The NAP 155 XS is the perfect companion to the NAC 152 XS audio preamplifier in an XS system. It features a very large mains transformer - both physically and in terms of its power rating - and at the heart of its power supply uses the same reservoir capacitors as the award-winning SUPERNAIT integrated amplifier.
The NAP 155 XS employs similar construction techniques to the NAIT XS integrated amplifier with a castellated heat-sink and reduced earth reference routing to deliver enhanced performance and more music. The NAP 155 XS is a power amplifier straight out of the classic Naim mould: fast, detailed, dynamic and single-mindedly musical.
Features
The heart of the amp circuit is a version of the world class NAP 500 with a substantial and very quiet power supply using a custom designed and manufactured toroidal transformer.
Improvements over the previous NAP 150x include: a new toroidal transformer for improved regulation; separate transformer windings for CH1 and CH2 and preamp; and an up-rated preamp power supply to improve the performance of the preamp.
Where required the NAP 155 XS can be used in most series of systems, both passive and active.
Technology & Craft
The NAP 155 XS is flexible enough to be used in most types of systems, both passive and active but retains an unwavering focus on performance.
The heart of the amplifier circuit is a version of the world class NAP 500 with a substantial and very quiet power supply using a custom-designed and manufactured toroidal transformer. Improvements over its predecessor, the NAP 150, include: a new toroidal transformer for improved regulation; separate windings for each channel and preamp; and an up-rated preamp power supply to improve the performance of the preamp.
| Input Impedance | 18kΩ |
| Analogue Input | 1 x 4-pin DIN |
| Signal-to-Noise Ratio | 100dB |
| THD | 0.01% |
| Minimum Load Impedance | 2Ω |
| Power Outputs | Naim pre-amplifier |
| Frequency Response | -3dB at 3Hz - 50kHz |
| Gain | +29dB |
| Case | Black powder coated |
| Front | Brushed and black anodised |
| Shipping Dimensions | 200 x 590 x 500 mm |
| Weight | 7.9 kg |
| Dimensions (HxWxD) | 70 x 432 x 301 mm |
| Mains Supply | 100V, 115V, 230V; 50 or 60Hz |
| Power Consumption | 330VA (max.) |
| Power Consumption (quiescent) | 16VA |
| Power Output | 60W/channel, 8Ω |
| Transient | 260VA |
| Speaker Outputs | L & R, 4mm “banana” sockets |
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