BT220H BASS AMPLIFIER USER’S GUIDE
BT220H Bass Amplifier Table Of Contents: Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 The Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 The Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Some Suggested Settings . . . . . . . . . . . . . . . . . . . . . .6 System Block Diagram . . . . . . . . . . . . . . . . . . . . . . . .7 Technical Specifications . . . . . . . . . . . . . . . .
BT220H Bass Amplifier Congratulations! You 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 the Octave control. This feature electronically creates a second signal that is one octave lower than the original signal.
BT220H Bass Amplifier The Front Panel: 1 2 3 4 5 6 7 8 9 1. ELECTRONIC TUNER: This active electronic tuner is on whenever the amplifier is turned on, allowing you constant, “realtime” tuning. The tuner is fully chromatic – use the flat and sharp indicators until the LED between them illuminates, indicating proper tuning. 2. INPUT: Use this 1/4” jack to connect your bass to the amplifier by means of a shielded instrument cable. 3.
BT220H 10 11 12 13 14 Bass Amplifier 15 16 17 18 19 The Rear Panel: 20. AC LINE CORD (not shown): The grounded power cord should only be plugged into a grounded power outlet 21 that meets all applicable electrical codes and is compatible with the volt- 22 PREAMP POWER AMP OUT IN age, power, and frequency requireBALANCED LINE OUT ments stated on the rear panel. Do not PRE POST attempt to defeat the safety ground EFFECTS LOOP connection. 21.
BT220H Bass Amplifier Suggested Starting Settings: Rock: OUT * * Jazz: OUT * * Country: OUT * * Funk: OUT * * Solo Fuzz: IN * * Super Fat Fuzz: IN * 6
BT220H Bass Amplifier System Block Diagram: OCTAVE LEVEL TUNER FOOT SWITCH A BC D EF G SWITCHING CIRCUITRY BUFFER EQ INPUT LEVEL -15dB PAD LOW LOW HIGH HIGH MID MID CHANNEL SWITCH NOISE GATE SHAPE DISTORTION LEVEL GAIN EFFECTS LOOP RETURN SEND EFFECTS BLEND MUTE MASTER CD INPUT GND/ GND LIFT LIMIT PRE BALANCED LINE OUT BALANCED LINE OUT VOLUME EXTERNAL SPEAKER POST POWER AMP EXTERNAL SPEAKER POWER AMP IN ATTENUATOR PREAMP OUT HEAD PHONES 7
BT220H Bass Amplifier BT220H Technical Specifications: Output Power Rating Gain 220W RMS 2% THD @ 4Ω, 120 VAC Distortion Channel 106dB Clean Channel 61dB CD Inputs 36dB Tone Range Low 20dB @ 50Hz Lo Mid 24dB @ 150Hz Hi Mid 18dB @ 1kHz High 34dB @ 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 oh
