Yamaha P-4500 Owners manual

POWER AMPLIFIER

Owner's Manual

Mode d'emploi

Bedienungsanleitung

Manual de instrucciónes

		A	CLIP		B
TEMP		SIGNAL
		15			15
PROTECTION	20			20
POWER	25	10	25		10
	30	6	30		6
	40	3	40		3
ON OFF	∞	0	–dB	∞	0

EEEngine

M

Introduction

Thank you for purchasing a Yamaha P4500/3200/1600 series power amplifier.

This series of audio amps was developed from Yamaha's wealth of experience in building PA equipment and its tradition of careful attention to every detail of circuit design. These amps feature high power and superb quality together with superior reliability and stability, guaranteeing the highest possible audio performance.

Main features of the P4500/P3200/P1600 series

•Three types of input jack (balanced XLR type connectors, balanced phone jacks, and barrier strip), and five-way binding post output jacks are provided, allowing use in a wide variety of situations including installed applications.

•Three operating modes are provided: STEREO mode in which CHANNEL A and B operate independently, PARALLEL mode in which a mono source is output by two amp systems, and BRIDGE mode in which the unit operates as a single high-power amplifier.

•A SIGNAL indicator and CLIP indicator is provided for each channel.

•The PROTECTION indicator shows the status of protective circuitry such as power-on/off protection, output muting, and the DC detection circuit. The TEMP indicator warns of heat sink overheating.

•Variable-speed low-noise fan(s) ensures high reliability even under demanding conditions.

This owner's manual covers the three models P4500, P3200 and P1600. In order to take full advantage of your power amp and enjoy long and trouble-free operation, please read this owner's manual carefully before use.

IMPORTANT NOTICE FOR

THE UNITED KINGDOM

Connecting the Plug and Cord

WARNING: THIS APPARATUS MUST BE EARTHED

IMPORTANT: The wires in this mains lead are coloured in accordance with the following code:

GREEN-AND-YELLOW : EARTH

BLUE	: NEUTRAL
BROWN	: LIVE

As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured markings identifying the terminals in your plug, proceed as follows:

The wire which is coloured GREEN and YELLOW must be connected to the terminal in the plug which is marked by the letter E or by the safety earth symbol or coloured GREEN and YELLOW.

The wire which is coloured BLUE must be connected to the terminal which is marked with the letter N or coloured BLACK.

The wire which is coloured BROWN must be connected to the terminal which is marked with the letter L or coloured RED.

*This applies only to products distributed by YAMAHA KEMBLE

MUSIC (U.K.) LTD.

Precautions

1.Avoid excessive heat, humidity, dust and vibration.

Keep the unit away from locations where it is likely to be exposed to high temperatures or humidity — such as near radiators, stoves, etc. Also avoid locations which are subject to excessive dust accumulation or vibration which could cause mechanical damage.

2.Ventilation

Allow a distance of 10 cm between the unit and the wall so that heat generated from the unit will be released effectively. Also, allow enough space between the unit and other devices. If you mount the unit in an audio rack, keep a space of 10 cm on the top panel, and a space of 1 cm to the side panel. Remove the rear panel of the rack or open a vent hole. If heat release is inadequate, the unit will retain heat inside the unit, which may cause a fire.

3.Avoid physical shocks.

Strong physical shocks to the unit can cause damage. Handle it with care.

4.Do not open the case or attempt repairs or modifications yourself.

This product contains no user-serviceable parts. Refer all maintenance to qualified Yamaha service personnel. Opening the case and/or tampering with 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 damage to the unit itself as well as other connected equipment.

6.Handle cables carefully.

Always plug and unplug cables — including the AC cord

— by gripping the connector, not the cord.

7.Clean with a soft dry cloth.

Never use solvents such as benzine or thinner to clean the unit. Wipe clean with a soft, dry cloth.

8.Always use the correct power supply.

Make sure that the power supply voltage specified on the rear panel matches your local AC mains supply. Also make sure that the AC mains supply can deliver more than enough current to handle all equipment used in your system.

