SEAS |
RM 120 |
RM 120-4 |
L0021-04S |
Cone driver |
Sold by piece |
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Brand SEAS |
Model RM 120 |
TLHP code RM 120-4 |
Manufacturer code L0021-04S |
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Product type Cone driver |
Sales packaging Sold by Piece |
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If you want to purchase more than the quantity in stock, have a look at the supply time below :
Indicative average supply lead time: 5 weeks
Heavy copper rings mounted above and below the T-shaped pole piece reduce non linear
and modulation distortion and increase overload margin.
The large magnet system provides good sensitivity and transient response.
The chrome plated brass phase plug reduces compression due to temperature variations in the voice coil, increases long term power handling capacity and eliminates resonances in the cavity inside the voice coil former.
The extremely stiff and stable injection moulded zinc basket keeps the critical components in perfect alignment. Large windows in the basket both above and below the spider reduce sound refl exion, air fl ow noise and cavity resonance to a minimum.
Gold plated terminals mounted on a glass fi bre reinforced plate reduce contact resistance and improve reliability.
General |
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Product type | Cone driver |
Brand | SEAS |
Reference | RM 120 |
Product code | L0021-04S |
Informations |
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Product manufacturer range | 12 cm, Lotus, Midrange |
Nominal impedance | 4 ohm |
Dimensional category | 4.5 inch |
Frequency coverage type | Fullrange |
Manufacturer sensitivity | 90.5 dB |
Calculated sensitivity | 87.57 dB |
Nominal power handling | 110 W |
Max power handling | 400 W |
Bandwidth | 300÷5000 Hz |
Fundamental parameters |
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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 T.m |
Small signal parameters |
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Fs | 72 Hz |
Qes | 0.4 |
Qms | 2.95 |
Qts | 0.35 |
Vas | 4 L |
Datas |
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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 |
Dimensions |
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Voice coil diameter | 1.02 inch |
Winding depth | 9.4 mm |
Gap height | 6 mm |
Outside diameter | 120.4 mm |
Baffle cutout diameter | 100 mm |
Depth | 71.5 mm |
Front thickness | 5 mm |
Depth after front | 66.5 mm |
Diamètre aimant (mm) | 99 mm |
Shape & Materials |
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Front chape | Cylindrical |
Basket masterial | Acier |
Surround shape | One roll |
Surround material | Rubber |
Cone material | Paper |
This system is only available for technical questions. For questions of prices, availability of products and deadline thank you to send your request by the contact page.
* The frequency responses above show measured free field sound pressure in 0
This product is under manufacturer's warranty. This warranty protect you for the manufacturing defaults. The warranty does not protect for abnormal use of the product.