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SUPERTWEETER – 14kHz-50kHz
The pod mounted SuperTweeter™ uses a specially
developed aluminium alloy and carbon fibre dome
with rare earth magnet and continues the frequency
response to over 50kHz. It is driven by a dedicated
30W IC power amp, and time-aligned to the Dual
Concentric™ over a wide horizontal dispersion
using fourth order Gaussian hi-pass filter and
critical physical positioning. The SuperTweeter™
amplifier bandwidth is up to 80kHz. The crossover
frequency is very high at 14kHz, which is far away
from the midband where sensitive stereo location
information is concentrated. At this frequency it
doesn’t interfere with the main signal from the
Dual Concentric™. Listening at 1 metre on axis
with the HF horn, which is the precise point where
its signal synchronises with the Dual
Concentric™, it is not detectable as a
separate source.
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AMPLIFIER MODULE
Behind the elegant cast multi-fingered heatsink,
which has 60% higher efficiency than a vaned
heatsink of equivalent size, lies the surface-mount
PCB. The circuit carries 20 ultra-low distortion, low-
noise audio op-amps, which provide comprehensive
Analogue Signal Processing and power amplifier
driver stages. LF and HF bands have identical
design 150W or 200W discrete mosfet power
amps. The SuperTweeter™ is powered by a
monolithic 30W wide bandwidth amplifier, which
gives ample headroom for the minute signal in this
audio band. The ASP used comprises high and low
order frequency dividing networks, fixed and variable
equalisation, and high Q inductive/capacitive
correction filters. There is no compression or limiting
on board, to preserve dynamics. The system can
be driven into clipping, and damage can result
from abuse, but it’s a system
designed for professionals
who want to hear the true
dynamics of their work.
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XLR BALANCED INPUT
A variable gain instrumentation amplifier input
stage with high CMRR is used, with local
grounding and high RFI rejection.
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RESILIENT BASE
Secure mounting is provided by the detachable
neoprene base, which effectively dampens any
vibration between the loudspeaker and the
stand or platform support. Remove the base
and a standard Omnimount wall bracket can
be used as an option.
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MAINS INLET MODULE
A four-in-one mains inlet comprising earthed
6A IEC socket, on-off switch, fuseholder, and
voltage selector.
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