MK Sound VX-4 User Manual download pdf (Page 4)

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sources and a 3.5mm headphone jack offer

the only front-panel hookup.

At 16.7kg, the model also exhibits serious

heft. The neatly laid-out rear panel is as

generous as it is clean. There are seven HDMI

inputs and two outputs, both of which are

ARC (Audio Return Channel) compatible.

Curiously, one of the inputs is labelled VCR,

which is clearly a little ridiculous. This

vestigial nomenclature can also be found

on the remote control.

There's also a trio of component inputs,

four legacy phono AV inputs and a Zone 2

analogue output. Digital audio options

include two optical and four coaxial. Should

you feel the need to haul in an external power

pusher, there's also a 7.1 bank of pre-amp

outputs. As is the trend these days, though,

there are no multichannel analogue inputs.

This might just be an issue if you have a

legacy Super Audio CD/DVD-Audio deck.

The receiver is a seven-channel design,

using multi-voltage Class G ampliﬁcation.

It can be conﬁgured as a full 7.1 system,

or as 5.1 with two channels serving a second

zone. Alternatively, users can opt to bi-amp

the front stereo pair in 5.1. For this review, the

AVR750 was run in its 7.1 conﬁguration.

Network entertainment is delivered via

an Ethernet input; there's also a rear-mounted

USB, which when the HDMI inputs are

populated becomes virtually unusable.

External control support includes RS232,

plus 12V and IR triggers, which can

automatically switch on connected kit.

Revamped electronics

While some elements of the AVR750 recall

its antecedents, there have been big changes

beneath the hood. The entire HDMI and video

processing stage is new, sourced from Analog

Devices. This is quite a change from its

predecessor, which featured software

speciﬁcally written in-house by Arcam.

Unfortunately, that bravery led to a number

of reliability issues. In comparison, this

platform appears bulletproof. The receiver's

video switching time has improved, too, and

Taking the top off: inside Arcam's AVR750

The AVR750 employs

a revised and reﬁned

seven-channel Class G

ampliﬁer for 'clean and

tight power delivery'

An Analog Devices 4K

processor enables Ultra HD

passthrough, and upscaling

of hi-def and standard-def

sources to 3,840x2,160

Audio clarity is improved,

says Arcam, by virtue of

an ultra-low-noise pre

ampliﬁer with discrete

electronic volume control

the AVR basically handshakes with every

hot plug as soon as it's powered up, which

dramatically improves overall slickness

and usability. All sources can be upscaled

to 4K resolution.

The supplied CR450 remote is a backlit,

learning zapper. It also comes pre

programmed for other Arcam devices,

and, in time-honoured tradition, button

functionality changes depending on which

source device is selected. A comprehensive

guide to this multi-functionality is provided

in the tutorial booklet.

Despite its high-end designation, the

AVR750 is not a difﬁcult receiver to set up

and optimize. Typically in a home cinema

system, you'll declare all speakers to be

small regardless of their physical size, thereby

allowing the subwoofer to handle lower-

frequency information. However, given the

AVR750's audiophile leanings, this approach

may not always be appropriate; helpfully, you

can elect to conﬁgure the AVR750 for stereo

listening differently.

The Arcam ships with an Auto Speaker

setup calibration mic, which performs the

usual enclosure measurements and room EQ

sleight of hand. You can elect to manually

select which inputs beneﬁt from this

equalisation - ideal if you prefer certain

sources uncoloured. While I preferred the

AVR750 sans EQ in two-channel mode, this

calibration certainly helped multichannel

material. The routine takes a little longer to

complete than rival systems, but positional

accuracy is very good. Inevitably, though, some

further tweaking was done to get the most

agreeable sound balance.

When it comes to a user interface, the

AVR750 offers a utilitarian face to the world. >

HOME CINEMA CHOICE 0C1

Robert Follis Associates Limited - Home Cinema Choice Oct13

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