Randal Johnson

Looks Awesome Bro ... I get to hear these in June !!!!

Thank you Tirefryr ... My point exactly ... My whole reasoning for saying this ...

Here is another one we can ponder through ... Terms to Know about Car Audio: Aspects of Sound Quality Listening to audiophiles go on about the sound quality of their audio systems — from their woofers to their tweeters — can sound a lot like oenophiles going on and on about the qualities of wine. To understand such talk, start by understanding the four basics of sound quality: Clarity Dynamic range Frequency response Tonal balance Clarity Clarity is the ability of a system to produce the original signal as intended, without distortion. Distortion can be caused by numerous things — from a head unit that's not level-matched with an amplifier to an amplifier that's clipping, or being overdriven and sending a distorted signal to the speakers. And distortion can come from any component in a system. A good test is to listen to cymbals, which can have a brassy and off-putting sound when distorted. High-pitched female vocals are also difficult to reproduce and can reveal distortion rather easily. Achieving clarity and therefore avoiding distortion is all about proper system design and tuning. It's making sure components are of sufficient quality and compatible with one another and that signal levels are well matched between electronics. It also involves using a component as it was intended and not pushing it past its design limits. Dynamic range Dynamic range refers to the ability of a system to reproduce loud and soft passages in music with the same level of detail. When you're at a live concert, a singer may wail and then whisper or a drummer may hit a drum head with brute force and then back off a bit. Each extreme is an important part of the performance. If the performance is recorded and reproduced by an audio system, the loud and soft parts should be delivered with the same detail and accuracy. But often a system tends to suppress soft parts and emphasize loud ones, meaning you lose the subtleties of the performance. A related concept is linearity, which refers to a system's tendency to lose detail when the volume is turned down. A system has great linearity if it can retain the same detail at a low volume that it does when it's cranked up. Frequency response Every sound you hear, from the low rumble of thunder to the high-pitch wail of a siren, is caused by vibrations in the air that occur at certain frequencies. These vibrations are measured in hertz (Hz), which refers to the number of times per second these vibrations occur. Humans can hear frequencies roughly from 20 to 20,000 Hz. A car audio system's frequency response represents how much of the audible frequency spectrum it can reproduce. The frequency response of a car audio system can be measured by an instrument known as a real-time analyzer (RTA), which consists of a microphone attached to a processor with a display that has a graph that shows a system's response. Tonal balance An ideal car audio system uniformly reproduces the entire audible frequency spectrum from 20 to 20,000 Hz. But no system — at least while playing music — is perfect. Music is dynamic; some parts are loud and some are soft, so a system will naturally have dips and peaks in its frequency response. Although a system can have these peaks and dips in frequency response, it needs to have good tonal balance — a relatively equal amount of sonic energy across the frequency range — to sound good. Subsequently, system designers and tuners often measure frequency response to gauge which frequencies may need to be boosted or cut as opposed to trying to achieve a flat frequency response. This can be done with an equalizer, although it's best that the system is designed in such a way that it has good tonal balance to begin with. Read more: http://www.dummies.com/how-to/content/terms-to-know-about-car-audio-aspects-of-sound-qua.html#ixzz1IGxrzAQ8

It's dependent upon the judges(s). I will agree to that ... But what if it is like somebody like ///M5 that has a million dollars worth of test equipment for personal use. Is it still judges dependent ?? Based on the answer you just gave me, I'm learning and asking questions, not subjective ... I'm Very interested on this one guys ... thanks, Randal ...

Welcome to SSA !!!

This is where it can get interesting. No rattling th mirrors, vibrating panels, or blowing up some underaged chicks hair ... This is absolute reproduction of music as it was ment to sound when it was recorded ... Now I'm very interesred !!! Please continue ...

What's that got to do with the very first post in this thread ... That book or site you got that from ... Does it say anything about SPL ???

