GTA Otto

8 x 3000 W in two Rack Units



Suitable for Single-Phase, Bi-Phase or Three-Phase operation from 85 VAC up to 460 VAC, the X8 power supply provides maximum flexibility and versatility in any power distribution design
Power Load Balancing with Power Factor Correction enhances efficiency in power distribution
Flexible routing/mixing provided by the internal 8×8 input/output matrix, allows the user to mix and route analog and digital I/O Easy plug-and-play Dante™ networking allows easy routing of the signal from any node within the network to the GTA Otto
Improved reliability thanks to the customizable input backup policy that allows to automatically switch input source in case of signal failure
Input and output IIR, FIR, IIR+FIR equalizers and raised-cosine filters, complete sets of limiters: peak, RMS voltage, RMS current, and TruePower™
Full protection circuitry: over/under AC voltage; troublesome signals (clipping, VHF, long-term RMS); DC; thermal; short circuit; mute at power on/off


The GTA Otto has been designed to be versatile and easy to use in any operation condition. Equally useful for most subwoofers as well as high power fullrange systems, Outline GTA Otto suites any configuration and purpose.

Ultimately flexible and safe, Outline’s power supply is now suitable to Single Phase, Bi-Phase or Three Phase operation from 85 VAC up to 460 VAC without need of selection. True Three Phase load balancing is directly achievable by the unit without any complex load assignment in the power distribution system. Outline GTA Otto provides eight fully processable channels and selectable inputs from analog sources as well as digital AES3 and two redundant Dante™ streams.

Channel mixing and routing can be easily performed thanks to the integrated revolutionary low latency DSP, providing the highest degree of freedom in sound shaping and speaker management.

Full support to 100 Mbps and Gigabit Ethernet makes it easy to integrate Outline GTA Otto into any existing infrastructure. Completely integrated into Armonía Pro Audio Suite™, the new GTA Otto interface is also available for smartphone and tablet, providing a new experience in power management.


Number of channels 8
Output power
(per channel)
Single channel mode: 5200 W @ 2 Ω, 3000 W @ 4 Ω,  1600 W @ 8 Ω
Bridge mode: 10400 W @ 4 Ω, 6000 W @ 8 Ω
Max output voltage 175 V peak
Max output current 130 A peak
AC Main Power Universal, Single Phase, Bi-Phase or Three Phase acceptance, switching mode with PFC
Operating voltage 85 V – 440 V
Operating temperature range 0° – 35° C – 32° – 95° F
Frequency response 5 Hz – 30 kHz
Noise floor < -70.0 dBV
Crosstalk separation -70 dB
THD+N > 0.5% (typically > 0.01%)
IMD > 0.5% (typically > 0.01%)
Input impedance 20 kΩ balanced
Slew rate > 50 V/μs
Damping factor > 5000 @ 8 ohm, 20Hz – 500Hz
DSP architecture ARM Cortex A-8 processor and TI C6000 DSP platform
AD Converter Dual 24 bit 48 kHz Tandem® architecture with 129 dBA of dynamic range
DA Converter Dual 24 bit 48 kHz Tandem® architecture with 121 dBA of dynamic range
Internal precision 40 bit floating point
Firmware Network upgradable firmware
Latency 2.53 ms fixed latency architecture
Input equalizer Raised-cosine, custom FIR, parametric IIR: peaking, hi/lo-shelving, all-pass,
band-pass, band-stop, hi/lo-pass
Output equalizer Raised-cosine, custom FIR, parametric IIR: peaking, hi/lo-shelving, all-pass,
band-pass, band-stop, hi/lo-pass
Crossover Linear phase (FIR), hybrid (FIR-IIR), Butterworth, Linkwitz-Riley, Bessel: 6
dB/oct to 48 dB/oct (IIR)
Delay up to 2 s on input section; up to100 ms per output for time alignment
Limiters TruePower™, RMS voltage, RMS current, Peak limiter
Damping control Active DampingControl™


Input connector 8 x XLR-F – Analog signal input
4 x XLR-F AES3 signal input
Network connector 2 x RJ45 port with Dante
Output connector 4 x speakON
Height 88 mm – 3 1/2″
Width 483 mm – 19″
Depth 495 mm – 19 1/2″
Weight 24 kg – 52.9 lb


GTA 8 Brochure

Oct 2019

GTA 8 Architectural Specifications

Dec 2019

GTA Series User Manual

Jun 2023

App Note – Speaker library update

May 2024

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