?? _ ?좉컼吏???_ 湲곗?吏???/font> _ Speaker / Receiver Technology 
 
   Concept of Frequency Response Chart
? Rated Input
- To allow the speaker to operate adequately
- Required to meet the following tests
  Operating test / Distortion test / Life test
Where, P : Speaker input(W)
V : Voltage in Coil / Z : Impedance(?
? Frequency Response (SPL)
- Speaker : Use baffle box / 0.8, 1.0, 1.2, 1.5kHz AVG
- Receiver : Use ear coupler & earpiece / 1kHz
? F0
- The fundamental resonant frequency
- Max. SPL / Max. Impedance
? Impedance(Z)
- The nominal impedance is defined as the minimum value to the right of the Fo under free field conditions.
- For this application the impedance is defined
at a frequency of 1.5 ??, 1.0V
 
While Ohm's Law applies directly to resistors in DC or in AC circuits, the form of the current-voltage relationship in AC circuits in general is modified to the form:
 
 
where I and V are the rms or "effective" values. The quantity Z is called impedance. For a pure resistor, Z = R. Because the phase affects the impedance and because the contributions of capacitors and inductors differ in phase from resistive components by 90 degrees, a process like vector addition is used to develop expressions for impedance. More general is the complex impedance method.
 
   Stereo Speaker / Receiver (Model No : SSR-2713A)
- Realization of unification two micro speakers on single unit for stereo system
- Realization of 32~64 poly and high quality midi file playback including surround effect.
- Benefit to use side-wide area and slim width.
- Patent pending in Korea and Japan.
 
   Surround Effect Test (Close-State)
 
   Loading Concept (B)
- Maximize cavity volume - Minimize case thickness
- Locate sound hole on the center - Maximize hole size
 
   1-Way 2-Mode Speaker / Receiver (Model No : OS-1813A)
- Loading Concept
 
 
   Emmission Hole Design
- Speaker - Receiver
- Maximize hole area of center direction
- Induce efficient sound by hole shape match
 
 
  - Do not push with any force at metal cover(protector)
  - Do not use any solvent material or adhesive material of solvent cintents for speaker & receiver assembly