(Page 01)
Construction of MT enclosures
using Scan Speak drivers
Design by : Jiri
Constructed by : Jiri
Scan Speak Mid/bass driver 18W/8531G00
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TYPICAL CHARACTERISTICS
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|
|
|
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Nominal
impedance |
Z |
W |
8 |
|
Sensitivity(2.83V/1m) |
- |
dB SPL |
87 |
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Usable freq. range |
- |
Hz |
- |
|
Power handling capacity 100h RMS (IEC17.1) |
- |
W |
60 |
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Max Sound Pressure Level |
SPLmax |
dB SPL |
- |
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Min. impedance modulus |
Zmin |
Hz |
6.4 |
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Voice-coil inductance |
Le |
mH |
0.35 |
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Voice-coil inductance @ 10kHz |
- |
- |
- |
|
BL product |
BL |
N/A |
- |
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Moving mass |
Mms |
kg |
0.175 |
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THIELE-SMALL PARAMETERS: TYPICAL (QC LIMITS) |
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|
|
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Resonance frequency |
Fs |
Hz |
28 |
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DC Resistance |
Re |
W |
5.8 |
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Mechanical quality factor |
Qms |
1 |
5.10 |
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Electrical quality factor |
Qes |
1 |
0,39 |
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Total quality factor |
Qts |
1 |
0,36 |
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Mechanical suspension compliance |
Cms |
mm/N |
1.85 |
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Effective piston area |
Sd |
cm2 |
150 |
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Equivalent Volume |
Vas |
l |
58.2 |
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Max linear excursion |
Xmax |
±mm |
11.0 |
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Linear displacement volume |
Vd |
|
|
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Half-space
efficiency |
h0 |
% |
|
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Unity load volume |
Vas.Qts2 |
10-3.m3 |
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ABSOLUTE MAXIMUM RATINGS |
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|
|
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Short term max. input voltage |
Vmax |
V |
|
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Max.excursion before damage |
Xdam |
±mm |
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Ambient operating temperature |
Ta |
°C |
|
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Storage temperature |
- |
°C |
|
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Environemental withstanding Q |
- |
- |
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APPLICATION INFORMATION |
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|
|
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Air volume occupied by the driver |
- |
|
|
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Speaker net mass |
|
kg |
1.7 |
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Recommended reflex box |
Vb/Fb |
Lts/Hz |
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Scan Speak Tweeter Driver R2904/700005
T S Parameters
Resonance frequency [fs] 520Hz
Mechanical Q factor [Qms] 2.90
Electrical Q factor [Qes] 0.38
Total Q factor [Qts] 0.33
Force factor [Bl] 2.8Tm
Mechanical resistance [Rms] 0.34kg/s
Moving mass [Mms] 0.3g
Suspension compliance [Cms] 0.31mm/N
Effective diaph. diameter [D] 27mm
Effective piston area [Sd] 5.6cm²
Equivalent volume [Vas] 0.01l
Sensitivity(2.83V/1m) 94.5dB
Ratio Bl/√Re 1.62N/√W
Ration fs/Qts 1566Hz
Electrical Data
Nominal impedance [Zn] 4K
Minimum impedance [Zmin] 3.7K
Maximum impedance [Zo] 26.2K
DC resistance [Re] 3K
Voice coil inductance [Le] 0.01mH
Power Handling
100h RMS noise test (IEC17.1)* 160W
Long $ term max power (IEC17.3)* $W
*Filter:2.order HPButterworth,2.5kHz
Voice Coil and Magnet Data
Voice coil diameter 26mm
Voice coil height 2.1mm
Voice coil layers 2
Height of gap 2.5mm
Linear excursion ±0.2mm
Max mech.excursion ±1.6mm
Unit weight 0.4kg
PROJECT MT
Enclosure sealed volume 20l no bracing
Enclosure material MDF 32+32mm 64mm
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