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Crown 2 - page 1
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. Trademark Notice: Power Base-3 ™ is a trademark and Power Base-1 ® , Pow ...
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Crown 2 - page 2
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 SUBSEQUENT OWNER of each NEW Crown 1 product, for a period of three (3) years from the date of purchase by the original purchaser (the “ warranty period ? ...
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Crown 2 - page 3
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. W ARNING TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE! Magnetic Field CAUTION! Do not l ...
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Crown 2 - page 4
Power Base Series Power Amplifiers Page 4 CONTENTS 1 Welcome .......................................................................... 7 1.1 Unpacking ................................................................. 7 1. 2 Features .................................................................... 7 2 Installation .............................. ...
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Crown 2 - page 5
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 .......................................................... 9 2.3Power Base Input Wiring ........................... ...
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Crown 2 - page 6
Power Base Series Power Amplifiers Page 6 ...
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Crown 2 - page 7
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. They compare very favorably to more expensive amplifiers, providing uncolored sound and signal-to-noise r ...
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Crown 2 - page 8
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 LOUDSPEAKER – + ONLY USE THE CHANNEL 1 INPUT ONLY USE THE CHANNEL 1 INPUT STEREO BRIDGE MONO PARALLEL MONO MIXER LOUDSPEAKER – + POWER BASE AMPLIF ...
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Crown 2 - page 9
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. The guidelines below are provided to help you quickly get your amplifier installed and ready to ...
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Crown 2 - page 10
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. 2. Remove the access cover on the back panel. 3. Locate the ...
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Crown 2 - page 11
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). Intelligent circuitry was then designed to simu- late the instantaneous con ...
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Crown 2 - page 12
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. This protection circuitry is activated in un- usual situati ...
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Crown 2 - page 13
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 0.1% THD + noise. Full Bandwidth Power: refers to maximum average power in watts from ...
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Crown 2 - page 14
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- 3 : Draws up to 15 amps of current. Low-Voltage Power ...
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Crown 2 - page 15
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 0.1% THD ...
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Crown 2 - page 16
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 0.1% THD + Noise (See note 4) 1 kHz 20Hz-20kHz 265 530 325 275 640 545 385 310 815 625 805 630 395 305 790 615 785 610 Maximum Average ...
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Crown 2 - page 17
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. These specifications can be used to prevent loudspeaker and hearing damage. The maximum power matr ...
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Crown 2 - page 18
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 0.05% THD + Noise (See note 2) 7 kHz 50 Hz 550 400 1190 795 1185 805 605 410 1200 820 1185 820 790 515 1805 1020 1645 1020 885 510 1785 1020 16 ...
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Crown 2 - page 19
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. 5.1 MT-XLR The MT-XLR is an accessory panel that provides two standard 3-pin female XLR input ...
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Crown 2 - page 20
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. No user serviceable parts inside. Re- fer servicing to a qualified techn ...
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Crown 2 - page 21
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. Mishawaka Rd., Elkhart, IN 46517 Phone: 1-800-342-6939 or 1-219-294-8200 Fax: 1-219-294-8124 Owner ’ s N a m e: _________________________________________________________________________ S ...
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