Seas Lotus Reference RM120 - L0021-04S
5" (13cm) bass-midrange driver
/piece
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Description
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Use the Lotus Reference RM120 - L0021-04S from Seas, a special type of cone driver designed for in-car use. This 5" (13cm) bass-midrange driver stands out due to its large magnet system, which keeps important components perfectly aligned. Thanks to the hand-coated paper cone and the mechanically adapted natural rubber surround, the result is a first-class, smooth midrange. Other technologies such as heavy copper rings and a chrome-plated brass phase plug reduce distortion and offer high power handling. In addition, the injection-moulded zinc basket guarantees outstanding stability and effective minimization of noise caused by sound reflections and air currents.
- Large magnet system, holds the critical components in perfect alignment
- The hand-coated paper cone and the mechanically adapted natural rubber surround ensure an unusually soft mid-range.
- Heavy copper rings above and below the T-shaped pole core reduce non-linear and modulation distortions and increase the overload reserve.
- The large magnet system offers good sensitivity and a good transient response.
- The chrome-plated brass phase plug reduces compression due to temperature fluctuations in the voice coil, increases the long-term load capacity and eliminates resonances in the cavity within the voice coil former.
- The extremely rigid and stable injection-molded zinc basket keeps the critical components in perfect alignment. Large windows in the basket both above and below the spider reduce sound reflections, airflow noise and cavity resonance to a minimum.
- Gold-plated connections on a fiberglass-reinforced plate reduce contact resistance and improve reliability.
Technical data
- Nominal impedance 4 Ohm
- Dimension category 4.5 inch
- Frequency range type full range
- Manufacturer sensitivity 90.5 dB
- Calculated sensitivity 87.57 dB
- Nominal load capacity 110 W
- Maximum load capacity 400 W
- Bandwidth 300÷5000 Hz
- Sd 50 cm²
- Mms 4.55 gr
- Cms 1100 µm/N
- Rms 0.73 kg/s
- Le 0.25 mH
- Re 3 Ohm
- BL 4 Tm
- Fs 72 Hz
- Qes 0.4
- Qms 2.95
- Qts 0.35
- Vas 4 L
- Flux density 1.1 T
- Xmax ±1.7 mm
- Calculated Xmax ±3.7 mm
- EBP 180 Hz
- Fs / Qts 206 Hz
- Vas * Qts² 0.49 L
- Calculated efficiency 0.36 %
- Weight ~1.3 kg
- Voice coil diameter 1.02 inch
- Winding depth 9.4 mm
- Gap height 6 mm
- Outer diameter 120.4 mm
- Diameter of the baffle cut-out 100 mm
- Depth 71.5 mm
- Thickness of the front 5 mm
- Depth after the front 66.5 mm
- Outer diameter (mm) 99 mm
- Cone material paper
Download data sheet
