Norman Audio

DarTZeel NHB-18NS Preamplifier

The heart and soul of a system that inspires.

The most advanced preamplifier ever designed.

With its groundbreaking signal path technology, battery power supply and unrivalled phono stages, the NHB-18NS is still the benchmark for preamplifiers.

The DarTZeel NHB-18NS is peerless in terms of clarity and musicality. Designed to control NHB-series power amplifiers, it offers state-of-the-art preamplification and control.
50-ohm darT-to-Zeel connection cables complete this exquisite offering.

Simple and efficient

Machined from a solid block and held comfortably in your hand, the NHB-18NS remote control provides access to its key functional features.

Inside view

darTZeel has always developed the most rapid audio circuits.

The NHB-18NS’s unique circuit board layout allows each optical input to be activated separately.

The absence of global negative feedback ensures an ideal and uncompromising listening experience.

Visible differences

darTZeel’s NHB-series represents the pinnacle of musical reproduction. Its products are designed and built like works of art.

Peerless workmanship

For the NHB series, each aluminium component is milled from a solid block, hand-finished, brushed and anodised.

This underlines the uniqueness and exclusivity of the NHB series.


Line Gain:Up to +11 dB
Phono Gain:54 to 72 dB (up to 83 dB gain at output)
Analog Input Impedances:Zeel BNC 50 Ohms, 1 Hz to 1 MHz
RCA line > 30 kohms, 5 Hz to 50 kHz
XLR > 15 kohms, from 5 Hz to 50 kHz
Phono MC: User select from 43 ohms up to 47K Ohms
Line Output Impedance:RCA – 75 ohms, darT BNC – 50 ohms, XLR < 600 ohms, REC OUT < 150 ohms
Frequency Response:5Hz – 500 kHz, +0. -1 dB
Rise Time:< 0.5 µs
Slew Rate:> 24 V/µs, peak-peak
DC Output Voltage:< ± 50 mV max
Total Harmonic Distortion (THD):<1 % from 10 Hz to 100 kHz within the output dynamic range
Temporal Distortion:None, at any level and load, as specified above
Crosstalk:< -80 dB from 20Hz to 20kHz
Signal to noise ratio:>92 dB(A), Line; > 70dB(A), Phono w/factory settings
Power Consumption:7 – 77 watts depending on working conditions
Size in mm:430 x 335 x 170 (WxDxH)
Total deep with handles: 415mm
Size in inches:17.32 x 13.2 x 6.7 (WxDxH)
Total deep with handles: 16.4 inches
Net Weight:24kg, power supply 3kg, total 27kg
Fuse ratings:115 volts: 1.0A (T) or slow blow
230 volts: 0.5A (T) or slow blow



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