Crate Amplifiers Stereo Amplifier TX50DE User Manual

Driver’s Guide  
for the  
CRATE LIMO  
battery powered amplifier  
with the new rugged, lightweight molded polymer enclosure!  
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C R AT E  
FEATURES:  
Two separate channels  
• Crate’s Digital Signal Processing (DSP)  
• Insert jack for connecting external effects  
• CD Inputs for connecting background music  
• Footswitch control of channel selection and DSP on/off  
• Headphones jack for silent operation  
• Internal rechargeable power supply for up to 8 hours of normal play-  
ing 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 indi-  
cates battery okay  
• Can also be powered by an AC wall adapter (supplied) or by a 12 volt  
vehicle car adapter (included – see page 5)  
Tuned port cabinet for extended bass response; 10” woofer and 2”  
Piezo tweeter for full range sound with clear highs  
• Durable black or platinum molded polymer enclosure  
• Rubber feet on three sides – for positioning as a low angle monitor, a  
high angle monitor or as an upright speaker (see below)  
• Stand mount adapter (1-1/2” diameter) for PA use (see below)  
LOW ANGLE MONITOR  
HIGH ANGLE MONITOR  
UPRIGHT SPEAKER  
STAND MOUNTED SPEAKER  
3
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C R AT E  
ABOUT THE POWER SUPPLY:  
The TX50DE 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 (“I”) position. The LED will change to  
red when the battery is low and needs recharging. When this happens,  
turn the amp off, connect the 15-volt charger to the charger jack and  
plug it in. The LED near the charger jack will glow red while the amp is  
charging and goes out when the amp is fully charged. The battery fully  
recharges within 6 hours, providing up to 8 hours of use at low levels,  
about 4 hours of use at moderate levels, and about 2 hours of use at  
continuous full power (sine wave). The battery is rated for up to 1000  
charging cycles. The charger can also function as an AC power supply.  
The battery inside the TX50DE must be fully charged before operating  
the amplifier for the first time. The amplifier leaves our factory with a  
fully charged battery. However, the battery may lose some of its charge  
during transit.  
NOTE: If the battery is drained too low, the Power LED will go out. This  
indicates an exhausted battery – one which may not take a charge. If  
this happens, turn the amp off, connect the 15-volt charger to the  
charger jack and plug it in. If the Charger LED (see #25, page 8) doesn’t  
illuminate, the battery might be beyond recharging. (The TX50DE uses a  
“smart” charging circuit and will not allow you to charge a defective  
battery.) If the battery is serviceable, the LED will illuminate once the  
battery reaches 10 volts – leave the charger plugged in and let the bat-  
tery fully recharge. If the LED never illuminates, the battery may need  
replacing. Contact Crate’s service department:  
SLM Electronics  
1901 Congressional Drive  
St. Louis, MO 63146  
1-800-738-PARTS (7563)  
To avoid damaging the amplifier, do not connect the supplied 15VAC  
charger to the amplifier’s 12VDC Cigarette Lighter Adapter jack.  
Dispose of battery properly.  
4
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C R AT E  
ABOUT THE POWER SUPPLY (continued):  
The TX50DE may also be powered by using a 12-volt vehicle 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 (#26, page 8), then connect the other end of the adapter  
into the vehicle’s cigarette lighter socket. (In some vehicles, the ignition  
switch must be in the “on” or “accessory” position to have power at the  
socket.) NEVER PLUG THE SUPPLIED 15VDC CHARGER INTO THE  
AMPLIFIER’S 12VDC LIGHTER PLUG!  
When using the DC cigarette lighter adapter, the vehicle’s battery will  
keep the amp charged to its own voltage level – if the battery has a  
13.5-volt charge, the amp will charge up to 13.5 volts; if the battery is  
low and only has a 10-volt charge, the amp will discharge down to 10  
volts.  
5
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C R AT E  
THE FRONT PANEL:  
1
2
3
4
5
6
7
9
10  
11  
12 13 14  
15  
16  
1. LOW Z: Connect a low impedance micro-  
phone here by means of a shielded signal cable  
terminated with an XLR type connector.  
9. INSTRUMENT INPUT: Connect an instru-  
ment, tape player, CD player, or high imped-  
ance microphone here by means of a shielded  
signal cable terminated with a 1/4connector.  
