Primare SPA22 User Manual download pdf (Page 3)

Most Class D technologies display:

• Limited bandwidth

• Peaking frequency response

• Load dependant frequency response

• High output impedance at high frequencies

• High THD at high frequencies

• High noise

PFC Power Supply

In conjunction with UFPD, Primare uses an isolated PFC (Power Factor Control) technology in the power supply,

which controls the current from the mains voltage so that it is a pure sine wave with the same frequency and

phase as the mains voltage. This means that even if 1000W is taken from the mains, other equipment in the room

will not be affected. Its presence becomes virtually invisible to the mains voltage! The isolating stage of the

converter works in a ZVS mode and as a result, the switch flanks contain a lower quantity of harmonics, providing

lower EMI and a clean environment for the amplifiers to work in.

OPERATIONAL VERSATILITY

Almost every parameter in the configuration of the SPA22 can be user defined. Any input can be assigned a

name and associated with any audio and video source. Surround format, trigger activation and input sensitivity

can be specified for the input. Individual levels, speaker types, crossover frequencies and delay configurations

including bass management can be selected for each of the major surround formats. A 140mS global delay

system, with dedicated DSP, is incorporated in order to achieve the best possible picture to sound

synchronisation. For the highest possible installation flexibility, all the SPA22’s functions can be controlled in three

ways: from the front panel, IR or RS232.

INPUTS/OUTPUTS

The SPA22 offers three HDMI v1.3 inputs for audio and video, incorporating a user-selectable audio processing

and bypass function (see Technical Information). HDMI I/O capacity is improved via the video upgrade (see

below). HDMI v1.3 capability is significant because it carries uncompressed multi-channel PCM audio from a Blu-

ray player to the SPA22’s DACs and beyond to the amplifiers and loudspeakers. This means that even without

Primare’s proprietary HD audio board, HD audio in its highest resolution can be processed through the SPA22.

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Primare SPA22 User Manual Page 3