That definition is how SQ is judged not actually what SQ means. Sir, Can you please explain to me the true definition of Sound Quality ?? This is What I come up with ... Advanced Car Audio Sound Quality Concepts Although the four basic sound quality concepts (clarity, dynamic range, frequency response, and tonal balance) are the most fundamental to understand before purchasing a new car audio system, there are a few other sound quality attributes that are also important. Timbre Timbre (pronounced "TAM-bir") refers to a system's ability to recreate the sound of an instrument as it was originally intended to be heard. An acoustic guitar is usually a good test for this because most people have heard one. Does the sound have that warm, slightly resonant quality that the instrument is known for, or does it merely sound like a low-resolution reproduction of that signature sound? Tonal accuracy Tonal accuracy describes how faithful a system is in general to the original recording. It can apply to instruments as well as vocals. The more accurate the system is while playing a good recording, the more you feel as if you are there, listening to a live performance as opposed to a recording. Tonal accuracy can also apply to the ambiance in a recording, which refers to the space in which a recording is made. Most modern recordings are made in a sort of vacuum, with individual instruments recorded separately or, in the case of some rap music, the individual parts are sampled from other recordings. But many older recordings, some modern ones, and almost all live albums capture the environment in which the performance was recorded. In fact, certain recording studios and performance spaces are known and revered for their sound, which give a recording or performance a specific ambiance. Think of timbre and tonal accuracy as the reproduction of how close you get to the actual performance or how the producer intended for it to sound. Whether it's the sound of Miles Davis's trumpet, Jimmy Page's guitar, a Dr. Dre beat, or the ambiance of Carnegie Hall, how well a system can reproduce it the way it went down in a studio or concert hall determines the difference between a good system and a great one. Staging and imaging Staging and imaging are related concepts that go back to the heyday of stereo, and therefore don't always apply to modern music. The basic idea is that when you're listening to a stereo recording, the system should recreate the illusion of the stage on which the performance occurred, and you should be able to pinpoint the sonic image of the individual performers and instruments within the stage. Think about the example of a basic rock band that includes a singer, guitarist, bass player, and drummer. You should be able to close your eyes and picture the singer at the center of the stage, the guitarist to the right, the bass player on the left, and the drummer center and behind the singer. Keep in mind that this is an ideal that sound quality systems should approach if not achieve. With rap and many pop-music recordings, the vocalist will be centered, but the concept of a band playing on a stage doesn't exactly apply. Speaker placement has a dramatic effect on staging and imaging, and hardcore enthusiasts often go to great lengths to position their speakers for the best possible results. This includes rebuilding door panels to better position speakers. Some have even built elaborate mechanisms to mount speakers in or raise them above the dash in order to achieve better staging and imaging. Finally, no discussion of sound quality would be complete without mentioning interior acoustics. A car's interior, its reflective surfaces (such as glass), and its absorptive materials (upholstery) play a dramatic role in a system's response. And every car interior is different; if you install the exact same components in your Toyota Camry that your friend has in his Chrysler 300C, the systems will sound very different.

That definition is how SQ is judged not actually what SQ means. Sir, Can you please explain to me the true definition of Sound Quality ??

Bassahaulic and his girl friend has hit that 150 db mark bro ...

who was you referring to sir ??

like I said Bro ... 45 watts RMS ... Not shure about the Term Lab bro ... I quit competing in 97 ... and was still useing Audio control and B&K ...

Yes, i had a high voltage amp ... just like the one I have today ... truck was a 1987 Mazda b2000 with a quarter cab blowthru ... yes, alot of modifications ...

I remember stating correct installation skills bro ...

It was back in the day called a "cheater amp" actually pushing ALOT more than rated ... If you go back a few years ... Cheater Amps were the reasoning for all those power classification changes in the mid 90s ... Amps like US Amps, Punch (rockford Fosgate), Linear Power, PPI, and especially Orion HCCA Amps ...

It was back in the day called a "cheater amp" actually pushing ALOT more than rated ...

alot of that had to do with system installation also ... There were alot of factors there ... if you all say its bullshit, I really don't care ... Drew, you heard the truck I have now. and you seen my 50 watt rms amp too. you still think its not possible ??

On the Audio Control? lol B&K Bro ... legal, in the record books ... I am forced to call BS on that. 45 watts rms and a sealed box does 50's? How do I do that? Class A/b amp bro ... how old were you in 1992 ?? In 92 I was 0 for most the year. I just want the secret for a 50 with 45w and a sealed box. When these days it takes 2 beefy ass 12"s, a ported box, and 3k to reach a 50. you just answered you own question bro ... I'm talkin old school and you are referring to new school ... BIG difference ... Sub amp I have now is 50 watts rms and i can do a consistant 137.7 db at 28 htz ... Whats so hard to understand ??

On the Audio Control? lol B&K Bro ... legal, in the record books ... I am forced to call BS on that. 45 watts rms and a sealed box does 50's? How do I do that? Class A/b amp bro ... how old were you in 1992 ??

On the Audio Control? lol B&K Bro ... legal, in the record books ...

WOW !!! Sounds like a party barge ...

Cool bro ... Be shure to post a build log and show off alot of pics ...

pics of boat ??

Thats cool with me guys, your show. Its fun to read.

Welcome to SSA Bro ... top right hand corner of your screen ...