[Robert Taylor]

I thought I would post this link because I would think that most 5th gen Prelude owners probably don't know that they own a type of active wolfer system . Here are some points to think about as you read the link .

1: The rear speakers are 2 ohms rather then the usual 8 ohm type . The lower speaker resistance results in a big increase in current . Because current is a squared term in the equation P = I squared R this result in a big output of power .

2: The rear speakers are mono but that no big deal because when your amplify low frequency sounds you can't really detect the stereo effect any way .

3: The rear speaker system uses a type of automatic gain control that monitors the speaker output with a mike and and uses that signal information to actively control how much the amp in the trunk is driven so it can be driven closer to it max point a higher % of the time compared to a normal amp . This results in a higher average power for the amp .

You could say in a way you have a VTEC sound system .

http://personal.bellsouth.net/v/i/vi...dio.html#stock

[psud3ity]

Oh I have to reply to this one.... Let me just get this out of the way.

Originally Posted by Robert Taylor

I thought I would post this link because I would think that most 5th gen Prelude owners probably don't know that they own a type of active sub wolfer system . Here are some points to think about as you read the link .

I seriously doubt that gay little box that impedes my actual subwoofers from fitting has ANYTHING but passive crossover components and a puny little amp in it. I'm calling crap there.

Originally Posted by Robert Taylor

1: The rear speakers are 2 ohms rather then the usual 8 ohm type . The lower speaker resistance results in a big increase in current . Because current is a squared term in the equation P = I squared R this result in a big output of power .

Impedance has nothing to do with whether a woofer is in fact a woofer. The frequency the speaker is designed to play does. Most car audio speakers are 4 ohm, as your link suggests. Home audio speakers usually tend to have higher impedances such as 8 ohm... but alot of tweeters also have 8 ohm voice coils... Mine have 4 ohm coils, and I've seen 6 ohm voice coils before as well. All this has to do with is the number of windings in the voice coil... Nothing more. There is nothing special regarding impedance whatsoever. The rear speakers could be categorized as woofers, however, they are not subwoofers. Subwoofers are designed to play frequencies below 150Hz. Go play a test tone sweep from 20Hz to 150Hz, bet you don't hear a peep out of your rear speakers.

Originally Posted by Robert Taylor

2: The rear speakers are mono but that no big deal because when your amplify low frequency sounds you can't really detect the stereo effect any way .

True. Most subwoofers are mono...

Originally Posted by Robert Taylor

3: The rear speaker system uses a type of automatic gain control that monitors the speaker output with a mike and and uses that signal information to actively control how much the amp in the trunk is driven so it can be driven closer to it max point a higher % of the time compared to a normal amp . This results in a higher average power for the amp .

That would be to prevent the vehicle from showing rear stage... which is a big big no no. Basically the way I understand the acoustic feedback system is that microphone varies the rear stage to "fill" and not overwhelm... I could take mine apart as I don't use it and see what type of wizardry is involved in that box. Now thinking that a stock system will actually run itself to peak power sounds like backwards from OEM to me... Look at newer VWs (my buddy's GTI for example). If you turn the volume up "too high", it will actually turn it down for you... which is possibly the stupidest thing I've ever seen. Rear speakers are completley overrated anyway.

Originally Posted by Robert Taylor

You could say in a way you have a VTEC sound system .

http://personal.bellsouth.net/v/i/vi...dio.html#stock

I'm not even going to start on that statement. I actually got a headache when I read that.

[2nd one]

i know what you mean about the vw too. that monsoon system sucks. the amp is in good location for a bypass though. and the factory amp is crossed over internally for the rears to play midrange sounds. isn't there a rear sub in the middle of the rear seat though? i could be thinking of a different car too.

[Robert Taylor]

Originally Posted by psud3ity

Oh I have to reply to this one.... Let me just get this out of the way.







I seriously doubt that gay little box that impedes my actual subwoofers from fitting has ANYTHING but passive crossover components and a puny little amp in it. I'm calling crap there.



