Matrix Elements VB-800 Field Manual page 5

GETTING STARTED AND POWERING UP:
Your VB-800 amplifier comes equipped with a power lead specific for the
requirements of your country. Use only the correct lead with the correct
rated fuse for your countrys' power requirements. Use of an incorrect lead
or fuse rating could lead to damage of your amplifier.
NOTE: Unlike a Valve powered amplifier, it is not necessary to connect a
speaker (or load) to the amp whilst it is powered on. Powering on or
operation of the amp without a speaker or load attached will NOT damage
the amplifier.
1.Connect the supplied mains power lead to the IEC inlet on the rear of
the amp.
2. Connect the amplifier to a speaker or cabinet with a good quality
speaker cable. Never use a screened (shielded) guitar cable for this as you
may damage the cable and the amplifier. Whilst the VB-800 has been
designed for use with any standard guitar speaker cabinet available, we
recommend use with the Matrix NL series of lightweight cabinets. The VB-
800 will accept various impedance cabinets but bear in mind that the
total load must NOT exceed 4 ohms. (for more information on impedance
see page 5)
3. Making sure that the Main Volume of the amp is turned all the way
down, power on the amplifier via the power switch located on the front of
the amp. (you may hear a slight "thump" as the unit is powered on. This
is perfectly normal)
4. Connect a guitar or suitable instrument to the front of the amplifier
using either the High or Low inputs.
5. Adjust the controls of the amp to a required level and steadily increase
the main volume until a sufficient level is achieved.
NOTE: The signal light next to the main volume gives an indication of how
much power the amplifier is outputting at a given impedance. Typically the
light will start illuminating (blinking) at 12.5% (-9db) of the amplifiers
total power. For a 4 ohm load this equates to approximately 50 watts
output. For an 8 ohm load attached, 35 watts and for a 16 ohm load, 20
watts. When the signal light stays on solidly, this equates to 25% of the
amplifiers total power so for a 4 ohm load, that is 105 watts, for an 8
ohm load, 75 watts and for a 16 ohm load, 40 watts. Using this is a
useful guide to avoiding possible damage to your speakers.
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