Seconda (2011) - Hi

Seconda (2011) - Hi
Seconda (2011)
Opera Loudspeakers is one of the few manufacturers that uses the closed box to
load the woofer. The new Opera Seconda, after the success of its predecessors, is
a two-and-a-half-way floorstanding system that still uses a sealed box, but it has
been completely updated. The cabinet structure, drivers and crossovers are totally
new.
Drivers
The new 7” woofer is a custom design made by Scanspeak for the entirely new
Classica series. This woofer has excellent performance in the mid-frequencies; so
much so that it is used as a midrange in the Quinta model. It is equipped with an
aluminium diaphragm, a 38 mm coil (two-layer, CCWA wire) with aluminium former
immersed in a suitably shaped air gap. There is also a metal ring around the pole
piece to control the flux variations. The basket is die-cast for maximum stiffness.
Compared to its predecessor, the volume displacement is increased by a very
significant 10%. The rigid aluminium diaphragm is free from sub-harmonics from
transverse modes and perfectly reproduces the lower frequencies. The two
woofers, connected in parallel, share the same 40 litre enclosed volume.
The tweeter, a D26 series model made by Scanspeak, has a one inch high quality
treated soft dome, double magnet, decompression chamber, ferrofluid, aluminum
flange and a one mm. peak to peak linear excursion (twice as much as a
conventional tweeter). The frequency response extends to 30kHz (0 dB) and 40 kHz
is reproduced (-6 dB). The resonant frequency is about 860 Hz which makes this
tweeter insensitive to vibrations from other loudspeakers (due to the heavy 30 mm
MDF
used
on
the
front
panel).
Crossover
The crossover circuit of this two-and-a-half-way design is divided into two different
boards placed at a suitable distance from each other to reduce the effects of the
mutual inductance of the coils. The tweeter high-pass section is designed to
minimize the microphonic effect (something that is rarely done in other designs).
The capacitors used in the signal path have been carefully selected. This also
contributes to the stability of the virtual central channel to create a stable and
precise soundstage.
Cabinet
The cabinet follows the curvature of the upper section of our flagship Malibran
model. The front panel, made from 30 mm thick MDF, is wide enough to
accommodate the loudspeaker drivers, and has rounded edges that are covered
in leather which also acts as a seal for the speaker enclosure. The sides of the
cabinet are veneered with real wood and finely polished. The structure is further
stiffened by internal bracing. Inside the cabinet there is two layers of pyramidal
shaped, 10 cm thick, polyurethane which absorbs the rear radiation of the
woofers. As a consequence, consistency and clarity are the hallmarks of the sound
of this speaker. The Opera Seconda is also equipped with strong iron bars for
wheels or spikes.
The four external connectors (the Seconda is designed for bi-wiring) are traditional
gold-plated brass connectors, which is the same for all Opera speakers including
our top models. They accept any kind of termination, providing a safe and
effective electrical and mechanical contact.
The insensitivity of the closed box system to sub-sonic frequencies makes our
diffusers especially suited to the reproduction of analog records (LPs). The Opera
Seconda is also suited to be used as front and/or rear channel in home theater
systems: with two pairs of Opera Seconda you can get an Home Theater System
t h a t r e q u i r e s n o c e n t e r c h a n n e l a n d n o s u b - w o o f e r.
Particular attention has been paid to the electrical impedance curve to get a
diffuser less sensitive to the quality of the cables and amplifier (tube or solid state).
Opera Seconda is a true 4 ohm nominal impedance system that meets the DIN
45500 standards (minimum impedance greater than 3.2 ohms) that can be driven
by any amplifier suited for 4 ohm nominal load.
Opera Seconda has a final diffuser; with full extension of the low frequency, it is
capable of reproducing large volumes of sound. It is also easy to place in a room,
with its clear and defined midrange and high frequency reproduction typical of
our top speakers.
This new model replaces the old Opera Seconda, which gained a favourable
opinion world-wide (it enjoys a HiFi Choice "Best Buy" and an Audio Art "Best
Recommended" rating). We are sure that this new high-quality version will gain an
equal or even higher level of success.
Technical Specifications
System:
Loudspeakers:
Number of ways:
Frequecy
response:
Cross-over:
Crossover
frequency
Power:
Amplifier:
Sensitivity:
Nominal
Impedance:
Position in the
room:
Size :
Net Weight:
Floor-standing column - Closed box
2 7” woofer - Aluminium cone
1 1” Scanspeak Tweeter D26, Silk,
decompressed, Magnetic fluid.
Two-and-a-half
30-30000 Hz
Woofer: 12 dB low pass
Tweeter : 12 dB high pass
2200 Hz approx
140 watt RMS
From 10 to 200 Watt RMS or more –
without Clipping
89 dB/2.83Vrms/1 meter
4 ohm (minimum > 3.2)
away from corners
102 x 24.5 x 43 cm 40 x 9.5 x 17 inches
(HxWxD)
45 Kg 100 lbs
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement