2PCS Replacement drivers speakers 40mm 32ohm 132dB for Marshall major2 major4 AKG K420 K430 K450 K55 Sony MDR-CD280 headphones

Permanent-magnet dynamic loudspeaker

2PCS Replacement drivers speakers 40mm 32ohm 132dB for
Marshall major2 major4 Razer kraken 7.1 Skeleton Hesh 2.0 3.0
AKG K420 K430 K450 K55 - Sony MDR-CD280 headphones

Type：Cone Permanent-magnet dynamic loud speaker.

Dimensions：40mm  1.5inch

Input：Nominal input 20mW .Max imum input 30mW.

Nominal Impedance：32Ω±15%At1000Hztest

Lowest Resonance Frequency：87Hz±20 %At(0.8V)

Output Sound Pressure Level：132±3dB(At1000Hz 0.8V 20mW Sound Check test )

Effective Frequency Band：F0～5KHz-10dB

Distortion：5 % lessthan 20mW,1000Hz morethan BuzzRattleetc.Must be normal at sine wave  0.8 V,25～6 K Hz,/uf．

Polarity：When a positive current is supplied from the speaker the terminal marked (＋) , and a negative to the other terminal the diaphragm must move toward the front．

LoadTest：Must be normal after load test：white noise 20mW  96 hours.

HeatTest：Must be normal after 60±2℃and relative humidity 20～25% 48hours and then room temperature 1 hour.

ColdTest：Must be normal after–20±3℃and relative humidity～% 48hours and then room temperature 1 hour.

HumidityTest：Must be normal after 50±2℃and relative humidity 90～95 % 48hours and then room temperature 1 hour.