Integrated in the Competition line, these speakers have been developed from some of the most demanded models all over the planet by the Car Audio market in Beyma's professional line.
Beyma presents a total of 4 new loudspeaker models, among them it's worth paying particular attention to PRO8MI. This loudspeaker has diameter of 8" and is capable of handling very high power: 200 W rms. Thanks to the special design, optimized to reproduce the midrange frequency, the loudspeaker offers high sensitivity in all models that are around 100 dB.
It's important to emphasize that although this loudspeaker seems physically intended for woofer or subwoofer; this speaker is not designed to reproduce that frequency range. Meaning we could break it quite easily if we intend to give it such use.
On the contrary, if we use it to reproduce the frequencies for which it is designed, this speaker can generate very high levels with great high quality playback. But always as part of a system in which there also woofers and/or subwoofers to complement it and reproduce the lower frequencies where the midrange loudspeakers
The cutoff frequency recommended for these speakers not only have to take into account the frequency range, but also the impedance curve of each one of them. Based on these data the recommended cuts would be the following:
Minimum lower cutoff frequency (High Pass): 200Hz
Maximum upper cutoff frequency (Low Pass): 4-5 kHz
Higher cutoff frequencies allow greater tolerance, but it is very important to respect the lower ones too. Also, the filtering should have a minimum slope of 12dB per octave (second order filter).
Product Features
Beyma pro 8MI is a high power 8" car midrange speaker from the beyma competition series
Handles 200 watts AES & 400 watts program power
Designed for medium frequencies reproduction
Features a large 2" voice coil & a high 98db SPL
Delivers clear & detailed midrange of high quality
Available in 4 ohms only
Specifications
Nominal diameter: 200 mm. / 8 in.
Nominal impedance: 4 ohms
Power handling / maximum: 200 W RMS / 400 W
Sensitivity: 98 dB 1w @ 1m
Frequency range: 150 - 7000 Hz
Voice coil diameter: 51.7 mm. / 2 in.
Bl factor: 7.6 N / A
Moving mass: 0.018 Kg.
Thiele-Small Parameters
Resonant frequency, fs: 86 Hz
D.C. voice coil resistance, Re: 3.4 ohms.
Mechanical quality factor, Qms: 10.40
Electrical quality factor, Qes: 0.56
Total quality factor, Qts: 0.53
Equivalent air volume to Cms, Vas: 14 l
Efficiency, Oo (%): 1.5
Effective surface area, Sd: 220 cm2
Voice coil inductance, Le @ 1kHz: 0.3 mH