Mini-Onken F120A is a speaker that employs a Fostex F120A fullrange driver.
Mini-Onken F120A has been developed by Bernd Timmermanns and David Dlugos.
The speaker is built in onken bassreflex technology.
The crossover consists of two RCL circuit in series and a RCL circuit in parallel to the fullrange driver. These are smoothing the frequency response and compensating the baffle step.
Between 50 Hz and 20 kHz, the frequency response of this loudspeaker is nearly linear on axis. The decay spectrum is without big faults. At medium volume, i.e. 90 dB at 1 m, the nonlinear distortions are mostly below 1% above 150 Hz.
the crossover components (right),
to be mounted on a small wooden board.
Kit without cabinet, price per speaker - not available
The high-end kit contains Clarity-Cap CMR 630 V and CSA 250 V capacitors. The coils are CFC copper foil coils and baked varnish coils for diminishing the microphonics effect. Current flowing through the coil creates a magnetic field which on itself sets the reel of wire in motion. That motion induces a voltage in the coil which adds itself to the original signal.
Kit with high-end-crossover without cabinet, price per speaker - not available
If you want to use a valve amplifier with this speaker an impedance correction should be employed. In this case the component quality is less important. Therefore, we offer only one kit. Upon request, higher quality components are available.
If you prefer to mount the crossover components on a 240 x 165 mm universal PCB instead on wood:
Universal PCB RA240, order no.. str-RA240, price per unit: EUR 8,60 excl. VAT: € 7.23 / $ 8.53
We recommend one board per kit (two boards for a speaker pair)
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