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Features
Controls
Connections
Features
GTA-series Amplifiers: The Boston Acoustics GTA-1005 amplifier
is part of the GTA-series; this 5-channel amp uses a standard AB design for the
front and rear channels, and an efficient Class-D design for the subwoofer channel
to deliver increased power into lower impedances. The low profile design makes
installation in tight locations easier.
2-Ohm Stable: The GTA-1005 can be connected to loads with
impedances as low as 2 Ohms; the lower the impedance, the higher the output
power:
- Front and Rear Channels:
- 50 watts x 4 @ 4 ohms
- 80 watts x 4 @ 2 ohms
- 160 watts x 2 @ 4 ohms (bridged)
- Subwoofer Channel:
- 250 watts x 1 @ 4 ohms
- 400 watts x 1 @ 2 ohms
Controls and Terminals: All the controls and terminals are
conveniently mounted on one side of the amp.
Controls
Gain: Each of the three inputs has its
own rotary gain control knob to adjust the input sensitivity;
the range is 0.2 Volts to 5.0 Volts (line-level) or 0.4 Volts
to 10.0 Volts (speaker-level).
Crossover Switch: Choose from high-pass,
low-pass, and off (full range) for the crossover on the front
and rear channels.
Crossover Frequency: The front and
rear channel crossover (low-pass or high-pass) points are
continuously variable from 50 Hz to 200 Hz; the slope is
12 dB/octave.
Subwoofer Low-pass Filter: The low-pass
filter on the subwoofer channel is always on and controlled
using a rotary knob; it is continuously variable from 50 Hz
to 150 Hz; the slope is 12 dB/octave.
Subsonic Filter: The subsonic (high-pass)
filter on the subwoofer channel is always on and controlled
using a rotary knob; it is continuously variable from 10 Hz
to 50 Hz; the slope is 12 dB/octave.
Q-Tune: Once the subsonic crossover
point has been determined, use the rotary Q-Tune control
to increase the bass information centered around the
crossover point.
Connections
Speaker-level Input: Each of the three
inputs (front channel, rear channel, and subwoofer) has an
independent Molex plug for use with the included harnesses
when the receiver has no RCA outputs.
Line-level Input: Each of the three
inputs has left and right RCA jacks for the input signal
from the head unit.
GTA-RSL: RJ-14 port; connect an optional
GTA-RSL remote subwoofer level control (item number
065GTARSL,
sold separately).
Speaker Output: Four pair of set-screw
terminals provided for connecting the front and rear channel
speakers; the terminals can accept up to 10-gauge wire; the
set screws are tightened/loosened with the supplied 2mm Alen
wrench.
Subwoofer Output: One pair of set-screw
terminals provided for connecting a subwoofer; the terminals
can accept up to 8-gauge wire; the set screws are
tightened/loosened with the supplied 3mm Alen wrench.
ATO Fuses: Three 25-amp ATO-type
fuses are located between the speaker and power terminals.
Power/Ground: Two set-screw terminals
for connecting power and ground wires; each terminal
accepts up to 4-gauge wire; the set screws are
tightened/loosened with the supplied 4mm Alen wrench.
Remote: Set-screw terminal for
connecting the remote wire; terminal accepts up to
8-gauge wire; the set screws are tightened/loosened
with the supplied 3mm Alen wrench