Impedance has nothing to do with whether a woofer is in fact a woofer. The frequency the speaker is designed to play does. Most car audio speakers are 4 ohm, as your link suggests. Home audio speakers usually tend to have higher impedances such as 8 ohm... but alot of tweeters also have 8 ohm voice coils... Mine have 4 ohm coils, and I've seen 6 ohm voice coils before as well. All this has to do with is the number of windings in the voice coil... Nothing more. There is nothing special regarding impedance whatsoever. The rear speakers could be categorized as woofers, however, they are not subwoofers. Sub woofers are designed to play frequencies below 150Hz. Go play a test tone sweep from 20Hz to 150Hz, bet you don't hear a peep out of your rear speakers.



True. Most subwoofers are mono...



That would be to prevent the vehicle from showing rear stage... which is a big big no no. Basically the way I understand the acoustic feedback system is that microphone varies the rear stage to "fill" and not overwhelm... I could take mine apart as I don't use it and see what type of wizardry is involved in that box. Now thinking that a stock system will actually run itself to peak power sounds like backwards from OEM to me... Look at newer VWs (my buddy's GTI for example). If you turn the volume up "too high", it will actually turn it down for you... which is possibly the stupidest thing I've ever seen. Rear speakers are completley overrated anyway.



I'm not even going to start on that statement. I actually got a headache when I read that.

1 Your right : Sub-wolfer was a incorrect description and wolfer is more correct . It is a low frequency amplifying system though . My mistake .

2 Transistors are current amplifying devices and tubes are voltage amplifying devices . Transistors like to load into lower output impedances and are able to deliver more power with that type of load .

3 AGC circuits have been used in radio receivers for years . A small amp with a AGC circuit enables a small amp to deliver an average power equal to that of a larger amp but it does nothing to improve the peak output . It also gives one with a smaller amp the same ability to amplify weak sounds as much as a larger amp that does not have AGC control and prevents clipping of the stronger signals buy reducing the gain of one of the amps prior to the finials when needed . In another way of speaking its a amp thats always being pushed to the limit and in that way it gives a sense of loudness that one would experience with a higher powered amp that was just loafing along . Just as the VTEC system changes the engines characteristics , AGC changes the characteristics of the amplifier to give max output despite varying input signals consistent with no clipping type distortion .

This system can't work a miracle and deliver sound like a sound system you showed above but it does offer some advantages of a system having a much higher audio output .

[Robert Taylor]

I just noticed that this amp in the trunk is being powered with a very small #18 wire . Maybe installing a capacitor across its power supply line input at the amp may make a bit of a difference .

[2nd one]

i don't think it would make a noticeable difference, and also wouldn't recommend it because factory systems are sensitive to voltage changes. does the 4 or 5g lude have the center sub in the middle of the back seat? thats buggin me now. it mighta been a supra i was working on. just not sure. . .

[zsudz922]

Originally Posted by psud3ity

Oh I have to reply to this one.... Let me just get this out of the way.

wolfer

[psud3ity]

Originally Posted by Robert Taylor

1 Your right : Sub-wolfer was a incorrect description and wolfer is more correct . It is a low frequency amplifying system though . My mistake .

2 Transistors are current amplifying devices and tubes are voltage amplifying devices . Transistors like to load into lower output impedances and are able to deliver more power with that type of load .

True, it makes the amplifiers life harder though... Honda apparently decided to make a decent 14w or less RMS amplifier.

Originally Posted by Robert Taylor

3 AGC circuits have been used in radio receivers for years . A small amp with a AGC circuit enables a small amp to deliver an average power equal to that of a larger amp but it does nothing to improve the peak output . It also gives one with a smaller amp the same ability to amplify weak sounds as much as a larger amp that does not have AGC control and prevents clipping of the stronger signals buy reducing the gain of one of the amps prior to the finials when needed . In another way of speaking its a amp thats always being pushed to the limit and in that way it gives a sense of loudness that one would experience with a higher powered amp that was just loafing along . Just as the VTEC system changes the engines characteristics , AGC changes the characteristics of the amplifier to give max output despite varying input signals consistent with no clipping type distortion .

