CONGRATULATIONS! You are now the proud owner of the Crate TXB50 battery powered amplifier with Digital Signal Processing. At last, you can take your music with you and have great tone on the road. Not only is the TXB50 compact and portable, it also features a four band rotary eq, a switchable contour control and the incredible sound that has made Crate a household name among musicians.
FEATURES: • Four band rotary equalizer • Switchable Contour control • Crate’s Digital Signal Processing (DSP) • Insert jack for connecting external effects • CD Inputs for connecting background music • Headphones jack for silent operation • Internal rechargeable power supply for at least 8 hours of normal playing time, 2 hours at full output – fully recharges within 6 hours (when battery is fully discharged; shorter if partially charged) • Two-color battery status LED – red indicates low battery, yellow ind
ABOUT THE POWER SUPPLY: The TXB50 uses a sealed lead-acid 12-volt battery as its internal power source. Unlike ni-cad batteries, this battery has no “memory” – it can be fully recharged at any time, without damage to the battery. When fully charged, the LED next to the power switch will illuminate yellow with the switch at the on position. The LED will change to red when the battery is low and needs recharging.
ABOUT THE POWER SUPPLY (continued): The TXB50 may also be powered by using a 12-volt automotive cigarette lighter adapter, available at most electronic supply stores. Make certain that the polarity on the adapter matches what is shown below. POSITIVE NEGATIVE Connect the small round end of the adapter to the 12VDC Automobile adapter jack (#18, page 8), then connect the other end of the adapter into the vehicle’s cigarette lighter socket.
THE FRONT PANEL: INPUT INPUT GAIN EQUALIZATION CONTOUR LOW –12 +12 LOW MID –12 +12 HIGH MID –12 +12 HIGH –12 +12 ACTIVE TXB50 1 2 3 4 6 7 8 1. INPUT: Connect an active or passive instrument here by means of a shielded signal cable terminated with a 1/4” connector. 5. LOW: Use this control to adjust the low frequency level of the amplifier. This control provides a 19dB range of cut or boost at 60Hz. 2.
DSP MASTER LEVEL MODE LEVEL CD INPUT INSERT POWER FUNK-WAH FLANGE OCTAVE CHORUS CHO/HALL ECHO ROOM DELAY HALL BASS BUS 9 10 11 12 9. MASTER LEVEL: Use this control to adjust the overall output of the amplifier. 10. DSP MODE: Use this control to select the type of Digital Signal Processing (DSP) effect applied to the signal.
THE REAR PANEL: DC CHARGER PLUG DC CIGARETTE LIGHTER ADAPTOR LIT WHEN CHARGING 15V DC 12V DC 17 18 17. DC CHARGER PLUG, 15VDC: Plug the small round connector of the AC wall adapter into this jack to charge the internal battery. The LED next to the jack glows red when the amp is charging. See page 4 for additional information. POSITIVE NEGATIVE 18.
SUGGESTED SET-UPS: The TXB50 can be used in a variety of different ways, some of which are shown below and on the following page. Use these ideas to fuel your imagination for the setup which best suits your needs. Idea 1 – Play along, with external effects and backup: Connect an instrument (bass, guitar, keyboard) to the Input jack. (This high-Z input works with all types of pickups, from Piezo to active types.) Connect a tape player or CD player to the CD Input jacks.
SUGGESTED SET-UPS (CONTINUED): Idea 3 - Music Playback: Connect the outputs of a CD player or tape deck to the Input jack. (Use a dual RCA-to-mono 1/4” adapter as shown below.) Use the gain, eq and level controls to adjust the sound as desired. CD PLAYER INPUT EQ, COMP/LMTR INSERT Notes: • When a tape player or CD player is connected to the CD Input jacks, the output of the player may need to be adjusted by means of its output level control (if it has one), or by an external attenuator/preamp.
SYSTEM BLOCK DIAGRAM: INPUT CONTOUR EQ GAIN SHAPE DSP LOW LOW HIGH HIGH MID MID LEVEL MODE POWER AMP LIMITER MASTER LEVEL HEAD PHONES INSERT CD INPUTS POWER SUPPLY DC CHARGER DC CIGARETTE LIGHTER ADAPTER FUSE SMART CHARGER CHARGING CIRCUIT FUSE CHARGING INDICATOR BATTERY INDICATOR BATTERY 11
TECHNICAL SPECIFICATIONS OUTPUT POWER RATING 50W RMS @ 10% THD, 4 ohms, 13.6VDC in INPUT IMPEDANCE 220k ohm MAXIMUM SIGNAL ACCEPTED 12V peak to peak GAIN SENSITIVITY EQS Input CD Input Insert Input Line In Insert Low Low Mid High Mid High INSERT JACK Tip Ring Sleeve 52dB 23dB 37dB 25mV RMS 150mV RMS 19dB range @ 60Hz 25dB range @ 200Hz 16dB range @ 1kHz 28dB range @ 10kHz Line In Line Out Ground SPEAKER Crate Custom Design 10”, 4 ohm, 50 watt 1.