Technical documentation - Solen

U H 2 0 5 P W 1
Mid / Bass Driver
The goal of every Motus driver design is linear frequency
response, low distortion and superb tonality.
After hundreds of hours of refinement each driver allows for
the application of a minimal crossover to achieve your desired
target response.
Every Motus driver goes through a rigorous four stage quality
control process to ensure that the driver in your loudspeaker
represents the best Motus has to offer.
The UH205PW1 is a state of the art underhung mid bass
driver. It is equally at home as the woofer in a three way
design or the mid bass in a two-way speaker.
• Underhung voice coil
• Linear frequency response
• Ultra low distortion
• Precision machined undercut pole piece
• Aerodynamic basket design
• Acoustically transparent spider
6.00
• FEA Optimized motor
• Pressed paper cone
• Vented voice coil
• Symmetrical lead wire placement
130.00
• Vented pole piece
• Gold plated terminals
• Dual shorting rings
• Die cast aluminum basket
145.00
191.00
225.50
UH205PW1 - Parameters
Thiele / Small Parameters
Resonance Frequency
Mechanical Q
Electrical Q
Total Q Factor
Force Factor
Moving Mass
Suspension Compliance
Radiating Diameter
Radiating Area
Equivalent Volume
Sensitivity (1W / 1M)
Sensitivity (2.83V / 1M)
FS
QMS
QES
QTS
BL
MMS
CMS
Dia.
SD
VAS
SPL
SPL
26.47Hz
8.54
.39
.38
8.74 Tm
36.55 grams
989 mm/N
164.00 mm
211.24 sq. cm
62.68 liters
86.45 dB
88.54 dB
Electrical Parameters
DC Resistance
Nominal Impedance
Voice Coil Inductance
Power Handling
Long Term Power Handling*
Short Term Power Handling*
Enclosure Volume**
Sealed - Q.707
Vented - QB3
DCR
NOM
LE
24.90 L (.88 cu ft)
46.73 L (1.65 cu ft)
4.94 ohms
6.00 ohms
.39 mH
125 watts
200 watts
49.66 Hz -3dB
29.16 Hz -3dB
Magnet and Voice Coil
Voice Coil Diameter
Voice Coil Winding Height
Voice Coil Layers
Gap Height
Linear Excursion
Max Mechanical Excursion
Dimensions and Weight
Total Unit Weight
Total Outside Diameter
Total Depth
60.40 mm
8.50 mm
4
25.00 mm
+ 8.00 mm
+ 25.20 mm
5.89 kg
225.50 mm
130.00 mm
*IEC 268-5
**Estimated volume, no added resistance
Thiele / Small parameters measured after 24 hours break in
All specifications are subject to change without notice
M O T U S • 3 3 8 0 L A S I E R R A A V E N U E S U I T E 1 0 4 - 1 2 1 • R I V E R S I D E C A 9 2 5 0 3 - 5 2 2 5 U S A
w w w . m o t u s a u d i o . c o m
07.12

U H 2 0 5 P W 1
Mid / Bass Driver
Frequency Response (1/12 Octave Smoothing)
Magnitude (dBSPL)
100
90
80
70
60
50
100 1k 10k
Frequency (Hz)
Curve Description
Black Curve On Axis SPL
Green Curve 30 deg off axis
Blue Curve 60 deg off axis
Test Conditions
Level
2.83 volts
Mic Distance 1 meter
Smoothing 1/12 Octave
Boundary IEC Baffle
Harmonic Distortion (1/12 Octave Smoothing)
Magnitude (dB)
0
-10
-20
-30
-40
-50
-60
-70
100 1k 10k
Frequency (Hz)
Curve Description
Black Curve On Axis
Solid Curve 2 nd Harmonic
Dash Curve 3 rd Harmonic
Test Conditions
Level
2.83 volts
Mic Distance 1 meter
Smoothing 1/12 Octave
Boundary IEC Baffle
Impedance
90
80
70
Curve Description
Black Curve
Impedance
Resistance (Ohms)
60
50
40
30
20
10
Test Conditions
Boundary
Free Air
100 1k 10k
Frequency (Hz)
M O T U S • 3 3 8 0 L A S I E R R A A V E N U E S U I T E 1 0 4 - 1 2 1 • R I V E R S I D E C A 9 2 5 0 3 - 5 2 2 5 U S A
w w w . m o t u s a u d i o . c o m
07.12