6359,00 €
Manufacturer: Hoellstern

DELTA12.2 Audio Amplifier

The DELTA12.2 amplifier is a high-performance two-channel power amplifier. With their two individual audio inputs and two individual audio outputs Hoellstern® amplifiers are perctly suited for all applications. The high sound quality, the extraordinary flexibility and the great overall quality are lasting guarantors for a future-proof  investment which will amortise quickly and make the daily routine of professional sound technicians a lot easier.

Hoellstern  Amplifier Technology:

  • 2 individual inputs and 2 outputs
  • Reinforced Neutrik® PowerCON® mains socket
  • 0.000 ms latency, ZeroLatency™ technology  
  • Reinforced high-current Neutrik® SpeakON® connectors
  • Exemplarily load stable high-current audio outputs
  • Full-metal Neutrik® XLR sockets and plugs
  • 2 x 2,2 kW / 2 x 4,4 kW at 8 ohms / 4 ohms
  • Sturdy, vacuum-cleanable spring steel air filter grids 
  • 2 x 6 kW / 2 x 8 kW at 2,7 ohms / 2 ohms
  • Black powder-coated full-metal housing 
  • Overall efficiency up to 85 %
  • All heatsinks screwed to housing for reinforcement
  • Comprehensive protective functions
  • Mechanically protected rotary controls and LEDs
  • Damping factor 1500 at 8 ohms
  • 2 RU housing weighting only 10 kg (22 lbs)
  • Strikingly audiophile, high-resolution, neutral sound  
  • 2 RU housing of only 29 cm depth (from rack ears)
  • Amazingly well-controlled bass response  
  • Replaceable 2 RU rack ears 
  • Digitally controlled amplifier setup
  • Top-grade temperature-controlled fans
  • Robust RS-485 network (and RS-232 interface)
  • Front sucking fans
  • Deterministic Hoellstern® network protocol  
  • Top-grade rear-panel switches (ball mechanism)
  • Active mains relieving PFC circuit  
  • Safe operation in damp and soiled ambience
  • Rugged iCVP® switching power supply technology
  • Permissible start-up temperature -40 °C
  • Intelligent AC mains management for 16 A breaker (B)
  • All functions internally controlled by firmware 
  • AC mains voltage from 75 V to 265 V (> 100 VDC)
  • All technologies successfully introduced since 01 / 200
  • AC mains frequency between 40 Hz and 100 Hz
  • DSP loudspeaker management as option available
  • Very high overall efficiency
  • Engineered and made in Germany
  • Maintenance-free design


The Hardware

Since its market launch in 01/2004, the Hoellstern® amplifier platform has been a trend-setting pioneer in the professional sound industry. It's not for nothing that competitors have been trying for years to emulate the technical properties of Hoellstern® amplifiers. With our no-compromise design and an equally uncompromising component selection we combine huge output powers with a high efficiency in a compact two-channel construction. Output currents of up to 125 Apeak and voltages of up to 190 Vpeak add to the load independent, strikingly audiophile and neutral sound: a synonym for Hoellstern® amplifiers. Double output power with halved impedance provides stress-free limiter settings and gives the sound technician at the console a feeling of ultimate control over a PA system.  Setting new standards, all Hoellstern® amplifiers have an active power factor correction (PFC) circuit integrated into their super performance switching power supply. Together with the intelligent software-controlled power management (iCVP®- intelligent Constant Voltage Power),this technology allows huge output powers and a safe operation at surprisingly small mains fusings with 16 A (class B circuit breaker). The broad AC mains input voltage range ensures constant high output powers even with AC mains fluctuations and AC mains frequency variations. For a longterm stressless and maintenance-free operation in rough environments, the electronic modules have been sealed against soil and humidity. A dependable cold start temperature of minus 40 °C documents the high quality standard of Hoellstern® amplifiers. In the event of failure, sophisticated protection circuits (LIMIT / LF / HF / TEMP) with intelligent software algorithms will gently limit the hardware without cutting out abruptly. Their high efficiency, relatively moderate heat generation, low heatsink temperatures and outstanding overall quality of workmanship are reflected in high reliability and a long service life.

The specifications 

  • Number of individual inputs 2
  • Number of individual outputs 2
  • Output voltagepeak > 190 V
  • Output current cut-out limitpeak (with 5 retries) 125 A
  • Output powers and permissible nominal loads Output C1 Output C2
  • 8 ohm [Bridge 8 ohm] 2200 W [8800 W] 2200 W
  • 4 ohm [Bridge 4 ohm] 4400 W [16000 W] 4400 W
  • 2.7 ohm > 6000 W > 6000 W
  • 2.0 ohms > 8000 W > 8000 W
  • THD at 1 kHz at 4 ohms and -3 dB < 0.03 %
  • Frequency response 20 Hz to 20 kHz at 8 ohms at -15 dB + / - 0.5 dB (typically + / - 0.05 dB)
  • Damping factor at 8 ohms, 100 Hz > 1000, typically 1500 comprising the SpeakON® connectors, typ. 5 mohms
  • Latency without DSP or bypass (connector to connector)  0.000 ms, ZeroLatency™ technology
  • Signal limiter Yes
  • Current monitoring  Yes
  • Temperature monitoring Yes, reduces the gain gently
  • LF limiter Yes, reduces the gain gently
  • HF limiter Yes, reduces the gain gently
  • AC mains supply monitoring / Power management Yes, safe operation at 16 A circuit breaker
  • Rearmounted gain factor toggle switch 26 dB and 32 dB basic gain 
  • Frontmounted rotary gain controls 0 dB to – 100dB, digitally controlled
  • Rearmounted bridge mode switch  Channel 1 and 2: Yes
  • AC mains supply input  1 x Neutrik® PowerCON®
  • Analogue input and slave connectors  2 x 3-pin Neutrik® full metal socket and 2 x 3-pin Neutrik® full metal plug
  • Amplifier output connectors 2 x 4-pin high current Neutrik® SpeakON®
  • Remote control network  Yes, D-Sub 9 socket, RS-485 network, RS-232 point-to-point, Hoellstern® protocol
  • Frontside status LEDs display  Standby, Signal Input, VU -6 dB, VU -3dB , VU 0dB and Signal Limit
  • Frontside error LEDs display  Current, HF / LF Limiter, Temperature
  • Frontside rotary controls  One rotary step control with digital sensing per channel
  • Frontside switches Standby / ON switch, software-controlled
  • AC mains input 180 VAC to 265 VAC, operative from 70 VAC, 400 V tolerant 
  • Starting current 10 A softstart
  • Intelligent AC mains power management Yes, iCVP®  
  • technology, dual hard-regulated switching power supply
  • Efficiency Up to 85 % (form the AC main to the audio outputs)
  • AC mains fusing 16 A (class B breaker), for personal alarm systems class C circuit breaker or better
  • Housing construction Black powder-coated steel body , anodised aluminium front panel
  • Handles and 19" rack ears Yes, anodised aluminium, replaceable
  • Air filter and grids Open-pore foam, spring steel grids, black powder-coated, vacuum-cleanable
  • Air rate and fans 3 fans, temperature-controlled speed, front sucking
  • Dimensions Width: 19" (483 mm), height: 2 RU (88 mm), overall depth: 290 mm from rack ears
  • Weight 10 kg (22 lbs), shipping weight 12 kg (26 lbs)


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