Factory amp questions.

[StrikerFury]

'00-'02 Premium sound:
So, you have several choices.

Bypass amp to the tweeters/mids and lose some bass.
Bypass amp to the tweeters/mids and add a small sub amp to drive the front bass/subwoofers.
Change the wiring from the mid speakers to the bass/sub speakers and lose some mid-range.
Add an aftermarket 3way crossover to the front speakers.
Replace the front component speakers with a wider range 2way component set.

*NOTE: The OEM single rear speakers & the front woofers are rated 25W and the front component mid/tweets are rated 17.5W
2way

Sorry I'm noobie about some of these audio things.

That being said I have a 00 GT-S with the premium sound system. And I have the factory deck and the factory amp. I was wondering if it was worth doing the factory amp noise mod or should I just bypass the factory amp? I have a Pioneer P6000ub which has Amp max output power 50 watts x 4. I had this installed in my GT for awhile and I thought it sounded just fine.

But from my noobie understanding if you hook up a HU to a Toyota harness it will be super loud/hissing noise because it has too much power running to the speakers. I know on my deck it only has Front L & R Rear L & R Sub L & R. And I know with the factory speakers and bypassing the factory amp I have to combine two of the speakers because there isn't enough outputs on the deck. So I wouldn't mind buying 2 way speakers for the front speakers.

So am I better off bypassing the amp and using my HU's amp?
Or can I bypass the factory amp to the mids/tweets/subs? Does bypassing one of these give less hiss?
Planning on installing a sub (Infinity Bass link) I would just hook it up to my HU just fine correct?
Or do most HU don't really sound that nice compared to someone who did the factory amp noise mod?
If I did do the noise factory amp mod would be the volumes between each number be a huge difference? Say from volume 2 to volume 3 would be a huge jump in volume?
How would I bypass the factory amp? Do i just connect the HU to the harness on the factory amp or something? I don't really understand what grounding does.
Are the stock speakers pretty weak? Should I upgrade the front ones?
Sorry for all the question in not particular order but this is somewhat confusing to me.:puke:

[02celica]

Bypass the amp. just buy the kit that scosche (Sp?) sells for bypassing the factory amp. And yes the stock speakers are ****.

[StrikerFury]

Bypass the amp. just buy the kit that scosche (Sp?) sells for bypassing the factory amp. And yes the stock speakers are ****.

Wait are you talking about the Scosche TA-03? Doesn't that have the hiss still?

Or do I need to get the Scosche TA-03 and if I do then I need to get 2 way front speakers?

[2way]

because it has too much power running to the speakers.No, that isn't the issue. The issue is running low level, higher impedence, HU output to the factory amp.I have to combine two of the speakers because there isn't enough outputs on the deck.If you are planning on using the factory amp w/o an external sub amp... you're fine.So am I better off bypassing the amp and using my HU's amp? Power wise, yes.Does bypassing one of these give less hiss?Yes. As I said, the hiss/noise is when you use the factory amp.Are the stock speakers pretty weak?Yes. If you bypass the stock amp, your HU's oputput is too high for the stock speakers.Should I upgrade the front ones?If you bypass, you'll need to upgrade all of them.Wait are you talking about the Scosche TA-03?No. He's talking about the Scosche Amp Bypass harness.

[StrikerFury]

Okay so it seems like what I want to do is buy the Scosche Amp Bypass harness, then replace all the speakers in my car. But does that include the tweeters as well?

Is it the Scosche Ta03B Amplifier Harness For 2000 and Up Toyota I want to buy?

[2way]

But does that include the tweeters as well?Ah yup.

The TA-03B or the cheaper Metra 70-8113/Best Kits BHA8113 will get you power etc. for the radio.

You may have trouble finding the amp bypass harness. It used to be Metra 70-8118.
But, if you're replacing speakers, you can just run new wiring instead.

[StrikerFury]

Ah yup.

The TA-03B or the cheaper Metra 70-8113/Best Kits BHA8113 will get you power etc. for the radio.

