The F5X Preamp - Page 6

EUVL · 24th December 2012, 09:16 AM

We won't make the source code public.
But we can manage to support two versions I think.

Patrick

Horio · 24th December 2012, 03:53 PM

Thanks Patrick. Looking forward to the next (last?) installment on the preamp. This unit should perfectly fit the needs of my system.

Have a great holiday!

TheShaman · 24th December 2012, 09:08 PM

Knowing how you love SMDs, I was almost certain we'd see MELFs on the attenuator!

Merry Christmas Patrick and Xen gang!

EUVL · 25th December 2012, 05:16 AM

Actually none. See post#2.

Patrick

TheShaman · 25th December 2012, 01:25 PM

I know, I was surprised!

jam · 25th December 2012, 07:41 PM

Bravo Patrick.............best project in a while.

How about a conceptual schematic (block diagram/flow chart). Definitely a must build.

Thanks and Merry Christmas...................

Regards,

Jam

APK · 27th December 2012, 11:54 AM

Patrick
Is it possible to run two preamp boards in your case, as I am using J Rivers MC18 as my sole source and crossover (as i cant find a suitable balanced crossover to place after the preamp) outputting two signals, Hf,LF, over USB into a exaU2I Multichannel Asynchronous USB to I2S Interface, into two dacs, into two? preamps, feeding two of your FX5's. Or can anyone suggest a better way of going active balanced ?
Tony

EUVL · 27th December 2012, 12:10 PM

A friend is using F5XP & F5X for active crossover for his 2-way bookshelf.
He is going to use the F5XP to drive a purely passive filter network (LF & HF parallel).
These networks are followed by JFET follower, which then drives the F5XP.

I consider this a good solution indeed.

Patrick

APK · 27th December 2012, 02:48 PM

Thanks for the idea, LF & HF Parallel to obtain the balanced output? Any further details would be of great help.

Tony

EUVL · 28th December 2012, 06:49 AM

No.

LF & HF in parallel so that you have one preamp driving two filters giving you 2 outputs.
That is per channel, so 4 outputs altogether for 2 channels 2-way active filter.

To use a passive filter followed by source followers, just treat them as single ended and duplicated 2x for balanced.
Suggest you start a new thread and also let other people help you.

Or you send me your X'ovr schematics by email and I'll have a look, when I have time ....

Patrick

24th December 2012, 09:16 AM	#51
EUVL diyAudio Member Join Date: Oct 2003	We won't make the source code public. But we can manage to support two versions I think. Patrick __________________ xen-audio.com

24th December 2012, 09:08 PM	#53
TheShaman diyAudio Member Join Date: Jan 2007 Location: Crete	Knowing how you love SMDs, I was almost certain we'd see MELFs on the attenuator! Merry Christmas Patrick and Xen gang! __________________ "You have a hierarchy: a mathematician, a physicist (which is a failed mathematician), and an engineer (which is a failed physicist)." - Andrew Jones

25th December 2012, 05:16 AM	#54
EUVL diyAudio Member Join Date: Oct 2003	Actually none. See post#2. Patrick __________________ xen-audio.com

25th December 2012, 01:25 PM	#55
TheShaman diyAudio Member Join Date: Jan 2007 Location: Crete	I know, I was surprised! __________________ "You have a hierarchy: a mathematician, a physicist (which is a failed mathematician), and an engineer (which is a failed physicist)." - Andrew Jones

27th December 2012, 12:10 PM	#58
EUVL diyAudio Member Join Date: Oct 2003	A friend is using F5XP & F5X for active crossover for his 2-way bookshelf. He is going to use the F5XP to drive a purely passive filter network (LF & HF parallel). These networks are followed by JFET follower, which then drives the F5XP. I consider this a good solution indeed. Patrick __________________ xen-audio.com


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24th December 2012, 03:53 PM	#52
Horio Newbie diyAudio Member Join Date: Mar 2010 Location: San Francisco	Thanks Patrick. Looking forward to the next (last?) installment on the preamp. This unit should perfectly fit the needs of my system. Have a great holiday!

25th December 2012, 07:41 PM	#56
jam diyAudio Member Join Date: May 2001 Location: Charlotte,NC,USA	Bravo Patrick.............best project in a while. How about a conceptual schematic (block diagram/flow chart). Definitely a must build. Thanks and Merry Christmas................... Regards, Jam

27th December 2012, 11:54 AM	#57
APK diyAudio Member Join Date: Jan 2005 Location: NW	Patrick Is it possible to run two preamp boards in your case, as I am using J Rivers MC18 as my sole source and crossover (as i cant find a suitable balanced crossover to place after the preamp) outputting two signals, Hf,LF, over USB into a exaU2I Multichannel Asynchronous USB to I2S Interface, into two dacs, into two? preamps, feeding two of your FX5's. Or can anyone suggest a better way of going active balanced ? Tony

27th December 2012, 02:48 PM	#59
APK diyAudio Member Join Date: Jan 2005 Location: NW	Thanks for the idea, LF & HF Parallel to obtain the balanced output? Any further details would be of great help. Tony

28th December 2012, 06:49 AM	#60
EUVL diyAudio Member Join Date: Oct 2003	No. LF & HF in parallel so that you have one preamp driving two filters giving you 2 outputs. That is per channel, so 4 outputs altogether for 2 channels 2-way active filter. To use a passive filter followed by source followers, just treat them as single ended and duplicated 2x for balanced. Suggest you start a new thread and also let other people help you. Or you send me your X'ovr schematics by email and I'll have a look, when I have time .... Patrick __________________ xen-audio.com

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