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Marshall JCM 800 4104 Combo Amp : Review

Marshall JCM 800 4104 Combo

Front Panel

Power

On/Offr. The maximum consumption is 175 Watts.

Standby

If you need to make a break, use this switch and not the Power. Thanks to the standby function, tubes filaments will continue functioning and will not suffer continuos On/Off. This prolongs tubes life.

Inputs

High sensitivity

0.15mV

Low sensitivity

17mV

Controls

Master Volume

The overall Output. The most important feature is that it doesn't increase the pre volume.

Treble

The high frequencies.

Middle

At high levels, it will affect Bass and Treble too.

Bass

The low frequencies.

Presence

It makes the tone more brilliant.

Tone Range

Treble

10KHz - 32dB

Middle

500Hz - 9.5dB

Bass

50Hz - 15dB

Presence

3KHz - 6dB

Rear panel

Power

This is a very important thing. Choose a value that matches the transformer to the incoming voltage. Read the manual carefully. If you select an incorrect value you can damage the amplifier.

Output

This is the selector to match the transformer impedance to loudspeaker impedance. Like for the power read the manual or you will damage loudspeakers if you don't know what to make.

D.I.

This is an auxiliary and very useful function. You can send the sound produced from the JCM 800 4104 directly in a recorder, in a Mixer or in a slave amplifier.

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