Still can't find the high-cam lobes on the amplifier. Will continue looking.

Originally Posted by Robert Taylor

This system can't work a miracle and deliver sound like a sound system you showed above but it does offer some advantages of a system having a much higher audio output .

Damn right it can't. Would be like my system if I put a trained monkey in my trunk and taught him to fuck with the gain while I drive.

Originally Posted by 2nd one

i know what you mean about the vw too. that monsoon system sucks. the amp is in good location for a bypass though. and the factory amp is crossed over internally for the rears to play midrange sounds. isn't there a rear sub in the middle of the rear seat though? i could be thinking of a different car too.

I think you're looking at the third brake light there.

Originally Posted by Robert Taylor

I just noticed that this amp in the trunk is being powered with a very small #18 wire . Maybe installing a capacitor across its power supply line input at the amp may make a bit of a difference .

Capacitors are bullshit, Capacitors are bullshit, Capacitors are bullshit.
http://www.diymobileaudio.com/forum/773793-post9.html

True for aftermarket systems and stock systems.

Originally Posted by 2nd one

i don't think it would make a noticeable difference, and also wouldn't recommend it because factory systems are sensitive to voltage changes. does the 4 or 5g lude have the center sub in the middle of the back seat? thats buggin me now. it mighta been a supra i was working on. just not sure. . .

Nope. Third brake light if it's a base nothing if it's an SH.

[2nd one]

no not a third brake light a factory mounted sub in the center of the rear seat. not on the rear dash. think i can tell the difference. . .

[psud3ity]

Originally Posted by 2nd one

no not a third brake light a factory mounted sub in the center of the rear seat. not on the rear dash. think i can tell the difference. . .

Hrm.. yeah don't think thats a 5th gen thing... at least not one I've ever seen.

[nordicBBsex]

I saw a sub in the middle of a 5th gen's rear seat once but it was stupid looking and he did it himself

[psud3ity]

[nordicBBsex]

^ so do wolfers hahaha

[toast]

Originally Posted by 2nd one

no not a third brake light a factory mounted sub in the center of the rear seat. not on the rear dash. think i can tell the difference. . .

Yeah, there's a sub in the 4th gennies. Optional equipment though.

[Phantom Lude]

Rolflmao wolfer

[toast]

Originally Posted by Phantom Lude

Rolflmao wolfer

i wanted to bust op's balls, but it has already been done so much, in this, and many other threads. it would have the satisfaction of getting kicked in the nuts for me... meh

[mercutio]

jdm 4g's with the gathers stereo system had an optional centre rear speaker inbetween the rear seats i have one in mine. Also i have seen a rear centre speaker for the 5g its in the third brake light housing.

[2nd one]

i knew i worked on one. thanks fellas

[4thGenPrelude]

What the hell is a wolfer? And a subwolfer?

And Psud3ity, he's referring to the rear center subwoofer in the 4th gen (internally amplified 6x9?). There is a sort of "active" system using a mic to adjust. Though active still doesn't sound like the right word.

And VTEC really?

[psud3ity]

Originally Posted by 4thGenPrelude

What the hell is a wolfer? And a subwolfer?

And Psud3ity, he's referring to the rear center subwoofer in the 4th gen (internally amplified 6x9?). There is a sort of "active" system using a mic to adjust. Though active still doesn't sound like the right word.

And VTEC really?

http://sound.westhost.com/biamp-vs-passive.htm

I seriously doubt it's active. has nothing to do with the presence of a microphone.

[4thGenPrelude]

I know what active is and I know its not active. That is the manner in which Honda refers to it in their advertisements. It's not an "active" crossover system. It is an active, microphone based, fill-control system.

[RattyMcClelland]

Originally Posted by 4thGenPrelude

I know what active is and I know its not active. That is the manner in which Honda refers to it in their advertisements. It's not an "active" crossover system. It is an active, microphone based, fill-control system.

The 4th gen has no such system. Its just an amplified subwoofer and since the sub has its own amplifier it is crossover active as the OEM JDM DSP headunit only sends low frequency signals to the amp. If it was passive there would be a crossover between the amp and the speaker.

