Receiver Diaphragm: 6u, 9u and 12u are usually used in the thickness of the diaphragm. The thinner the diaphragm is the higher quality of the sound is, and the price is higher as well.
Rated Input Power: For normal operating.
Impedance: The direct current resistance is measured by ammeter. 16, 28 and 32 ohm are often seen.
Channel Balance: The difference of SPL between the left and right side on 1000Hz. Sensitivity (S.P.L.): The sensitivity is measured by decibel meter in the distance of 10cm. The 3.5phi plugs usually apply to MP3 and CD player; the 2.5phi plugs apply to cell phone and PDA. If add the microphone function, there will be one more section but the total length is the same.
Parallel Capacitance: The capacitance is for filtering the unnecessary noise signal.

Receiver Diaphragm 單體喇叭膜片厚度,常用有6u,9u,12u厚愈薄的音質愈好,也愈貴
Rated Input Power可正常工作的適用電壓範圍,
Impedance正以電表測得之直流阻抗,常見有16,28,32ohm
Channel Balance左右耳在1KHz時的音壓差異,
Sensitivity (S.P.L.)加Db表在距離10cm測得
Plug 3.5phi多用於MP3,CD player,2.5phi用於手機,PDA,若加麥克風的功能,會多加一段,總長度不變.
Parallel Capacitance 電容用來濾除不必要的雜訊.

Monotype: We can often see the diameters of 10, 13, 15 and 16 phi, and the diaphragm of 6u, 9u and 12u.
Casing: The plastic case is the most popular; there are also some high price earphones made from aluminum and titanium.
Wire: The main material is PVC, and there are many different types of ropes to choose; the length of 1.2M and 1.4M is popular. A good wire performs well in tension test and is able to bear the numbers of twists.
Microphone: It is able to assemble a microphone on the wire with a switch.
Volume control: Assembling another resistance to control the volume.
Plug: Diameter: 2.5, 3.5, 6.0 phi. 2-4 sections are possible. There are nickel-plating and gold-plating to choose. Angle: 90, 135, or 180 degree.
Package: The earphones are bound with cable tie in a plastic bag, or OEM pasteboard package.
Color: Normally the colors are black, white, silver and gray. We also provide color sample for special requirement, but have minimum order quantity.

單體 常見有10,13,15,16phi,膜片6u,9u,12u.
耳殼 以塑膠外殼最為常見,也有鋁或鈦金屬的高價位耳機.
線材 PVC為主,可再外被不同類型的吊繩,常用的有1.2M,1.4M長度,好的線材,拉力強,耐曲折次數高.
麥克風 可在線上加麥克風,附On/Off開關.
音量控制 可在線上多加一可變電阻來調整音量大小.
Plug 分為2.5, 3.5, 6.0phi,都可做2-4段,鍍金及鍍鎳,角度有90度, 135度,180度的.
包裝 以束線帶包紮,塑膠袋裝,也可替客戶代工紙卡包裝.
顏色 常用的有黑/白/銀/灰,若要指定色需提供色卡,及有MOQ的限制.