Crate Amplifiers Stereo Amplifier CA15 User Manual

CA15  
Acoustic Amplifier  
User’s Guide  
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CA15 Acoustic Amplifier  
The Front Panel:  
1
2
3
4
5
6
7
8
9
10  
11  
1,3: Input 1, Input 2. The signal output from 9: CD Input. Use these jacks to connect the  
your acoustic instrument, tape player,  
rhythm machine, high-Z microphone or  
other source may be connected to either or  
both of these jacks by means of a shielded  
signal cable. Each of the input jacks is  
governed by its corresponding gain con-  
trol (#2 for Input 1, #4 for Input 2). The  
signals from these two jacks are summed  
together after their gain stages.  
output from a CD player, tape deck, or  
rhythm machine to the amplifier. The CD  
Input jacks are post EQ and Gain, so use  
the level control on the CD player (etc.) to  
adjust the level of the signal at these jacks.  
10: Headphones. Use this jack to connect  
headphones to the amplfier. The internal  
speaker is disconnected when this jack is  
used.  
2,4: Gain 1, Gain 2. Use these controls to set  
the input gain level for the corresponding  
input jack. These controls set the level of  
the input signal and serve as the amplifi-  
er’s volume controls.  
5: Low. This serves as the bass control for  
both channels. Adjust this control to get  
the best sounding bass response for your  
instrument. Excessive boost of the low  
control can cause an unnatural howling  
(acoustic feedback from your instrument)  
and should be avoided.  
6: Mid. This serves as the midrange control  
for both channels. Adjust this control to  
get the best projection and midrange  
tones for your instrument.  
7: High. This serves as the treble control for  
both channels. Adjust this control so your  
high notes and harmonic overtones are  
lively but not overpowering.  
11: External Speaker. Use this jack to connect  
the amplifier to an external speaker. The  
internal speaker is disconnected when  
this jack is used. The impedance of the  
external speaker must be 4 ohms or  
greater. Do not attempt to use head-  
phones in the External Speaker jack!  
Permanent hearing damage could result.  
12: Power Switch. (Rear panel, not shown)  
Use this switch to apply power to the  
amplifier: the amp is on when the top of  
the switch is depressed, off when the bot-  
tom of the switch is depressed. The switch  
illuminates when the amp is on.  
13: AC Line Cord. (Rear panel, 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 voltage,  
power, and frequency requirements stated  
on the rear panel. Do not attempt to  
defeat the safety ground connection.  
8: Reverb Level: Use this control to adjust  
the amount of reverberation added to the  
signal. In the fully counter clockwise posi-  
tion, the signal is dry (no reverb added).  
As you rotate the control clockwise the  
amount of reverb increases.  
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CA15 Acoustic Amplifier  
Technical Specifications:  
Output Power Rating: 12+ watts RMS @ 5% THD, 4 ohm load  
Low: 15dB @ 80Hz  
Mid: 15dB @ 650Hz  
High: 15dB @ 10kHz  
Input Impedance: 1.5M ohm  
Max Input Signal: 7v peak to peak  
Total System Gain: 52dB @ 1kHz  
Input Sensitivity: 20mV  
Internal Speakers: 8” Crate Custom Design, 4 ohm, 15 watts; Piezo Tweeter  
Power Requirements: 120VAC, 60Hz, 30VA  
100/115VAC, 50/60Hz, 30VA  
230VAC, 50/60Hz, 30VA  
Size and Weight: 14”H x 14”W x 12”D, 21 lbs.  
System Block Diagram:  
CHANNEL 1:  
POWER AMP  
EQ  
EXTERNAL  
SPEAKER  
INPUT  
GAIN  
GAIN  
REVERB  
LEVEL  
LOW MID HIGH  
REVERB  
SPEAKER  
CHANNEL 2:  
INPUT  
CD  
INPUT  
HEAD  
PHONES  
ATTENUATOR  
Declaration Of Conformity  
#33, Effective 01-01-2001  
SLM Electronics  
Manufacturer’s Name:  
Production Facility:  
1901 Congressional Drive, St. Louis, MO 63146, USA  
700 Hwy 202 W, Yellville, AR 72687, USA  
1400 Ferguson Ave., St. Louis, MO 63133, USA  
1400 Ferguson Ave., St. Louis, MO 63133, USA  
Production Facility:  
Shipping Facility:  
Office Facility:  
Product Type:  
Audio Amplifier  
Complies with the following Standards:  
Safety:  
EMC:  
EN60065, E60065, C22.2, UL6500 and/or UL813  
Directive 89/336/EEC, EN55103, EN55013, EN61000,  
and/or FCC 47CFR 15B clA  
Supplementary information provided by:  
SLM Electronics - R & D Engineering  
1901 Congressional Drive, St Louis, MO 63146, USA  
Tel.: 314-569-0141, Fax: 314-569-0175  
Specifications and information in this manual are subject to change without notice.  
©2004 SLM Electronics • A Division of St. Louis Music Co.  
1400 Ferguson Avenue • St. Louis, MO 63133  
47-936-01 • 022404  
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