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A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of Crate Amplifiers BT220H, along with an item. The lack of an instruction or false information given to customer shall constitute grounds to apply for a complaint because of nonconformity of goods with the contract. In accordance with the law, a customer can receive an instruction in non-paper form; lately graphic and electronic forms of the manuals, as well as instructional videos have been majorly used. A necessary precondition for this is the unmistakable, legible character of an instruction.
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Unfortunately, only a few customers devote their time to read an instruction of Crate Amplifiers BT220H. A good user manual introduces us to a number of additional functionalities of the purchased item, and also helps us to avoid the formation of most of the defects.
What should a perfect user manual contain?
First and foremost, an user manual of Crate Amplifiers BT220H should contain:
- informations concerning technical data of Crate Amplifiers BT220H
- name of the manufacturer and a year of construction of the Crate Amplifiers BT220H item
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- safety signs and mark certificates which confirm compatibility with appropriate standards
Why don't we read the manuals?
Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of Crate Amplifiers BT220H alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of Crate Amplifiers BT220H, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the Crate Amplifiers service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of Crate Amplifiers BT220H.
Why one should read the manuals?
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Table of contents for the manual
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Page 1
BT220H BASS AMPLIFIER USER’S GUIDE[...]
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Page 2
IMPORT ANT SAFETY INSTRUCTIONS • READ, FOLLOW , HEED, AND KEEP ALL INSTRUCTIONS AND W ARNINGS. • DO NOT OPERA TE NEAR ANY HEA T SOURCE AND DO NOT BLOCK ANY VENTILA TION OPENINGS ON THIS APP ARA TUS. FOR PROPER OPERA TION, THIS UNIT REQUIRES 3” (75mm) OF WELL VENTILA TED SP ACE AROUND HEA TSINKS AND OTHER AIR FLOW PROVISIONS IN THE CABINET . ?[...]
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Page 3
3 Congratulations! Y ou are now the proud owner of the Crate BT220H Bass Amplifier . The BT220H features two different channels: a Distortion channel, featuring Crate’ s exclusive Shape control for quick and easy access to the tone you need, and a Clean channel with a four-band rotary EQ. Another unique and valuable feature of this amplifier is t[...]
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Page 4
BT220H Bass Amplifier 4 1. ELECTRONIC TUNER: This active electronic tuner is on whenever the amplifier is turned on, allowing you constant, “real- time” tuning. The tuner is fully chromatic – use the flat and sharp indicators until the LED between them illuminates, indi- cating proper tuning. 2. INPUT : Use this 1/4” jack to connect your ba[...]
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Page 5
BT220H Bass Amplifier 5 The Rear Panel: 20. AC LINE CORD (not shown): The grounded power cord should only be plugged into a grounded power outlet that meets all applicable electrical codes and is compatible with the volt- age, power , and frequency require- ments stated on the rear panel. Do not attempt to defeat the safety ground connection. 21. P[...]
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Page 6
6 Suggested Starting Settings: BT220H Bass Amplifier Roc k: OUT Jazz: OUT Country: OUT Funk: OUT Solo Fuzz: IN Super F at Fuzz: IN ** ** ** ** ** *[...]
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Page 7
BT220H Bass Amplifier 7 System Block Diagram: BUFFER INPUT -15dB PAD LEVEL LOW LOW MID HIGH MID HIGH CHANNEL SWITCH PRE LIMIT POST MUTE EQ NOISE GATE GAIN DISTORTION LEVEL TUNER A BC D EF G SHAPE LEVEL OCTAVE MASTER BALANCED LINE OUT VOLUME BALANCED LINE OUT GND/ GND LIFT EFFECTS BLEND EXTERNAL SPEAKER EXTERNAL SPEAKER SEND HEAD PHONES POWER AMP AT[...]
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Page 8
©2003 ST . LOUIS MUSIC, 1400 FERGUSON, ST . LOUIS, MO. 63133 47-462-01 • 1 1 1703 BT220H Bass Amplifier Output Power Rating 220W RMS 2% THD @ 4 Ω , 120 V AC Gain Distortion Channel 106dB Clean Channel 61dB CD Inputs 36dB T one Range Low 20dB @ 50Hz Lo Mid 24dB @ 150Hz Hi Mid 18dB @ 1kHz High 34dB @ 10kHz Signal to Noise Ratio 65dB below full p[...]