Curvi-BMR

CURVI HIFI UNIQUE SPEAKERS

description

The Curvi Model 1v2 launched in 2010 is iconic and has been quite influential in shaping other
designs. In the latest incarnation, a 128 mm balanced mode radiator (BMR) drive unit replaces the
Jordan JX92S contro-flex full-range aluminium drive unit. Whilst the original attracted critical
acclaim, the new model improves on the original in all key areas. The improvements in dynamics,
increased detail, off-axis performance, tonal accuracy and transient reproduction are due to the
benefits of BMR technology over the contro-flex approach. Improvements in bass reproduction, i.e.
greater speed/slam and extension are due to a modified interface between the drive unit and the
transmission line and a 197% increase in the radiating area, relative to the JX92S.

All the benefits of the laminated birch plywood cabinet are retained, though the some reworking of
the cabinet is needed to accommodate the larger chassis of the 128 mm BMR drive unit. A bezel
(attached viscoelastically and not user removable) hides the drive unit mounting hardware and
streamlines the interface between the roll surround of the drive unit and the cabinet. The bezel can
be machined from variety of materials and is available in a range of finishes. Birch plywood and
acrylic (any colour available) are the standard options. The standard cabinet finish is semi-matt
hand-rubbed acrylic lacquer.

The BMR drive unit selected is the largest available and has been customised for the Curvi – the logo
roundel is airbrush stencilled in acrylic paint. The baffle step equalisation network is point to point
wired. The components used are from Mundorf and include a bonded 1.4 mm wire air-core
inductor, oil enhanced capacitor and metal oxide resistor. Even though these components are
constructed to minimise microphonic effects, they are nevertheless compliantly mounted on the
board and the board itself is compliantly attached to the cabinet. The internal wiring is supplied by
Gekko cables and is insulated with cotton cellulose fibres. The Swiss instrument grade 4 mm sockets
are gold plated. The slate base is fitted with M6 threaded inserts, 35 mm black chrome spikes are supplied as standard, however 3rd party isolation feet (such as those from Track Audio) can be recommended in some installations.

specifications

Bandwidth (-6 dB) quasi-anechoic

60 Hz to >20 kHz (note that the in-room bass extension experienced is much lower than 60 Hz and is dependent of room dimensions and loudspeaker positioning in the room)

Sensitivity (2.83 V RMS @1 m)

85 dB

Impedance

5.0 Ohm at 20 Hz, 9.5 Ohm at 1 kHz

Maximum dimensions including base (HxWxD)

1.000 m x 0.230 m x 0.450 m

Weight

24 kg

Room positioning

0.3 to 1 m from wall boundaries, depending on listening room size/proportions and user-preference.

Enclosure alignment

Curved transmission line

Input connectors

Gold plated 4 mm sockets

Recommended amplifier power

30 W to 150 W

Recommended amplifier power

30 W to 150 W

Contact for more information:

CHRIS LIAUW

Designer of the Curvi speakers

chris.liauw.curvi.hifi@googlemail.com