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6

Rack Mounting

Mounting in an EIA standard rack

If multiple high-power amp units are mounted in a rack with poor ventilation, the heat from the amps will cause the
interior of the amp to become very hot, causing the performance of the amps to be impaired. When mounting amps in
a rack, you must make provision for ventilation so that the heat can escape.
When mounting amps in a rack, please attach ventilation panels above and below the amp to allow air circulation.
When doing so, it is necessary for 35% or more of the entire surface area of a 1U size panel to be open.
Air circulation will be even better if the top surface of the rack has ventilation openings.

Ventilation panel

Yamaha provides an optional 1U-size ventilation panel VP1.

Unit: mm

480

44

Mounting four or fewer amps in
an open-backed rack

Install the ventilation panel above the amps, as shown
in the following figure.

Ventilation panel

(attach to the front

or rear of the rack)

Mounting five or more amps, or
when (even with four or fewer
units) the back of the rack cannot
be left open

Install ventilation panels above and below each amp,
as shown in the following figure.

Summary of Contents for C 160

Page 1: ...POWER AMPLIFIER Owner s Manual Mode d emploi Bedienungsanleitung Manual de instrucciónes TEMP PROTECTION POWER ON OFF A B CLIP SIGNAL M ...

Page 2: ... efficiency drive The EEEngine s energy saver low heat generation design has reduced power consump tion to 50 or less and reduced heat generation to 35 or less in field applications compared to Yamaha s previous models and has lead to a reduction in energy cost and to less restrictive installation requirements related to heat generation This owner s manual covers the three models C450 C320 and C16...

Page 3: ...ith the internal circuitry will void the warranty 5 Make sure power is off before making or removing connections Always turn the power OFF prior to connecting or disconnecting cables This is important to prevent dam age to the unit itself as well as other connected equip ment 6 Handle cables carefully Alwaysplugandunplugcables includingtheACcord by gripping the connector not the cord 7 Clean with ...

Page 4: ...otection systems is activated during normal use this indicator lights up and no sound is output The speaker system is actually disconnected from the amplifier outputs when this indicator lights up The protection systems are activated when overheating occurs or a DC voltage is present at the amplifier outputs If the problem is corrected the protection systems deactivate automatically this indicator...

Page 5: ...e on page 4 5 GND terminals This is the grounding screw terminal If hum or noise occurs ground earth the unit via this jack or try connecting it to the chassis of the mixer or preamp etc 1 Volume controls These volume controls allow you to adjust the volume level in 31 steps in the range between dB and 0 dB 2 INPUTS CHANNEL A B Two types of balanced inputs for channels A and B are provided Channel...

Page 6: ...DGE MAX OUTPUT 450W 4Ω STEREO MAX OUTPUT 900W 8Ω BRIDGE Set to PARALLEL Speaker System 4Ω min 4Ω min SPEAKERS CHANNEL B CHANNEL A BRIDGE STEREO STEREO PARALLEL BRIDGE mode connections BRIDGE MAX OUTPUT 450W 4Ω STEREO MAX OUTPUT 900W 8Ω BRIDGE Set to BRIDGE Speaker System 8Ω min SPEAKERS CHANNEL B CHANNEL A BRIDGE STEREO STEREO PARALLEL STEREO mode In this mode channels A and B operate independentl...

Page 7: ...al on the C450 340 W 340 W 8Ω in stereo and 880 W 8Ω in monaural on the C320 160 W 160 W 8Ω in stereo and 400 W 8Ω in monau ral on the C160 Be sure to use a speaker system that has sufficient input capacity If the input capacity of your speaker system is lower than the rated output of the power amplifier you can protect your speakers by connecting a fuse serially between the speaker and amplifier ...

Page 8: ... When doing so it is necessary for 35 or more of the entire surface area of a 1U size panel to be open Air circulation will be even better if the top surface of the rack has ventilation openings Ventilation panel Yamaha provides an optional 1U size ventilation panel VP1 Unit mm 480 44 Mounting four or fewer amps in an open backed rack Install the ventilation panel above the amps as shown in the fo...

Page 9: ...pen for ventilation Front Air intake Air exhaust Completely open Rear View Side View SPEAKERS CHANNEL B CHANNEL A INPUT CHANNEL B CHANNEL A G G BRIDGE PARALLEL BRIDGE STEREO STEREO BRIDGE CHANNEL B CHANNEL A 0 40 30 20 15 10 3 6 25 dB 0 40 30 20 15 10 3 6 25 dB PARALLEL Positioning the Housed Amplifier Place the case so that the ventilation airflow paths are not blocked Front Less than 10 cm NO Fr...

Page 10: ...work 105 dB 104 dB 101 dB Channel Separation Half Power 8Ω Vol max 65 dB 20 Hz 20 kHz input 600Ω shunt 75 dB 1 kHz Slew Rate STEREO 30 V µ sec 8Ω full swing BRIDGE 50 V µ sec Sensitivity Vol max Rated Power into 8Ω 5 7 dB 4 2 dB 1 2 dB Voltage Gain Vol max 32 1 dB Controls Front Panel POWER switch Push on Push off Rear Panel Volume 31 position dB calibrated Mode switch STEREO BRIDGE PARALLEL Conne...

Page 11: ...p PC Limiter Ach Power Amp PC Limiter SPEAKERS BRIDGE PARALLEL CHANNEL A CHANNEL B CHANNEL B CHANNEL A INPUT PROTECTION TEMP Heat Sink Sensor Circuit Protection STEREO PARALLEL BRIDGE G G SIGNAL Dimensions 15 5 61 2 292 55 2 308 88 H 103 5 W 480 424 45 4 4 D 455 379 6 26 Unit mm ...

Page 12: ...dance of at least 4Ω stereo or 8Ω bridge Check the ventilation slots and improve the airflow around the amplifier Check the amplifier ventila tion conditions and take appropriate measures to improve airflow around the amplifier Consult your dealer or nearest Yamaha service center There is a short at a speaker terminal amplifier terminal or wire The amplifier load is exces sive The heat sink temper...

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