2. HIGH Z: Connect a high impedance micro-  
phone here by means of a shielded signal cable  
terminated with a 1/4connector.  
10: GAIN (Active only when the Channel Select  
switch is depressed): Use this control to adjust  
the gain for the instrument channel 1 the  
lower the setting, the lower the amount of dis-  
tortion. As this control is rotated clockwise, the  
distortion increases and the output signal  
becomes louder.  
3. LEVEL: Use this control to adjust the output  
level of the mic channel.  
4. LOW: Use this control to adjust the low fre-  
quency level for the mic channel.  
5. MID: Use this control to adjust the mid fre-  
quency level for the mic channel.  
11: SHAPE (Active only when the Channel Select  
switch is depressed): Use this control to adjust  
the tone of the instrument channel 1. Rotating  
this control counterclockwise enhances mid  
frequencies; rotating it clockwise enhances the  
low and high frequencies.  
6. HIGH: Use this control to adjust the high fre-  
quency level for the mic channel.  
7. DSP SEND: Use this control to adjust the  
amount of Digital Signal Processing (DSP)  
applied to the mic channel.  
12: LEVEL (Active only when the Channel Select  
switch is depressed): Use this control to adjust  
the output level of the instrument channel 1.  
8. INSERT: Use this jack to connect an external  
effects device to the amplifier. This is a stereo  
1/4jack, wired as follows:  
13. CHANNEL SELECT: Use this switch to  
select channel 1 or 2 for the instrument input.  
When this switch is depressed, the Gain,  
Shape, and Level controls (#10 12) are active.  
When this switch is in the out position, the Low,  
Mid, High, and Level controls (#14 17) are  
active. Channel 1 is typically used for electric  
guitars since the Gain control can be cranked  
to produce heavily overdriven distortion.  
Tip = Line In (Return - from effect out)  
Ring = Line Out (Send - to effect in)  
Sleeve = ground  
More information on the Insert jack can be  
found on page 8.  
6
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C R AT E  
8
17  
18  
19  
20  
21  
22 23  
24  
CHO/HALL: Chorus combined with large reverb  
ROOM: Small reverb effect  
14. LOW (Active only when the Channel Select  
switch is in the out position): Use this control to  
adjust the low frequency level for the instru-  
ment channel 2.  
HALL: Large reverb effect  
20. CD INPUT: Use these jacks to connect the  
outputs of a CD player or tape player to the  
amplifier. The output of the CD or tape player  
may need to be attenuated for a suitable mix with  
the input channels see the notes on page 10.  
15. MID (Active only when the Channel Select  
switch is in the out position): Use this control to  
adjust the mid frequency level for the instru-  
ment channel 2.  
16. HIGH (Active only when the Channel Select  
switch is in the out position): Use this control to  
adjust the high frequency level for the instru-  
ment channel 2.  
21. FOOTSWITCH: Use this jack to connect a  
two-button footswitch to the amplifier. The  
footswitch may be used to remotely control the  
Instrument channel selection and turn the DSP  
on and off. The jack is wired as follows:  
17. LEVEL (Active only when the Channel Select  
switch is in the out position): Use this control to  
adjust the output level of the instrument channel 2.  
Tip = Channel Selection  
Ring = DSP control  
Sleeve = Ground  
18. DSP SEND: Use this control to adjust the  
amount of Digital Signal Processing (DSP)  
applied to the instrument channel.  
22. HEADPHONES: Use this jack to connect a  
pair of stereo headphones for private practice  
sessions. The internal speakers are discon-  
nected when headphones are used.  
19. DSP MODE: Use this control to select the  
type of Digital Signal Processing (DSP) effect  
applied to the signal. The nomenclature around  
the control is as follows:  
23. LED: When the power switch is on and the  
battery is fully charged, this LED illuminates  
yellow. The LED illuminates red when the bat-  
tery needs recharging.  
BYPASS: No effect applied  
SLAP: Moderate slapback delay  
DELAY: Moderate delay with regeneration  
ECHO: Long delay with regeneration  
CHORUS: Moderate chorus effect  
ROTARY: Simulated rotating speaker effect  
24. POWER: Use this switch to turn the amplifi-  
er on (top of the switch depressed) or off (bot-  
tom of switch depressed).  
