In/Outputs
All the subwoofers features speaker level inputs if there is lack of a line level/LFE
level output on the amplifier/receiver.
All subwoofers also have both left and right line level input in case of stereo
sources and a loop through capability, i.e case the signal needs to be routed
through to a second subwoofer.
The SUB 650 also features a 12V trigger, allowing it to be turned on
automatically together with the receiver/controller if the receiver/controller has
the presence of such an output.
Drivers
The drivers used throughout the sub series are constructed with heavy magnet
systems , long VCs and very stiff paper membranes.
This enables a very fast attack and a high degree of control.
Sub 250
For the SUB 250 the woofer is an 8” driver with an
Ø 38mm 4-layer voice coil with an X-max at +/-10mm allowing for high
excursions. The heavy magnet system features a vented pole piece in order to
avoid over/under pressure behind the dust cap (mechanical damping) when
the cone is moving.
Sub 450 & 550
For the SUB 450 & 550 a 10” driver is chosen.
The driver features an Ø 38mm 4-layer voice coil with an X-max at +/-15mm
allowing for high excursions. The heavy magnet system features a vented pole
piece in order to avoid over/under pressure behind the dust cap (mechanical
damping) when the cone is moving.
Sub 650
For the SUB 650 a 12” driver is chosen . The driver features an Ø 50mm, 4-layer
voice coil with an X-max at +/- 18mm allowing for high excursions. The heavy
magnet system features a vented pole piece in order to avoid over/under
pressure behind the dust cap (mechanical damping) when the cone is moving.
Cabinets
All subwoofer cabinets are made of heavy MDF board, a solid and resonance
dead base for the drivers to work in.
However, the
S
lotted
B
ass reflex
P
ort is probably the most remarkable feature
of the SUB 250, 450 and 550 cabinets.
The slotted port is an integral part of the construction, which braces the
surfaces, making the overall construction extremely rigid.
The
S
lotted
B
ass reflex
P
ort is very long allowing a low tuning frequency
together with a large radiating area compared to a conventional round port,
giving a high efficiency and low distortion.