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Miniature Rectangular Loudspeaker 40 x 20mm
(Top | 40x28mm | 57x23mm | Round 28mm | Round 30mm | Round 36mm | Round 45mm | BF45 | Round 50mm | Miniature Loudspeaker Round 64mm | Mtroniks 80mm)
A miniature low profile rectangular loudspeaker with high power handling capacity, available in 4Ω and 8Ω versions. Most sound cards specify use of a 8Ω speaker, lower impedance could cause the audio amplifier to overheat and shut down; best to use 2 of the 4Ω speakers wired in series. Connections are via solder pads on the rear of the speaker (see More Images tab).
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Power (Nominal) | 2.0 W |
Power (Maximum) | 3.0 W |
Impedance | 4Ω or 8Ω ± 15% ohms |
Resonant Frequency | 400 ± 20% Hz |
Sound pressure level | (1W, 0.5M Average at 0.8,1.0,1.2,1.5KHz) 83 ± 3dB |
Frequency range | 200Hz ~ 20KHz |
Housing Material | Metal |
Magnet Size | 11 x 1.5mm |
Magnet Material | Nd-Fe-B |
Operating Temperature | -20°C ~ +60°C |
Storage Temperature | -30°C ~ +70°C |
Weight | 7.6g ± 5% |
40x20 Speaker Drawing
40x20 Speaker, Front face
40x20 Speaker, Rear face showing solder pads
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Miniature Rectangular Loudspeaker 40 x 28mm 4 ohm
(Top | 40x20mm | 57x23mm | Round 28mm | Round 30mm | Round 36mm | Round 45mm | BF45 | Round 50mm | Miniature Loudspeaker Round 64mm | Mtroniks 80mm)
A miniature 4Ω, 4W max, loudspeaker. Most sound modules specify use of a 8Ω speaker, a lower impedance speaker used at high volume could cause the audio amplifier to overheat and shut down. Using this 4Ω speaker should be OK at low volume and with plenty of air circulation around the sound module; if in doubt, use 2 of these wired in series. Connections are via solder tags on the rear of the speaker (see More Images tab).
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Power Nominal | 2.0 W |
Power Maximum | 4.0 W |
Impedance | 4 ± 15% Ohms |
Resonant Frequency | 380 ± 20 %Hz |
Sound Pressure Level | (Average at 1W, 1M - 0.8,1.0,1.2,1.5KHz) 84 ± 3dB |
Frequency Range | 0-20,000 KHz |
Cone Material | Black Cloth Edge and Paper Cone |
Housing Materials | ABS (Black) |
Operating Temperature | -20 ~ +60°C |
Storage Temperature | -30 ~ +70°C |
Weight | 12g ± 5% |
40x28 Speaker Drawing
40x28 Speaker, Front face
40x28 Speaker, Rear face showing solder pads
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Miniature Loudspeaker Rectangular 57.5 x 23mm
(Top | 40x20mm | 40x28mm | Round 28mm | Round 30mm | Round 36mm | Round 45mm | BF45 | Round 50mm | Miniature Loudspeaker Round 64mm | Mtroniks 80mm)
A miniature 8 ohm rectangular loudspeaker 2w max, with mounting lugs and 180mm lead.
The lead is terminated with a 2 pin Molex Picoblade plug.
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Rated impedance | 8Ω ±15% |
Nominal power | 1W |
Maximum power | 2W |
Resonant frequency | 700Hz ±20% |
Frequency range | 0Hz to 20kHz |
Sound output level | 93dB ±3dB |
Dimensions (excluding lugs) | 57.5 x 23 x 14.85mm |
Weight | 38g |
57x23 Speaker Drawing
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Miniature Loudspeaker 28mm Round 8 Ohm
(Top | 40x20mm | 40x28mm | 57x23mm | Round 30mm | Round 36mm | Round 45mm | BF45 | Round 50mm | Miniature Loudspeaker Round 64mm | Mtroniks 80mm)
A miniature low profile round loudspeaker with 2W power handling capacity.
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Miniature Loudspeaker 30mm Round 8 Ohm
(Top | 40x20mm | 40x28mm | 57x23mm | Round 28mm | Round 36mm | Round 45mm | BF45 | Round 50mm | Miniature Loudspeaker Round 64mm | Mtroniks 80mm)
A miniature low profile round loudspeaker with 2W power handling capacity, 5.5mm thick.
