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Products' list and Features
JPY 60,000/pair
The main specification
  • Maximum rating; 35V
  • Impedance; 8ohms
  • Reproduction frequency band region;
    18kHz-150kHz or more
  • The maximum output sound efficiency;
    Five stage switch
  • Mass; About 300 grams
  • Size;125mm(width)90mm(height)
    100mm(depth terminals are contained)
  • Drive system;
    polymer piezo-electric Heil type
1. Sound wave radiation board
3. Black speaker terminal(minus).
4. Red speaker terminal(plus).
5. rotary switch1

The explanation of the
rotary switch
t is revokable at five stages. The SPL efficiency of the speaker

OFF ; 50dB
1 ;  70dB
2 ; 80dB
3 ;  90dB
4 ; 100dB
The protection circuit operates over 100V (However, the test signal by 20kHz
or more shoud be under 20V). It return to the origin when you turns off power)
It has been understood to have the reproduction ability of 150kHz or more that is the measurement limit of
the microphone from the measurement with research laboratories of the university.

Note3; Connection method
Please connect the speaker terminal of BATPRO2 with the speaker terminal of the main speaker in parallel.
It is good even if you connect it directly with the speaker output terminal of the amplifier.
There seems unusually to be a speaker that is a reverse-aspect, too.
In that case, please connect the +terminal and -terminal in oppositely.
Please connect it with high pitch(tweeter) side at the Bi connection.