M-8S - MERIT SERIES PowER CondITIonER • EnGLISH
3
FEATURES (Continued)
Sequenced Outlets
Most sound reinforcement professionals realize the
majority of equipment damage occurs while devices
are either powered up or powered down. Power
sequencing allows A/V equipment to be powered
up in stages which gives equipment time to sta-
bilize before the next stage of equipment is ener-
gized. When powering down, the sequence order
is reversed, which results in a soft landing for your
expensive AV equipment.
Although there are many benefits to power sequenc-
ing, perhaps the most well-known is the elimination
of “Speaker Pop”. Speaker Pop is the loud popping
noise that occurs when AV components are pow-
ered up simultaneously or out of sequence. Most
people have experienced Speaker Pop. In addition
to being extremely unsettling, Speaker Pop can
stress or damage sound system components such
as amplifiers and speakers. By delaying the activa-
tion of the amplifiers until the low level equipment
has had the opportunity to stabilize, Speaker Pop is
virtually eliminated.
Power Sequencing is also useful in preventing nui-
sance breaker trips. Amplifiers can have very high
in-rush currents at power up. If multiple amplifiers
are activated simultaneously, the in-rush currents
sum together and can exceed the capacity of the
branch circuit which can cause the circuit breaker
to trip. The Furman M-8S prevents breaker trips by
sequencing (offsetting) power activations over time.
This offset sequence allows transient load currents
to occur over several seconds rather than all at
once, which prevents nuisance breaker trips.
The turn-on delay intervals are factory preset to 5
seconds per stage. This delay can be increased or
decreased using the rear panel trim pot adjustment
(see “Adjusting the Delay Interval” for details).
In the event of a power outage, all equipment
plugged into an M-8S will lose power simultaneously.
When power is restored, the behavior of the M-8S
will depend upon switch settings and how the unit
has been configured:
• If the M-8S has been configured for Maintained
mode and the Sequence switch is in the ON posi-
tion, the delayed outlet groups will turn on in the
normal delayed sequence order when power is
restored.
• If the M-8S has been configured for Momentary
mode the delay outlets will remain off until activated
by the end user.
Merit Class Surge Protection
The M-8S features Furman’s Merit Line to Neutral
Surge protection and RFI/EMI filtration. The Merit
filter is designed to dissipate voltage transients and
protect your equipment from surge events. The
M-8S is also equipped with a Protection OK LED
which provides a visual indication that the M-8S’
surge protection circuit is operational.
Thermal Circuit Breaker
Resettable 15 Amp circut breaker.
Sequence On/Off Switch:
The front panel sequence on/off switch sequentially
powers on and off the DELAY 1, 2, and 3 outlets.
The front and rear panel UNSWITCHED outlets are
always on when power is applied to the M-8S.
