Tweeter Woofer

SEAS Lotus

The moving coil loudspeaker is by far the dominant electroacoustic transducer. SEAS design and produce from high end quality parts, using complicated procedures and incorporating a highly skilled workforce to satisfy even the most critical listeners.

To our building proposals with SEAS Lotus drivers.

Tweeter

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SEAS Lotus RT27F

order no. seas-L0004-06S

EUR 278,90 excl. VAT: € 234.37 / $ 253.12

26 mm dome tweeter with fabric domet.

power handling (continuous/programme) = 80/180 W
frequency range = 2500-30000 Hz
resonance frequency fs = 800 Hz
impedance R = 6 Ohm
sound pressure level SPL = 90 dB (2,83V; 1m)
DC resistance Re = 4,9 Ohm
force factor BL = 1,9 N/A
voice coil inductance L = 0,05 mH
effective piston radiating area Sd = 7,5 cm²
effective mechanical mass incl. air load mms = 0,26 g
voice coil diameter = 26 mm
maximum peak linear excursion vibration x_lin = +/- 0,25 mm
mounting diameter d = 46 mm
overall diameter d = 53 mm
mounting depth (not countersunk) t = 27 mm

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SEAS Lotus PT27F

order no. seas-L0005-06S

EUR 97,45 excl. VAT: € 81.89 / $ 88.44

26 mm dome tweeter with fabric domet.

power handling (continuous/programme) = 80/180 W
frequency range = 2500-30000 Hz
resonance frequency fs = 1000 Hz
impedance R = 6 Ohm
sound pressure level SPL = 89,5 dB (2,83V; 1m)
DC resistance Re = 4,9 Ohm
force factor BL = 1,9 N/A
voice coil inductance L = 0,05 mH
effective piston radiating area Sd = 7,5 cm²
effective mechanical mass incl. air load mms = 0,23 g
voice coil diameter = 26 mm
maximum peak linear excursion vibration x_lin = +/- 0,25 mm
mounting diameter d = 46 mm
overall diameter d = 53 mm
mounting depth (not countersunk) t = 21,5 mm

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Woofer

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recommended cabinet 1:
closed cabinet with 0,9 L volume
from 156/99 Hz (-3dB/-8dB)

recommended cabinet 2:
3,2 L volume bass reflex cabinet
with HP35 reflex tube, 11 cm long.
from 80/63 Hz (-3dB/-8dB).

SEAS Lotus RM120 (L0021)

order no. seas-L0021-04S

EUR 242,00 excl. VAT: € 203.36 / $ 219.63

11 cm midrange driver with paper cone.

power handling (continuous/programme) = 110/400 W
frequency range = 300-5000 Hz
resonance frequency fs = 72 Hz
impedance R = 4 Ohm
sound pressure level SPL = 90,5 dB (2,83V; 1m)
DC resistance Re = 3 Ohm
force factor BL = 4 N/A
voice coil inductance L = 0,25 mH
effective piston radiating area Sd = 50 cm²
effective mechanical mass incl. air load mms = 4,55 g
equivalent volume of compliance Vas = 4 l
total Q factor Qts = 0,35 (Qms=2,95, Qes=0,4)
voice coil diameter = 26 mm
maximum peak linear excursion vibration x_lin = +/- 1,7 mm
mounting diameter d = 99 mm
overall diameter d = 120 mm
mounting depth (not countersunk) t = 66,5 mm

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SEAS Lotus RW165/1 (L0017)

order no. seas-L0017-04S

EUR 322,50 excl. VAT: € 271.01 / $ 292.69

15 cm bass-midrange driver with magnesium cone.

power handling (continuous/programme) = 100/250 W
frequency range = 50-3000 Hz
resonance frequency fs = 64 Hz
impedance R = 4 Ohm
sound pressure level SPL = 88,5 dB (2,83V; 1m)
DC resistance Re = 3,2 Ohm
force factor BL = 6 N/A
voice coil inductance L = 0,45 mH
effective piston radiating area Sd = 126 cm²
effective mechanical mass incl. air load mms = 19 g
equivalent volume of compliance Vas = 7 l
total Q factor Qts = 0,61 (Qms=4,24, Qes=0,71)
voice coil diameter = 39 mm
maximum peak linear excursion vibration x_lin = +/- 4 mm
mounting diameter d = 145,3 mm
overall diameter d = 165 mm
mounting depth (not countersunk) t = 76 mm

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SEAS Lotus PW165/1 (L0018)

order no. seas-L0018-04S

EUR 189,40 excl. VAT: € 159.16 / $ 171.89

15 cm bass-midrange driver with glass fibre cone.

power handling (continuous/programme) = 100/250 W
frequency range = 50-3000 Hz
resonance frequency fs = 64 Hz
impedance R = 4 Ohm
sound pressure level SPL = 90 dB (2,83V; 1m)
DC resistance Re = 3,3 Ohm
force factor BL = 6 N/A
voice coil inductance L = 0,78 mH
effective piston radiating area Sd = 126 cm²
effective mechanical mass incl. air load mms = 16,9 g
equivalent volume of compliance Vas = 8 l
total Q factor Qts = 0,58 (Qms=5,49, Qes=0,65)
voice coil diameter = 39 mm
maximum peak linear excursion vibration x_lin = +/- 3 mm
mounting diameter d = 145,3 mm
overall diameter d = 165 mm
mounting depth (not countersunk) t = 76 mm

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recommended cabinet 1:
closed cabinet with 15 L volume
from 63/40 Hz (-3dB/-8dB)

recommended cabinet 2:
54 L volume bass reflex cabinet
with HP100 reflex tube, 34 cm long.
from 32/25 Hz (-3dB/-8dB).

SEAS Lotus RW220 (L0022)

order no. seas-L0022-04S

EUR 310,00 excl. VAT: € 260.50 / $ 281.34

20 cm bass driver with aluminium cone.

power handling (continuous/programme) = 110/300 W
frequency range = 30-2000 Hz
resonance frequency fs = 29 Hz
impedance R = 4 Ohm
sound pressure level SPL = 91 dB (2,83V; 1m)
DC resistance Re = 3,2 Ohm
force factor BL = 6,4 N/A
voice coil inductance L = 0,38 mH
effective piston radiating area Sd = 220 cm²
effective mechanical mass incl. air load mms = 28,2 g
equivalent volume of compliance Vas = 68 l
total Q factor Qts = 0,36 (Qms=2,11, Qes=0,43)
voice coil diameter = 39 mm
maximum peak linear excursion vibration x_lin = +/- 5 mm
mounting diameter d = 186,4 mm
overall diameter d = 220,6 mm
mounting depth (not countersunk) t = 93 mm

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Tweeter Woofer

The cabinet volume calculations are executed considering an external resistance of 0.3 Ohm. We are using, if no other data is known or available, the information supplied by the manufacturer.

Please note: the frequency response doesn't say much about the cut-off frequency inside the cabinet! Therefore, we mostly give you 2 examples with dimensioning considerations and an indication, how low the loudspeaker will reproduce.