TC Sounds TC-3000 Thread

[newusername 10+ year member]

Actually, transient response realistically IS frequency response. What most people label as transient response (in regard to subwoofers) refers to the driver's response characteristics in the 70-100 region, where inductive rolloff causes significant response degradation in many subwoofers, due primarily to inductance.
Inductance is the chief limiter of frequency response, and thus the biggest determining factor of transient performance.

Indeed. If you FT (Fourier Transform) transient response, you will get the frequency response.

Neil

 

[Remotia 10+ year member]

Actually, transient response realistically IS frequency response. What most people label as transient response (in regard to subwoofers) refers to the driver's response characteristics in the 70-100 region, where inductive rolloff causes significant response degradation in many subwoofers, due primarily to inductance.
Inductance is the chief limiter of frequency response, and thus the biggest determining factor of transient performance.

That being said, in many setups they sound inaccurate in the 70-100Hz range because they are:

A) Poorly crossed over

B) Poorly level matched

C) The sub is set at far too high of a level for the front stage, thus guaranteeing a response curve that looks like \_____ once it hits the bass region.

This is a bit misleading, while inductance is an important and all to often left out T/S parameter for car audio, it normally limits output from about 90ish-100Hz on up. Not between just ~70- ~100. This is why low inductance is KEY for midrange drivers. If a midrange driver has too much Ls, it will lose efficiency big time, so will a tweeter.

For bass drivers inductance is less important because is plays almost no role in the frequency response where subwoofers are uses most. 15Hz-80Hz

We use shorting rings in our subwoofers to accommodate inductance where we feel it’s necessary. Most car subwoofers do not even use these because they add to the cost and don't increase that silly RMS # that sells a driver to the common kid and only provide a slight improvement in the frequency response up high and actually lower the BL product, lower the sensitivity and make the speaker less loud down low because you have to open up the gap to fit the copper ring inside.

We also use anti-flux modulation shorting rings which it is a much more relative problem with subwoofers because flux modulation will actually cause some serious distortion problems at high outputs in relevant frequencies.

 

[Remotia 10+ year member]

Indeed. If you FT (Fourier Transform) transient response, you will get the frequency response.
Neil

If you can flatten the Fr response, all else tends to fall nicely in line, this why linear response is so critical

 

[DFW40 10+ year member]

Either way this sub is a monster. I have it running off my Diamond D6 1500.1 at .6 ohms according to my DMM. I have the sub in a box that I had for my Brahma that is 2.3 cubes tuned to 28hz which is large for the sub. It gets very very loud and very low in that box. I will try to listen more for accuracy once I get it in a smaller box. I am very please with it thus far.

 

[DaGh0st 5,000+ posts]

clean, any pics of your sub setup?

 

[dennisthamenace 10+ year member]

i built a 4.0 cf box tuned to 29-30 hz, no pics though so use your imagination!!!1

 

[2LouDFoRThiS 10+ year member]

is TCSounds really made by eclipse?

 

[diatribe 10+ year member]

Some of Eclipse is made by TC.

 

[dalucifer 10+ year member]

All of Eclipse is made by TC.

EDIT

 

[dennisthamenace 10+ year member]

wow just installed my new sound stream pic.1700 and wow..... it hits so hard and hits the lows on late night tip to perfection.... couldnt ask for more

 

[smd4life 5,000+ posts]

sealed or ported?

 

[dennisthamenace 10+ year member]

ported about 4cf tuned to 29-30

 

[smd4life 5,000+ posts]

woot

 

[dennisthamenace 10+ year member]

yes its delicious

 

[smd4life 5,000+ posts]

i bet