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C7-650cw: Specifications and Crossover Setting Guidelines
C7650cw SPECIFICATIONS
Speaker Type: Component Woofer
Nominal Diameter: 6.5 in. (165 mm)
Nominal Impedance (Znom): 4 ohms
Continuous Power Handling: 125W
Recommended Amplifier Power: 50-175W (RMS)
Net Weight: 3.28 lbs. (1.49 kg)
Driver Rear Displacement: 0.0135 cu.ft. (0.382 liters)
Min. Recommended Sealed Enclosure:
0.424 cu.ft. (12 liters)
Parameters:
Voice Coil Resistance (Re): 3.114 ohms
Free Air Resonance (Fs): 54.5 Hz
Reference Efficiency (no): 0.304%
Efficiency: 87.0 dB @ 1W/1m | 93.0 dB @ 1W/0.5m
Sensitivity: 90.0 dB @ 2.83V/1m
Electrical “Q” (Qes): 0.669
Mechanical “Q” (Qms): 6.265
Total Speaker “Q” (Qts): 0.605
Equivalent Compliance (Vas): 0.461 cu.ft. (13.05 liters)
Moving Mass (Mms): 17.679 g
Mechanical Compliance (Cms): 0.000482 m/N
Magnetic Strength (BL): 5.31 N/A
Effective Piston Area (Sd): 21.4 sq.in. (0.013807 sq. m)
One-Way Linear Excursion (Xmax): 5 mm
Design Bandwidth:
With 48 dB/octave filters: 50 Hz - 5 kHz
With 24 dB/octave filters: 60 Hz - 5 kHz
With 12 dB/octave filters: 70 Hz - 5 kHz
55
60
65
70
75
80
85
90
95
dB SPL
20 kHz10 kHz5 kHz1 kHz 2 kHz100 Hz50 Hz 200 Hz 500 Hz20 Hz
Sum
Tweeter
Woofer
55
60
65
70
75
80
85
90
95
dB SPL
20 kHz10 kHz5 kHz1 kHz 2 kHz100 Hz50 Hz 200 Hz 500 Hz20 Hz
Sum
Tweeter
MidrangeWoofer
C7 3-Way Speaker System
C7-650cw Woofer
Low-Pass: 24 dB/octave Linkwitz-Riley @ 400 Hz
Level Offset: 0 dB
C7-350cm Midrange
High-Pass: 24 dB/octave Linkwitz-Riley @ 480 Hz
Low-Pass: 24 dB/octave Linkwitz-Riley @ 3500 Hz
Level Offset: 0 dB
C7-100ct Tweeter
High-Pass: 24 dB/octave Linkwitz-Riley @ 4500 Hz
Level Offset: -1.0 dB
Please note: These are recommended starting points
for tuning. In-vehicle measurements should be made to
optimize the crossover for speaker placement and vehicle acoustics.
C7 2-Way Speaker System
C7-650cw Woofer
Low-Pass: 24 dB/octave Linkwitz-Riley @ 2700 Hz
Level Offset: 0 dB
C7-100ct Tweeter
High-Pass: 24 dB/octave Linkwitz-Riley @ 4000 Hz
Level Offset: -1.0 dB
Please note: These are recommended starting points
for tuning. In-vehicle measurements should be made to
optimize the crossover for speaker placement and vehicle acoustics.
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