Sound-speaker guru needed!

[miiser]

I want to ask something else.
It might sound crazy but..
Can I plug a woofer from a home cinema in one of the front door's wirings? And then drive it under a seat and plug it to solve the bass issue?
Sorry If it's idiotic to ask



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[David C]

Originally Posted by miiser

I want to ask something else.
It might sound crazy but..
Can I plug a woofer from a home cinema in one of the front door's wirings? And then drive it under a seat and plug it to solve the bass issue?
Sorry If it's idiotic to ask



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A home cinema speaker is still a speaker. As long as it have the same impedance (4 ohm) as your other speakers and that you can send enough power to it (either from an amp or if the woofer as a built in amp), it will work.


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[miiser]

Originally Posted by David C

A home cinema speaker is still a speaker. As long as it have the same impedance (4 ohm) as your other speakers and that you can send enough power to it (either from an amp or if the woofer as a built in amp), it will work.


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So to sum up, my headunit can handle another 2 speakers (2 in front, 2 tweeters in the pillar and 2 on the rear) as long as they are 4 ohms ?
That's the only thing I have to look for?

So this one will be fine?:

https://www.amazon.com/gp/aw/d/B00LW...k6L&ref=plSrch

Or components like these and I can plug only the woofers? :

https://www.amazon.com/gp/aw/d/B0037...rb_top?ie=UTF8


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[David C]

As I said, your head unit can output about 25w RMS per channel. So if you plug in a 300w RMS speaker, you'll only be able to drive it at a very low level. But if you plug in a 50w RMS speaker, then you'll be able to drive it to a much higher level, except that it won't be as powerful than driving a 300w speaker with a 300w amp. Bigger the magnet, more power needed to make it move the voice coil.


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[miiser]

Originally Posted by David C

As I said, your head unit can output about 25w RMS per channel. So if you plug in a 300w RMS speaker, you'll only be able to drive it at a very low level. But if you plug in a 50w RMS speaker, then you'll be able to drive it to a much higher level, except that it won't be as powerful than driving a 300w speaker with a 300w amp. Bigger the magnet, more power needed to make it move the voice coil.


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Ok. I don't plan to buy 300rms speakers anyways. The jvcs are about 30 rms each and the others I am planning to buy they won't be more that 50rms each.
So, about the rms I am ok as you say. I am just afraid that if I put more speakers I will blow the headunit. Because I will plug the rear speakers to the front speaker's wirings (front left to rear left front right to the rear right) so I will ask for the system to provide like 80rms per channel.
Also what about the ohms?
I know that jvcs are 4ohms. If I buy components I have to search for 4ohms too?

About the watts I don't care much about the overall power. I am not planning to make my car a club
I want a decent sound as cheap as possible.


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[miiser]

So after some searching on internet:

Option no1:
https://www.amazon.com/gp/aw/d/B00IS...yKL&ref=plSrch

Option no2:
https://www.amazon.com/gp/aw/d/B00BQ...F0L&ref=plSrch

(But these are 8ohms :/ )

Option no3:
https://www.amazon.com/gp/aw/d/B00LW...s+speakers+6.5

(Price for 1, not pair)

Option no4:
https://www.amazon.com/gp/aw/d/B0037...5ML&ref=plSrch

(Components) (maybe the best choice)

Option no5:
https://www.amazon.com/gp/aw/d/B00OY...t+speakers+6.5

(Spiciest price)

Option no6:
https://www.amazon.com/gp/aw/d/B014X...t+speakers+6.5



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[David C]

I'll check out your links later after work. To answer your questions :

You won't do any damage to the head unit if you plug in more powerful speakers, the head unit self regulate itself. However if you plug in a 10w speaker and drive it to the max of your head unit, you could damage it with high peaks of power. 30w to 50w speakers are great for running them straight from your head unit.

The ohms are the measure of your internal resistance of the speaker coil (impedance). The impedance stays the same in parallel, and defines the current based on the voltage. Stick with the same impedance for the speakers to avoid over or under driving each other.




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[miiser]

Originally Posted by David C

I'll check out your links later after work. To answer your questions :

You won't do any damage to the head unit if you plug in more powerful speakers, the head unit self regulate itself. However if you plug in a 10w speaker and drive it to the max of your head unit, you could damage it with high peaks of power. 30w to 50w speakers are great for running them straight from your head unit.

The ohms are the measure of your internal resistance of the speaker coil (impedance). The impedance stays the same in parallel, and defines the current based on the voltage. Stick with the same impedance for the speakers to avoid over or under driving each other.




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So if I understand correctly the only way to damage my headunit, is by putting really small speakers and put volume to the max? Cause u said about 10w. (U might wanted to write 100?) sorry for my miss understandings.

Have a good work and a good day. I will look forward to hear from you when you finish


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[David C]

You won't damage the head unit unless you short the wires. But you can damage low power speakers by sending them too much power. I didn't made a typo when I wrote 10w. I'm not a sound tech, thought I'm an electrician, so when it comes to electrons, I know my business.

Think of your speaker as a light. The more powerful the speaker, the higher voltage it's rated for. So a big speaker will be very bright if you send it enough power, but will appear dim with moderate power (such as the one your head unit can put out), while a medium sized speaker will appear bright, but won't light up much of a room, but it's max voltage isn't less than what your head unit can output. Then a small speaker will just burn out if you send it too much voltage (like trying to send 9v on a 6v light bulb, it will be extremely bright for a short period of time then burn out). Since the speaker have a fixed impedance, when you crank the volume knob, the current stays the same, but the voltage rises. Since power = voltage * current, voltage = current*impedance and current = square root of (power/impedance), you can use those formula to determine the power wire sizing and then to find out how much voltage the head unit can send out to your speakers only by knowing the max power output of the head unit and the speaker impedance.

