UH 2 0 5 PW 1 Mid / Bass Driver
UH205PW1
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
• Precision machined undercut pole piece
• Linear frequency response
• Aerodynamic basket design
• Ultra low distortion
• Acoustically transparent spider
• FEA Optimized motor
• Vented voice coil
• Pressed paper cone
• Symmetrical lead wire placement
• Vented pole piece
• Gold plated terminals
• Dual shorting rings
• Die cast aluminum basket
130.00
6.00
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
DCR
NOM
LE
4.94 ohms
6.00 ohms
.39 mH
Power Handling
Long Term Power Handling*
Short Term Power Handling*
125 watts
200 watts
Enclosure Volume**
Sealed - Q.707 24.90 L (.88 cu ft)
Vented - QB3 46.73 L (1.65 cu ft)
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
60.40 mm
8.50 mm
4
25.00 mm
+ 8.00 mm
+ 25.20 mm
Dimensions and Weight
Total Unit Weight
Total Outside Diameter
Total Depth
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
MOTUS AUDIO • 6915 MULBERRY STREET • CINCINNATI OH 45239-4420 USA
www.motusaudio.com
08.15
UH205PW1
Mid / Bass Driver
Frequency Response (1/12 Octave Smoothing)
100
Curve Description
Black Curve
Green Curve
Blue Curve
Magnitude (dBSPL)
90
80
On Axis SPL
30 deg off axis
60 deg off axis
70
Test Conditions
60
Level
Mic Distance
Smoothing
Boundary
50
100
1k
2.83 volts
1 meter
1/12 Octave
IEC Baffle
10k
Frequency (Hz)
Harmonic Distortion (1/12 Octave Smoothing)
Curve Description
0
Black Curve
Solid Curve
Dash Curve
-10
Magnitude (dB)
-20
On Axis
2nd Harmonic
3rd Harmonic
-30
-40
Test Conditions
-50
Level
Mic Distance
Smoothing
Boundary
-60
-70
100
1k
2.83 volts
1 meter
1/12 Octave
IEC Baffle
10k
Frequency (Hz)
Impedance
Curve Description
90
80
Black Curve
Impedance
Resistance (Ohms)
70
60
50
40
30
Test Conditions
20
Boundary
Free Air
10
100
1k
10k
Frequency (Hz)
MOTUS AUDIO • 6915 MULBERRY STREET • CINCINNATI OH 45239-4420 USA
www.motusaudio.com
08.15
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