Ampeg Isovent - Jack Plate Circuit Board.

[crazyBassClown]

Are they still using them now?

Nah, they moved onto the most metal amp ever. The roland JC120.

I still can't believe the number of posts back in the day "I just got a jc120 but the distortion is rubbish. what's wrong with it?"

 

[Coolhandjjl]

Could be the bass too. On one of my bass’s, the D on the E string produces a huge wolfy tone with weirdly loud resonances. D on the A string, all is well.

 

[DJ Bebop]

Nah, they moved onto the most metal amp ever. The roland JC120.

I still can't believe the number of posts back in the day "I just got a jc120 but the distortion is rubbish. what's wrong with it?"

I knew that.
I was just waiting for the OP to acknowledge that fact. If it's such a killer cabinet design, they'd still be using them
The JC120 is a great platform for pedals, IMHO

 

[crazyBassClown]

I knew that.
I was just waiting for the OP to acknowledge that fact. If it's such a killer cabinet design, they'd still be using them
The JC120 is a great platform for pedals, IMHO

It sounds great by itself. The clean sounds metallica got from it are awesome.
The number of people who heard metallica used it and then went and got one for distorted sounds still amazes me though.

 

[DJ Bebop]

I don't know.

Something is causing the F Bomb and I am curious to know what it is.

I will cross that bridge when I get to it.

.

After all that's been said. I like my answer. It's a glue, joint, structural problem

 

[frankie5string]

After all, that's been said. I like my answer, it's a glue, joint, structural problem

Comma chameleon?

 

[DJ Bebop]

With all due respect, I am going to take the Jack Plate and Schematic Diagram to a friend, and while I am at work doing my job, have him ReWire the Jack Plate minus the Crossover Circuit Board, and see what this does.

What you all have said is the Crossover is NOT part of the equation, when the 210s and 215s are connected to the Crossover Board, but at least this way we can fully Exclude the Crossover Circuit Board.

If this Does NOT Solve the problem, then I will see what I learn, and reconsider the problem.


.

What you will no doubt learn is, it wasn't the crossover.

 

[Jim Carr]

troll.

 

[DJ Bebop]

troll.

 

[agedhorse]

What do Inductors and Caps do?

A little (VERY) basic electronic education would go a long way towards understanding why these parts have nothing to do with your problem.

It protects the tweeter only. The BFM cabs I’ve built used fuse style lamps as tweeter protection. First time I’ve seen a bulb style used

Both styles were used in the earlier days.

I am NOT an EE guy but I do know a little something.

Convince us, please!

What next?

At this point, an incinerator might be a good choice.

Okay sounds good, but what could ne Building Up an Intense F?

Something tells me that between Choking and Blocking is a Build Up of F Frequencies causing the F Bomb to Overload.

The "something that tells you" is wrong, confused or crazy.

For example what would be a better way of protecting against the Slamming Overloading - besides using a light bulb?

The light bulb, just like the capacitor, choke and resistors, affect the tweeter only. It has nothing to do with your problem, but if you would bother to learn a little more, you would be able to see how rediculous your comments have been

How can I pass All Frequencies without building up the F Bomb?

You already are, you just don't know enough to understand this.

Um er - do you play Bass or Guitar?

You sound like a Guitar player who is In Over Your Head on this Bass site.

Really? The more you say, the more you confirm what we already know. You leave no doubt.

Okay since I took the stupid tweeter out of the diagram then I no longer need the light bulb.

Outstanding.

Now we are starting to get somewhere with the problem.

No, we are continuing to go backwards, you are now officially unlearning something you already knew nothing about. Without a tweeter, the lamp and everything else on the board is already disconnected from the circuit.

Maybe you misunderstood me.

I am trying to get rid of the F Bomb which seems to be in common with both the 210s and the 215s, and this common point is the Crossover Circuit Board.

How about that?

There is something on the Crossover Circuit Board causing the Build Up and Intensification of the F frequencies thereby causing the F Bomb.

I am trying to get rid if the F Bomb.

The Crossover Circuit Board seems to be the Source of the F Bomb.

This is the common point is the Crossover Board and this means something ON the Crossover Board is Building UP F Frequencies causing the F Bomb.

Get It?

Now what is that something

Your logic is beyond obtusely incorrect, there is absolutely nothing on the crossover board that could possibly cause your problem.

Moreover, I didn't get on here because I knew what I was talking about. I got on here to ask you all how I can get rid of the F Bomb short of getting rid of the Isovent speaker cab.

And what does an SS PA Amplifier look like.

Now since you know so much then WHAT on this Crossover Board is causing the F Bomb?

And with a bit of Extreme Humor I say - NOW Answer The F-ing Question!!!

Since YOU already know it all, why do you even come here to ask questions? You don't even know what you don't know, AND you are stubbornly abrasive too, which makes it impossible for ANYONE to help.

With all due respect, I am going to take the Jack Plate and Schematic Diagram to a friend, and while I am at work doing my job, have him ReWire the Jack Plate minus the Crossover Circuit Board, and see what this does.

What you all have said is the Crossover is NOT part of the equation, when the 210s and 215s are connected to the Crossover Board, but at least this way we can fully Exclude the Crossover Circuit Board.

If this Does NOT Solve the problem, then I will see what I learn, and reconsider the problem.

Anyway Thanks for all of your help in this matter, anyway as far as it went, and thanks for the Good Humor along the way.

I hope you all realize I was chuckling as the bantering went back and forth and I was only being funny and meant nothing by it.

.

Good luck, hope your friend has thick skin.

I don't know.

Something is causing the F Bomb and I am curious to know what it is.

I will cross that bridge when I get to it.

.

Cross that bridge, please cross it at your earliest convenience. Keep on going too, I hear there are answers to everything (including the meaning of life) on the other side of the bridge.

 

[vid1900]

When we build & test subs, we run them out to the center of the lawn behind the shop - so we have no interaction with the walls in the building.

Without any room reinforcement, we know our measurements are good.

I gently suggest you get a 50 ft extension cord and see if you still have problems far from any walls or wooden fences.

 

[Indiana Mike]

 

[Jeff Scott]

Okay you guys (& gals),

Removed the Crossover Circuit Board.

This is it - front & back.

What do you see?

.

I see what looks like someone threw up on the board...................

 

[Jeff Scott]

NO. This means something ON the Crossover Circuit Board is causing the B Bomb problem.

I will have to get separate 1/4 inch jacks before ReWiring it.

So, now it's a B Bomb, so something has changed.

 

[Jeff Scott]

Why use the bulb for a Limiter?

What is the purpose of Limiting and the use of the bulb?

What are the other components on this board?

Here's our answer, folks, I think.

 

[frankie5string]

So, now it's a B Bomb, so something has changed.

Don't encourage the boy!

 

[Jeff Scott]

Okay since I took the stupid tweeter out of the diagram then I no longer need the light bulb.

Outstanding.

Now we are starting to get somewhere with the problem.

A lightbulb moment!

 

[seamonkey]

Nah, they moved onto the most metal amp ever. The roland JC120.

I still can't believe the number of posts back in the day "I just got a jc120 but the distortion is rubbish. what's wrong with it?"

Dimebag Darrel played the played the Hell out of his JC120!

 

[Jeff Scott]

I am going to tell my friends that You ALL Busted my chops but I Stumped you all - On The Problem.

We'll see who wins.

How old are you?

 

[Jeff Scott]

...I'm pretty sure none of us can solve your resistance to reality...

 

[DJ Bebop]

So, now it's a B Bomb, so something has changed.

I'm just waiting for the Phil Bomb