Contents
Controls and Functions .............................................................	2
Front Panel ...........................................................................	2
Rear Panel ...........................................................................	3
Modes: STEREO/PARALLEL/BRIDGE ................................	4
SPEAKER IMPEDANCE......................................................	4
Caution for Speaker Connection ...............................................	5
Rack Mounting ..........................................................................	6
Mounting in an EIA standard rack .......................................	6
Mounting four or fewer amps in an open-backed rack.........	6
Mounting five or more amps, or when (even with four or
fewer units) the back of the rack cannot be left open ..........	6
Portable Rack Mounting ......................................................	7
Positioning the Housed Amplifier .........................................	7
Specifications ............................................................................	8
General Specifications .........................................................	8
Block Diagram ......................................................................	9
Dimensions ..........................................................................	9
Performance Graphs ..........................................................	10
Troubleshooting ......................................................................	10

Controls and Functions

■ Front Panel

2

3

4

		A	CLIP		B
TEMP		SIGNAL
		15			15
PROTECTION	20			20
POWER	25	10	25		10
	30	6	30		6
	40	3	40		3
ON OFF	∞	0	–dB	∞	0
	EEEngine

1 5 6

1POWER switch and indicator

This is the main POWER switch. Press to power ON the amplifier. Press again to power OFF. The POWER indicator lights up when the amplifier is powered ON.

2TEMP indicator

When the temperature of the heat sink exceeds 85 degrees Celsius, this indicator will light red.

3PROTECTION indicator

This red LED indicator lights up for approximately 3 seconds when the amplifier is powered ON, indicating that the soft-start protection system is working. No sound is output during soft-start up. If one of the protection 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 goes out, and normal amplifier operation is resumed.

4CLIP indicators

These red LED indicators light up when the respective channel’s output signal distortion exceeds 1% (i.e. clipping). Output signal clipping is usually due to excessive input signal levels.

5SIGNAL indicators

These green LED indicators light up when the respective

channel’s output signal exceeds 2 Vrms. This is equivalent to 1/2 watt into 8Ω , 1 W into 4Ω .

6Volume controls

These volume controls allow you to adjust the volume level in 31 steps in the range between –∞ dB and 0 dB.

To fix the volume setting by protecting the controls, install the included security cover over the controls and tighten the screws in the holes as shown below.

20	15		20	15
25	10		25	10
30	6		30	6
40	3		40	3
∞	0	–dB	∞	0

2

■ Rear Panel

1			2		3	4
INPUT			(BRIDGE)		SPEAKERS
CHANNEL B	CHANNEL A				CHANNEL B	CHANNEL A
			(PARALLEL)
						(STEREO)
G		G
			BRIDGE			4-8Ω /SP
						(BRIDGE)
						8-16Ω /SP
					STEREO
					BRIDGE
			STEREO	PARALLEL	MAX. OUTPUT 450W/4Ω	(STEREO)
					MAX. OUTPUT 900W/8Ω	(BRIDGE)

1INPUT terminals (CHANNEL A, B)

Three types of balanced terminals for channels A and B are provided.

Channel A input terminal is used in Bridge and Parallel mode.

•XLR-3-31 type connector

They are wired pin 1–ground, pin 2–hot (+), and pin 3 cold (-).

Hot

2

1

Ground

3

Cold

•Phone jack

They are wired tip–hot (+), ring–cold (-), and sleeve– ground.

Ring

Sleeve Tip

•Barrier strip

Hot (+), Cold (-) and Ground (G).

2STEREO/BRIDGE/PARALLEL switch

This slide switch is used to set the amplifier operating mode: STEREO, BRIDGE or PARALLEL.

For details on the functionality of each mode, refer to “ Modes” on page 4.

3SPEAKERS terminals

For polarity in each mode, refer to the following diagram.

• STEREO, PARALLEL mode

SPEAKERS

CHANNEL B

CHANNEL A

STEREO

BRIDGE

• BRIDGE mode

SPEAKERS

CHANNEL B

CHANNEL A

STEREO

BRIDGE

In BRIDGE mode, the (-) jacks of CHANNELS A and B are not used.

The minimum impedance for the connected speaker system is specified in “ Speaker Impedance” on page 4.

4GND 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.

3

■ Modes: STEREO/PARALLEL/BRIDGE

STEREO mode

In this mode, channels A and B operate independently (as a conventional stereo amp).

