® Studio PRO High Performance Professional Audio MODEL:PA105/PA205 PA AMPLIFIER www.pyramidcaraudio.
INTRODUCTION Your New PYRAMID PA105/PA205 PA AMPLIFIER gives you the power and versatility you need in a professional sound system. The amplifier's wide frequency response makes it suitable for amplifying music or vocal program material. It can be used for live bands, office paging systems, public announcements, or a variety of other installations. Please read this manual throughly before you attempt to set up and use the amplifier.
FRONT PANEL - PA105/PA205 1.Power On/Off 2.Phone Jack Lets you connect a pair of stereo headphones for private listening or cueing (monitoring) sound prior to "airing" it. 3.MIC 1 & MIC 2 Jack Allows you to connect up to two 6.35mm type microphone. 4.LED Level Display Meter 5.Three Input Sources Mixing Controls Controls the sound level for each of the audio input sources. PHONO/AUX Allows you to select and connect an alternative high level (AUX/CD) or low level (PHONO) audio sound source. 6.
REAR PANEL - PA105/PA205 9.Voltage Switch The amplifier has selectable input voltage from 110V/60Hz which is the standard in USA and CANADA. You can also switch the input voltage to 220V/50Hz for EUROPEAN operation. Please make sure the switch is in the proper position before operating, otherwise severe damage will result not cover by the warranty. Please also replace the fuse with proper rating in this situation (see the SPECIFICATIONS for the fuse rating). 10.Unswitched AC Accessory Outlet - 300W MAX.
To begin with, in order to ensure equal volume from each speaker, all connected speakers should have the same impedance. A proper total impedance with the 4 to 16 Ohms range can be achieved by combining series and paralled speaker connections. Please see the diagrams which follow the same impedance. Finally, always use the shortest length of speaker wire possible of proper gauge. Usually, 18-gauge wire is adequate for lengths under 25 feet, while 16-gauge is used for greater lengths.
NOTE: ADDITIONAL SPEAKERS MAY BE INCLUDED IN SERIES, BUT IT IS NECESSARY TO CALCULATE TOTAL IMPEDANCE, AND CONNECT THE SPEAKER CIRCUIT TO A TERMINAL OF APPROPRIATE IMPEDANCE. FOR EXAMPLE, IF THREE SPEAKERS OF 4-OHM ARE USED, TOAL IMPEDANCE IS 12 OHMS, YOU SHOULD CONNECT TO THE 16-OHM TERMINAL. 4.Connect the speakers' (-) terminals to the amplifier's COMMON terminal. 5.
4.Connect the speaker's (-) terminals to the transformer's COMMON tap on the secondary side. See the chart below for some samples system suggestions: COMBINATION OF ONE SERIES PAIR AND ONE PARALLEL PAIR IN PARALLEL SERIES TO ONE SPEAKER PAIR (net impedance) PARALLEL TO ONE SPEAKER PAIR (net impedance) TOTAL IMPEDANCE COMBINING TWO PAIRS IN PARALLEL Use this amp terminal 8-OHM + 8-OHM (16 OHMS) 8-OHM + 8-OHM (4 OHMS) 3.2 OHMS 4-OHM 16-OHM + 16-OHM 8-OHM + 8-OHM (32 OHMS) (4 OHMS) 3.
THE VEHICLE USING FOR THIS POWER SOURCE MUST HAVE A NEGATIVE GROUND ELECTRICAL SYSTEM. IF YOU ARE NOT SURE OF IT, PLEASE CHECK WITH YOUR VEHICLE'S DEALER. Specifications Output Power at THD 10%, 1 kHz ......................................20W (PA105)/40W (PA205) Maximum Power ....................................80W (PA105)/120W (PA205) THD at 1W, 1 kHz Low-Pass Filter MIC 1...................................................................1% MIC 2............................................................
