ToyX project EQ Linearizer study ....Battery Power

EQ Linearizer 電源是大問題,喇叭效率超過95dB時,100hz以下AC 60hz容易peak進去,over 4khz以上又容易有高頻訊噪,高音會ㄘㄘ聲,解了下面100hz訊噪,over 4k 訊噪不好解 ,所以用電池.





The Battery box usage 4 cells (2S2P) Li-ion output 8.2V/5.2A (peak current limited in 5A).
No fuse and auto Over current ,Low Voltage,Over Temperture protection.




The EQ Linearizer remote power circuit clamp chock to reduce EMI influence.
L Channel and R Channel power path add diode to separate cross influence.




The battery module could stand alone into charge mode . So no AC noise.

The battery cells will  separate to open and charging by single cell  charger therefor no unbalance issue.

Toy12 Plasma tweeter Diy-8

 211 Amp. take off old output transformer  and prepare assemble new output transformer .


Put two output transformer together.
Left side is Look-T OTP and Right side is Lite OTP from China.


Look-T transformer thickness is more large.


Find a suitable box and hand make an home give for  transformer.
This for Hi-pass across over (over 7Khz) change impedance to fit Plasma tweeter input.


Replace output transformer and verify function is ok.
Look-T 211 Opt 跟原先比起來清楚的多, 原先的 Otp 稍矇的分不是很清楚前中後的音像及細節.
低頻有下去些 較大差異是之前用Analog EQ.增加50hz,250hz的Gain,但是211會有些悶悶的打不出聲音,
現在完全沒這現象,像我300B的低頻聲音線條了.


Finish whole shielding net and verify Plasma tweeter radiation in working normal (about 650V@140mA).
The current will be about 150mA when audio signal modulation in.


Other angle picture.


Connect plasma tweeter of L,R channel and estimate real sound color.



Switching  A,B test sound color and verify different  between RP-302 and Plasma tweeter.