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Car Radio Speaker Power?

TapasNocturne Posted messages 7 Status Membre -  
TapasNocturne Posted messages 7 Status Membre -

Hello,

Let me explain, I have a car radio of 4×50w and Pioneer speakers with a nominal power of 40w and a maximum power of 300w.

Is this dangerous?

Can I put in more?

I don't know anything about this, thank you in advance for your answers.

4 réponses

Réponse 1 / 4
vieu bison boiteu Posted messages 44334 Registration date   Status Contributeur Last intervention   Ambassadeur 3 591
 

hi

it's the ohmic resistance that also needs to be considered = the speakers must have an input resistance (at least equal to) greater than the output resistance of the amp

example = amp output 4 / 6 ohms = speaker inputs 8 ohms and above

bye+
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Réponse 2 / 4
TapasNocturne Posted messages 7 Status Membre 3
 

Hello,

first of all, thank you for your reply. I just checked the speakers, and it says 4 ohms, and for the car radio, it says 4 to 8 ohms. Can you give me more information?
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brucine Posted messages 24397 Registration date   Status Membre Last intervention   4 099
 

Hello,

Aside from the purely material aspect, I find the question surprising.

The maximum power estimated for achieving good sound quality in a car is 15W per channel due to the small volume of the cabin.

Beyond that and for higher power levels, you may have to lower the volume, resulting in a lower sound quality compared to a less powerful system set at its optimal volume, not to mention the risk to your ears and road safety in general, as you won't hear the surrounding noises anymore.

While it's one thing for the impedance of the speakers to match that of the amplifier, why would you want to further increase the power of the speakers knowing that, in principle, the amplifier itself will not be used at its full power?

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TapasNocturne Posted messages 7 Status Membre 3 > brucine Posted messages 24397 Registration date   Status Membre Last intervention  
 

Hello,

I am replying to your comment,

Everyone is free to do what they want in terms of sound level as long as the lives of other users are not taken into account, right?

What is the problem?

If I want my ears to bleed, that's clearly my problem, right?

Anyway, I don’t understand your comment.

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Andy31200 Posted messages 26918 Registration date   Status Modérateur Last intervention   12 197 > TapasNocturne Posted messages 7 Status Membre
 

"It's clearly my problem, isn't it?"

Indeed, but please note that you can be fined for excessive noise levels, among other reasons, that you cannot hear what is happening outside.

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vieu bison boiteu Posted messages 44334 Registration date   Status Contributeur Last intervention   3 591
 

"on the speakers, it says 4 ohm impedance and for the car radio, impedance is 4 to 8 ohms"

- for the speakers, you need at least 8 ohms of impedance.

- if you have already bought them, you will need to wire them in series; they will be in mono sound (not in stereo).

in a moving car, stereo ???

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labricole47 Posted messages 5406 Registration date   Status Modérateur Last intervention   442 > TapasNocturne Posted messages 7 Status Membre
 

The offense related to the emission of disturbing noise from car radios does not fall under the highway code but under the public health code (Article R482.1)

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Réponse 3 / 4
Jojolaguitare Posted messages 12012 Registration date   Status Membre Last intervention   2 781
 

Hello.

If the power stated for the car radio is actually 4 X 50 watts, RMS or nominal watts, the 40 watt nominal speakers are likely to struggle and distort at full power.

So it's better to replace them with 70 watt RMS speakers. However, if the watts claimed for the car radio are bogus and it actually only produces 4 X 25 watts (for example), the 4 speakers rated at 40 watts will be sufficient.

As a reminder, so-called Musical, Din, Peak, Crête, programmed, Maxi watts, and especially PMPO watts (power X 10) should never be considered. Only the watts called RMS, nominal, or Effective are recognized.

See you . . .
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TapasNocturne Posted messages 7 Status Membre 3
 

Hello,

thank you for your response, you say that the rms are better so I'm going to express it like this ????

The car radio has 28×4 w rms

And the speakers are 40 w rms

Can you give me more info please?

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Jojolaguitare Posted messages 12012 Registration date   Status Membre Last intervention   2 781 > TapasNocturne Posted messages 7 Status Membre
 

<<< The car radio is 28×4 w rms >>>

These numbers are more credible. So there's no problem with compatibility with your 40 watts RMS 4 Ω speakers.

Moreover, off-topic but agreeing entirely with Brucine, whom I greet, 4 X 15 watts RMS is more than enough in such a small cabin. And as long as the efficiency of the speakers (high-end) reaches 94 dB / w / m (generally 88 / 90 dB for car radio speakers), a power of 4 X 8 watts from the car radio would be more than sufficient. Indeed: + 3 dB for a speaker doubles the auditory power.

See you...

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TapasNocturne Posted messages 7 Status Membre 3 > Jojolaguitare Posted messages 12012 Registration date   Status Membre Last intervention  
 

So would it be possible to replace the original speakers in my dashboard with 25w RMS pioneers for better sound quality?

And the problem is that car radios nowadays are all 4×28 w RMS, right?

I know mine is terrible, it's a Norauto car radio ????

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labricole47 Posted messages 5406 Registration date   Status Modérateur Last intervention   442 > TapasNocturne Posted messages 7 Status Membre
 

Hello

Back in the tuning days, car radios and amplifiers gave us 2000 watts

which led me to find myself in front of a fast-moving ambulance with its siren wailing; that I didn't hear

and now I'm stuck with tinnitus for life

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Réponse 4 / 4
TapasNocturne Posted messages 7 Status Membre 3
 

Sorry for you, but that's not the point; I turn up the volume out of frustration. I'm just asking to change the original speakers, which are horrible.
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