Pre/Power Amplifiers

Primare Power
Introduced in 2007, the UFPD (Ultra Fast Power Device) Class D modules at the heart of Primare's power amps are representative of the best of this cool-running analogue technology, inspired by and given 'audiophile credibility' by trailblazers Hypex and its UcD and Ncore units [www.hypex.nl]. Although Primare's UFPD amplifiers are proprietary they share many important features with the single-ended Hypex modules used to great effect in the NAD M10 [HFN Jun '19] and, of course, in Primare's own I15 [HFN Oct '18].

UFPD is a high efficiency, single-ended Class D amp that integrates both the switching and low-pass filter stages within a global feedback scheme. The feedback accommodates different signal conditions, promising a predictable response and distortion regardless of variations in the speaker load impedance. Within its latest UFPD 2 module, Primare has refined the output filter inductor and traded a reduction in amplifier gain for an improvement in gain bandwidth, pushing the response peak out to higher frequencies. The inset Graph shows the A35.2's frequency response into an open circuit (grey) and also 8ohm (black), 4ohm (red), 2ohm (blue) and 1ohm (green) speaker loads where it holds to ±0.1dB from 20Hz-20kHz (note the 1kHz-100kHz scale). PM