Naim NAP 90/2 Power Amplifier (1989)

A super “Olive” finish NAP 90/2 power amplifier from British specialist Naim Audio. Originally launched way back in 1987 in the half width case with the chrome bumper finish, this was changed in 1989 to the “Olive” finish as we have here, then later into the full width slimline case. Today, this is still a very highly regarded amplifier, and seen as the first step onto Naim hierarchy ladder. It was recently serviced and is in very good condition, with just a couple of minor blemishes to the casework – please see photographs. It will be professionally packaged and comes with, SNAIC cable, manual, service report and our standard three month warranty.
Full re-cap, service and alignment
Naim Say….
The smallest power amplifier in our range, the NAP 90 compliments Naim’s other components with a performance that belies its size. rated at 30 watts into 8 ohms and up to 150VA transient power, the low noise and stability of the NAP 90 is made possible by a large toroidal transformer and careful earthing and circuit design. Despite its apparently conservative power output there are few loudspeakers that this amplifier will not drive with authority and control.
The purpose of an audio amplifier is to drive loudspeakers without loss of musical information. In our view many commonly accepted parameters have little to do with loss of information and in some instances, such as the pursuit of large bandwidths or low distortion, unqualified acceptance of them can actually lead to the creation of mechanisms that bring such losses about. Dynamic output impedance, open loop bandwidth, slew rate, propagation delay and stability margins are only some of the many factors to which we attach Importance, and which must all be brought into positive balance.
With this balance in view, our amplifiers not only achieve low harmonic distortion, low noise, and wide power bandwidth, but also have a constant dynamic output impedance over the whole audio bandwidth. They are able to drive reactive loads without any appreciable change in distortion and are not sensitive to the absolute impedance of the load.
The amplifiers will tolerate any load from O ohms to infinity without damage or instability, the output stages being protected by circuitry that measures the power dissipated.
The cases of the power amplifiers are all constructed in a similar way, using a heavy aluminium extrusion, which acts as a heatsink, to form the outer cover for an inner chassis inside which the entire amplifier is assembled. All connections are on the rear. All the amplifiers have large toroidal mains transformers. The NAP 90 uses one diode bridge and one pair of smoothing capacitors. The NAP 90 has a built-in 24V regulated supply to power Naim Audio pre-amplifiers via a SNAIC-4 interconnect cable. High quality components are used throughout, with great attention to detail construction. Many components are specially selected or manufactured to our own specification.
Specifications:
Power Output: 30 W onto 8 Ω
Transient 125 VA: Voltage Gain + 29 dB
Input Impedance: 18 kΩ
Frequency Response: – 3 dB at 5 Hz & 40 kHz
Mains Supply: 100 V, 115 V, 239 V; 50 or 60 Hz
Dimensions: 205 (W) x 300 (D) x 76 (H) mm