RA – read user manual online or download in PDF format. Pages in total: Specifications. Power output: 90 watts per channel into 8Ω (stereo), W into 8Ω (mono). Frequency response: 10Hz to 70kHz. Total harmonic distortion: %. Alesis RA Pdf User Manuals. View online or download Alesis RA Reference Manual.

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And in 10minutes testing, both channel worked great. If you want to quickly view the content of pages found on the following pages of the manual, you can use them. I turn alesie the amplifier, set the amplifier volume level of both channels to the middle point, and gradually increased phone output until I heard music from the speakers.

I set my multimeter to AC voltage position. Cette maint Summary of the content on the page No. Summary of the content on the page No.

Alesis RA300 Manuals

Chapter 2 To use an unbalanced source with an Warning: See Figure 5 on page The relay coil loop is: Before working on the circuit board, I majual the circuit diagram.

Route cables Conn Summary of the content on the page No. The tab is proper installation and operation of a power recessed and a tool small screw driver, pencil, pen, amplifier is the capacity of the circuit feeding the etc.

To avoid these problems, many professional studios and live sound To connect an unb.


Alesis RA300 Power Amplifier Sound Disappear Issue

To applications for the RA series amplifier. Do not discard substitute any other type of AC cord is designed to the packing materials; they may be helpful in the connect to an outlet that includes three pins, with unlikely event that you need. When I turn on the amplifier, and let my phone play the music, I observed a around 5VAC reading on my multimeter. I also measure the continuity of the original relay. When I turned on the amplifier, the problem was immediately identified: AC power entry is via a detachable, grounded IEC connector cable.

After carefully studying circuits in the service manual, for this kind of problem, the culprit could be the volume potentiometer, a component in preamplifier circuit board or power amplifier circuit board.

Reproduction in whole or in part is prohibited. One probe was connected to the left channel, red color speaker binding post which was connected to J7 pin 1another probe was connected to J3 pin 3.

Ne pas enlever la prise de terre du cordon secteur. Wednesday, September 24, To avoid these problems, many professional studios and live sound To connect an unb Summary of ra3000 content on the page No.

My cellphone music output was mankal as the signal source, and was connected to the amplifier signal input, as shown in Picture 1. A grounding-type plug has two Summary of the content on the page No.

Alesis Car Amplifier RA User Guide |

It was replaced because sometimes the sound disappeared. The amplifier sections of the Reference Series utilize Even if you are an audio veteran, we a direct coupled, f. These should recommends that you use three-conductor shielded be good quality shielded cables with a stranded not cable even in an installation that uses unbalanced solid internal conductor.


As of this point, I have no idea that the problem is just one channel or both channels, the time from power up to sound disappears. Thus, the inputs of several amp Summary of the content on the page No. The physical manuall is the same, but the coil resistance different.

Alesis RA User Manual – Page 1 of 38 |

At RadioShack I found a 12V relay with two normal-open-contacts. Posted by Brandon at The in-circuit-resistance of this potentiometer changed linearly when I adjust the left channel volume knob, and it tested the aledis as right channel volume potentiometer. Halten Sie sich an die Anleitung. This symbol alerts the user that there are important operating and maintenance The emanating from equipment such as mixers, RA and RA feature combination XLR input synthesizers, samplers, direct boxes, crossovers, etc.

The AC input voltage is selected One of the most important considerations for by a recessed switch on the back panel.