Question about Recoton Advent Advent AS2 Main / Stereo Speaker

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Advent AS2 speaker impeadance

I have a pair of Advent AS2 speakers. They sound great, but I have blown amplifier outputs on 2 seperate receivers with them. I measeured the Impeadance on the woofers alone, and they are producing a 4 - 4.5 ohm reading. The tweeter produces a 6ohm reading. I removed the jumper plug on the rearspeaker binding posts (for bi-amp) and took another reading...4 ohm on the woofers at the woofer terminals, and no reading on the tweeter terminals. The rear of the speaker cabinet says 8 ohm ! Am I crazy?? The speakers sound awesome, now hooked up to a 4ohm Samson 85 watt per channell amp. I also placed a tone generator on both sets of terminals...bottom post produces tone for both woofers, and the top terminals produce tone through the tweeter.

Help!

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2 Suggested Answers

  • 4234 Answers

SOURCE: Lost woofer in one cabinet.

I'm not familiar with your specific model, but some of these have fuses for the woofers. Check for a blown safety fuse. Also, verify that the connections to the crossover board are in good shape. These crossovers are not that complex and don't usually fail. Keep us posted on what you find.
Dan

Posted on May 29, 2008

davedstone
  • 11 Answers

SOURCE: The line fuse blows on power up. Input impeadance

Ohms law I=V/R which is 240vac divided by 3 ohm = 80 amps. Dead short which is either the windings, or the mains filter capacitor which has gone short circuit which is more the likely culprit. This is on the output side of the fuse. If you have a meter switched to ohms and measure across this capacitor you will read zero ohms (dead short) which confirms the capacitor. Disconnect one side and if the short goes, then it's the cap, if not, it's the transformer.

Posted on Sep 12, 2009

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After 5 min. working time(5 min after the receiver was switched on) the sound from the left speaker disappear.(no matter which surround mode i use). Any idea?Thanks


The simplest way to trouble shoot is to swap the speaker connections at the back of the amplifier. If the problem follows the speaker than a connection, possibly internal to the speaker fails as the speaker warms up(voice coil).
If this swap indicates that the amplifier is the problem swap the channel inputs to confirm that it is internal to the amplifier. Also try a different source to confirm it is not the output of the source.

If not, than the amplifier would appear to have a problem. This would most likely require a qualified technician to repair.

Tthese amps are robust and you may have to choose an alternative speaker pair(example sub-room or speaker set 2) to maintain the set up you have. Also a internally shorted speaker may have the impedance low forcing an output protection feature.
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I'm trying to run advent as2 speakers with a kenwood vr5900 receiver but they are clipping


You can not do that, it will result in catatrophic failure in the output stage which will prove very costly if you continue.

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Distorted sound from headphone jack


If possible try with another pair of headphones. If speaker outputs are ok, probably indicates a faulty output of headphone amp, if is seperate circuitry from speaker output.

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1 Answer

How do you connect the back cables so the sound will come out right


There are four posts - two black and two red. They should be connected together, as shown in the picture. If you are missing the brass straps, simply use wire to reconnect the posts, black-black and red-red.

Then it's a simple matter of connecting the red (+) amplifier output to one of the red terminals, and the black (-) amplifier terminal to the black terminal on the KEF.

The KEF terminals can be seperated if you wish to "biamp" or "biwire" these speakers. Each black/red pair is dedicated to either the bass or the treble. For higher fidelity, some listeners prefer to run seperate wires from a single amplifier channel to each individual speaker input.clmrt5000_5.jpg

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Does it play normal on any sources, or do you only have the tuner and CD for available sources?

There are many different things that can cause this type of problem.

It could be bad solder connections on in the amplifier circuit or power supply, it could be a bad speaker or a bad output channel inside the receiver if this happens only when it gets turned up loud.

The overload warning happens when the amplifier circuit has excessive current or DC voltage on the outputs. Unfortunately the only way to determain if it is the speakers is to change them with other known good speakers and see if it still happens. But before buying any speakers you need to have the receiver ruled out as the source of the problem.

It can also go into overload if you have the wrong type of speakers connected, or too many speakers connected. Each speaker jack should only have one speaker connected toit. If you are using for example, 4 speakers connected to the "A" speaker jacks meant for just 2 speakers, it will create a load to the amplifier that the amplifier is not rated for.
Look on the back of the receiver and it will have listed the proper impeadance for your receiver. Most will say:

8 ohms or more "A" or "B" speakers
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That means you must use 8 ohm or higher ohm rated speakers if you are using only speakers"A" or only speakers "B", but can not use 8 ohm speakers if you are using speakers "A" and "B" at the same time. Then they must be 16 ohm speakers.

Two 8 ohm speakers in one speaker jack is a 4 ohm load, that is why you can not use more than 1 speaker per speaker jack.

I hope you found this information useful, and if I can be more help just let me know.

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1 Answer

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It sounds like you have a bad speaker on the zone 2, or you have the speakers connected improperly.

When you engage the zone 2 a relay clicks and the speakers then become part of the amplifiers circuit.

If the problem was in the amplifier, it would go into protect mode without even having speakers connected to it.

If the speakers all check good, you most likely have the wrong type of speakers, meaning the impeadance is too low, or you have too many speakers connected to it.

On the back of the Denon, you will see right around the speaker output jacks, what ratings the speakers should be. If I remember correctly, it says 6 ohms or more when using only "A" or "B", and it says 12ohms or more for "A" + "B".

If you have two 8 ohm speakers on the same speaker jack you now have a 4 ohm load. That is below the ratings and can cause the amp to shut down (go into protect). Since your amp shuts down right away, I think you have a bad speaker or way too many speakers connected.

I have seen many times when people will connect 2 or 4 speakers to the one of the outputs that are designed for only 1 speakers.

If you are using too many speakers you will need a speaker distribution box. It has a resistor network built into it so the amp never sees a lower impeadance than what it is designed for.
You can connect 4, 6 or 8 speakers to one set of outputs designed for 2 speakers. You do loose a lot of power to the speakers, but it is better than blowing up your amplifier.

If I can be of any further help, let me know.

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