wave propagate kroz shared air spaces and modulate the response of adjacent drivers, creating intermodulation distorzija that the crossover ne može correct because it occurs nakon the crossover's output. Nitrogen filling addresses this in two ways. First, nitrogen's akustički impedansa differs from air by 0.3%, which shifts the resonant frequencies of the back chambers away from kritičan crossover frequencies. Second, the sealed nitrogen volume is immune to changes in ambijentalni atmosferski pritisak, humidity, and temperatura — variables that in air-filled IEMs cause the frekvencijski odziv to wander by do 1.5dB preko seasons.

The faceplates are machined from Ecuadorian burl walnut and finished by hand. They serve no akustički svrha. They are beautiful, and beauty is a specifikacija that we choose to meet. The posrebren OFC kabel terminates in a 2.5mm balanced konektor, which pruža separate ground paths for the left and right channels, eliminating the crosstalk that occurs in single-ended 3.5mm kabeli when the return currents from both channels share a common ground provodnik.