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IGNAL

CONNECTIONS

The Tornado Series was developed using high qual-
ity interconnects and speaker cables from Merlin
Cables, these allow the ampliﬁers to operate as
intended and deliver their optimum performance. We
strongly recommend that you use these cables for all
connections. You can obtain these from your dealer
or distributor..

Please note that we particularly advise you not to
use solid core interconnect or speaker cables, or any
type of high capacitance speaker cables. We further
suggest that you use short cable runs. Try to keep
interconnects to 2 metres/6 feet or less and speaker
cable runs below 10 metres/30 feet. Even though
a Tornado ampliﬁer will drive longer speaker cables
you will ﬁnd its performance improves with shorter
cables. The use of “litz” or “goertz” type cables may
cause your ampliﬁer to overheat under certain cir-
cumstances. These are best avoided.

EAR

ANEL

A diagram can be found on page 6 of this manual.

AINS

CONNECTIONS

The Tornado’s mains switch is ﬁtted on the left of the
rear panel (when viewed from the rear). Use this to
switch off the ampliﬁer completely. Next to it is an
IEC socket into which the supplied mains lead ﬁts. If
an internal fuse should blow i.e. the blue LED will not
illuminate when the ampliﬁer is not hot but plugged
in and switched on, then the ampliﬁer should be
returned to your dealer for examination. Any replace-
ment should only be of an identical type.

The ampliﬁer, whilst powered ON, will be warm to
the touch even as idle, due to the class A quiescent
current ﬂowing in the output stage. This is perfectly
normal.

NPUT

CONNECTIONS

The input sockets for the Tornado are either RCA
phono or XLR balanced. Connect your pre-am-
pliﬁer’s main audio outputs to these. Use the rear
mounted switch to select the input type that you
have connected to. The switch points towards the
input selected. Left and right are clearly marked, see
rear panel diagram.

PEAKER

CONNECTIONS

Gold plated 5-way binding posts are provided for
your speakers. The red terminal is the positive con-
nection and the black terminal is negative. If you use
bare cables or spade terminals that require clamping
in the binding posts, be sure to arrange the leads
so that they do not short-circuit the ampliﬁer. Clamp
the connections tightly but do not over-tighten them:
do not, for instance, tighten the binding posts with

pliers. Check this sort of connection periodically to
make sure that the wire is still tightly gripped. Better
still, use high quality cables factory ﬁtted with appro-
priate plugs! The uppermost pair is for the left chan-
nel, whilst the bottom pair is for the right channel.

Tornado ampliﬁers are suitable for use with most cur-
rent loudspeaker systems with an impedance rating
between 4 and 16 Ohms. Contact your dealer if you
have a particularly unusual loudspeaker system and
are uncertain about how your ampliﬁer might react
to it. Under all normal circumstances the ampliﬁer is
well protected against encounters with demanding
speakers: it has thermal protection, voltage and cur-
rent limiting and DC offset protection.

UTE

INK

INPUT

This is to allow simultaneous mute control over the
power ampliﬁer when used with a Hurricane pre-
ampliﬁer, just connect using the 3.5mm jack lead
provided with your Hurricane pre-ampliﬁer.

WIRING

Although there are not two sets of speaker terminals
provided, if you intend to bi-wire - or tri-wire - your
loudspeakers, we recommend that you use cables
correctly ﬁtted with a single pair of plugs at the am-
pliﬁer end for four reasons. 1) To bi/tri wire properly
you should have a common ground point. 2) Trying
to squeeze two or three individual cables into a bind-
ing post will give a poor connection that will degrade
sound quality. 3) It increases the likelihood of wiring
one or more of the speaker drive units out of phase
by reversing its connections. 4) It invites accidents
through wires breaking free and shorting the ampliﬁ-
er’s output.

RONT

ANEL

Although there are no front panel controls Connect-
ing the mute link cable between your Hurricane pre-
ampliﬁer (if you have one) will operate internal relays
that connect the audio signal to the loudspeakers
when the mute button on the Hurricane’s front panel
is pressed once. To un-mute press it a second time.
It does not connect the mains supply to the ampliﬁer:
the actual mains power switch is on the rear panel.

If you do not have a Hurricane pre-ampliﬁer then the
Tornado will un-mute itself automatically a few sec-
onds after being powered on.

Leaving the mains supply permanently connected
and silencing the ampliﬁer with the Hurricane’s mute
switch means the Tornado will deliver optimum per-
formance immediately it is brought out of its “stand-
by” state.

When the ampliﬁer’s output is muted the red indica-
tor light on the front panel extinguishes.