Norman Audio

DarTZeel NHB-468 Power Amplifier

Power, elegance and grace. DarTZeel’s NHB-468 monoblock amplifiers represent the pinnacle of their range. Travel faster than the speed of thought with the NHB-468.

The most powerful amplifiers ever developed by darTZeel.

NHB-468 monoblocks are the most powerful amplifiers ever designed and built by darTZeel. They are the culmination of nine years’ research and development.

NHB-468 mono amplifiers retain all the musicality of the original signal. The NHB-468’s immense power supply ensures that they can cover the full dynamic range, providing effortless delivery from a few milliwatts through to a whopping kilowatt of power.

Musical escape without compromise

We like to say that the NHB-468s are faster than the speed of thought.

State of the art

The NHB-468 highlights more than ever darTZeel’s considerable expertise: a generous power supply, a shielded transformer suspended by a dedicated platform, a chassis built from specially extruded aluminium components in line with darTZeel specifications, toughened glass side panels with a sanded logo, and a cooling unit finished and polished by hand.

Swiss precision

Every detail makes the darTZeel NHB-468 an exceptional amplifier. The casing alone required more than 80 hours of machining, with the same amount of time allocated to finishing, anodising and final assembly. The NHB-468’s specially developed audio circuits offer unparalleled musical output, from 0.001 to 1,000 watts and beyond.
Listening to music without limits is now a reality.


Nominal Output Power:500 watts RMS (850 watts peak) @ 8 ohms
900 watts RMS (1700 watts peak) @ 4 ohms
1200 watts RMS (1800 watts peak) @ 2 ohms (software limited)
Voltage Gain:26 dB and 32 dB, user selectable (ref. 8 ohms)
Analog Input Impedances:1 x BNC Zeel 50 Ohms, 1 Hz to 1 MHz
1 x RCA line > 30 kohms, 5Hz to 100kHz
1 x XLR > 30 kohms
Speaker Output Impedance:<0.28 ohm from 20Hz–20kHz (measured under 8 ohms)
Frequency Response:0.7Hz – 700 kHz, +0. -3 dB
Rise Time:< 0.8 µs
Slew Rate:> 200 V/µs, peak-peak
DC Output Voltage:< ± 50 mV max
Total Harmonic Distortion (THD):<1 % from 7 Hz to 77 kHz within the output dynamic range
Temporal Distortion:None, at any level and load, as specified above
Signal to noise ratio:>115 dB(A) @ nominal power
Power Consumption:2 watts Standby, 40 watts @ idle
2000 watts @ maximum output power
Size in mm:277 x 511 x 460 (WxDxH)
Size in inches:11 x 20 x 18 (WxDxH)
Net Weight:154 lbs (70kg)



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