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Subwoofer – Satellite – Center<br />
STONEHENGE<br />
METEOR . HELIOS
SUBWOOFER<br />
STONEHENGE<br />
Bass-Principle<br />
The subwoofer Stonehenge is<br />
a high-power low frequency<br />
active subwoofer based on the<br />
bass-reflex principle. The woo-<br />
fer is firing upwards against a<br />
massive stone and the bassre-<br />
flex vents are firing down<br />
against the floor. By these re-<br />
flecting planes the radiation<br />
impedance is increased and the<br />
radiation of sound into the<br />
room becomes very even. The<br />
floor is amplifying the low fre-<br />
quencies of the vents (20 40 Hz).<br />
While in many rooms a roaring<br />
at 70-80 Hz is generated when<br />
the sound is radiated via the<br />
floor the woofer working in<br />
this frequency region is placed<br />
at the top of Stonehenge. It is<br />
therefore at a height of 70 cm<br />
(28“) where those resonances<br />
can hardly be excited.<br />
The Stonehenge impresses you<br />
with a deep, black and very con-<br />
trolled bass even in small<br />
rooms.<br />
Stonehenge – one Subwoofer for all<br />
applications and purposes<br />
STONEHENGE. The Stonehenge is an active<br />
Subwoofer with a built-in amplifier<br />
and an active control unit. Because of its<br />
active low-pass crossover which can be<br />
switched between 6 frequencies ( 50 –<br />
150 Hz) the Stonehenge is universally<br />
applicable and can be matched to every<br />
loudspeaker. It has a volume control and<br />
its phase can be switched to 0° or 180°.<br />
With its four inputs for front left and<br />
right, center and LFE-channel it can be<br />
used as a subwoofer for bass only (LFE),<br />
stereo (front left and right) or for a com-<br />
The woofer of Stonehenge<br />
The active control unit<br />
plete multi-channel system consisting<br />
of 5 Meteors (front, center and LFE) as<br />
one normally doesn’t need a sub for the<br />
rears. The Stonehenge goes down<br />
linearly to 21 Hz and is then cut off sharply<br />
to reduce subsonic noise or artificial<br />
signals. The woofer is a 12” doublemagnet<br />
high-excursion driver with a diecast<br />
basket and a very stiff honeycomb<br />
diaphragm. The low bass (20 to 40 Hz) is<br />
generated by two down-firing bassreflex<br />
vents. Thus a very high sound<br />
pressure level of 108 dB can be reached.
HELIOS. The <strong>Isophon</strong> Helios is our midsize<br />
centerspeaker which can be combined<br />
with all our frontspeakers as it has<br />
the same midrange and tweeter and<br />
identical filters. These two drivers harmonize<br />
perfectly resulting in this light,<br />
transparent <strong>Isophon</strong> sound which shows<br />
no sharpness or aggressiveness.<br />
The midrange and tweeter are mounted<br />
vertcially above each other. Helios is<br />
therefore excellently suited for all lateral<br />
listeners which are not sitting in the<br />
sweet spot. Its frequency response under<br />
30 degrees lateral angle is nearly the<br />
METEOR. As all our speakers have the<br />
crossover frequency of 130 to 150 Hz<br />
between bass and midrange the idea<br />
lies near to split up these two systems<br />
into two separate enclosures thus creating<br />
a satellite-subwoofer-system. The<br />
satellite can be very small as the required<br />
cabinet size is only 3.5 litres of our<br />
midrange driver and tweeter. Such a<br />
system would possess all the advantages<br />
of our speakers as the same drivers,<br />
crossover and time-delay is used.<br />
Starting from 110 Hz and being highpass<br />
filtered the Meteor is a satellite<br />
with a very high resolution and dynamics<br />
though being very small in size.<br />
same as on axis. So, you have a very<br />
large listening area. In order to reduce<br />
the height the tweeter is directly mounted<br />
to the aluminum front-plate thus coming<br />
closer to the midrange driver. In<br />
combination with the time-delay circuitry<br />
a very small acoustical center is<br />
achieved. This point is especially important<br />
for a precise and natural reproduction<br />
of voices.<br />
The Helios has a single-wiring WBT-terminal<br />
on its back for an excellent contact<br />
