Kenwood KS-303HT Service Manual

POWER SUBWOOFER
KS-303HT/SW-22HT/25HT
SERVICE MANUAL
REVISED
© 2001-4/B51-5710-00 (K/K) 1362
AC power cord
(E30-5857-08)
Fuse holder
(J13-0212-08)
AC power cord bushing
(J42-0243-08)
LED
(B30-1832-08)
Grille ass'y
(B06-1481-08)
RCA jack x2
(E63-0213-08)
Control rotary
(R31-0418-08)
Slide switch
(S62-0213-08)
Control rotary
(R31-0419-08)
70%
SPECIFICATIONS
Subwoofer(SW-22HT/SW-25HT)
System Subwoofer system with built-in amplifier
Audio
Output Power
50 Watts RMS, at 4Ω from 40 Hz to 160 Hz with no
more than 0.09% total harmonic distortion
section
Input Sensitivity/Impedance
100 mV/43 kΩ, 200 mV/43 kΩ (MONO)
RCA-type pin-plug jack (LINE IN):
Push-type terminals:
1.8V/1.2 kΩ
Turn Over Frequency
80 Hz ~ 160 Hz
Phase Switching
NORMAL, REVERSE
Enclosure
Bass-Reflex
Speaker
Loudspeaker
200 mm (8") Cone type
section
Nominal Impedance
4 Ω
Frequency Response
40 Hz ~ 250 Hz
Power Consumption
110 W
Supply Voltage
AC120 V, 60 Hz
Dimensions Width:
286 mm (11-1/4")
General
Height:
368 mm (14-1/2")
Depth:
356 mm (14")
Net Weight
11.2 kg (24.7 Ib)
Enclosure Finish
High density particle board Iaminated with simulated
wood grain vinyl.
Front speaker, Center speaker, Rear speaker
Front speaker Center speaker Rear speaker
system 2 way 2 way 1 way
(Magnetically shielded) (Magnetically shielded)
Enclosure Acoustic Air Suspension Acoustic Air Suspension Acoustic Air Suspension
Loudspeaker 100 mm(4") Cone type
(Full Range type)
Woofer: 100 mm(4") Cone type 100 mm(4") Cone type –
Tweeter: 50 mm(2") Cone type 50 mm(2") Cone type –
Nominal Impedance 8 Ω 8 Ω 8 Ω
Peak Input Power – 80W 80W
Maximum Input Power 80W 40W 40W
Sensitivity 88dB/Wat 1m 88dB/Wat 1m 85dB/Wat 1m
Frequency Response 100Hz ~ 20,000 Hz 100Hz ~ 20,000 Hz 100Hz ~ 20,000 Hz
Crossover Frequency 3,000 Hz 3,000 Hz –
Dimensions Width:
129mm(5-1/16") 129mm(5-1/16") 129mm(5-1/16")
Height: 198mm(7-13/16") 198mm(7-13/16") 198mm(7-13/16")
Depth: 120mm(4-3/4") 120mm(4-3/4") 120mm(4-3/4")
Net Weight 1.2kg(2.6Ib)/piece 1.0kg(2.2Ib) 0.8kg(1.8Ib)/Piece
NOTE: THE GRILLES ON ALL SPEAKERS CANNOT BE REMOVED.
Notes:
1. Kenwood follows a policy of continuous advancements in development. For this reason, specifications may be changed without notice.
2. Full performance may not be exhibited in extremely cold locations (below 0 deg. C).
Switch push
(S68-0206-08)
Speaker jack
(E70-0204-08)
Switch rocker
(S66-0204-08)
KS-303HT is bundled up satellite speaker. SW-22HT and
SW-25HT are Subwoofer only.

Kenwood KS-303HT Specifications

Speaker Specifications

front_speaker_system	2 way
center_speaker_system	2 way
rear_speaker_system	1 way
front_speaker_woofer	100 mm (4") Cone type
center_speaker_woofer	100 mm (4") Cone type
front_speaker_tweeter	50 mm (2") Cone type
center_speaker_tweeter	50 mm (2") Cone type

Impedance and Power

front_speaker_nominal_impedance	8 O
center_speaker_nominal_impedance	8 O
rear_speaker_nominal_impedance	8 O
center_speaker_peak_input_power	80 W
rear_speaker_peak_input_power	80 W
front_speaker_maximum_input_power	80 W
center_speaker_maximum_input_power	40 W
rear_speaker_maximum_input_power	40 W

Sensitivity and Frequency

front_speaker_sensitivity	88 dB / W at 1 m
center_speaker_sensitivity	88 dB / W at 1 m
rear_speaker_sensitivity	85 dB / W at 1 m
front_speaker_frequency_response	100 Hz-20, 000 Hz
center_speaker_frequency_response	100 Hz-20, 000 Hz
rear_speaker_frequency_response	100 Hz-20, 000 Hz
front_speaker_crossover_frequency	3, 000 Hz
center_speaker_crossover_frequency	3, 000 Hz

Speaker Dimensions

front_speaker_width	129 mm (5-1/16")
center_speaker_width	129 mm (5-1/16")
rear_speaker_width	129 mm (5-1/16")
front_speaker_height	198 mm (7-13/16")
center_speaker_height	198 mm (7-13/16")
rear_speaker_height	198 mm (7-13/16")
front_speaker_depth	120 mm (4-3/4")
center_speaker_depth	120 mm (4-3/4")
rear_speaker_depth	120 mm (4-3/4")

Speaker Weight

front_speaker_net_weight	1.2 kg (2.6 lb)
center_speaker_net_weight	1.0 kg (2.2 lb)
rear_speaker_net_weight	0.8 kg (1.8 lb)

Subwoofer Specifications

subwoofer_output_power	50 Watts RMS
subwoofer_turn_over_frequency	80 Hz ~ 160 Hz
subwoofer_enclosure	Bass-Reflex
subwoofer_loudspeaker	200 mm (8") Cone type
subwoofer_nominal_impedance	40 O
subwoofer_frequency_response	40 Hz ~ 250 Hz

Subwoofer Dimensions and Weight

subwoofer_width	286 mm (11-1/4")
subwoofer_height	368 mm (14-1/2")
subwoofer_depth	356 mm (14")
subwoofer_net_weight	11.2 kg (24.7 lb)

Subwoofer Power and Input

subwoofer_supply_voltage	AC120V, 60 Hz
subwoofer_input_sensitivity_impedance_rca	100 mV/43 kC2, 200 mV/43 ka
subwoofer_input_sensitivity_impedance_push	1.8V/1.2 kQ