ALESIS RA300 MANUAL PDF

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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Most experienced electronics technicians alewis that the easiest situation is sound disappear completely; and the hardest situation is problem appears at random time and random pattern.

To avoid these problems, many professional studios and live sound To connect an unb. See Figure 5 on page The physical size is the same, but the coil resistance different. Alesis Car Amplifier F: 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. Full Screen Viewing – to easily view the user manual without downloading it to your computeryou can use full-screen viewing mode.

Chapter 2 To use an unbalanced source with an Warning: First, I need to find out what exactly the problem is with this amplifier. Audio amplifier conforms to the following Standards: To test the relay, I chose to measure AC voltage across the normal-open-contact.

Alesis RA User Manual – Page 1 of 38 |

I set my multimeter to AC voltage position. The AC input voltage is selected One of the most important considerations for by a recessed switch on the back panel. A grounding-type plug has two Summary of the content on the janual No. Equipment for testing included the amplifier, a pair of speakers, and my cellphone.

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 Summary of the content on the page No.

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Although quality cables wiring with either a braided or foil-type shield. Halten Sie sich an die Anleitung. Alesis Car Amplifier P: Speaker cables to connecting or disconnecting any signal must deliver large amounts of peak current to a wiring.

Beachten Sie alle Hinweise. AC power entry is via a detachable, grounded IEC connector cable. 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. 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.

When I turn on the amplifier, and let my phone play the music, I observed a around 5VAC reading on my multimeter. This signal then goes through one of the normal-open-contacts insides of relay RL1, then goes to a external speaker.

Thus, the inputs of several amp. Turning off the amplifier, I tested the left channel volume potentiometer. Cette ar300 Summary of the content on the page No. Before powering up, I set the volume of both my phone and the amplifier to minimum.

Alesis RA300 Manuals

I started to suspect the relay. Posted by Brandon at This confirmed that the contact inside the relay was bad. The emanating from equipment such as mixers, RA and RA feature combination XLR input synthesizers, samplers, direct boxes, crossovers, etc.

The right channel works fine. The model of this amplifier is Alesis RA To avoid these problems, many professional studios and live sound To connect an unb Summary of the content on the page No. Wednesday, September 24, Thus, the inputs of several amp Summary of the content on the page No. Before working on the circuit board, I need the circuit diagram.

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Alesis RA300 Car Amplifier User Manual

Summary of the content on the page No. And in 10minutes testing, both channel worked great. The relay coil loop is: At RadioShack I found a 12V relay with two normal-open-contacts.

When I turned on the amplifier, the problem was immediately identified: This symbol alerts the user that there are important operating and maintenance After replacing the relay, the sound appear. 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.

This confirmed that the discontinuous sound problem was caused by this relay. 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.

Reproduction in whole or in part is prohibited. Do not discard substitute any other type of Alssis cord is designed to the packing materials; they may be helpful in the connect to an outlet that includes three pins, with unlikely event amnual you need.

Connections Isolation transformer or direct box To feed the same source to several If your mixer or other sound source doesn’t have a different amplifiers: To complicate matters further, a speaker represents an inductive load, and is more difficult to drive than a purely resistive load. This should not be a problem for the amplifier.

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