You may have trouble finding the amp bypass harness. It used to be Metra 70-8118.
But, if you're replacing speakers, you can just run new wiring instead.

So if I got the Metra 70-8113/Best kits/TA-03B harness all I would use is the power and etc. But not like the speaker wires? Would I splice from the amp harness to connect to deck to get my speakers to work without the factory amp?

This is the one you're talking about right?
http://www.sonicelectronix.com/item_12710_Metra+70-8118.html
With this one I would just hook everything right up since it's the factory amp bypass?

And if I have to replace the tweeters as well how would I go about doing that? Since they go through a hi-pass filter? Do i need to buy a 3 way then?

Sorry very noobie :marky:

[2way]

This is the one you're talking about right?
http://www.sonicelectronix.com/item_...a+70-8118.html
With this one I would just hook everything right up since it's the factory amp bypass?Interesting..... I've never used it. But, it appears that with the bypass harness you may not need the 70-8113/BHA8113/TA-03. The one problem you'll have is the '00-'02 front subwoofer problem.

So if I got the Metra 70-8113/Best kits/TA-03B harness all I would use is the power and etc. But not like the speaker wires? If you use this and not the bypass harness..... yes.

Would I splice from the amp harness to connect to deck to get my speakers to work without the factory amp?Yes. Disconnecting the harness from the amp and splicing to the HU or just running new wiring directly to the replacement speakers.

And if I have to replace the tweeters as well how would I go about doing that? Since they go through a hi-pass filter? Do i need to buy a 3 way then?Most folks buy a component set for the front that includes the crossover. Any other coaxial speaker you're likely to buy will have its own tweeter. So, you wouldn't want to run two of them. If memory serves me, the OEM High pass is just a bass blocking capacitor that is located with the tweeter. So, if you remove the tweeter, the cap goes with it.

[StrikerFury]

I'm very sorry 2way making you answer all these dumb questions...

But you said I would run into the 00-02 front woofer problem? What do you mean?

I don't think I'm on the same page sorry... Sure this is explained somewhere for idiots like me.

So what it sounds like is what I'm going to need to buy is a "component speaker system". Does a component speaker systems consist of separate woofers, tweeters, and crossovers?
For example these Rockford Fosgates?
http://www.crutchfield.com/p_575R1652S/Rockford-Fosgate-Prime-R1652-S.html?tp=106

And for the rear speakers I can sorta run any sort of speaker that will hook up to the wire wires running to the back?
Say theses?
http://www.crutchfield.com/p_575R1653/Rockford-Fosgate-Prime-R1653.html?showAll=N&tp=105
If you know any great sounding speakers for cheap I'm open for suggestions.

Right now this is what I have pictured in my head.

I'm going to hook up my HU to the amp bypass harness, then hook up the front component speaker system and the rear 3-way speakers to the factory amp bypass harness. Then I'm going to connect my sub to my HU. Hopefully this is the correct way to do this?

[2way]

But you said I would run into the 00-02 front woofer problem? Sticky: Choices for Bypassing the OEM Premium Sound Amplifier (http://www.newcelica.org/forums/showthread.php?t=297542)
Does a component speaker systems consist of separate Yes
Hopefully this is the correct way to do this? Sounds right.

[blkcelica01]

And yes the stock speakers are ****.

the rears actually aren't all that bad

[2way]

the rears actually aren't all that bad On the '03+, yes.... the '00-'02 is just a single wide range... not even a coaxial. :thumbdown:

[lamboceliGTS]

Yea, I had all the same questions as the op.

It's really easy to bypass the amp just get the wiring harness. Also the alt whine isnt too bad.

[broderp]

the rears actually aren't all that bad

Agreed. I'm running the stock OEM JBL setup with a new head unit and couldn't be happier.



It's really easy to bypass the amp just get the wiring harness. Also the alt whine isnt too bad.

EVERYONE says this. I must be loucky, becuase I've NEVER had alternator whine when installing an aftermarket HU with OEM amps and speakers, when gutting and using new components.

[2way]

Agreed.
On the '03+, yes
You've got the '03+ coaxials. :eslap: