Hmm....Whats this???

Transmission Line Build

Hey guys...got finished this up a lil bit ago.



I wonder what it is???

Any guesses??

 

actually its a transmission line for a 12W6 but I threw my EHQS 12 in there to see how it would sound...haven't gotten a chance to test it out yet though

 

Indeed...its a 1/4th wave transmission line...its a wave guide of sorts.

read here for more information.

Quarter Wavelength Loudspeaker Design

 

I would have used 45's but my circular saw was f'in up.

Its 1/4 wave line length is around 31Hz. I'll do some more testing tomorrow and tell you how it goes. So far it is pretty impressive

 

Whats up guys...I took a small vid today. my sister's camera has barely any memory on it so 29 seconds is all I got.

As for how it sounds...FUKIN AWESOME. The tonality is a lot different from the 2.5 cu ft @ 30Hz box it the EHQS was in. This thing digs deep and has usable response down to 25Hz testing with sine waves...below that it unloads and doesn't have much output. It has a pretty flat response from 28 - 60Hz. I really love how it sounds. It's easy to tell when the EHQS is reaching its mechanical limits as I can hear it bottoming out but that is only on certain beats but overall it slams hard and gets really low but still retains its punchiness and transients.

30-35Hz tones are fun. Compared to the 2.5 cu ft ported...this T-Line rapes it hands down. Only thing is that the box is 38.5" wide and 21.75" deep lol. But I don't need cargo space.

I think everyone should get to listen to a transmission line enclosure...it does really have a different sound to it.

Anyways...heres a little vid

 

its discontinued...sadly enough

 

Quarter Wavelength Loudspeaker Design has a lot of useful information

Today I put in the 12W6 and WOW...it is even BETTER. It's a lot louder than the EHQS 12. Slams the lows really really well.

I went to a couple shops here and asked some people what they thought was in the back...test track was of course Euphoric Midnight Bass - Track 11

The first shop theres a guy with four 12's sealed off 2000 watts in his dodge avenger....he guessed I had two 15's and 1000 watts.

Owner of the first shop is more experienced....he guessed one 12 and 800-1000 watts.

Next shop a guy there guessed three 10's and 1000 watts.

second guy at the next shop guessed a single 12 and 1000 watts.

Sounds really good to me for a single 12 and 200-250 watts without impedance rise.


Tomorrow I'll take some more videos. This is one efficient enclosure.

Enclosure is 38.5" wide, 21.75" deep, and 16.5" tall

 

Hard bass??? Everything sounds really good on it. It isn't sloppy at all. Keeps up with everything I throw at it. The tonality really is different than a regular ported box...its hard to explain. Everything sounds "thicker" and it shakes everything a lot more.

I am going to build another transmission line but tuned a little higher next time.

 

It's reponse starts to roll off around 60Hz...It is crossed over at 63hz from the HU

 

Short vid