JBL SB300, JBL SB230 Powered sound bar with wireless powered subwoofer schematic

 

SB300 POWERED SOUNDBAR SPEAKER

Low-frequency transducer: Two 2" (51mm) cones per channel, video shielded

High-frequency transducer: One 1" (25mm) dome per channel, video shielded

Amplifier power: 30 watts per channel

Audio controls: Volume, surround mode

Connections: Optical digital (TOSLINK™) input, stereo analogue (RCA-type) inputs

Power requirement: 120V – 240V, 50Hz/60Hz, 80W

Power consumption: 1W standby; 80W maximum

Dimensions (H x W x D): 3-5/8" x 45-3/4" x 3" (92mm x 1162mm x 76mm)

Weight: 5.5 lbs. (2.5kg)

SB300 SUBWOOFER

Low-frequency transducer: 8" (200mm) cone, down-firing

Enclosure type: Ported (down-firing)

Amplifier power: 100 watts

Frequency response: 42Hz – 200Hz (–3dB)

Audio controls: Level, phase, cut-off frequency

Connections: LFE input, left and right RCA line-level inputs

Power requirement: 120V – 240V, 50Hz/60Hz, 160W

Power consumption: 1W standby; 160W maximum

Dimensions (H x W x D): 19" x 14-1/4" x 14-1/4" (483mm x 362mm x 362mm)

Weight: 24.5 lbs. (11.1kg)

TURNING THE SOUNDBAR ON AND OFF

Set the sound bar’s Power switch to the “On” position.

Press the Power button on either the sound bar or the remote to turn the sound bar on. To put the sound bar in the Standby mode, press either Power button while the sound bar is on.

If you do not press the Power button, the sound bar will automatically go into the Standby mode approximately 15 minutes after the audio signal ceases. NOTE: If you have put the sound bar into the Standby mode by pressing the Power button, you must manually turn it on by pressing the Power button again. If the sound bar has automatically gone into the Standby mode 15 minutes after the audio signal has ceased, it will automatically turn itself on when it receives an audio signal at either the analogue (Aux) input or the optical digital input.

TURNING THE SUBWOOFER ON AND OFF

Set the subwoofer’s Power switch to the “On” position. The subwoofer will automatically attempt to establish pairing with the sound bar (the subwoofer’s LED will flash blue). If pairing is not established within one minute, the subwoofer will enter the Standby mode (its LED will turn amber). If pairing is established, the subwoofer will turn on (its LED will light blue continuously).  The subwoofer will remain on for approximately one minute after the sound bar enters the Standby mode, or for approximately 15 minutes

after the audio signal ceases.

If you will be away from home for an extended period of time, or if you will not be using the system for an extended period, set the subwoofer’s Power switch to the “Off” position.

PAIRING THE UNITS FOR WIRELESS OPERATION

After turning the sound bar and subwoofer on for the first time, you will need to “pair” the subwoofer and sound bar so they both operate at the same wireless frequency. To pair the units, press the Wireless Pairing switches on both units within 30 seconds. The units will communicate with each other and operate at the same frequency.

NOTE: The maximum wireless operating distance between the sound bar and subwoofer is approximately 50 feet (15.3m).

ADJUSTING THE SYSTEM’S VOLUME

Press the sound bar’s or remote’s Volume Up and Down buttons to raise and lower the system’s volume one step at a time. Hold down the buttons to continuously raise or lower the volume.

MUTING THE SYSTEM

Momentarily press the sound bar’s Power button or press the remote’s Mute button to mute the system. (The Power Indicator flashes blue.)  Momentarily press the sound bar’s Power button or press the remote’s Mute button again to un-mute the system. (The Power Indicator turns to a steady blue.)

SURROUND MODE BUTTONS

These buttons switch the sound between normal stereo (the Surround Mode Indicator lights white) and 3-D Surround (the Surround Mode Indicator lights blue). The 3-D Surround setting will produce a complete surround-sound experience for anyone sitting in front of and several feet away from the sound bar. Although it is particularly effective when watching movies, you can also try the 3-D Surround setting for music

SUBWOOFER LEVEL KNOB

Use the subwoofer’s Level knob to balance the bass with the rest of the sound. Play music or movies that you are familiar with, and adjust the subwoofer’s Level knob so the bass sounds balanced on both music and films. Listen to several different music recordings and film soundtracks that contain strong bass passages, and find a setting for the Level knob that doesn’t over-emphasize the bass or make it sound weak

Once you find a setting for the subwoofer’s Level knob that balances the bass with the rest of the sound, you shouldn’t have to change it

SUBWOOFER CUTOFF CONTROL

The subwoofer’s Cut-off control adjusts the subwoofer’s cut-off between 40Hz and 200Hz. The higher you set the Cut-off control, the higher in frequency the subwoofer will operate and the more its bass will “overlap” that of the sound bar. This adjustment helps achieve a smooth transition of bass frequencies between the subwoofer and the sound bar for a variety of different rooms and subwoofer locations.  To set the Cut-off control, listen for the smoothness of the bass. If the bass seems too strong at certain frequencies, try a lower Cut-off control setting. If the bass seems too weak at certain frequencies, try a higher Cut-off control setting.

SUBWOOFER PHASE SWITCH

This switch determines whether the subwoofer’s piston-like action moves in and out in phase with the speakers in the sound bar. If the subwoofer were to play out of phase with the sound bar speakers, some of the sound waves produced by the sound bar and subwoofer could be cancelled out at some frequencies, reducing bass performance and sonic impact. This phenomenon depends in part on the relative placement of the sound bar and subwoofer in the room.  Although there is no absolutely correct setting for the Phase switch, in most cases it should be left in the “0°” position. When the subwoofer is properly in phase with the sound bar speakers, the sound will be clearer and have more impact. It will make percussive sounds like drums, piano and plucked strings sound more lifelike. The best way to set the Phase switch is to listen to music that you are familiar with and adjust the switch so that drums and other percussive sounds have maximum impact.

Schematic diagram