Boston GT-20 Specifications

GT-20GT-222-Channel, High-Current/High-Power Amplifiers

10Passenger & Trunk Compartment MountingIf the amplifier is mounted under a seat, be sure that the vents do not becomeblocked. Do not allow seat pa

Power/B+ & Power/GND ConnectionStrip approximately 5/8" (16mm) of insulation. The positive (+) power wireis installed into the amplifier termi

12Mono Subwoofer OperationWhen the amplifier is configured for mono operation, use the speaker output terminals marked formono use.WARNING! Subwoofer im

13Setup Tuning—Full-range Speakers (cont.)4) Head UnitThe head unit should have all controls such as bass, treble, balance, and fader set to the flat o

148) “Q” ControlOnce the highpass crossover point has been determined, use the “Q” controlto increase the bass information centered around the crossov

154) Input Sensitivity Control Turn control all the way counterclockwise (minimum position). In this position, the amplifier will be less sen-sitive to

16System ExamplesSystem A—Full-range Front Speakersfuseto + battery terminalto ground6.5LF6.5LFSystem B—Rear Fill Speakersfuseto + battery termina

17System Examples (cont.)System C—Single Subwoofer (2Ω)System D —Parallel 4Ω Subwoofers (2Ω load)fuseto + battery terminalto ground10.5LF2Ωfuseto +

18Amplifier Troubleshooting GuideStatus LEDs on Amplifier not Lit—Head Unit (Source) Turned “ON”Verify Remote turn-on wire from source to amplifier has p

19Contact and Warranty Information300 Jubilee DrivePeabody, MA 01960 U.S.A.(978) 538-5000Boston, Boston Acoustics, and the Boston logo areregistered t

2Table of ContentsParts List 3Features and Specifications 3Control Functions 4Control functions (cont.) 5Mechanical Functions 6Recessed RCA inputs 6Con

Included Hardware: GT-20 & GT-22(1) owner’s manual(1) female quick-connect terminal(1) 2mm hex wrench (for speaker input)(1) 3mm hex wrench (for p

4Control FunctionsRCA InputsRCA cables from head unit or from other line level device should be connectedhere. Use both inputs (L & R) for stereo;

5Control Functions (cont.)Lowpass Crossover ControlsTo use 12dB/octave crossover, move switch to right-hand position. Lowpasscrossover frequency is a

6Mechanical FunctionsRecessed RCA InputsThe input jacks are recessed into the body of the amplifier to provide clear-ance in tight mounting locations.C

7Mechanical Functions (cont.)Amplifier LinkingThe design of the side panels enables multiple amplifiers to be used together without additional hardware.

8Before You InstallBefore you install the unit, disconnect the negative (–) battery cable in the engine compartment of the vehi-cle. Doing so will pre

957mm (2.5")Choose the Mounting LocationPlan your installation so that the amplifier is mounted where adequate ventilation is available. Never mo