7
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C R AT E  
THE REAR PANEL:  
DC CHARGER  
PLUG  
DC CIGARETTE  
LIGHTER ADAPTOR  
LIT WHEN  
CHARGING  
15V DC  
12V DC POSITIVE  
NEGATIVE  
25  
26  
25. DC CHARGER PLUG, 15VDC: Plug the  
small round connector of the supplied 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.  
26. DC CIGARETTE LIGHTER ADAPTER, 12  
VDC: Plug the small round connector of the  
optional 12-volt car adapter into this jack to  
play the amplifier from a vehicle, instead of  
the internal battery. NEVER connect the  
supplied 15-volt charger to this jack! See  
page 4 for additional information.  
ABOUT THE INSERT JACK:  
The Insert jack (#8) lets you patch external effects into the amplifier just prior to its power amp  
stage, as shown below. Set the mix controls on the external effects units to full effect(100% wet).  
Connecting to the effects  
Connecting to the effect with a  
stereo-to-mono Y-cable:  
Connecting to the effect with a  
insert jack with a stereo cable:  
stereo-to-mono adapter and cables:  
TIP: LINE IN (RETURN)  
TIP: LINE IN (RETURN)  
TIP: LINE IN (RETURN)  
TO  
INSERT  
JACK  
TO  
INSERT  
JACK  
TO  
INSERT  
JACK  
RING: LINE OUT (SEND)  
SLEEVE: GROUND  
RING: LINE OUT (SEND)  
SLEEVE: GROUND  
RING: LINE OUT (SEND)  
SLEEVE: GROUND  
STEREO 1/4" TO  
STEREO 1/4" CABLE  
YPP117  
STP201, 3'  
STP202, 6'  
DUAL MONO 1/4" TO  
STEREO 1/4" ADAPTER  
STP203, 9'  
DUAL MONO 1/4" TO  
STEREO 1/4" Y-CABLE  
MONO 1/4" TO  
MONO 1/4" CABLES  
TO  
TO  
TO  
TO  
TO  
TO  
STANDARD  
INSERT  
INVERTED  
INSERT  
JACK OF  
EFFECT  
MONO  
OUTPUT  
JACK OF  
EFFECT  
MONO  
INPUT  
MONO  
OUTPUT  
JACK OF  
EFFECT  
MONO  
INPUT  
JACK OF  
EFFECT  
JACK OF  
EFFECT  
JACK OF  
EFFECT  
8
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C R AT E  
SUGGESTED SET-UPS:  
The TX50DE 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 and sing, with external effects and backup: Connect a micro-  
phone to the Low Z jack. Connect an instrument (acoustic or electric gui-  
tar, keyboard) to the Instrument Input jack. (This high-Z input works with  
all types of pickups, from Piezo to active types.) Connect a rhythm  
machine to the CD Input jacks. A two-button footswitch may be used to  
select Instrument Channel 1 or 2 and to turn the DSP on and off. Connect  
the external effects device to the Insert jack using one of the methods  
shown on page 8. (Note that the external effect will be applied equally to  
both channels, as well as the CD inputs, so use with discretion.)  
MIC  
LOW Z  
INPUT  
INSTRUMENT  
INSTRUMENT  
INPUT  
EFFECTS  
(SM1-SP)  
INSERT  
CD  
INPUT  
FOOTSWITCH  
(CFP2)  
FOOT  
SWITCH  
RHYTHM MACHINE  
Idea 2 Play along: Connect an instrument (acoustic or electric guitar,  
keyboard) to the Instrument Input jack. Connect a tape player or CD play-  
er to either the CD Input jacks or to the Low Z jack of the remaining  
channel. (See the notes on page 10 for more detailed information.) A pair  
of stereo headphones may be connected to the Headphones jack for pri-  
vacy.  
INSTRUMENT  
INSTRUMENT  
INPUT  
HEADPHONES  
HI Z  
INPUT  
TAPE PLAYER  
CD PLAYER  
CD  
INPUT  
HEAD  
PHONES  
9
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C R AT E  
SUGGESTED SET-UPS (continued):  
Idea 3 Sing along: Connect a low impedance microphone to the Low Z  
jack. Connect a high impedance microphone to the Instrument Input jack.  