The 5th Gens sound system runs off a 2x20wrms fronts and 2x40wrms rears wired in 2 ohms mono. Completely passive system as the stock 6x9s have small poly capacitors on them (basic crossover) to low pass the frequency.

What is this centre speaker on 5th Gens you are on about? I though no such option existed on the 5th Gen. Only the 4th Gens.

[cudaboy]

omgod!!! I don't even know where to begin?

wolfer?? Really?? Even after you said it the first time and was called out on it you use it again?!?! I like wolf's and all, hell they can hear from a mile away and can and do track up to 7 miles in any direction often. Makes me wonder while we are on the subject of "wolfers" how do you spell bass?? Or is it "base" for you?! 8 ohm standard on a car?!?! I realize i have been doing my own thing and don't work on newer cars than say '91 vintage but when in the hell did car makers revert to using lame duck 8 ohm speakers as house speakers? Sure as hell hadn't caught on in the aftermarket world! Gee wonder why?? You have kind of a cool avatar. It is a roadrunner and that was a make of a car for plymouth and source of advertising in the late '60's and early '70's. I would think with that avatar that you might know something about something and been around the block atleast once. After all my name is cudaboy and i bought an extremely rare 1970 'cuda that had baracuda options on fender tag and build sheet. In the summer of my junior year back in 1990. But frankly i have come to the conclusion that you are an imposter and not from the native third rock from the sun. You have been warned i am in the process as we speak of contacting the men in black resulting you to have failed in all attempts to fit in and are nothing more than a pile of gooo!! For everybody else reading this post please look at this shiny ceptor. You will feel right in the world and remember none of this in another second.

[Robert Taylor]

Originally Posted by cudaboy

omgod!!! I don't even know where to begin?

wolfer?? Really?? Even after you said it the first time and was called out on it you use it again?!?! I like wolf's and all, hell they can hear from a mile away and can and do track up to 7 miles in any direction often. Makes me wonder while we are on the subject of "wolfers" how do you spell bass?? Or is it "base" for you?! 8 ohm standard on a car?!?! I realize i have been doing my own thing and don't work on newer cars than say '91 vintage but when in the hell did car makers revert to using lame duck 8 ohm speakers as house speakers? Sure as hell hadn't caught on in the aftermarket world! Gee wonder why?? You have kind of a cool avatar. It is a roadrunner and that was a make of a car for plymouth and source of advertising in the late '60's and early '70's. I would think with that avatar that you might know something about something and been around the block atleast once. After all my name is cudaboy and i bought an extremely rare 1970 'cuda that had baracuda options on fender tag and build sheet. In the summer of my junior year back in 1990. But frankly i have come to the conclusion that you are an imposter and not from the native third rock from the sun. You have been warned i am in the process as we speak of contacting the men in black resulting you to have failed in all attempts to fit in and are nothing more than a pile of gooo!! For everybody else reading this post please look at this shiny ceptor. You will feel right in the world and remember none of this in another second.

Remember boys and girls : Friends don't let friends surf the INTERNET while mentally deranged . When a person starts referring to people being from outer space , I guess some people from the institution , after hearing such talk , come into the room and give him his daily shot to calm him down . lol

Note : I am not a car stereo guru which is why I provided a link to someone much more knowledgeable then I on the original post on this thread . I have learned a few things from what people have posted on this thread which is good for me and anyone else reading this thread and thats what its all about on a site like this in my opinion .

[mackie]

Originally Posted by Robert Taylor

Remember boys and girls : Friends don't let friends surf the INTERNET while mentally deranged . When a person starts referring to people being from outer space , I guess some people from the institution , after hearing such talk , come into the room and give him his daily shot to calm him down . lol

Note : I am not a car stereo guru which is why I provided a link to someone much more knowledgeable then I on the original post on this thread . I have learned a few things from what people have posted on this thread which is good for me and anyone else reading this thread and thats what its all about on a site like this in my opinion .

agreed