JBL SYNTHESIS FOUR S4Ai User Manual

SYNTHESIS
®
FOUR
S4VC, S4HC
& S4Ai
F
LUSH-MOUNT
LOUDSPEAKERS
OWNER
’
S AND INSTALLER
’
S
MANUAL

JBL SYNTHESIS FOUR S4Ai Specifications

General

Impedance	6 Ohms
Tweeter Size	1 inch
Crossover Frequency	2.5kHz
Type	In-Wall
Power Handling	200W
Tweeter	Pure Titanium Dome

Summary

Speaker Placement

Left and Right Speakers

Positioning front left and right speakers for maximum sound localization.

Center Channel Speakers

Guidance for mounting center channel speakers vertically or horizontally.

S4Ai Modes of Operation

Configuring the S4Ai for Dipolar, Bipolar, or Direct Radiating modes.

S4Ai Wiring Guide

Which Diffuse Mode is the Right One for the Job?

Preparing the S4Ai for the Correct Operational Mode

S4Ai Dual-Drive Mode

Mounting the Speakers

Speaker-Mounting Options

Requirements for Mounting

Essential requirements and considerations for speaker installation.

Connecting the Speakers to the Rest of Your System

Preparing the Hookup Wire

Fine-Tuning Your Audio System

Acoustical Problems in Listening Rooms

Room Reflections

"Slap" Echoes

Rattles

Background Noise

Background-Noise Solutions

Standing Waves

Troubleshooting

No Sound Coming From Speaker

Addressing issues when no sound is produced by a speaker.

Bass Is Very Weak

Troubleshooting low bass output from the system.

Poor or Smeared Imaging

Diagnosing causes for unclear or distorted sound imaging.

Indistinct Dialogue

Resolving issues with unclear dialogue reproduction.

Uneven Surround Coverage

Improving the balance and coverage of surround sound effects.