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[Buck 5,000+ posts]

 

[Buck 5,000+ posts]

 

[Buck 5,000+ posts]

 

[RobGMN Premium Member]

Oh I can't wait to hear this. When were you building these aperiodic enclosures and in what were you installing them?

It was around 1995-97. First one I did went in a Honda Prelude. Driven by a Hifonics Zeus or Thor amplifier. Sony or Pioneer head unit.
The bulk of installs I did were sealed box or true isobarics (not the Kicker "Isobaric" single-driver subs), with over-driven Rockford amplifiers.
It was a time when installers were doing anything to distinguish themselves from other shops. If you did custom speaker pods and "stock looking" installs, the money flowed. And then Crutchfield started selling pre-fab pods and panels...

 

[RobGMN Premium Member]

I design enclosures mostly with a mouse and keyboard.

Without any of the woofer specifications?

 

[RobGMN Premium Member]

Lol. Almost every slot port ever built has a 90 degree L-port. Most boxes would require a side fired port to even fit a straight port into the design. Rob googled some stuff and thinks he knows how things work in the real world. Everyone here knows who’s full of shit.

Yep. All of the best speaker designers use 90 degree angles in their ports. And then they spend tons of money on R&D figuring out how to make the exterior end of the port as quiet as possible.
Logical.

As I said, you can make noise or you can make music. Your choice.

 

[RobGMN Premium Member]

He hasn’t built more than 3 enclosures his whole life. You don’t need to even lower yourself by speaking to him about audio. Speaking to him will only defile the reason we are on this forum.

You are in this forum so you can chat on a Biden/Harris thread? Then why are you upset that people are on the Biden/Harris thread? Are you a self-hater?

 

[SlugButter]

Yep. All of the best speaker designers use 90 degree angles in their ports. And then they spend tons of money on R&D figuring out how to make the exterior end of the port as quiet as possible.
Logical.

As I said, you can make noise or you can make music. Your choice.

Lol. Okay. Whatever you say speaker pro.

 

[ThxOne Premium Member]

It was around 1995-97. First one I did went in a Honda Prelude. Driven by a Hifonics Zeus or Thor amplifier. Sony or Pioneer head unit.
The bulk of installs I did were sealed box or true isobarics (not the Kicker "Isobaric" single-driver subs), with over-driven Rockford amplifiers.
It was a time when installers were doing anything to distinguish themselves from other shops. If you did custom speaker pods and "stock looking" installs, the money flowed. And then Crutchfield started selling pre-fab pods and panels...

Kicker "Isobaric"... maybe the Solobaric? I remember way back in the day say oh around in exactly 1990 when I first got into car audio and listened to a pair of original and new at that time, Kicker Comp 10's and they blew me away. I helped build an isobaric enclosure in 1991 in a Cavalier Z24 where we had to remove the back seat back and cut the bracing to fit the box in. 4 Orion 12's and a Punch box sitting on top of that with two 10's. He shattered a front window to the local K-Mart costing him $5k. The only aperiodic enclosure I have run into in all these years was from a very high end shop in Florida and was a single sub mounted in the front passenger foot well/floor. It had a flexible membrane to the rear of the enclosure which was exposed to the outside of the vehicle.

Was this just a hobby of yours or did you work at a high end audio shop? I am curious because both Isobaric and Aperiodic take knowledge and skills to pull off correctly. I am just not sure a person such as yourself who misquotes so easily or ignores portions of text or shows low comprehension skills would retain the knowledge to effectively construct these types of enclosures. If I am wrong here, I apologize... this is the first real car audio related post I have personally seen from you.

 

[ThxOne Premium Member]

As for the slot ports and 90's. I have seen a Martin Logan with a slot port. The Dynamo 1600x is one.

 

[SlugButter]

As for the slot ports and 90's. I have seen a pair of Martin Logan's with slot ports.

I had an old focal with a straight slot port. Side fired. Had to do 10 sq. Inches of port area per foot to make it work without a bend. Side fired ports are OK in a truck or home, but in alot of vehicles that is not a good orientation.

 

[RobGMN Premium Member]

Lol. Okay. Whatever you say speaker pro.

Not a pro. That's why I listen to what the pros say.
Unlike some people who "do their own research" and reach unsupported conclusions that contradict what the pros find.

 

[SlugButter]

Not a pro. That's why I listen to what the pros say.
Unlike some people who "do their own research" and reach unsupported conclusions that contradict what the pros find.

I think you listen to the pros but haven't done the actual work. If you did enough designs you'd find that a straight port is just not possible in most vehicle box designs while still maintaining orientation goals, port tuning and port area. In a house setup its more feasible

 

[RobGMN Premium Member]

Kicker "Isobaric"... maybe the Solobaric? I remember way back in the day say oh around in exactly 1990 when I first got into car audio and listened to a pair of original and new at that time, Kicker Comp 10's and they blew me away. I helped build an isobaric enclosure in 1991 in a Cavalier Z24 where we had to remove the back seat back and cut the bracing to fit the box in. 4 Orion 12's and a Punch box sitting on top of that with two 10's. He shattered a front window to the local K-Mart costing him $5k. The only aperiodic enclosure I have run into in all these years was from a very high end shop in Florida and was a single sub mounted in the front passenger foot well/floor. It had a flexible membrane to the rear of the enclosure which was exposed to the outside of the vehicle.

Was this just a hobby of yours or did you work at a high end audio shop? I am curious because both Isobaric and Aperiodic take knowledge and skills to pull off correctly. I am just not sure a person such as yourself who misquotes so easily or ignores portions of text or shows low comprehension skills would retain the knowledge to effectively construct these types of enclosures. If I am wrong here, I apologize... this is the first real car audio related post I have personally seen from you.

Yes. the Solobaric. It was designed to emulate the isobaric loading achieved by using dual woofers wired out of phase and mechanically "locked" to each other. The biggest isobaric I did was with 4 15" Petras woofers in a face-to-face push-pull configuration in a Toyota 4-Runner. The woofers were one-offs, made for us by Petras as they were breaking into the market. The amp was HiFonics, possibly a Zeus (they only had 3 models at the time, I think). We used HiFonics or Rockford amps mostly, but would install whatever the customer wanted.
The same customer had the vehicle converted to a soft-top (no one said money=taste).

We were not a "high-end" shop, but had wealthy customers in a wealthy area, so we did whatever they wanted and they paid what it cost. We were not a "buy a head unit, get a free install" shop. We were a startup doing car upgrades of all kinds (HKS, Trust, Greddy, BBS, Enkei, Veilside). Rich kids with money were a good source of our income. They wanted to be able to go to their friends and say they had something no one else had. Imagine spending $3K on Naca ducts for a Mitsu Eclipse. Yeah, that's the kind of silly money they spent. So, if they saw something in Car Audio or Car Stereo Review, they wanted to be the first on THEIR block to have it.

Car Audio started to change very quickly and we found we were making more money at doing the speed upgrades, and that was what customers were asking for. It was hard to keep up with the industry without focusing on it 100%. I would have LOVED to be doing shit like laser interferometry for proper imaging, gutting and replacing a complete interior for audio, etc etc, but it wasn't to be. We let the money steer the business, despite my desire to focus on car audio. Gotta' pay the bills.

I was MECP certified, but TBH it was not a terribly difficult certification to get. Most of what I learned was from doing.

 

[RobGMN Premium Member]

I think you listen to the pros but haven't done the actual work. If you did enough designs you'd find that a straight port is just not possible in most vehicle box designs while still maintaining orientation goals, port tuning and port area. In a house setup its more feasible

Curved ports are not impossible. Not always easy, but not impossible.