Toy9 3 way speaker JBL 2405H/Altec 288C/Utha15'' Alnico5

Tweeter JBL2405H


Mid range Altec 288C driver


Mid range Altec 288c driver & horn and spreader


Woofer 15'' Utha Alnico 5


Tweeter & Mid range crossover


Woofer crossover


Woofer crossover & connect wire


Final 3 way speaker right system


Final 3 way speaker left system
System sensitivity 100db

crossover frequency 400Hz/7kHz

Toy6 Full range speaker diy

Full range speaker front view.
Speaker mount on a rack and the rack make by Laser cutting.


Full range compress chamber build by basin and pot inside.


Corner view and wire connect.


Rear view.


Front view.


Sounds not good.

Finally I put my Amp. on it and this speaker become sound traper too.

Toy5 Take Marantz 7 and 和田茂氏 pre-amp case to build D/A

Because when I finish D/A and I connect D/A behind Marantz 7 and 和田茂氏 pre-amp then the pre-amp will decay audio signal so I know pre-amp not Hi-Fi enough.

Toy3 D/A coplue capacitor of Balance output estimate

unknow PP capacitor


Bennic PP capacitor

final use ERO PP capacitor

Toy 2 D/A Power define and verify

D/A Power plan defien and verify.   

Toy 4 D/A with 6Dj8 buffer

High voltage Tube 6Z4

through R-C-L-C to 230V

Change 6DJ8 to E88CC

D/A module CS8416+WM8740 fix volume to buffer.

Volume control 

Toy 7 3-way speaker

High pass filter

Mid band pass filter



Low pass filter



Front View

Front view
Scan D2905/9900+Vifa D75mx-41-08+Sacn 25W8565-01 10''

Freqquency 2k~30k/500~2k/19~500 hz 89dB