Connect a tape player (for sound tracks and back up music) to the CD  
Input jacks. A single button footswitch may be used to turn the DSP on  
and off.  
MIC 1  
MIC 2  
LOW Z  
INPUT  
INSTRUMENT  
INPUT  
CD  
TAPE PLAYER  
INPUT  
FOOTSWITCH  
(CFP1)  
FOOT  
SWITCH  
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 out-  
put level control (if it has one), or by an external attenuator/preamp.  
A tape player or CD player may be connected to either channel instead  
of to the CD Input jacks. This provides control of the gain and equaliza-  
tion of the signal, as well as the application of DSP if desired. In this  
case, the left and right outputs of the tape or CD player must be  
summed to create a mono signal, such as shown below.  
RIGHT  
OUT  
TO INPUT JACK  
CA9Y  
DUAL RCA-TO-MONO  
1/4" ADAPTER  
LEFT  
OUT  
10  
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C R AT E  
SYSTEM BLOCK DIAGRAM:  
SHAPE  
CHANNEL  
INSTRUMENT  
CHANNEL  
SELECT  
1
LEVEL  
GAIN  
2
TONES  
DSP  
SEND  
CD  
INPUTS  
LEVEL  
LOW MID HIGH  
FOOTSWITCH  
DSP/CH. SELECT  
DSP  
RETURN  
(FOOT  
MIC  
CHANNEL  
SWITCH  
ONLY)  
TONES  
DSP  
DSP  
SEND  
LEVEL  
LOW MID HIGH  
MODE  
SPEAKERS  
POWER  
AMP  
HEAD  
INSERT  
PHONES  
POWER SUPPLY  
DC  
CIGARETTE  
LIGHTER  
ADAPTER  
FUSE  
SMART  
CHARGER  
DC  
CHARGER  
CHARGING  
CIRCUIT  
BATTERY  
INDICATOR  
FUSE  
CHARGING  
INDICATOR  
BATTERY  
11  
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C R AT E  
TECHNICAL SPECIFICATIONS  
OUTPUT POWER RATING  
50W RMS @ 10% THD, 4 ohms, 13.6VDC in  
INPUT IMPEDANCE  
1M ohm  
MAXIMUM SIGNAL ACCEPTED  
Mic Low Z  
2V peak to peak  
12V peak to peak  
12V peak to peak  
Mic Hi Z  
Instrument  
GAIN  
Mic  
Instrument  
57dB High Z, 72dB Low Z  
44dB w/Gain switch out, Ch2  
85dB w/Gain switch in, Ch1  
SENSITIVITY  
Mic  
3.5mV RMS High Z, 20mV RMS Low Z  
80mV RMS w/Gain switch out, Ch2  
.8mV RMS w/Gain switch in, Ch1  
400mV RMS  
Instrument  
Line In Insert  
EQS, MIC  
Low  
Mid  
High  
15dB @ 60Hz  
15dB @ 600Hz  
15dB @ 10kHz  
EQS, INSTRUMENT  
Low  
Mid  
12.5dB range @ 80Hz  
18dB range @ 800Hz  
18dB range @ 10kHz  
Crate proprietary circuit  
High  
Shape  
INSERT JACK  
SPEAKERS  
Tip  
Ring  
Line In  
Line Out  
Ground  
Sleeve  
Woofer  
Crate Custom Design 10, 4 ohm, 100 watt  
1.5voice coil, 16 oz magnet  
2Piezo , 4 ohm, 150 watt network  
Tweeter  
POWER REQUIREMENTS  
Internal 12 volt DC power supply  
DC adapter for use with 120VAC  
Optional 12V vehicle lighter adapter  
SIZE AND WEIGHT  
18-1/2W x 13-1/2H x 12-1/2D; 22 lbs.  
The TX50DE is enclosed in a rugged, molded high tech polymer cabinet. Wipe  
the enclosure with a damp, lint-free cloth to remove dirt and road film. Never  
spray cleaning agents directly onto the enclosure, and stay away from abra-  
sive cleansers which could damage the finish.  
Crate continually develops new products, as well as improves existing ones. For this reason,  
the specifications and information in this manual are subject to change without notice.  
©2001 SLM Electronics A division of St. Louis Music  
1400 Ferguson Avenue St. Louis, MO 63133  
P/N 47-099-02 08/01  
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