The CHANNEL A input signal will be output from the CHANNEL A output jacks, and the CHANNEL B input signal will be output from the CHANNEL B output jacks.

PARALLEL mode

In this mode, the CHANNEL A input signal will be output from the output jacks of both channels A and B. The CHANNEL B input jack is not used. The (channel)

A and B volumes can be adjusted independently.

BRIDGE mode

In this mode, the CHANNEL A input signal will be output from the BRIDGE output jacks. In this case, use

the front panel (channel) A volume control to adjust the volume.

■ SPEAKER IMPEDANCE

In STEREO and PARALLEL modes, the minimum load (=speaker) impedance is 4Ω . In BRIDGE mode it is 8Ω . Make sure that the impedance does not fall below this specified impedance.

STEREO mode connections

SPEAKERS

	CHANNEL B		CHANNEL A
BRIDGE
Set to STEREO
		STEREO
		BRIDGE
STEREO PARALLEL	MAX. OUTPUT 450W/4Ω		(STEREO)
	MAX. OUTPUT 900W/8Ω		(BRIDGE)
	–	+	+	–

4Ω min.

4Ω min.

Speaker System

PARALLEL mode connections

SPEAKERS

	CHANNEL B		CHANNEL A
BRIDGE
Set to PARALLEL
		STEREO
		BRIDGE
STEREO PARALLEL	MAX. OUTPUT 450W/4Ω		(STEREO)
	MAX. OUTPUT 900W/8Ω		(BRIDGE)
	–	+	+	–

4Ω min.

4Ω min.

Speaker System

BRIDGE mode connections

SPEAKERS

	CHANNEL B	CHANNEL A
BRIDGE
Set to BRIDGE
	STEREO
	BRIDGE
STEREO PARALLEL	MAX. OUTPUT 450W/4Ω	(STEREO)
	MAX. OUTPUT 900W/8Ω	(BRIDGE)

– +

8Ω min.

Speaker System

4

Caution for Speaker Connection

1.Turn off the POWER switch.

2.Remove the cover attachment screw(s) and remove the protective cover from the speaker terminals.

Screw

3.After removing approx. 10 mm of insulation from the ends of the speaker cables, pass the bare ends of the speaker wires through the holes in the corresponding speaker terminals and tighten the terminals to securely clamp the wires.

Refer to page 3 for speaker porality.

•Speaker fuse

The output capacity of your amplifier is very high: 460 W+460 W (8Ω ) in stereo and 1240 W (8Ω ) in monaural on the P4500; 340 W+340 W (8Ω ) in stereo and 880 W (8Ω ) in monaural on the P3200; 160 W+160 W (8Ω ) in stereo and 400 W (8Ω ) in monaural on the P1600. 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 as shown below.

Power amplifier		Speaker system
_	+	+	_
		Fuse

10 mm

At this time make sure that the bare ends of the speaker cables do not extend from the terminals in such a way that they touch the chassis.

Wire should not touch the chassis.

4.Reattach the protective cover over the speaker terminals.

Use the following formula to determine the fuse capacity according to the speaker’s input capacity.

Po = I2R → I = √ Po/R

P0 [W] : Speaker’s continuous input capacity (noise or RMS)

R [Ω ] : Speaker’s nominal impedance I [A] : Required fuse capacity

ex.) Speaker’s continuous input capacity : 100 W Speaker’s impedance : 8Ω

I = √ 100/8

In this example, the required fuse capacity is calculated as 3.5 [A].

•Speaker cable

If you use a long speaker cable, use as thick a cable as possible to prevent deterioration of the damping factor or power loss inside the cable.

5

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.

480

44

Unit: mm

■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)

				A	CLIP		B
TEMP				SIGNAL
			20	15		20	15
PROTECTION
POWER		25		10	25		10
		30		6	30		6
		40		3	40		3
ON	OFF		∞	0	–dB	∞	0
		EEEngine
				A	CLIP		B
TEMP				SIGNAL
			20	15		20	15
PROTECTION
POWER		25		10	25		10
		30		6	30		6
		40		3	40		3
ON	OFF		∞	0	–dB	∞	0
		EEEngine
				A	CLIP		B
TEMP				SIGNAL
			20	15		20	15
PROTECTION
POWER		25		10	25		10
		30		6	30		6
		40		3	40		3
ON	OFF		∞	0	–dB	∞	0
		EEEngine

■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.

