Replacing The Manufacture’s Jumper Bar

[GeorgeBynum]

Due to the curved and very rigid sides, internal bracketing from the sub cabinets and the extensive use of dampening foam (just like the picture).

John, you know better

 

[ta240]

I mean in one sense we don't have a theory for gravity so much as an observation of how it works. Do we need special tests to convince someone that if we drop something it will fall to the ground absent any special conditions like say an airplane?

Technically, since up and down are relative does it so much fall as just get pulled towards the ground?

 

[ta240]

View attachment 306967

 

[Blumlein 88]

Technically, since up and down are relative does it so much fall as just get pulled towards the ground?

Our inner ear evolved in the presence of gravity on earth. It tells our brain which way down is. The direction of greatest gravitational pull. So subjectively it falls though objectively it gets pulled.

 

[Deleted member 48726]

I'm with you on this one bud, I've replaced the solid, shit-tier jumpers with OFC jumpers on every pair of speakers I've owned for the last two decades. The ones I typically use have banana plugs on one end and spades on the other so that one set of binding posts are left open for your actual speaker cables.

Like so:

View attachment 307865

What cables do you use in your systems?

But the difference after installing the wire jumpers is not imagination. How do you know that?

www.audiosciencereview.com

 

[TheBatsEar]

I'm with you on this one bud

Are you somewhere in Germany? I feel this would be worth it to verify or rebuke in a blind test.
I firmly believe this can't be heard, so it would be interesting to come up with a method to test it first, then do the tests, then one of us has to yield.
Grilled meats and beer could be involved.

 

[egellings]

John, you know better

To dampen means to add moisture. To damp means to reduce a resonant peak amplitude.

 

[Blumlein 88]

To dampen means to add moisture. To damp means to reduce a resonant peak amplitude.

So damped rather than dampened?

 

[egellings]

So damped rather than dampened?

Yes. As an example, "The vibration was damped by applying the undercoating.". Dampened always means to add moisture or wetness, usually water, to something.

 

[Travis]

So damped rather than dampened?

I think the beef is with Crown when they started publishing the “dampening” factor of their amps and others followed.

When they they change to damped-ing factor, so will I.

 

[Dougey_Jones]

Are you somewhere in Germany? I feel this would be worth it to verify or rebuke in a blind test.
I firmly believe this can't be heard, so it would be interesting to come up with a method to test it first, then do the tests, then one of us has to yield.
Grilled meats and beer could be involved.

I wish, friend. I’d show up for the grilled meat and beer, and be happy to be proven wrong. Alas, I live in sunny Scottsdale, AZ.

 

[bleepbloop]

Just found this thread... I was thinking about buying a pair of Jamo C97 II, I still may. I watched a video GR Research did on a pair of bookshelf Jamo's and the jumpers did indeed have some resistance. He saw the issue during anechoic testing and then measured 2.84 ohms of resistance in a jumper! Crappy jumpers can make a difference, watch at about 11 minutes in, the video is called: "Micca RB42 and Jamo. A Tale of two speakers! Cheese or no cheese?"
:

 

[Deleted member 48726]

Just found this thread... I was thinking about buying a pair of Jamo C97 II, I still may. I watched a video GR Research did on a pair of bookshelf Jamo's and the jumpers did indeed have some resistance. He saw the issue during anechoic testing and then measured 2.84 ohms of resistance in a jumper! Crappy jumpers can make a difference, watch at about 11 minutes in, the video is called: "Micca RB42 and Jamo. A Tale of two speakers! Cheese or no cheese?"
:

He can keep his cheese. Don't trust him.

 

[antcollinet]

and then measured 2.84 ohms

The only way a jumper of the construction typically used could measure 2.84 ohms is if it is not connected properly, or has a resistive coating.

 

[bleepbloop]

He can keep his cheese. Don't trust him.

I'll measure the jumper myself if I buy the C97 II. I have watched quite a few of his videos on making better crossovers for many different speakers, seems to know what he's doing. I trust him, but to each their own.

 

[bleepbloop]

The only way a jumper of the construction typically used could measure 2.84 ohms is if it is not connected properly, or has a resistive coating.

I agree, seems impossible in such a short span with any type of electrically conductive metal. I am still going to measure myself if I do buy the C97 II's.

 

[antcollinet]

I'll measure the jumper myself if I buy the C97 II. I have watched quite a few of his videos on making better crossovers for many different speakers, seems to know what he's doing. I trust him, but to each their own.

Don't forget to use the correct measurement method for a low resistance (account for test probe resistance) and make sure you have a zero resistance connection to the jumpers.

 

[bleepbloop]

Don't forget to use the correct measurement method for a low resistance (account for test probe resistance) and make sure you have a zero resistance connection to the jumpers.

Always do.

 

[Deleted member 48726]

I agree, seems impossible in such a short span with any type of electrically conductive metal. I am still going to measure myself if I do buy the C97 II's.

So. -Do we think Jamo has accidently used the worst possible barely conducting material for their speakers.

OR

Is the well known snake oil salesman trying to sell something by polishing his results a bit.

Tough one..

 

[bleepbloop]

After watching the video once, I'll always measure my jumpers twice.