darTZeel NHB-18 NS MK II

darTZeel NHB-18NS MK II Preamplifier - Client Consignment

One Owner · Factory-Built MK II · Exceptional Condition

Up for sale is a darTZeel NHB-18NS MK II preamplifier, factory-built as an MK II (this is not an upgraded earlier version). This is a one-owner unit that has been meticulously cared for in a dedicated, smoke-free listening environment. Cosmetically and functionally, it is outstanding and presents very close to new.

The NHB-18NS MK II represents the most refined execution of Hervé Delétraz’s no-compromise, battery-powered, no-switch preamplifier design. Compared to the original version, the MK II benefits from meaningful circuit refinements, improved grounding, and enhanced power management that further reduce noise, increase resolution, and improve dynamic expression—while fully preserving the natural, emotionally engaging musicality that defines darTZeel.

If you have ever wanted to own one of the world’s truly reference-grade analog preamplifiers, this is the example to buy.

Key Features & MK II Enhancements

True “No-Switch” (NS) Architecture
Each input has its own dedicated amplification stage. There are no relays or mechanical switches in the signal path, eliminating contact degradation and preserving signal purity.

Battery-Powered Audio Circuitry (MK II Refinement)
Dual, isolated battery banks power the entire audio section, fully decoupling the signal path from the AC grid during listening. The MK II incorporates refined charging logic and noise isolation for an even blacker background.

Improved Power Management & Regulation
The MK II features enhanced power regulation and grounding topology, yielding lower noise, improved micro-detail, and greater dynamic contrast compared to the original version.

Ultra-Low Noise Floor
With AC ripple eliminated from the signal path, the NHB-18NS MK II delivers exceptional transparency, tonal density, and spatial realism.

Hand-Built Swiss Craftsmanship
Precision-machined aluminum chassis, boutique-grade components, and darTZeel’s uncompromising analog design philosophy throughout.

Zeel 50-Ohm BNC Connectivity
Direct, impedance-matched Zeel BNC connections allow optimal interface with darTZeel amplifiers for maximum signal integrity.

Minimalist Control Interface
Signature high-precision “Pleasure Control” volume and “Enjoyment Source” selector knobs, plus a beautifully machined remote control.

MK II Specifications

Inputs

• RCA

• XLR

• Zeel 50-ohm BNC

• MC Phono

Output Impedances

• RCA: 75 Ω

• Zeel BNC: 50 Ω

• XLR: < 600 Ω

• REC Out: < 150 Ω

Frequency Response

• 5 Hz – 500 kHz (±1 dB)

Rise Time

• < 0.5 µs

Slew Rate

• 24 V/µs

Total Harmonic Distortion (THD)

• < 1% (10 Hz – 100 kHz)

Crosstalk

• < –80 dB (20 Hz – 20 kHz)

Signal-to-Noise Ratio

• Line: > 92 dB (A-weighted)

• Phono: > 70 dB (A-weighted)

Power Consumption

• 7 – 77 W depending on operating mode

Dimensions

• 440 × 335 × 170 mm

• Depth with handles: 415 mm

Weight

• 24 kg main chassis

• 3 kg external power supply

Condition

This NHB-18NS MK II is in excellent condition:

• No visible scratches, marks, or discoloration

• All controls operate smoothly and precisely

• Battery and charging systems function flawlessly

• Clean interior and pristine connectors

Owned by a careful audiophile and used in a dedicated listening space. Conservatively rated 8/10 due to age, though it presents closer to 9/10.

Included

• darTZeel NHB-18NS MK II preamplifier

• Factory external power supply

• Machined darTZeel remote control (Tiny ding that was hard to photograph)

• Power cable

• Original manual

The Audio Association is an authorized dealer for the following lines
Soulution / DarTZeel  / Constellation Audio / Evolution Acoustics / Mola Mola
Grimm Audio / SPL / WestminsterLab / Diptyque / Durand Tonearms / Taiko Audio
Wave Kinetics / Ortofon Miyajima Labs / Etsuro-Urushi / Audio-Technica / Hana
Kuzma / DS Audio / Graham Engineering / PSI Audio (AVAA C20 and C214)
ATR Service / DejitterIt / Silent Angel