Amp for 6 Speaker System

[ipedal]

I have the tweeter option on my '03 and was wondering if a 4-channel amp would work. I was just going to use the orig head unit until I cipher out what aftermarket head unit to use. I looked at the "How to add aftermarket amp" in the Mod shop but couldn't see where the tweeters were fed.
thanks,
bill g

[nhparrot]

I have the tweeter option on my '03 and was wondering if a 4-channel amp would work. I was just going to use the orig head unit until I cipher out what aftermarket head unit to use. I looked at the "How to add aftermarket amp" in the Mod shop but couldn't see where the tweeters were fed.
thanks,
bill g

In the stock system the front left & right channels each feed a woofer and the tweeter.

[ipedal]

In the stock system the front left & right channels each feed a woofer and the tweeter.

Glenn,
Thanks for reply.
So if I had an aftermarket amp w/speaker level inputs am I gonna hook it before or after the oem amp?
I guess if I looked at your HowTo this would be a little more clear. I was gonna order an amp and hated to get the dash apart and then have to start posting to TS for discretions.
bill g

[nhparrot]

Glenn,
Thanks for reply.
So if I had an aftermarket amp w/speaker level inputs am I gonna hook it before or after the oem amp?
I guess if I looked at your HowTo this would be a little more clear. I was gonna order an amp and hated to get the dash apart and then have to start posting to TS for discretions.
bill g

After the OEM amp. In the Toyota, the vehicle harness plugs into the amp, the amp has a pigtail that connects to the radio/hu. I am not aware of any amp bypass harnesses available.

[GP]

I would avoid the stock amp if possible - I am not aware any harness either so go to WWW.Carsound.Com and post this on the general Audio forum and see if anyone can help with your install. If you leave the sock amp in the loop you may get alot of unwanted noise in your system.

[mgp]

I would avoid the stock amp if possible - I am not aware any harness either so go to WWW.Carsound.Com and post this on the general Audio forum and see if anyone can help with your install. If you leave the sock amp in the loop you may get alot of unwanted noise in your system.

I just did an install using the speaker level outputs from the stock amp feeding a David Navone LOC for the 4 channel amp and speaker level direct to the sub amp and there is absolutely no noise. In fact I find the sound comparable to the all Alpine system in my previous car.

[GP]

I just did an install using the speaker level outputs from the stock amp feeding a David Navone LOC for the 4 channel amp and speaker level direct to the sub amp and there is absolutely no noise. In fact I find the sound comparable to the all Alpine system in my previous car.

By all means go with the voice of experience. And use the same LOC as he did. They are by far the best sounding and most noise free. Again, they are availible at www.carsound.com.

[ipedal]

gp, mgp,
Thanks for reply.
So even if the amp has speaker level inputs I need an LOC?
BTW, I looked at carsound.com and didn't see any retail links except Zeb.
bill g

[GP]

gp, mgp,
Thanks for reply.
So even if the amp has speaker level inputs I need an LOC?
BTW, I looked at carsound.com and didn't see any retail links except Zeb.
bill g

Sorry about the mixup - here is direct way http://www.davidnavone.com/ I thought it was on there web page. Go to carsound' s forum - Its the best car stereo Forum around. Post a question or two and you will get a responce from people who know car audio! Of course like all Forums you might have to weed out a few but on this forum very few.

The key to David Navone's LOC is it is super clean and has upto 8 volts of output. Must LOC's are made with about $1 worth of trash resisters and have limited frequency responce. Goto the www.carsound.com Forum and post this same question. Navone, Richard Clark and some of the most respected car audio experts really answers the questions.

[mgp]

gp, mgp,
Thanks for reply.
So even if the amp has speaker level inputs I need an LOC?
BTW, I looked at carsound.com and didn't see any retail links except Zeb.
bill g

No, if your amp accepts speaker level inputs you won't need a line out converter.

[GP]

No, if your amp accepts speaker level inputs you won't need a line out converter.

You are right - you do not "need" an LOC if the amp has speaker level inputs - but sound quality will be better with the Navone LOC.

I also found this toyota amplifier adapter - http://www.scosche.com/scosche/connectors/TA03.asp - I never used it so you may want to contact scoche and make sure it will help.

[ipedal]

You are right - you do not "need" an LOC if the amp has speaker level inputs - but sound quality will be better with the Navone LOC.

I also found this toyota amplifier adapter - http://www.scosche.com/scosche/connectors/TA03.asp - I never used it so you may want to contact scoche and make sure it will help.

gp,
Ok, I'll look into the Navone. Thanks too for the adapter link.
bill g

[mgp]

You are right - you do not "need" an LOC if the amp has speaker level inputs - but sound quality will be better with the Navone LOC.

I also found this toyota amplifier adapter - http://www.scosche.com/scosche/connectors/TA03.asp - I never used it so you may want to contact scoche and make sure it will help.

Hard to say if sound quality will be better or worse using your amps speaker level inputs, depends if the signals are transformer isolated or not(David Navones LOC's are.).

As far as Scoshe adapters go, if you want to break out the speaker level output then you need the Ta02 and Ta02r which you will wire back to back. Details are in the Garage.

[mgp]

You are right - you do not "need" an LOC if the amp has speaker level inputs - but sound quality will be better with the Navone LOC.

I also found this toyota amplifier adapter - http://www.scosche.com/scosche/connectors/TA03.asp - I never used it so you may want to contact scoche and make sure it will help.

Hard to say if sound quality will be better or worse using your amps speaker level inputs, depends if the signals are transformer isolated or not(David Navones LOC's are).
One advantage of using speaker level inputs is that usually the amp will have a sensing circuit that will power the amp up when it see's an input signal thus avoiding having to run an amp trigger.

As far as Scoshe adapters go, if you want to break out the speaker level output then you need the TA02 and TA02R.
I ordered mine from a car stereo shop in Florida(www.stereoinstallparts.com)

The details are in the Mod Shop in the Garage section of Tundra Solutions. The link is "How to Keep the Toyota Factory Stereo and Add a New Aftermarket Amplifier- The Basics of the Line-Level Converter."

[GP]

Hard to say if sound quality will be better or worse using your amps speaker level inputs, depends if the signals are transformer isolated or not(David Navones LOC's are).
One advantage of using speaker level inputs is that usually the amp will have a sensing circuit that will power the amp up when it see's an input signal thus avoiding having to run an amp trigger.

As far as Scoshe adapters go, if you want to break out the speaker level output then you need the TA02 and TA02R.
I ordered mine from a car stereo shop in Florida(www.stereoinstallparts.com)

The details are in the Mod Shop in the Garage section of Tundra Solutions. The link is "How to Keep the Toyota Factory Stereo and Add a New Aftermarket Amplifier- The Basics of the Line-Level Converter."

Transformer Isolation is just part of the equation - this helps keep noise out of the system (alternator wine). Keeping source impedence high and the noise floor low is the key to a good LOC. If you crack open an amp w/ a speaker level inputs you will see a few resistors in line to drop the voltage then that is connected to the gain pot. A seperate LOC will also give him system flexability down the road.

Also I am a little confused about the TA02 and TA02R - aren't those used when connceting after market equipment to the haed unit? I thought he was to connect the amp after the stock amp not the head unit?