				A	CLIP		B
TEMP				SIGNAL
			20	15		20	15
PROTECTION
POWER		25		10	25		10
		30		6	30		6
		40		3	40		3
ON	OFF		∞	0	–dB	∞	0
		EEEngine
				A	CLIP		B
TEMP				SIGNAL
			20	15		20	15
PROTECTION
POWER		25		10	25		10
		30		6	30		6
		40		3	40		3
ON	OFF		∞	0	–dB	∞	0
		EEEngine
				A	CLIP		B
TEMP				SIGNAL
			20	15		20	15
PROTECTION
POWER		25		10	25		10
		30		6	30		6
		40		3	40		3
ON	OFF		∞	0	–dB	∞	0
		EEEngine
				A	CLIP		B
TEMP				SIGNAL
			20	15		20	15
PROTECTION
POWER		25		10	25		10
		30		6	30		6
		40		3	40		3
ON	OFF		∞	0	–dB	∞	0
		EEEngine

6

■ Portable Rack Mounting

The amplifier intakes cool air through the front panel and exhausts warm air out the rear panel. When mounting amplifiers in a portable rack, make sure the rear panel is completely open for ventilation.

(Side View)

(Rear View)

Front

Air intake					Air exhaust

Completely open

INPUT		(BRIDGE)	SPEAKERS
CHANNEL B	CHANNEL A	(PARALLEL)	CHANNEL B	CHANNEL A
G	G

■ Positioning the Housed Amplifier

Place the case so that the ventilation airflow paths are not blocked.

Front

Less than 10 cm

Front

NO

NO

7

Specifications

■ General Specifications

							P4500			P3200	P1600
Power Output Level (Rated Power)				8Ω	/STEREO	460 W + 460 W				340 W + 340 W	160 W + 160 W
	20 Hz~20 kHz			4Ω	/STEREO	620 W + 620 W				440 W + 440 W	200 W + 200 W
0.05%				8Ω	/BRIDGE	1240 W				880 W	400 W
	1 kHz			8Ω	/STEREO	520 W + 520 W				370 W + 370 W	175 W + 175 W
0.05%				4Ω	/STEREO	720 W + 720 W				520 W + 520 W	230 W + 230 W
				8Ω	/BRIDGE	1440 W				1040 W	460 W
	1 kHz, 20 ms, no clip			2Ω	/STEREO	1300 W + 1300 W				950 W + 950 W	350 W + 350 W
Power Bandwidth			Half Power, 0.1%			10 Hz~40 kHz
Total Harmonic Distortion (THD + N)				4~8Ω /STEREO		0.05%
	20 Hz~20 kHz, Half Power			8Ω	/BRIDGE
Frequency Response						10 Hz~50 kHz, +0, –1 dB
Intermodulation distortion (IMD)				4~8Ω /STEREO		0.05%
	7 kHz: 60 Hz, 1: 4, Half Power			8Ω	/BRIDGE
Damping factor				1 kHz, 8Ω		200
Input Impedance						30 kΩ /Balance, 15 kΩ				/Unbalanced
Residual Noise		Vol. min.		12.7 kHz LPF		–80 dB
				IHF-A network
SN Ratio Input 600Ω			shunt	12.7 kHz LPF		105 dB				104 dB	101 dB
				IHF-A network
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)
						Volume (31 position dB calibrated)
				Rear Panel		Mode switch (STEREO/BRIDGE/PARALLEL)
Connectors				Input		Barrier strip terminal
						XLR-3-31 type
						1/4-inch phone jack (balanced)
				Output		5-way binding posts
Indicators			POWER
			TEMP			(heatsink temp ≥ 85° C)
			PROTECTION (mute)
			CLIP			×	2
			OUTPUT SIGNAL			×	2
Protection Circuits						POWER switch ON/OFF, Muting, DC detection
						TEMP (heatsink temp ≥ 95° C)
PC limiter						RL ≤ 1Ω
Fan Circuits						Low speed (50° C), Variable, High speed (70° C)
Power Requirements			United States & Canada			120 V, 60 Hz
			Europe			230 V, 50 Hz
			Other			240 V, 50 Hz
Power Consumption						500 W/650 VA				400 W/500 VA	200 W/250 VA
Dimensions (W ×		H × D)				480 × 103.5 × 455 mm
Weight						16 kg				15 kg	12 kg
Accessories						Security cover
Options						Ventilation panel: VP1

