Three way electronic crossover

[grapplesaw]

300 watts on those BMS drivers will seriously affect your hearing.

Right you are but these are 16 ohm diaphragms
maybe I’ll just use the 100 watts to start for the BMS or some fuses at least.


Update this amp is first gen and may have higher noise than my other unit. There are some tweaks to reduce THD+N

the current spec’s are in attached doc
well see. It’s a bit like putting a hemi on the dyno in nick’s garage, check that out on YouTube

 

[grapplesaw]

Testing the new RANE AMP. All good when run through 8 ohm loads. .04% THD+N . THERE ARE UPGRADES to lower this as in my other newer series Rane amp at about .009% .
I’ll leave it alone.
only thing to tweak is fan speed . It has 200 ohm blocking resistor for low speed . Not sure what I’ll need but though could if need use a three sped control.

look how clean this thing is for 1984 amp

 

[laatsch55]

Lot of IC's for an amp. Looks well built. Got the big Sanken outputs...

 

[grapplesaw]

Lot of IC's for an amp. Looks well built. Got the big Sanken outputs...

Top shelf Lee
it has a limiter circuit in there that can be removed .

 

[laatsch55]

Some familiar numbers on some of those transistors...

 

[grapplesaw]

Remember Rane started with a bunch of Phase Linear people And still running in Everet Washington so parts are engraind into them. Even the schematic and service manual are drawn the same way as Phase Linear

 

[GeorgeP]

So far the Best solution to convert unbalanced to balanced is a fail. Do need your help here everyone.

so I best talk about what these things do

there many articles on this conversion of balance and unbalance which I will attach links to. The first one is useful for my system as are all the others are worth the time.

https://www.ranecommercial.com/legacy/pdf/ranenotes/Sound_System_Interconnection.pdf

https://www.ranecommercial.com/legacy/pdf/ranenotes/Grounding_&_Shielding_of_Audio_Devices.pdf

https://www.boxcast.com/blog/balanced-vs.-unbalanced-audio-whats-the-difference?hs_amp=true

https://www.iconoclastcable.com/story/rcaxlr.pdf

https://www.jensen-transformers.com/wp-content/uploads/2014/08/an003.pdf

https://www.jensen-transformers.com/wp-content/uploads/2014/08/an004.pdf

https://www.ranecommercial.com/legacy/pdf/old/bb44x_data.pdf

https://www.ranecommercial.com/legacy/pdf/old/fbb44dat.pdf

https://tascam.com/downloads/tascam/383/LA-80_manual.pdf

https://tascam.com/downloads/tascam/383/LA-80_TECHDOC.pdf

Use an electronic op-amp solution. Drive both +/- inputs for balanced line receiver, then do the inverse for the balance line driver / transmit side with an overall gain at 1 on both. No magnetic coupling, no ac fielding pick-up. Will need a +/- supply...but its a cleaner solution with no phase shift that transformers have.

 

[Gepetto]

DRV13x Audio-Balanced Line Drivers datasheet (Rev. B) (ti.com)

 

[grapplesaw]

Use an electronic op-amp solution. Drive both +/- inputs for balanced line receiver, then do the inverse for the balance line driver / transmit side with an overall gain at 1 on both. No magnetic coupling, no ac fielding pick-up. Will need a +/- supply...but its a cleaner solution with no phase shift that transformers have.

Thanks George
My issues were from poor cable rooting and ground faults

I have a Tascam la81 which does what you pointed out
I also have the transformers which have the advantage of blocking dc and total isolation. These are working for me
As to phase control I have the ability to adjust and actually fooled around with on he weekend

it looks as you have valuable insight on this subject