JVC Kenwood, in late November canal type of dynamic type of JVC brand as Earphones (earplug type, etc.), with the ultra-compact subwoofer, incorporating new technologies "HA-FXZ100" and "HA-FXZ200" released. The price is open price, "HA-FXZ200" over-the-counter expected price is around ¥ 25,000, "HA-FXZ100" is about ¥ 18,000.
2 model development concept of "balance of bass and treble in high resolution realistic." Headphones on the market today, like type and high-resolution monitor, model that specializes in bass, but are gaining popularity, it was challenging to balance these two elements.
■ Equipped with a subwoofer to the earphones
In order to realize bass reproduction with a voluminous and resolution, have adopted a mechanism called "stream woofer" features. Equivalent to a so-called sub-woofer speaker, using one group units diameter 8.8mm. This, combined with the full range of the diameter of 5.8mm × 2 unit that is responsible for the mid and high ranges the "twin system unit", a total of three units of the group dynamic type is installed. JVC Kenwood has been named in the "Live Beat System" combined "twin system unit" and "woofer stream this".
For mounting of the subwoofer, and will give a deep bass in units of "One, senior engineering specialist two Taku Miura design group first third part of the product design Technology Division Group HM Home & Mobile, and to emphasize the low range, bass, etc, or wear in mid-high range, adverse effects also. would come out, hard. therefore, that the earphones over the amount, or adopt the larger units, increasing the size of the enclosure is responsible specializes in the bass I say, "I thought to try and make the ultra-compact subwoofer.
However, the size entering the earphones, because there is no element that cuts the frequency range above 100Hz from the network, looking for ways to drop in the low-frequency acoustic. I have applied the method "Kelton" used in the subwoofer speaker. This is what it wrapped in the front and back of the woofer enclosure, called out the bass from there only provided the duct.
There is no longer or duct to take a lower resonant frequency, only the fine, because there is a limit to long narrow duct adopted in the earphones. Covered with a metal base woofer unit, through a stream duct long, narrow, low emission only from there. Has become a mechanism to mix the sound of the twin system unit that is responsible for the mid and high ranges, delivered to the ear canal.
Finally, to 0.4mm, the inner diameter of the stream duct length was 30mm. Was worried about prototype "is? With no output can only bass of about or can take the sound pressure was also used needle instead of duct fine. From where fine here? Can not hear, I was able to put out the bass pretty pretty . rather than a mere bass, aimed at the "bass" real "that (Mr. Miura).