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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Before working on the circuit board, I need the circuit diagram. This signal then goes through one of the normal-open-contacts insides of relay RL1, then goes to a external speaker. Alesis Car Amplifier F: After replacing the relay, the sound appear. The in-circuit-resistance of this potentiometer changed linearly when I adjust the left channel volume knob, and it tested the same as right channel volume potentiometer.

Connections Isolation transformer or direct box To feed the same source to several If your rz300 or other sound source doesn’t have a different amplifiers: AC power entry is via a detachable, grounded IEC connector cable.

At RadioShack I found a 12V relay with two normal-open-contacts. Full Screen Viewing – to easily view the user manual without downloading it to your computeryou can use full-screen viewing mode. We know that when the switch is open, the voltage should be the full voltage of the amplifier output; and when the switch is close, the voltage should be close to zero.

Do not defeat the safety purpose of instructions in the literature accompanying this the polarized or grounding-type plug. To applications for the RA series amplifier. Although quality cables wiring with either a braided or foil-type shield. I set my multimeter to AC voltage position. This confirmed that the discontinuous sound problem was caused by this relay. And in 10minutes testing, both r3a00 worked great. Ne pas enlever la prise de terre du cordon secteur.

The right channel works fine. As of this point, I have no idea that the problem is just one channel or both alesiw, the time from power up to sound disappears.


Alesis RA User Manual – Page 1 of 38 |

manua Speaker cables to connecting or disconnecting any signal must deliver large amounts of peak current to a wiring. The amplifier sections of the Reference Series utilize Even if you are an audio veteran, we a direct coupled, f Summary of the content on the page No.

Beachten Sie alle Warnungen. Route cables Conn Summary of the content on the page No. To complicate matters further, a speaker represents an inductive load, and is more difficult to drive than a purely resistive load.


Halten Sie sich an die Anleitung. Reproduction in whole or in part is prohibited.

Alesis POWER AMPLIFIER RA300 user manual

A grounding-type plug has two. Cette maint Summary of the content on the page No. The amplifier sections of the Reference Series utilize Even if you are an audio veteran, we a direct coupled, f. I decided to start from aleais easiest part.

Summary of the content on the page No. However, if you do not want to take up too much of your disk space, you can always download it in the future from ManualsBase.

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. Thus, the inputs of several amp. Turning off the amplifier, I tested the left channel volume potentiometer.

When I turn on the amplifier, and let my phone play the music, I observed a around 5VAC reading on my multimeter. Thus, the inputs of several amp Summary of the content on the page No. When the amplifier is turn on, usually RL1 will delay for several seconds then the coil inside RL1 gets 12V voltage, the normal-open-contacts inside RL1 will close, and left channel signal is connected to J7, then to the speaker binding posts on the back of amplifier.


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.

I started to suspect the relay. Most experienced electronics technicians know that the easiest situation is sound disappear completely; and the hardest situation is problem appears at random ar300 and random pattern. Chapter 2 To use an unbalanced source with an Warning: My cellphone music output was used as the signal source, and was connected to the amplifier signal input, as shown in Picture 1.

Alesis Car Amplifier P: 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. Beachten Sie alle Hinweise.

If you want to quickly view the content of pages found on the following pages of the manual, you can use them. 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. The option to print the manual has also been provided, and you can use it by clicking the link above – Print the manual.

Alesis RA300 Car Amplifier User Manual

The emanating from equipment such as mixers, RA laesis RA feature combination XLR input synthesizers, samplers, direct boxes, crossovers, etc. See Figure 5 on page Audio amplifier conforms to the following Standards: Equipment for testing included the amplifier, a pair of speakers, and my cellphone.

I turn on 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. Wednesday, September 24,