a few quick questions...please

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a few quick questions...please

jonnyfiat

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Jan 25, 2006
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Hi, this seems like a really good forum, lots of people who know what they are talking about (so i have a few questions for you)!!

I have a JVC GD611 headunit (50 watts) and Vibe SA-B60 speakers and tweeters, when i have the head unit at about two thirds of the volume it starts distorting the bass, why is this? Surely it should stay clear to near the peak of its volume, like all other amplifiers i have used in the home? Will an amp on the speakers make and difference and why?

Also as the punto is stadard with tweetes and midrange speakers does this mean there is a crossover installedcin the existing wiring or was it in the old head unit? (if one was installed at all) I need to know so i know whether to bother putting my crossover in.

Cheers for any help, Jon
 

wozza

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Mar 4, 2005
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Thats 50watts PMPO

Typically between 15- 25w rms depending on the brand my 50w x 4 alpine is only 18w rms per channel.

as a result when you have speakers that are designed to take 60w rms at higher volumes its not putting enough power into it so it will start to clip.

Putting an amp on it will give it clearer power a better sound and more volume because you will be putting more power into it.


About the crossovers put them in regardless the ones that came with your new speakers are designed to split it into frequencies that they like. The standard one might be different etc. Should always install the crossovers that come with the components you buy.
 

CinquePunto

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jonnyfiat said:
Hi, this seems like a really good forum, lots of people who know what they are talking about (so i have a few questions for you)!!

I have a JVC GD611 headunit (50 watts) and Vibe SA-B60 speakers and tweeters, when i have the head unit at about two thirds of the volume it starts distorting the bass, why is this? Surely it should stay clear to near the peak of its volume, like all other amplifiers i have used in the home? Will an amp on the speakers make and difference and why?

Also as the punto is stadard with tweetes and midrange speakers does this mean there is a crossover installedcin the existing wiring or was it in the old head unit? (if one was installed at all) I need to know so i know whether to bother putting my crossover in.

Cheers for any help, Jon

speakers usually vibrate at higher volumes for various reasons... the fact is that they are not in tuned enclosures as in home stereo's, instead they are "free-air" so they cannot work properly.

Secondly, with the original speakers, there is a resistor in the tweeter unit, which cuts out the bass frequencies, although the main speaker will usually handle all the frequencies.
 
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jonnyfiat

jonnyfiat

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Joined
Jan 25, 2006
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2
So basiclly what your saying is that if i get an amplifier it will make the problem worse? I will fix some more screws in really tighten them up to secure the speakers and see if that makes any difference.

Cheers for the reply.
 

CinquePunto

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jonnyfiat said:
So basiclly what your saying is that if i get an amplifier it will make the problem worse? I will fix some more screws in really tighten them up to secure the speakers and see if that makes any difference.

Cheers for the reply.

no, the problem is not tight/ not screws, it is the fact that there is no sealed airspace behind the speaker or the volume of air is too large. In home stereo's the speakers are in sealed boxes, so can go louder without distorting...
 

H2DaE

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An amplifier won't make the problem worse, it will make the sound a lot clearer, so you can put the speakers up louder before it clips and it uses them to their full potential. Nothing worse IMO than a nice sub with rubbish sounding speakers (n)
 

chaos

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Jan 16, 2005
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An amp will improve any speaker as long as it doesn't massively overpower it :)

As has been said before, there could be a multitude of reason why you are getting distortion and I think the others have pretty much nailed the potential problems on the head :) Another reason for 'bad' bass is that the mounting surface is flexing. This can't be cured without reinforcement. A bit of dynamat or another sound deadening product would help stiffen the mounting surface (y)
 
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