0 dB=0.775 Vrms, Half Power=1/2 Power Output Level (Rated Power) Specifications subject to change without notice.

8

■ Block Diagram
					SIGNAL
		Ach Power Amp
A					CHANNEL A
		PC Limiter
CHANNEL A
(BRIDGE)
(PARALLEL)		CLIP
G		Temperature	Protection		PROTECTION
INPUT		Sensor			SPEAKERS
				Circuit
G		(Heat Sink)			TEMP
		CLIP
CHANNEL B					SIGNAL
	PARALLEL	Bch Power Amp
	BRIDGE				CHANNEL B
B	STEREO
		PC Limiter

■ Dimensions

424

W:480

308

26

379.6

D:455

45 4.4

88	H:103.5
15.5

61.2

292

55.2

Unit: mm

9

■ Performance Graphs

P4500

Mode:STEREO

Both ch Driven

5k

RL=4Ω , f=1kHz

[W]

1k

Consumption

100

Power

20 1

10

100

1k

Output Power [W]

P1600

Mode:STEREO

Both ch Driven

5k

RL=4Ω , f=1kHz

[W]

1k

Consumption

100

Power

20 1

10

100

1k

Output Power [W]

Power Consumption [W]

	P3200	Mode:STEREO
		Both ch Driven
5k		RL=4Ω , f=1kHz

1k

100
20 1	10	100	1k

Output Power [W]

Troubleshooting

The following table lists the main causes of abnormal operation and the corrective measures required, as well as the protective circuit operation in each case.

	Indicator	Probable Cause	Remedy	Protection Circuit
		There is a short at a speaker	Locate and correct the cause
		terminal, amplifier terminal,
			of the short.	The PC limiter circuit
		or wire.
	CLIP indicator lights.			operates to protect the power
			Use a speaker system with
		The amplifier load is exces-		transistors.
			an impedance of at least 4Ω
		sive.
			(stereo) or 8Ω (bridge).
		The heat sink temperature	Check the ventilation slots,	Warning by the TEMP
	TEMP indicator lights.		and improve the airflow
		has exceed 85˚C.		indicator.
			around the amplifier.
			Check the amplifier ventila-
		The heat sink temperature	tion conditions and take	The thermal protection circuit
			appropriate measures to	operates to protect the power
		has exceeded 95˚C.
			improve airflow around the	transistors.
	PROTECTION indicator
			amplifier.
	lights.
		A DC voltage of +/–2 V or	Consult your dealer or
		greater was generated in the		The relay operates to protect
			nearest Yamaha service
		power amplifier’s output		the speaker system.
			center.
		circuit.

10

P4500/3200/1600 Mode d'emploi

Nous vous remercions d’avoir opté pour un amplificateur de puissance Yamaha P4500/3200/1600.

Cette série d’amplificateurs audio est le fruit d’une longue expérience que Yamaha a accumulée en fabricant du matériel PA ainsi que d’une attention traditionnelle portée à tous les détails de la conception d’un circuit. Ces amplificateurs n’offrent donc pas seulement une performance sortant de l’ordinaire mais également une qualité, une fiabilité et une solidité qui garantit la meilleure reproduction audio possible.

Voici les caractéristiques principales de la série P4500/ 3200/1600:

•Trois types d’entrées (connecteurs symétriques de type XLR, des jacks symétriques et des connecteurs pour câbles dénudés) ainsi que des sorties à bornes de connexion ce qui permet d’insérer cet amplificateur dans n’importe quel type d’installation.

•Trois modes: Le mode STEREO qui permet aux canaux A et B d’opérer indépendamment, le mode PARALLEL qui reproduit un signal mono via les deux circuits d’amplification et le mode BRIDGE qui permet de transformer l’appareil en un amplificateur à un canal de très haute puissance.

