Instruction/ maintenance manual of the product 3 Crown
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Models: Power Base -1, 2 & 3 OFF POWER OFF POWER OFF POWER © 1996 by Crown International, Inc., P.O. Box 1000, Elkhart, Indiana 46515-1000 U.S.A. Telephone: 219-294-8000. Power-Tech amplifiers are produced by the Professional Audio Division of Crown International, Inc.
WORLDWIDE SUMMARY OF WARRANTY The Crown Audio Division of Crown International, Inc., 1718 West Mishawaka Road, Elkhart, Indiana 46517-4095 U.S.A. warrants to you, the ORIGINAL PURCHASER and ANY SUBSEQ.
Printed on recycled paper. The lightning bolt triangle is used to alert the user to the risk of electric shock. The exclamation point triangle is used to alert the user to important operating or maintenance instructions.
Power Base Series Power Amplifiers Page 4 CONTENTS 1 Welcome .......................................................................... 7 1.1 Unpacking ................................................................. 7 1. 2 Features .................
Power Base Series Power Amplifiers Page 5 ILLUSTRA TIONS 1.1 Power Base Front and Back Panels .................................... 7 2.1Three System Connection Methods ....................................... 8 2.2Do NOT Block Air Flow ................
Power Base Series Power Amplifiers Page 6.
Power Base Series Power Amplifiers Page 7 1 Welcome Congratulations on choosing a Power Base amplifier. Power Base amplifiers are compact, professional ste- reo power amplifiers engineered to meet the most de- manding sound reinforcement needs.
Power Base Series Power Amplifiers Page 8 MIXER LOUDSPEAKERS + – + – CHANNEL 1 CHANNEL 2 CHANNEL 1 CHANNEL 2 STEREO MODE BRIDGE-MONO MODE STEREO BRIDGE MONO PARALLEL MONO PARALLEL-MONO MODE MIXER .
Power Base Series Power Amplifiers Page 9 2 Installation Always remove power from the unit and turn the level controls off (fully counterclockwise) when making or breaking connections. This reduces the chance of blasts that can cause loudspeaker damage.
Power Base Series Power Amplifiers Page 10 2.3 Input Sensitivity Adjustment The input sensitivity switch inside the amplifier is set to 0.775 volts at the factory. It can be changed to 1.4 volts or a voltage gain of 26 dB as follows: 1. Turn off and unplug the amplifier from the AC source.
Power Base Series Power Amplifiers Page 11 3.3.1 ODEP Crown invented ODEP to keep the amplifier working under demanding conditions and to increase output efficiency. To do this, Crown established a rigorous pro- gram to measure each transistor’s safe operating area (SOA).
Power Base Series Power Amplifiers Page 12 The unit should never output heavy common-mode cur- rent unless its circuitry is damaged. Activating drive protection helps prevent further damage. 3.3.4 Transformer Thermal Protection All Power Base amplifiers have transformer thermal protection.
Power Base Series Power Amplifiers Page 13 4 Specifications All specifications apply to units in Stereo mode with 8-ohm loads and an input sensitivity of 26 dB unless otherwise specified. Standard 1 kHz Power: refers to maximum average power in watts at 1 kHz with 0.
Power Base Series Power Amplifiers Page 14 Required AC Mains: Current, frequency and voltage requirements are provided on each unit’s back panel. All models draw 90 watts or less at idle. Power Base-1 : Draws up to 6 amps of current. Power Base- 2 : Draws up to 10 amps of current.
Power Base Series Power Amplifiers Page 15 8 Power Base-1 – Minimum Guaranteed Power (Watts) Stereo-Mono Mode Stereo (both channels driven) Bridge-Mono (balanced output) Parallel-Mono 16 4 0.1% THD + Noise (See note 4) 1 kHz 20Hz-20kHz 180 350 175 350 200 390 390 200 390 390 Maximum Average Load (Ohms) AC Mains 120 VAC, 60 Hz Units 1 kHz 0.
Power Base Series Power Amplifiers Page 16 8 Power Base -2 – Minimum Guaranteed Power (Watts) Stereo-Mono Mode Stereo (both channels driven) Bridge-Mono (balanced output) Parallel-Mono 16 4 FTC Continuous Average 0.
Power Base Series Power Amplifiers Page 17 Maximum Power Specifications Crown’s maximum power specifications represent the largest amount of output power you can expect from your amplifier when it is driven to full output under the given conditions.
Power Base Series Power Amplifiers Page 18 8 Power Base -2 – Maximum Power (Watts) Stereo-Mono Mode Stereo (both channels driven) Bridge-Mono (balanced output) Parallel-Mono 16 4 40 Millisecond Tone Burst 0.
Power Base Series Power Amplifiers Page 19 5 Accessories There are two accessories available at the time of this printing: the MT-XLR and the MT-BB . Important: The MT-XLR and MT-BB must be installed at a Crown Factory Service Center or the Crown factory.
Power Base Series Power Amplifiers Page 20 6 Ser vice This unit has very sophisticated circuitry which should only be serviced by a fully trained technician. This is one reason why each unit bears the following label: CAUTION: To prevent electric shock, do not re- move covers.
Power Base Series Power Amplifiers Page 21 Crown Factor y Ser vice Information Shipping Address: Crown International, Inc., Factory Service, Plant 2 SW, 1718 W.
An important point after buying a device Crown 3 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Crown 3 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Crown 3 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Crown 3 you will learn all the available features of the product, as well as information on its operation. The information that you get Crown 3 will certainly help you make a decision on the purchase.
If you already are a holder of Crown 3, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Crown 3.
However, one of the most important roles played by the user manual is to help in solving problems with Crown 3. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Crown 3 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