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Miniature Loudspeaker Round 36mm
(Top | 40x20mm | 40x28mm | 57x23mm | Round 28mm | Round 30mm | Round 45mm | BF45 | Round 50mm | Miniature Loudspeaker Round 64mm | Mtroniks 80mm)
A miniature waterproof 8 ohm round loudspeaker 1w nominal, 2w max. Its 6mm thickness makes it suitable for applications where slim construction is needed. Being weatherproof, it is particularly suited to outdoor use.
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Rated power | 1W |
Maximum power | 2W |
Nominal impedance | 8Ω |
Frequency response | –10dB 300-20000Hz |
Mean sound pressure level | 77dB |
Maximum cone displacement | 0.5mm |
Resonance frequency | 550Hz |
Voice coil diameter | 10mm |
Height of winding | 2mm |
Cutout diameter | 31mm |
Overall diameter | 36mm |
Net weight | 6g |
36mm dia Speaker Drawing
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Visaton FRWS 5 R (45mm)
(Top | 40x20mm | 40x28mm | 57x23mm | Round 28mm | Round 30mm | Round 36mm | BF45 | Round 50mm | Miniature Loudspeaker Round 64mm | Mtroniks 80mm)
A miniature 8 ohm round loudspeaker 4w nominal, 10w max.
This is an ideal size speaker for fitting into a 50mm internal diameter plastic tube as a baffle.
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Rated power | 4W |
Maximum power | 10W |
Nominal impedance | 8Ω |
Frequency response | –10dB 150-20000Hz |
Mean sound pressure level | 84dB |
Maximum cone displacement | 4mm |
Resonance frequency | 320Hz |
Voice coil diameter | 14mm |
Height of winding | 3mm |
Cutout diameter | 45mm |
Overall diameter | 50mm |
Net weight | 87g |
45mm dia Speaker Drawing
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Visaton BF 45
(Top | 40x20mm | 40x28mm | 57x23mm | Round 28mm | Round 30mm | Round 36mm | Round 45mm | Round 50mm | Miniature Loudspeaker Round 64mm | Mtroniks 80mm)
A miniature 8 ohm round loudspeaker 4w nominal, 8w max and with low resonant frequency.
This is an outstanding speaker with excellent low frequency reproduction, ideal for use with a MyLocoSound sound module.
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Rated power | 4W |
Maximum power | 8W |
Nominal impedance | 8Ω |
Frequency response | –10dB 90-20000Hz |
Mean sound pressure level | 79dB |
Resonance frequency | 158Hz |
Voice coil diameter | 17mm |
Height of winding | 4mm |
Cutout diameter | 45mm |
Overall diameter | 61mm |
Net weight | 32g |
BF45 Speaker Drawing
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Visaton 2901 K 50 (50mm)
(Top | 40x20mm | 40x28mm | 57x23mm | Round 28mm | Round 30mm | Round 36mm | Round 45mm | BF45 | Miniature Loudspeaker Round 64mm | Mtroniks 80mm)
A high quality 5cm round speaker particularly well suited to outdoor applications, 2w nominal, 3w max.
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Rated power | 2W |
Maximum power | 3W |
Nominal impedance | 8Ω |
Frequency response | –10dB 180-17000Hz |
Mean sound pressure level | 86dB |
Resonance frequency fs | 300Hz |
Voice coil diameter | 10mm |
Cutout diameter | 46mm |
Net weight | 48g |
Protective system | IP65 |
50mm dia Speaker Drawing
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Miniature Loudspeaker Round 64mm
(Top | 40x20mm | 40x28mm | 57x23mm | Round 28mm | Round 30mm | Round 36mm | Round 45mm | BF45 | Round 50mm | Mtroniks 80mm)
A small, low-profile 8 ohm round loudspeaker 4w nominal, 10w max.
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Mtroniks Waterproof Loudspeaker Round 80mm
(Top | 40x20mm | 40x28mm | 57x23mm | Round 28mm | Round 30mm | Round 36mm | Round 45mm | BF45 | Round 50mm | Miniature Loudspeaker Round 64mm)
A robust waterproof 8 ohm 12W speaker as used in the Mtroniks digiSound sound module sets. Fitted with 300mm wires and 2pin 2.54mm pitch plug.
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