•Un témoin SIGNAL et CLIP par canal.

•Un témoin PROTECTION qui indique le statut du circuit de protection tel que la protection lors de la mise sous/hors tension, l’étouffement de la sortie et le circuit de détection de courant continu. Le témoin TEMP s’allume lorsqu’il y a surchauffe du radiateur dissipateur de chaleur.

•Un ou plusieurs ventilateur(s) à vitesse variable d’un niveau de bruit très bas garantissent une excellente fiabilité même dans les conditions les plus difficiles.

Ce manuel couvre les modèles P4500, P3200 et P1600. Veuillez le lire complètement pour éviter toute erreur de manipulation et pouvoir jouir de votre amplificateur durant de longues années.

Précautions

1.Evitez des endroits excessivement poussiéreux et humides, ainsi que des vibrations trop importantes.

Tenez cet appareil à l’écart d’endroits où il risque d’êtres soumis à des températures ou des degrés d’humidité trop importants – tels des radiateurs, des poêles etc. Ne le placez jamais à un endroit fortement poussiéreux ou soumis à des vibrations qui pourraient entraîner des dommages mécaniques.

2.Ventilation

Veiller à garder une distance minimum de 10 cm entre l’unité et un mur pour que l’air dégagé par cette unité puisse se dissiper. De plus, veillez à ce que la distance entre cet amplificateur et d’autres unités soit suffisamment grande. Si vous logez cette unité dans un rack audio, laissez un espace de 10 cm entre dans la partie supérieure du rack et 1 cm sur les côtés. Retirez la face arrière du rack ou utilisez un rack ouvert. Si la chaleur ne peut pas se dissiper, le manque de ventilation peut provoquer un incendie.

3.Manipuler avec soin.

Ne laissez jamais tomber cet appareil et manipulez-le avec soin.

4.N’ouvrez jamais le boîtier et surtout ne tentez jamais de le réparer vous-même.

Ce produit ne contient pas de pièces pouvant être réparées par l’utilisateur. Confiez tout travail d’entretien à une service technique agréé par Yamaha. Notez qu’en ouvrant le boîtier, vous mettez automatiquement un terme aux conditions de garantie.

5.Veillez à éteindre cet appareil avant d’établir ou de défaire des connexions.

Il importe de mettre cet appareil hors tension avant d’y connecter ou de déconnecter des câbles afin d’éviter d’endommager cet appareil ou tout autre appareil utilisé.

6.Prudence avec les câbles.

Veillez à toujours déconnecter tous les câbles –y compris le cordon d’alimentation– en tirant sur les fiches. Ne tirez jamais sur les câbles.

7.Nettoyez avec un chiffon doux et sec.

N’utilisez jamais de benzène ou de diluant pour nettoyer le boîtier. Nettoyez-le avec un chiffon doux et sec.

8.Utilisez toujours la tension requise.

Vérifiez d’abord si les données concernant la tension en face arrière correspondent à la tension fournie par la prise à laquelle vous reliez cet appareil. Assurez-vous en outre que cette prise est capable de fournir suffisamment de courant pour alimenter votre système.

Table des matières
Commandes et fonctions .........................................	2
Panneau avant ......................................................	2
Panneau arrière ....................................................	3
Modes: STEREO/PARALLEL/BRIDGE .................	4
Impedance des enceintes .....................................	4
Connexion des enceintes ........................................	5
Montage en rack ......................................................	6
Montage dans un rack standard EIA ....................	6
Montage de quatre amplificateurs maximum avec
face arrière ouverte ...............................................	6
Montage de cinq amplificateurs ou plus ou lorsque
(avec moins de 4 amplificateurs) la face arrière ne
peut rester ouverte................................................	6
Montage en “flightcase” ........................................	7
Installation de l’amplificateur à tout autre endroit . 7
Fiche technique .......................................................	8
Caractéristiques générales ...................................	8
Schéma .................................................................	9
Dimensions ...........................................................	9
Graphiques de performance ...............................	10
En cas de probleme ...............................................	10

FRANÇAIS