Rauma is a two way floorstanding speaker of high quality.
Rauma is a bass-reflex cabinet loudspeaker with drivers of SEAS and Audaphon.
The kit is delivered with the following drivers:
- a Audaphon AMT 1i air motion transformer (ribbon-tweeter)
- two SEAS Excel W15CH001 woofers
The loudspeaker has been developed by Dennis Frank and Daniel Gattig.
The crossover consists of:
- a 2nd order high-pass filter (12 dB per octave slope) for the tweeter.
- a 2nd order low-pass filter (12 dB per octave slope) for the woofer.
The frequency response of this speaker is perfectly linear.
The decay spectrum is perfect.
At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are below 0.2% above 500 Hz and doesn't exceed 0.4% at 95 dB at 1 m between 300 and 15000 Hz.
the crossover components (right),
to be mounted on a small wooden board.
Kit without cabinet, price per speaker EUR 1027,00 excl. VAT: € 863.03 / $ 1001.11
The high-end kit is delivered with baked varnish air core coil and copper foil coil for minimizing microphonic effects. - The current flow through the coil creates a magnetic field which sets the reel of wire in motion. This motion induces a voltage in the coil which adds itself to the signal. The stiffer the reel of wire is, the less the signal will be altered. The capacitors for the drivers are of type polypropylen (MKP) Clarity-Cap ESA 630 V and PWA 160V.
Kit with high-end-crossover without cabinet, price per speaker EUR 1070,00 excl. VAT: € 899.16 / $ 1043.03
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 universal PCB instead on wood
PCB 150x115 mm, tin plated, price per unit: EUR 4,70 excl. VAT: € 3.95 / $ 4.58
We recommend one board per kit (2 boards per speaker pair)