User manual FENDER M12 MIXER

[. . . ] Employing a unique design, the M12 MIXER provides a powerful tonal control system which fights feedback while optimizing sound. This design is comprised of a sweepable high pass filter, a sweepable low pass filter and three advanced narrow band notch filters. This manual is arranged into four sections: A description of the M12 MIXER panel features. Product specification sheet. 3 DESCRIPTION OF FEATURES E F INPUT LEVEL +6dB LOW NOTCH DEPTH 0dB MID NOTCH DEPTH 0dB 2k -3 4k -6 HIGH NOTCH DEPTH 0dB 4k -3 9k -6 16 60 POWER 120 ON 225 0dB 70 430 -3 700 -6 1k FLAT 150 LOW FREQ. [. . . ] If set fully counter clockwise, only signals below 2. 5 kHz will be 4 I permitted to pass through. If the performers complain of "edgy" sounding monitors and want smoother sounding ones, rotate this control counter clockwise until they are pleased with the sound. LOW FREQUENCY ROLL OFF CONTROL (HIGH PASS FILTER) - Useful for removing rumble (mechanical noise) or resonance and L. F. When this knob is fully in its counter clockwise position, all input signals above 12Hz are allowed to pass. When it is positioned fully clockwise, only frequencies above 150 Hz are permitted to enter the power amplifier. If the performers want crisper sounding sounding monitors slowly rotate this control clockwise until they are pleased with the sound. POWER LED INDICATOR - LED is illuminated when the monitor amplifier is turned on, and the AC mains voltage is present. If the indicator does not light when the power switch is turned on (and does not trip the circuit breaker), check the AC power supply and fuse. DELTACOMPTM SWITCH - This switch activates the internal compressor circuit. This will also "clamp" feedback, helping protect your monitor speakers. During normal operation, keep this switch engaged. DO NOT BLOCK FAN OPENING TYPE: PR 308 OUTPUTS SERIAL NUMBER PATCH POINT RETURN SEND BALANCED INPUTS PARALLEL SPKR. Larger diameter (small gauge number) wire is expensive and long cables made from it are heavy. Rather than running long speaker cables, it is better to locate power amplifiers near speakers and run a line-level signal cable over the long distance to the amplifier. This approach eliminates most of the signal loss due to speaker cable resistance so the speakers are fed all of the amplifier's power without the need for heavy cables. In cases where speakers and power amplifiers are located far away from the signal source, "balanced line" cables are a wise choice. The use of stranded wire is highly recommended since it is flexible and less prone to metal fatigue breakage. If an end is nicked while insulation is being stripped for connection, only one or two strands will break and not the entire wire. Coiled guitar-type cords usually have higher internal resistance than the speakers themselves. This is due to the light-gauge wire used to keep the coil cords flexible. Unfortunately, these types of cord prevent most of the power from reaching the speakers. In high power operation, a coil cord can melt causing a fire hazard and possible damage to the amplifier. As a general rule, both straight and coiled guitar-type connecting cords make poor speaker cables. [. . . ] The effect of small AC lines is one of the intermittent clipping under severe conditions. 8. If feedback is encountered, slide the appropriate (LOW, MED or HIGH band) notch depth control down to its lowest position. Next, turn the frequency control knob to pinpoint the location of the problem frequency and cancel it. Slide the control level up until feedback or ringing is heard, then move down until the feedback or ringing stops. [. . . ]