to all cables and connectors. As with all<br />
our speakers a cloth-grille is available.<br />
Subwoofer – Satellite – Center<br />
HELIOS<br />
METEOR<br />
The midrangetweeter<br />
unit<br />
Meteor and Helios own the sa-<br />
me midrange driver and twee-<br />
ter including the filtering we<br />
use in all our stereo speakers.<br />
Of course they are also working<br />
with our famous time-delay<br />
circuit which delays the<br />
tweeter to coincide with the<br />
midrange.<br />
These two drivers harmonize<br />
perfectly giving this isophontypical<br />
brilliant, pleasant sound<br />
with no harshness. This is<br />
essential for a long joy of listening.<br />
The bass-principle of<br />
Helios<br />
To combine a small cabinet<br />
size with the demand of high<br />
power capability we made a<br />
new bass design for Helios:<br />
a symmetrical, double-vented<br />
bandpass of 8th order with a<br />
push-pull-driver alignment.<br />
The push-pull technique reduces<br />
the cabinet size by a factor<br />
of 2 and allows higher power<br />
for the system as two long-excursion<br />
woofers work inside.<br />
Therefore you don’t need any<br />
filtering for the Helios even<br />
though its size is very pleasant.<br />
STONEHENGE<br />
METEOR . HELIOS
Technical Specifications<br />
Woofer:<br />
2 x 170 mm<br />
Midrange:<br />
1 x 120 mm<br />
Tweeter:<br />
1 x 25 mm<br />
Bass-principle: Double-vented<br />
Bandpass in Push-<br />
Pull-Alignment<br />
Crossover Frequency: 115/3400 Hz<br />
Impedance (Ohm): 4<br />
Sine Power:<br />
120<br />
Impulse Power: 220<br />
Height (cm):<br />
Width (cm):<br />
Depth (cm):<br />
Weight (kg):<br />
Helios Meteor Stonehenge<br />
24,5<br />
48<br />
36<br />
15<br />
–<br />
1 x 120 mm<br />
1 x 25 mm<br />
High-pass Filter<br />
from 110 Hz<br />
110/3400 Hz<br />
4<br />
100<br />
190<br />
26<br />
16,2<br />
19,5<br />
Subwoofer – Satellite – Center<br />
4<br />
1 x 320 mm<br />
–<br />
–<br />
Bass-reflex<br />
switchable<br />
active<br />
400 Watts active<br />
–<br />
Combining Meteor, Stonehenge and Helios the following multi-channel systems<br />
can be generated:<br />
Enclosure Finishes<br />
ash<br />
■ 2 Meteors, 1 Stonehenge for stereo<br />
■ 4 Meteors as front- and rearspeakers, 1 Helios as center and 1<br />
Stonehenge providing the bass for all 2 Meteors (front), 1 Meteor (rear)<br />
and LFE.<br />
■ 5 Meteors as front-, center- and rearspeakers, 1 Stonehenge providing<br />
bass for front, center and LFE.<br />
■ 3 Meteors as center- and rearspeakers, 2 <strong>Isophon</strong> frontspeakers<br />
(Galileo, Enigma, Vieta, Europa), 1 Stonehenge providing bass for rear,<br />
center and LFE.<br />
Meteor can be delivered magnetically shielded (no additional costs). Sound is<br />
slightly influenced.<br />
aluminum<br />
isophon Stonehenge, Meteor and Helios are available in<br />
ash black, ash white and aluminum. Cloth-grilles covering<br />
the front are available on request.<br />
74<br />
34<br />
34<br />
36<br />
Why you make up your mind for<br />
isophon multi-channel systems<br />
■ All our speakers inhibit the same<br />
midrange-driver and tweeter.<br />
They can therefore be combined<br />
in any way.<br />
■ Our centerspeakers Helios and<br />
Solaris have a vertical alignment<br />
of midrange-driver and tweeter<br />
resulting in a very large listening<br />
area without loss of speech<br />
intelligibility.<br />
■ Our Subwoofer Stonehenge has<br />
its unique up-firing/down-firing<br />
technique leading to a very precise<br />
and controlled bass without<br />
bad room excitations.<br />
■ With our rearspeaker Comet we<br />
offer a unique specialist just designed<br />
for rearspeaker purposes.<br />
Switchable between diffuse<br />
(a combination of bipole and<br />
dipole) and direct-radiator mode<br />
it is better suited for music and<br />
movie than conventional loudspeakers.<br />
■ Our centerspeakers have two<br />
inner-drivers for the bass response.<br />
Therefore you can omit<br />
dynamic reducing filters and<br />
drive them in „Large Center“mode.<br />
■ Our subwoofer Stonehenge<br />
offers 4 inputs for providing the<br />
bass response for small frontspeakers<br />
and a small center.<br />
STONEHENGE<br />
METEOR . HELIOS