Disclaimer: Data presented here have been acquired with a pair of stock silicone sleeves inserted at 3mm away from the reference plane of the occluded ear simulator, unless stated otherwise.
CON: Dampers are not exchangeable. With the stock silicone sleeves, there is a risk of bandwidth cut-off above 10 kHz due to the IEM's high acoustic output impedance. Using a stock Comply sleeves, which have a tapered bore, should solve the issue.
ON SECOND THOUGHT #1: As stated by the manufacturer, unlike other quad-driver IEMs, such as Shure SE846, Ultimate Ears UE900, or Westone 4, Primo8's phase response is quite linear. Whether the audibility of such phase anomaly is still very questionable, it can at least safely be assumed that the quad-drivers inside of Primo 8 are behaving more in unity in terms of time-domain than its competitors, thus offering more natural sound. By coupling a pair of pre-packaged dual balanced armature drivers, NuForce is able to minimize any complications in the crossover network design while distributing an sufficient number of drivers throughout the frequency spectrum.
|NuForce's proprietary phase-coherent crossover technology|
the new in-room headphone response target of Dr. Sean Olive of Harman International, Primo 8 is doing extremely well except for a little dip below 100 Hz.
For more information, please visit: