Charge coulpled L96/3313B crossovers?

[Robh3606]

Hello Nathan

That goes to ground, negative input ie schematic negative of the drivers, all the same point, not the individual driver negs which can be used in either polarity depending on the system design.

http://www.lansingheritage.org/html/...3-k2-s5500.htm

JBL uses CC Solen networks in the Everest. There was quite a row about that and if the Solens were good enough. My point of view is the designer is happy with this. He knows what he's doing and I would make them a starting point as they are relatively inexpensive. Have a listen and if you feel the need try the more expensive audiophille caps. Send Ian a PM as he has tried different caps in his 4345's for an opinion. I have a pair of 4344 Ian built the networks for using Holovands?? and they are sweet!!! Bottom line is you really need to give it a go yourself to see which you like best.

Rob

[X_X]

Thanks Rob!


When you are building a cost no object speaker and Solens was the capacitor of choice (in an area where ANY big$ capacitor could have gone in there), it is testament to both the quality of the brand, and the subjective nature of audio. I already wired in Solens, so I'll know soon enough.

Is there any advantage to bypassing capacitors in a charge coupled network?

Nathan.

[Robh3606]

With the Solens the word is they sound better without when run in a CC network.

Rob

[Nightbrace]

With the Solens the word is they sound better without when run in a CC network.

Rob

Hmm, I'm pretty sure mine are Dayton , but they still sound good.

[Zilch]

I've posted an oscillograph of charge-coupling in action in these forums.

It moves the operating point to 9V, and signals with negative peaks less than that don't go through zero. Thus, there is no charge reversal or zero-crossing distortion.

In theory, it would work just as well around -9V if the battery is reversed, which I've done inadvertently on occasion. One side goes to "common," is all, assuming there is one in the circuit. Audio is AC.

Bypassing operates differently, but is generally regarded as unnecessary when biasing is used.

I quit bypassing when I switched to Solens, anyway....

[Zilch]

Here's the tentative parts list. Criticism welcome:

[I'm scanning a board layout. It's 9.5" x 6.0". Takes room to charge-couple.... ]

[Nightbrace]

Sorry I didn't notice this sooner, I will get pics of my nets and the parts list when I get home. I didn't know you wanted to get started so quickly.

I can't really comment on the actual building or design theory behind these networks, as I did little more than pay for them and plug and play. All I know is that the sound is fantastic. And I can't imagine why the L96 cannot benefit from the same networks as my 4313B's.

[Aaron]

Is that a subtle hint that I should look into 3113B X-overs instead?
Will that X.O. play nice with an otherwise unmolested L96?
One thing I'm not ready to afford is buying 4313B mids and tweeters.

Assuming the 3113B isn't compatible with an L96:
Is there a way to C.C. the LE10 without demanding that somebody figure out a whole new X.O.?

Fantastic work on your X.O. by the way. =o]

[4313B]

Will that X.O. play nice with an otherwise unmolested L96?

Yep. As you can see by the various network schematics I've posted of the stock systems. The L96, L112 and L150A used a less expensive version of the 4313B network (conjugates removed on the LE10/128 and capacitor value reduced on the LE5 from 16.5 uF to 13.5 uF).

[Robh3606]

It moves the operating point to 9V, and signals with negative peaks less than that don't go through zero. Thus, there is no charge reversal or zero-crossing distortion.

Hello Zilch

With an AC signal why would the peaks effect the DC bias?? I always thought they were mutually exclusive and the AC would ride on the DC. The DC component of the voltage sums would remain constant.

Rob

[Nightbrace]

Hello Zilch

With an AC signal why would the peaks effect the DC bias?? I always thought they were mutually exclusive and the AC would ride on the DC. The DC component of the voltage sums would remain constant.

Rob

They operate independently.

[Zilch]

Hello Zilch

With an AC signal why would the peaks effect the DC bias?? I always thought they were mutually exclusive and the AC would ride on the DC. The DC component of the voltage sums would remain constant.

Rob

Yes, that's correct. With the AC riding on +9V DC, there's no zero crossing until the negative AC peak is -9V. Typically, HF alone never gets there:

http://audioheritage.org/vbulletin/s...34&#post130034

It's also easy to see that big LF would carry the HF along with it through zero. Fortunately, the filters usually separate them....

[Nightbrace]

Yes, that's correct. With the AC riding on +9V DC, there's no zero crossing until the negative AC peak is -9V. Typically, HF alone never gets there:

What will happen should it get to -9V?

[Aaron]

Welly well!
At the very least I'll take those crossovers off your hands and the LE5-9s just to see if they work too.

Thanks for everything, sir!

[briang]

Here's the tentative parts list. Criticism welcome:

[I'm scanning a board layout. It's 9.5" x 6.0". Takes room to charge-couple.... ]

I'll put the order in to PE. Thanks Zilch!

Now, what is your favorite beer?