Boston acoustics GT-40 - Manual

6 Mechanical Functions Recessed RCA Inputs The input jacks are recessed into the body of the amplifier to provide clear-ance in tight mounting locations. Control Cover Removal & Reinstallation The cover panel is secured with two (2) captive coin-slotted screws. Coin-slottedscrews allow a coin ed...

8 Before You Install Before you install the unit, disconnect the negative (–) battery cable in the engine compartment of the vehi-cle. Doing so will prevent damage to both the electrical system of the vehicle and the amplifier during installation. Wire Routing Do not run the power wire near any low-...

9 13mm ( 1 / 2 ”) 57mm (2 1 / 2 ”) 225mm (8 7 / 8 ”) Choose the Mounting Location Plan your installation so that the amplifier is mounted where adequate ventilation is available. Never mount an amplifier in the engine compartment of a vehicle! WARNING! Before driving the mounting screws through any ...

10 Passenger & Trunk Compartment Mounting If the amplifier is mounted under a seat, be sure that the vents do not becomeblocked. Do not allow seat padding or other obstructive material to pressdown on the amplifier. All Boston GT amplifiers have top panel controls. If the amplifier is mountedund...

Power/B+ & Power/GND Connection Strip approximately 5 / 8 " (16mm) of insulation. The positive (+) power wire is installed into the amplifier terminal marked “B+.” The negative (–) wireis installed into the terminal marked “GND.” The ground wire should beas short as possible and connected di...

12 Mono Subwoofer Operation If the amplifier is to be bridged and used with a subwoofer connected to the REAR channels, use the“SPEAKER OUTPUT” terminals marked for mono use. WARNING! Subwoofer impedance must not fall below 2 ohms when in MONO mode. Installation—Fuses & Wiring (cont.) 1) Music T...

14 8) FRONT “Q” Control Once the FRONT highpass crossover point has been determined, use theFRONT “Q” control to increase the bass information centered around thecrossover point. Setting the front “Q” control is done in conjunction with setting the levels onthe input sensitivity and highpass crossov...

16 System Examples System A—Full-range Front with Full-range Rear 6 .5 L F 6 .5 L F fuse to + battery terminal to ground 6 .5 L F 6 .5 L F System B—Full-range Front with Rear Fill 6 .5 L F 6 .5 L F fuse to + battery terminal to ground 6 .5 L F 6 .5 L F GT-40_manual 4/10/03 4:17 PM Page 16

18 Amplifier Troubleshooting Guide Status LEDs on Amplifier not Lit — Head Unit (Source) Turned “ON” Verify Remote turn-on wire from source to amplifier has proper voltagePower (B+) connections at amplifier, terminal blocks, and battery are secureGround (GND) connections at amplifier and vehicle cha...

19 Contact and Warranty Information 300 Jubilee Drive Peabody, MA 01960 U.S.A. (978) 538-5000 Boston, Boston Acoustics, and the Boston logo areregistered trademarks of Boston Acoustics, Inc. © 2003 Boston Acoustics, Inc. All rights reserved.Specifications subject to change without notice. P/N 042-00...