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RP 8000 F Modification Project


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On 3/2/2022 at 6:25 PM, PascalFR said:

Hello

 

could someone confirm that in RP8000 crossover

 

L1=0,29mH
L2=0,49mH
L3=1,34mH

Like in the picture page 1 ?

 

I upgrade crossover of my RP8000 and for inductors i would like to order Jantzen Cross Coil 16AW to replace them. I order components during the time i wait to receive speakers i ordered and will receive soon

 

For capacitors i ordered Claritycap CMR, Audyn Cap Plus and Paper Oil, Mills resistors and Audioquest Q2 + SILVER SPIRIT CuAg cables

 

Thank you in advance

 

Cordially

 

Pascal

You can compare your values with ours at the schematic we´ve done . It´s the same X-Over as the RP 280 F

 

671281811_WeichendiagrammRP8000F.jpg.8e1393f7033adb0fb72b667047165147.jpg

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We´ve finished our moddy project so far , we installed the new internal wiring 2 x AWG 14 mono cristalline Copper

 

1487735001_RP8000DmmungInnenverkabelung.thumb.jpg.0f649b7fdd64166d63e2ce7832053b51.jpg931192445_InnenverkabelungRP8000.thumb.jpg.ff9d184689e5389b0f3c6834c8f3f8cc.jpg1522844984_TerminalRP8000Neu.thumb.jpg.6c46fe3b6abaab46d07954ca8fc9edbf.jpg

 

The new external X-Over´s ( Jantzen / Mundorf ) are working fine ......

 

1632130118_XOverRP8000.jpg.4cac3284e9a20e26dc4d0d2888d51915.jpg930843365_WohnzimmerRP8000.jpg.ee4c7666eef1a03fb7c6455b0041575f.jpg

 

We gonna do some measurements soon.

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  • 2 weeks later...
On 3/6/2022 at 9:41 PM, chips666 said:

Same cross-over schematics and values or modded ?

The same values , none modification so far , we wanna collect some experience and measurements first.

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On 3/6/2022 at 2:53 PM, OzBrit said:

Looks good micromara

 

Looking forward to seeing the results and hearing how they sound compared to the originals

Will take a while as my friend is a navy soldier and he´s another 3 month on the sea. Once he´s back we´ll continue.

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  • 2 weeks later...
Did you measure the impedance of the woofers and tweeter ?
Simulating the response of the crossover in VituixCAD with 8 ohm speakers it can be seen that there is a lot of room for improivement in these crossover.

Rack_1.jpg

RP8000F_Crossover.png

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  • 4 weeks later...

Hello

 

this is the real crossover of RP8000F with values you can read on the PCB when you remove coils

 

I replaced :

 

6,2µF by Clarity Cap CMR 4,7µF and Audyn Cap Plus 1,5µF in parallel

10µF by 10µF/160V MGBO-2 paper in oil  + 8,2nF Teflon in parallel

24µF by 20µF 160V MGBO-2 paper in oil + 4µF SCR Smart Cap (new capacitors from SCR) + 10nF Vitamin Q

 

0,51mH and 0,3mH by Jantzen Cross Coil 16AWG 

1,35mH by Jantzen Air Core Coil AWG 16 or 18 which is enough

 

Resistors by  Ohmite Audio Gold 12W, for the 3,5 ohms replaced by 3,9 ohms, better for tonal balance (i added a Fostex FT17 tweeter on top with just an old 0,5µF paper oil Siemens for filter)

 

On HF i replaced cable by silver cable SILVER SPIRIT CuAg 2x2.5mm² 

On BF  AUDIOQUEST Q2 cable

 

binding posts of the terminal replaced with high quality ones like MicroMara done here (HF and BF are linked with silver rigid cable internally because i use only one amplifier, a SE 2A3 DIY)

 

and like him reflex port and the housing for the horn and the back of the dispersive horn damped with alubytul

 

The result is ..... marvelous !!!! I have the feeling of having an other speaker than the original. I made changes little by little, for example i replaced coils only on one speaker and test to see the difference, and replace them by Jantzen cross coil and air core is a great change !

 

Cordially

 

Pascal

Filtre Klipsch RP8000F.jpg

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  • 3 weeks later...
Posted (edited)

Looks like a great upgrade with the quality of components you used

 

I'd be interested in hearing how the speakers have changed without any changes in the crossover design (except for a slight falling off at the top end)?

Edited by OzBrit
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Hello

to be honest it is like night and day. Before my upgrade less definition, less dynamic, not the new feeling i have now that the music is live in the room.

After modification the difference between RP8000F and RF7 is not so big, it is like now more if the RP8000F is made for a 20m2 room like i have and the RF7 for a 30m2 room

Cordially

Pascal

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1 hour ago, PascalFR said:

Hello

to be honest it is like night and day. Before my upgrade less definition, less dynamic, not the new feeling i have now that the music is live in the room.

After modification the difference between RP8000F and RF7 is not so big, it is like now more if the RP8000F is made for a 20m2 room like i have and the RF7 for a 30m2 room

Cordially

Pascal

Well, I have no doubt whatsoever about your statement. Even the modification without changing the X-Over values themself is an incredible leap in the area of precision, timing accuracy and step response of the chassis. The sound image in the entire frequency spectrum is much more homogeneous, the sound stage is larger in depth and width. Details that were only to be guessed at are now clearly audible, not only that, but also the localization of instruments and voices is significantly improved in the spatial staggering and stage structure.   

 

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