Use speakers rated with minimum as much power as your head unit can output per channel and you'll be fine. Then to have the optimal effect, try to stay close to that maximum rating, otherwise you'll have to play the music with the volume all the way up all the time, which isn't good for the radio (it's like trying to drive your car on 10" tires, your engine will have to rev like crazy all the time, it'll work, but will shorten it's lifespan quickly).


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[miiser]

Originally Posted by David C

You won't damage the head unit unless you short the wires. But you can damage low power speakers by sending them too much power. I didn't made a typo when I wrote 10w. I'm not a sound tech, thought I'm an electrician, so when it comes to electrons, I know my business.

Think of your speaker as a light. The more powerful the speaker, the higher voltage it's rated for. So a big speaker will be very bright if you send it enough power, but will appear dim with moderate power (such as the one your head unit can put out), while a medium sized speaker will appear bright, but won't light up much of a room, but it's max voltage isn't less than what your head unit can output. Then a small speaker will just burn out if you send it too much voltage (like trying to send 9v on a 6v light bulb, it will be extremely bright for a short period of time then burn out). Since the speaker have a fixed impedance, when you crank the volume knob, the current stays the same, but the voltage rises. Since power = voltage * current, voltage = current*impedance and current = square root of (power/impedance), you can use those formula to determine the power wire sizing and then to find out how much voltage the head unit can send out to your speakers only by knowing the max power output of the head unit and the speaker impedance.

Use speakers rated with minimum as much power as your head unit can output per channel and you'll be fine. Then to have the optimal effect, try to stay close to that maximum rating, otherwise you'll have to play the music with the volume all the way up all the time, which isn't good for the radio (it's like trying to drive your car on 10" tires, your engine will have to rev like crazy all the time, it'll work, but will shorten it's lifespan quickly).


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Ok it makes sense. Thanks for the explanation. Nice examples.
Did you found any free time to check the links?


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[David C]

Originally Posted by miiser

Ok it makes sense. Thanks for the explanation. Nice examples.
Did you found any free time to check the links?


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I'll do in a few hours once I'm done on the jobsite.


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[miiser]

Originally Posted by David C

I'll do in a few hours once I'm done on the jobsite.


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Thank you I will wait for you.
Also, if I choose to buy the components, can I plug only the woofers, and for tweeters keep the stocks? Or it might affect the sound?


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[David C]

I've checked your links and I'd go with any of them, I think they would all be an upgraded to any stock speaker in a Yaris. However if you're considering spending up to $70 USD on a pair of speakers, I'd go with Alpine, Rockford Fostgate, Polk Audio, Clarion, etc

Be very careful about the speakers being sold single or in pair, it's often very confusing, so don't go only by the pictures, but with the title, description, reviews and questions. You can also ask Amazon Live Chat to check if they're sold single or in pair.

[miiser]

Originally Posted by David C

I've checked your links and I'd go with any of them, I think they would all be an upgraded to any stock speaker in a Yaris. However if you're considering spending up to $70 USD on a pair of speakers, I'd go with Alpine, Rockford Fostgate, Polk Audio, Clarion, etc

Be very careful about the speakers being sold single or in pair, it's often very confusing, so don't go only by the pictures, but with the title, description, reviews and questions. You can also ask Amazon Live Chat to check if they're sold single or in pair.

I did look for single or pairs and also I looked many reviews for all of them. However, the main question is: should I go for components? Or for mid bass speakers?
What suits my needs better?
Also you mentioned some brands. But you didn't mentioned kenwood. Did you had any bad experience with them?
Finally, if I buy comps and I plug only the woofers to the splitters and keep for tweeters the stocks in the pillars, will it be alright ?
And I guess all of the speakers in the link are compatible with my headunit right? Can it handle them?
Thank you for your help. I appreciate it


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[David C]

If they're 4 ohms and at least 30w RMS, they'll work. If you buy a component set, you'll just end up paying more for a set of tweeter that you won't be using (although if they're on liquidation, they might be less expensive then the speaker set only).

Look for speakers that can go as low as 50-85Hz, although even a speaker rather to 50hz won't go that low unless it's a real subwoofer.

Kenwood is good, same for JVC, Pioneer, etc, but they also make cheap stuff so beware. I find them expensive for cheap quality sometimes compared to real professional brands, that's all. I have Rockford Fostgate Punch tweeter in my car and they are kick ass. They Punch Pro series speakers are bad ass too, but they're about $70 each, so that's out of your price range.



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[miiser]

Originally Posted by David C

If they're 4 ohms and at least 30w RMS, they'll work. If you buy a component set, you'll just end up paying more for a set of tweeter that you won't be using (although if they're on liquidation, they might be less expensive then the speaker set only).

Look for speakers that can go as low as 50-85Hz, although even a speaker rather to 50hz won't go that low unless it's a real subwoofer.

Kenwood is good, same for JVC, Pioneer, etc, but they also make cheap stuff so beware. I find them expensive for cheap quality sometimes compared to real professional brands, that's all. I have Rockford Fostgate Punch tweeter in my car and they are kick ass. They Punch Pro series speakers are bad ass too, but they're about $70 each, so that's out of your price range.



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It's not a problem to buy components and have 2 extra tweeters that I don't need. Maybe someday I will replace the stock tweeters with the others from the component package. I just have to figure out how to remove the a pillar.

I want to buy the best possible, for that amount of money. If components are better then I will go for them. If not I will buy mid bass speakers.

Hmmm it needs so much search to find the best buck for the money

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