039-047 Speaker Group_v9_CBPFPMSP.indd

039-047 Speaker Group_v9_CBPFPMSP.indd
Two-and-a-half way floorstanding loudspeaker
Made by: Acoustic Energy Ltd, Gloucestershire
Supplied by: Acoustic Energy Ltd
Telephone: 01285 654432
Web: www.acoustic-energy.co.uk
Price: £999
Acoustic Energy
Radiance Two
he Radiance Series sits
just below the Reference
models in Acoustic Energy’s
line-up and is intended
to offer a good proportion of
their abilities at a lower price. The
Radiance Two occupies the centre
of the three-strong range of stereo
designs (a matching subwoofer and
centre channel are also available)
and utilise three drive units in a
two-and-a-half-way configuration.
The two main drivers are 130mm
in diameter and consist of a pressed
alloy cone with matching conical
dust cap, allied to a rubber surround.
Both feature voice-coils wound with
aluminium wire for lightness and
each driver has its own enclosure
with separate port tuning.
Treble is handled by a ring
radiator type tweeter, where the
dome is anchored both around its
edge and in the centre, for better
controlled motion and reduced
distortion. The tweeter is located
in the centre of a newly designed
waveguide that Acoustic Energy calls
the DXT Lens. This is said to control
the unit’s output very precisely to
maximise high frequency dispersion,
improve off-axis performance
and ensure a smooth frequency
response. AE also claims that the
technology used in the three drive
units allows a simple crossover: the
circuit has no resistors at all.
The cabinets of the Radiance
Twos are impressively solid and
surprisingly weighty given the
compact dimensions. The rear
profile is curved in order to minimise
internal standing waves and four
outrigger zinc alloy feet bolt
securely to the base to increase
its footprint and allow easy spike
fitment. Sadly, these are not very
pretty! Cabinet finishes are Natural
and Dark Ash real wood veneers.
sound, as these loudspeakers offer
a sense of authority, scale and
confidence rare at the price.
Although the Lab Report suggests
bass extension is a little limited,
compared to, say, the Monitor
Audios, I never felt this to be so
in practice. Bass was punchy, taut
and superbly detailed, gripping the
fretless bass from the Paul Simon
album by the scruff of the neck, and
capturing the rhythms perfectly.
Most notable, however, was the
astounding clarity and central image
stability conferred onto female
vocalists. With Nanci Griffith playing,
I was immediately brought the
impression of her face, larger than
life, hovering directly between the
cabinets. Backing instrumentation
was expertly arranged behind the
main performers and the treble was
an absolute masterclass in clarity,
detail and superlative crispness.
Sound Quality: 85%
- 100
The weighty nature of the
Radiances’ cabinets proved to be
a surprisingly apt analogy for their
Acoustic Energy claims 89dB sensitivity for
the Radiance 2, which accords with our
pink noise figure of 88.7dB. Nominally of
8ohm impedance, the Radiance Two has a
minimum modulus of 3.7ohm, indicating
that 4ohm nominal is more appropriate.
Impedance phase angles are modest
so EPDR (equivalent peak dissipation
resistance) falls to 2.0ohm at 20Hz and
2.3ohm at a more relevant 470Hz, making
this quite an easy load to drive.
The on-axis frequency response displays
a rising trend, suggesting that best tonal
balance will be heard a little off-axis,
but response errors, 200Hz to 20kHz,
are modest at ±4.1dB and ±3.9dB, and
pair matching first class at ±0.7dB. Bass
extension is fair at 56Hz (–6dB re. 200Hz)
but a gentle initial roll-off from 120Hz
suggests that use near a back wall is
envisaged. The cumulative spectral decay
[see Graph] shows a fast initial energy
decay and well controlled resonances. KH
0. 00
1. 02
- 12
2. 04
- 18
3. 06
- 24
4. 08
- 30
5. 10 msec
Frequency in Hz >>
Sensitivity (SPL/1m/2.83Vrms – Mean/IEC/Music)
90.3dB / 88.7dB / 88.3dB
Impedance modulus min/max (20Hz–20kHz)
3.7ohm @ 198Hz
13.0ohm @ 2.0kHz
Impedance phase min/max (20Hz–20kHz)
–28o @ 6.8kHz
35o @ 954Hz
Pair matching (200Hz–20kHz)
LF/HF extension (–6dB ref 200Hz/10kHz)
56Hz / >40kHz/>40kHz
THD 100Hz/1kHz/10kHz (for 90dB SPL at 1m)
0.3% / 0.2% / 0.1%
Dimensions (HWD)
40 | www.hifinews.co.uk | FEBRUARY 2013
039-047 Speaker Group_v9_CBPFPMSP.indd 40
17/12/12 12:49:53
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