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BT220
BASS AMPLIFIER
USER’S GUIDE
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BT220 Bass Amplifier Table Of Contents: Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 The Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . .4,5 The Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Some Suggested Settings . . . . . . . . . . . . . . . . . . . . . .6 System Block Diagram . . . . . . . . . . . . . . . . . . . . . . . .7 Technical Specifications . . . . . . . . . . . . . . . .back cover CAUTION PRECAUCION ATTE
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BT220 Bass Amplifier Congratulations! You are now the proud owner of the Crate BT220 Bass Amplifier. The BT220 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 the Octave control. This feature electronically creates a second signal that is one octave lower than the original signal. An active electr
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BT220 Bass Amplifier The Front Panel: 1 23 4 5 6 7 8 9 10 1. INPUT: Use this 1/4” jack to connect your bass to the amplifier by means of a shielded instrument cable. 2. -15dB/0dB: Use this switch to match the output signal level of your instrument to the amplifier. If your instru- ment has standard pickups, setting the switch to the 0dB position (switch in the out position) should yield the best results. If your bass has active electronics or high output pickups, set the switch to the -15dB posi
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BT220 Bass Amplifier The Front Panel: 11 12 13 14 15 16 17 18 17. HEADPHONES: Use this jack to listen to the amplifier through a pair of stereo headphones. The internal speaker is disconnected when the headphones jack is used. To avoid possible damage to your hearing, do not use headphones for extended periods of time at extremely loud listening levels. 18. POWER: Use this switch to turn the amplifier on and off. The adjacent LED illuminates when the amplifier is turned on. 19. ELECTRONIC TUNER
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BT220 Bass Amplifier Suggested Starting Settings: Rock: OUT ** Jazz: OUT ** Country: OUT ** Funk: OUT ** Solo Fuzz: IN ** Super Fat Fuzz: IN * 6
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BT220 Bass Amplifier System Block Diagram: OCTAVE LEVEL TUNER FOOT SWITCHING SWITCH CIRCUITRY A BC D EF G BUFFER EQ INPUT LEVEL CHANNEL -15dB PAD LOW LOW HIGH HIGH SWITCH MID MID NOISE GATE SHAPE DISTORTION LEVEL GAIN EFFECTS LOOP SEND RETURN EFFECTS BLEND MUTE MASTER CD INPUT LIMIT PRE BALANCED LINE OUT SPEAKER POST BALANCED POWER LINE OUT GND/ AMP VOLUME GND EXTERNAL LIFT SPEAKER ATTENUATOR HEAD PHONES 7
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BT220 Bass Amplifier BT220 Technical Specifications: Output Power Rating 220W RMS 2% THD, 4Ω , 120 VAC Gain Distortion Channel 103dB Clean Channel 61dB CD Inputs 33dB Tone Range Low 20dB @ 50Hz Lo Mid 24dB @ 150Hz Hi Mid 18dB @ 1kHz High 32dB @ 10kHz Signal to Noise Ratio 65dB below full power, tones flat, gain and level @ “10” Input Impedance 220k ohms Maximum Input Signal Level Accepted 15 volts peak-to-peak Balanced Line Out Jack 2 volts peak-to-peak @ full rated power w/600 ohm load Internal
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