I32 two channel integrated amplifierThe I32 is an
upgradable two x 120 watt integrated amplifier utilising proprietary
UFPD power technology. It is designed to provide high power output with
very low distortion and system control for Primares new 30
series range of hi-fi separates. UFPDs instantaneous rise time results
in a naturally fast, clean and agile sound over a much wider
frequency range and with exceptional headroom. Ecologically the I32 is
far superior to conventional Class A/B designs being extremely efficient
without generating excessive heat. In addition it provides a special eco-friendly standby mode of just 0.2 W. Audiophile TopologyThe
I32 houses two discrete UFPD amplifiers housed in a heavy gauge alloy
steel chassis, which provides strength, rigidity, and screening, while
being effective at damping vibrations from external sources.
To reduce distortion the pre-amp section is isolated from the power
section as far as possible, being fed by a dedicated power supply. The I32
incorporates 2 pairs (L, R) of low-noise balanced XLR inputs and 3 pairs
of RCA inputs. There are 2 pairs of RCA outputs: pre-out and record.
There will also be the option of an upgrade board offering MEDIA/streaming connections like USB, iPod, LAN All
signal paths are as short as possible and all signal treatments (source
selection, volume and channel balance trims) are performed purely in
the analogue domain. Unbalanced inputs are converted to
balanced signals by a conversion stage buffered by the excellent
sounding Burr Brown OPA2134 op-amps and fed to volume and balance controls
employing closely matched LM1972 attenuators in a balanced
configuration. Source selection is via high performance signal relays. Ultra Fast Power Device (UFPD) Class-D AmplifierThe
use of switch mode power electronics is gaining in popularity as the
result of its lower energy consumption and as a way to squeeze more
amplifier channels into smaller spaces. Unfortunately Class D
amplifiers and their switch mode power supplies have traditionally
deserved a reputation for poor audio quality, characterised by rising
THD with frequency. Primares UFPD (Ultra Fast Power Device)
technology provides for the possibilities of a full-range audiophile
Class D design. It is a Class D technology which has a
consistent 26dB feedback loop gain across the entire audio bandwidth and
is stable way beyond the audible frequencies. This is quite easy to
achieve in conventional linear continuous signal amplifiers, but much more difficult in non-continuous high speed switching amplifiers. Rather
than have the amplifier and then the filter as discrete stages, the
UFPD design integrates the two, making control with feedback much more
immediate and accurate. The UFPD amplifier actively adapts the
loop gain to keep the total loop stable during start up, clipping and
current limit. It senses the changes to the filter output and
compensates by applying the precise amount of feedback. This adaptive
pole control allows for several more dBs of constant loop gain across
the audio band and maintains performance irrespective of load
(impedance) variations. Primares UFPD treats all signals equally
regardless of frequency or slew rate and has the ability to suppress the
filter resonance entirely. Consequently THD is kept very low at all
frequencies. With a very wide load independent frequency response UFPD
is able to drive any speaker while maintaining control and accuracy.
Primare has optimised the performance of its innovative UFPD design with
the precise selection of circuit component values and quality,
verifying the design with extensive measurement and listening. PFC Power SupplyAlthough
switch mode power supplies have gained a reputation for noise and
unreliability, the theoretical advantages of the design are well known.
The rails can be regulated with precision and current demand from the
mains is lower as the result of high efficiency and the absence of
current spikes: energy is taken from the mains over a larger
period of the sine wave. 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. Ultra low-power standby The I32 incorporates a very low power eco mode for standby. Power consumption is just 0.2W. Upgradable DesignA
media upgrade will be available, which offers up to 24 bit/192 kHz
streaming of files from Internet, NAS or PCs; Internet radio content and
also digital audio input from arange of devices including CD players, smart phones, personal players, sat boxes etc. See spec for full list of inputs/outputs.


Denumiri similare la Amplificator Primare MM30: MM 30

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