The hd QT-Series are 4-channel class D power amplifiers with switched-mode power supplies specially optimized for long-term maximum performance, which deliver high energy (= power × hold time) for the best LF reproduction. That’s why the hd QT8 generates 4x 2,000 W at 4 ohms and the hd QT12 4x 3,000 W at 4 ohms with a crest factor of 3 dB!
Concentrated on the essentials and cost-efficient: Reduced to the most important features in everyday touring and intuitive to use, the hd QT-Series delivers reliable high performance day after day in just 2 U. Four analog inputs enable Plug&Play. A generously dimensioned cooling system with temperature-controlled fans allows operation under full load with minimal noise development.
The user interface consists of an LCD display with navigation buttons for visual information and quick access to key functions such as presets, routing matrix, delay and gain. A USB port on the front is used to connect to the proprietary hd LevelZ software suite. This is used for comprehensive system planning, simulation, management and system tuning of all Harmonic Design systems, from the 2.1 active system to large sound reinforcement systems, and offers maximum freedom in sound shaping and loudspeaker management.
The hd MultiDSP combines IIR and FIR filters to create perfectly linearized phase curves and significantly improved impulse responses for a smooth, more natural, transparent and realistic sound experience.
Very practical for rentals that change on a daily basis: the DSP of the system amplifier can be reconfigured using a notebook or power bank without a mains connection and without integration into the network, and it can be quickly and easily prepared for the next use. Time-consuming reconfiguration of basic systems is no longer necessary.
|Output circuit||Class-D Full-Bridge|
|Power rating (RMS @ 1% THD)||4x 1.800 W @ 8 Ω
4x 3.000 W @ 4 Ω
4x 3.000 W @ 2 Ω
|Operating voltage||115VAC: 90-132VAC, 47-63 Hz
230VAC: 180-264VAC, 47-63 Hz
|Power supply||High efficiency, high power switching mode power supply, PFC|
|protection circuit||switch-on delay
temperature and output current monitoring
|Controls||5x navigation buttons|
|Display||3.2″ LCD display with 4 lines of 20 characters each
LED-VU meter each channel
|Connection||USB B jack
4x input XLR (balanced)
4x link XLR (balanced)
1x AC mains connector Powercon 32A
4x output Speakon NL4
|Dimensions (W x H x D)||19“ x 2 HE x 503 mm|
|Enclosure||2 mm steel sheet
powder coating black