Since purchasing Lake People last April, CMA Audio has adopted many of the circuitry approaches at Niimbus borrowed from Violectric, the brand that CMA took over with Lake People. Amplifier headphone Niimbus US and US 5 5 Pro received completely symmetrical circuit “dual mono” a working supply voltage 50 V from two toroidal transformers capacitors of 50,000 uF and accordingly a high output power.
The company called both flagship models reference – they are ready to work with almost any type of headphones. For this, the pre-amplification adjustment is provided in the range from -18 to +24 dB. Low output impedance guarantees a high attenuation factor.
In balanced connection, both Niimbus models operate in push-pull mode. One balanced and two unbalanced stereo inputs, balanced and unbalanced line outputs will allow the amplifiers to work as a preliminary – the line outputs can be set to either fixed or variable mode.
The differences between the amplifiers are that the US 5 used a motorized potentiometer, while the US 5 Pro uses a volume control connected to a microcomputer, which in turn controls a network of fixed resistors through non-wearing reed relays. This control has 256 discrete volume levels.
Both models received nearly identical metal cases with 10mm anodized aluminum bezels. Their controls are complemented by remote controls in the same style – from a single piece of metal.
The Niimbus US 5 and US 5 Pro headphone amplifiers are manufactured in southern Germany and will go on sale in early August. European prices are € 5,000 for the US 5 and € 5,500 for the US 5 Pro.