Radio Shack Speaker PASC12 User Guide

Owner’s Manual  
PASC12  
PASC15  
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parallel, which allows you to daisy chain additional speakers. Thus you can  
use one amplifier channel to power multiple speakers.  
Make certain that the wires you are using are at least 12 gauge  
unshielded speaker cable (the lower the number, the thicker the wire). Do  
not use shielded “instrument” cables.  
Hooking speakers up in parallel decreases the overall  
impedance, placing a greater load on the amplifier. Check your  
amplifier’s specifications to ensure that you are not overloading  
the channel.  
CAUTION: DO NOT USE MORE THAN ONE JACK AS AN  
AMPLIFIER INPUT. DOING SO WILL DAMAGE THE SPEAKER!  
Amplifier Requirements  
Check the product specifications (page 5) to see the power handling  
for your model. There are a couple of considerations to keep in mind when  
choosing an amplifier to drive your PASC series speaker. While it is true  
that an amplifier with a higher power rating can damage the drivers, under-  
powering can be even more dangerous. When an amplifier is overdriven and  
starts distorting, it generates transient frequencies that are much louder than  
the program material. These wayward frequencies could damage your  
speaker. A proper match is an amplifier which could drive the speaker up to  
the cabinet’s RMS rating, without exceeding the amplifier’s own RMS level.  
Operation  
When powering on your equipment, make sure the volume level on  
the amplifier is turned all the way down. This is to avoid the “popping”  
noise, which could damage your speaker.  
The placement of speakers can be a bit tricky. This is especially true  
to monitors as they are more susceptible to feedback. Being that a monitor is  
meant to face the performers, the chances of feedback are much greater. The  
trick is to place the monitor outside the microphone’s pickup pattern. For  
most microphones the best position is directly behind the mic. Supercardioid  
mics however, do not reject sound from the back very well, but do have a  
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narrow pickup pattern. You should therefore place the monitor in the rear,  
but at a slight angle.  
High frequencies are unidirectional while low frequencies are omni  
directional. Being that this is a full range enclosure, it is important that the  
speaker be placed so that the high frequencies reach the intended listeners  
properly. Make certain that no person or object could come to interrupt the  
line-of-site between the loudspeaker and the performers.  
When using more than one loudspeaker, you have to account for  
phase alignment. When the speakers are close together this is not usually an  
issue. However, when they are far apart, the sound from one speaker may  
reach the ear a fraction of a second before the other. This will cause certain  
frequencies to cancel out, resulting in a hollow sound. To avoid this, you  
may have to use a delay processor to align the sound from the speakers.  
Maintenance and Safety  
Do not expose the speaker to moisture.  
Avoid hot and cold temperature extremes.  
Clean using a damp cloth. Make sure that no moisture contacts the  
drivers. You can use a hand vacuum to clean the carpet.  
Do not attempt to service the unit. Refer service to a certified Pyle Pro  
technician.  
This loudspeaker is capable of producing extremely high SPL levels.  
Use earplugs when necessary.  
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Troubleshooting  
No Sound:  
VCheck connections  
VTry a different speaker cable  
VCheck levels on amplifier  
VConfirm amplifier is getting a signal (check signal LED, or use  
headphone output)  
Intermittent Output:  
VCheck connections  
VTry a different speaker cable  
Weak Bass:  
VCheck the polarity of the speaker connection. It may be reversed.  
VListen with headphones to confirm the amplifier is being sent a good  
signal.  
Distorted Sound:  
VCheck if the amplifier is overdriven. If it is, you will have to turn the  
level down.  
VMake sure you are not exceeding the RMS rating of your speaker.  
Specifications  
Frequency  
Range  
Sensitivity  
(1w/1m)  
Model  
Woofer  
Tweeter  
RMS  
Peak  
Connections  
Dimensions  
W = 25.6“  
Weight  
37.5 lb.  
10“ x 18“  
Titanium  
Super Horn  
Speakon (2)  
³(2)  
—Quick Connect“  
(Wire Lead & Banana)  
12“  
Kapton  
Voice Coil  
PASC12  
40-20 kHz 300W 600W  
35-20 kHz 400W 800W  
101 dB  
102 dB  
8Ω D = 17.3“  
H = 13“  
Midrange/Tweeter  
10“ x 18“  
Titanium  
Super Horn  
Speakon (2)  
³(2)  
—Quick Connect“  
(Wire Lead & Banana)  
15“  
Kapton  
Voice Coil  
W = 27.5“  
8Ω D = 17.3“  
H = 13.4“  
PASC15  
44 lb.  
Midrange/Tweeter  
5
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Typical Setup  
Parallel Setup  
6
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Recommended Accessories  
PT Series  
Amplifiers  
PPJJ30  
°
Professional High-Power  
°30ft. 12 Gauge  
amplifiers  
°Professional Speaker Cable  
°³“ to ³“  
°
°
8 Models to choose from  
All models rack-  
mountable  
in standard ISO 19“ rack  
PPJJ15  
°
Same as above 15ft.  
PPSS30  
°30ft. 12 Gauge  
PZR Series  
Amplifiers  
°Professional SpeakerCable  
°Speakon to Speakon  
°
Professional High-Power  
amplifiers  
PPSS15  
°
°
3 Models to choose from  
All models rack-  
mountable  
°Same as above 15ft  
in standard ISO 19“ rack  
PPSJ30  
°30ft. 12 Gauge Professional  
°Speaker Cable  
°Speakon to ³“  
PPSJ15  
°Same as above 15ft.  
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