Introduction Thank you for choosing Boston Acoustics® and congratulations on your purchase of the Barton GT® 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.
Parts List Included Hardware: installation Manual Female Quick-Connect Terminal {for remote turn-on input} 2mm Hex Wrench 3mm Hex Wrench Mounting Screws Specifications Technical Specifications: Rated Power {C EA-2006-A): @ 4-Ohm (Stereo: @ 2-Ohm (Stereo) @ 2-Ohm (Mono) Mixed Operation (C EA-2006-A): @ 4-Chm (Stereo) & 2-ohm (Mono): Rated Power {12v): @ 4-Chm (Stereo): @ 2-Ohm (Mono) Frequency Response Sinai-to-Noise Ratio (A Weighted): THANT: High pass Crossover: Frequency Range: Slope (dB Per Octave): Low
Connections GT-475 Front RCA Input ® Remote Turn-On (female spade connector supplied) © Rear RCA Input © Remote Gain Port {refer to GT-RS manual for installation instruction) © Front LefyRight/Mono Speaker Outputs {12-gauge accepted) @ Rear Left/Right/Mono Speaker Outputs (12-gauge accepted) ®@ 12v Power Input (4-gauge accepted) © Ground Wire Input {4-gauge accepted) Top Panel Removal / Installation ? 6 The cover panel is secured with two (2) 3mm screws.
Controls GT-475 Signal Routing Switch {Sends Front RCA Signal to Rear Channels) @ Front Channel Input Sensitivity (250mv to 8.0v continuously variable) © Front Channel High pass Frequency Adjustment (20Hz to 350Hz variable) @ Front Channel High pass Crossover OFF/ON Switch ® Front Channel High pass Crossover Q-Tune™ Ad]. (0.707 to 1.
hae hon 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.
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” (46cm) on the positive power wire. The rating of the inline fuse should equal the value of the internal fuse of the amplifier if only the single amplifier is connected to this wire.
Tuning The Amplifier Front and Rear Speakers 1) Music The material chosen for system tuning must be both clear in recording quantity 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 RCA {independent front and rear Carcass, set the switch to DEDICATED FRONT AND REAR INPUTS .
Tuning The Amplifier Front and Rear Speakers 6) Input Sensitivity Control Starting with the front channels, slowly rotate the control clockwise {refer to the diagram on page 5) until maximum undistributed 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. Repeat for the rear channels.
Tuning The Amplifier Front Speakers and Sub woofer (s) 1} Front Signal Routing Switch If using two sets of RCA {independent front and rear Carcass, set the switch to DEDICATED FRONT AND REAR INPUTS . If you are using one set of RCA for both front and rear channels, set the switch to SEND FRONT RCA SIGNAL TO REAR. (refer to the diagram on page 5). 2} Head Unit The head unit should have all controls such as bass, treble, balance, and fared set to the flat or centered position.
J} Tuning The Amplifier Front Speakers and Sub woofer (s} High pass Crossover Control (Front Channel Only) Cont. Slowly rotate the input sensitivity control clockwise until maximum undistributed 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. Slowly rotate the high pass crossover control counterclockwise while listening for bottoming.
Amplifier Troubleshooting Guide Status LED 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 LED Lit, no Output from Speakars—Spsakers in Normal Operating Condition Verify High-level! cables