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Table of Contents
Related Manuals for Boston Mobile Audio GT-475
Summary of Contents for Boston Mobile Audio GT-475
- Page 1 4-Channel Amplifier Owners Manual...
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Page 2: Table Of Contents
Introduction Thank you for choosing Boston AcousticS® and congratulations on your purchase of the Boston GTE' Amplifier. If you own other Boston products, the outstanding audio performance and ease-of-use of the GT Amplifier should come as no surprise. If you're new to Boston, welcome - you've made a great choice. -
Page 3: Parts List
Parts List GT-4100 Included Hardware: G7=-475 Installation Manual Female Quick-Connect Terminal (for remote turn-on input) 2mm Hex Wrench 3mm Hex Wrench Mounting Screws Specifications G7=-475 G7=-4100 Technical Specifications: Rated Power (CEA-2006-A): 100 Watts x 4 75 Watts x4 @ 4-0hm (Stereo): 150 Watts x4 120 Watts x4 @ 2-0hm (Stereo) -
Page 4: Connections
Connections GT-4100 GT-475 Front RCA Input 8 Remote Turn-On (female spade connector supplied) • Rear RCA Input Remote Gain Port (refer to GT-RSL manual for installation instruction) ., Front Left/Right/Mono Speaker Outputs (12-gauge accepted) Rear Left/Right/Mono Speaker Outputs (12-gauge accepted) -
Page 5: Controls
Controls GT-4100 GT-475 Signal Routing Switch (Sends Front RCA Signal to Rear Channels) Front Channel Input Sensitivity (250mv to 8.0v - continuously variable) Front Channel Highpass Frequency Adjustment (20Hz to 350Hz - variable) Front Channel Highpass Crossover OFF/ON Switch Front Channel Highpass Crossover Q-Tune™ Adj. (0.707 to 1.6 - variable) -
Page 6: Installation - General
Installation - General WARNING! Before driving the amplifier mounting screws through any surface, be sure of what is behind that surface. Check for the gas tank, brake lines, and any vehicle wiring harness. Never run wires outside or under the vehicle or where they could become broken or interfere with the safe operation of the vehicle. Before You Install Before you install the unit, disconnect the negative (-) battery cable in the engine compartment of the vehicle. -
Page 7: Installation - Wiring
Installation - Wiring Amplifier Fuses Although the amplifier has an internal fuse, additional fuse protection should be installed as close as possible to the battery on the positive power wire going to the amplifier. An inline fuse should be installed at no more than 18"... -
Page 8: Tuning The Amplifier - Front And Rear Speakers
Tuning The Amplifier - Front and Rear Sp_e_ak_e_r._s 1) Music The material chosen for system tuning must be both clear in recording quality and dynamic in amplitude. Many audiophile "test" discs have musical tracks with both of these characteristics and should be used. 2) Front Signal Routing Switch If using two sets of RCAs (independent front and rear RCAs), set the switch to DEDICATED FRONT AND REAR INPUTS. -
Page 9: Input Sensitivity Control
Tuning The Amplifier - Front and Rear Sp..;;...e..:..ak_e_r_s 6) Input Sensitivity Control Starting with the front channels, slowly rotate the control clockwise (refer to the diagram on page 5) until maxi- mum undistorted playing level is heard from the speakers. Listen closely for bottoming from the speakers. If detect- ed, rotate the input sensitivity control counterclockwise until it is eliminated. -
Page 10: Tuning The Amplifier - Front Speakers And Subwoofers
Tuning The Amplifier - Front Speakers and Subwoofer (s) 1) Front Signal Routing Switch If using two sets of RCAs (independent front and rear RCAs), set the switch to DEDICATED FRONT AND REAR INPUTS. If you are using one set of RCAs for both front and rear channels, set the switch to SEND FRONT RCA SIGNAL TO REAR. -
Page 11: Highpass Crossover Control
Tuning The Amplifier - Front Speakers and Subwoofer Highpass Crossover Control (Front Channel Only) Cont. Slowly rotate the input sensitivity control clockwise until maximum undistorted playing level is heard from the speakers. Listen closely for bottoming from the speakers. If detected, rotate the input sensitivity control counterclockwise until it is eliminated. -
Page 12: Amplifier Troubleshooting Guide
Amplifier Troubleshooting Guide Status LEOs on Amplifier not Lit-Head Unit (Source) Turned "ON" Verify Remote turn-on wire from source to amplifier has proper voltage Power (B+) connections at amplifier, terminal blocks, and battery are secure Ground (GND) connections at amplifier and vehicle chassis are secure Battery B+ fuse and amplifier fuse are OK B+ at battery and B+ at amplifier have proper voltage Status LEOs Lit, no Output from Speakers-Speakers in Normal Operating Condition...