Can F1s output/speaker grounds be tied?

cfcubed · 10th June 2009, 03:22 PM

Sorry if this has an obvious answer... I did try searching.

I'm considering putting a "speaker protector" (DC offset sensing) in a (re-)build of an F1 clone.
Off-the-shelf solutions (e.g from the bay) appear to have the output grounds tied. Would that be a bad thing for the F1 design?

BTW I'm OK w/having relays in my signal path if it means protection for my drivers, so this is not a question about SQ impact.

Nelson Pass · 10th June 2009, 05:48 PM

The F1 is a balanced output - both outputs on each channel are live
and independent of each other and ground.

cfcubed · 10th June 2009, 06:34 PM

Thank you for the fast reply. I suspected as such but wanted to be sure... That strapping the speaker/output grounds together would be a (very) bad thing for the F1 design.

Nelson Pass · 10th June 2009, 09:29 PM

It would not break, but it wouldn't sound good either.

h_a · 11th June 2009, 05:21 AM

@ cfcubed: hi, I have a set of dc-protector pcbs at hand that handle balanced outputs. Mail me if interested!

Have fun, Hannes

10th June 2009, 03:22 PM	#1
cfcubed diyAudio Member Join Date: Jul 2007	Can F1s output/speaker grounds be tied? Sorry if this has an obvious answer... I did try searching. I'm considering putting a "speaker protector" (DC offset sensing) in a (re-)build of an F1 clone. Off-the-shelf solutions (e.g from the bay) appear to have the output grounds tied. Would that be a bad thing for the F1 design? BTW I'm OK w/having relays in my signal path if it means protection for my drivers, so this is not a question about SQ impact.

11th June 2009, 05:21 AM	#5
h_a diyAudio Member Join Date: Sep 2006 Location: Graz, Austria	@ cfcubed: hi, I have a set of dc-protector pcbs at hand that handle balanced outputs. Mail me if interested! Have fun, Hannes __________________ fresh matched IRFP240/IRFP9240 fets \|\| AlephJ/JX-kits F5 transistor kits \|\| Burning Amp BA-1/2 transistor kits

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10th June 2009, 05:48 PM	#2
Nelson Pass The one and only Join Date: Mar 2001	The F1 is a balanced output - both outputs on each channel are live and independent of each other and ground.

10th June 2009, 06:34 PM	#3
cfcubed diyAudio Member Join Date: Jul 2007	Thank you for the fast reply. I suspected as such but wanted to be sure... That strapping the speaker/output grounds together would be a (very) bad thing for the F1 design.

10th June 2009, 09:29 PM	#4
Nelson Pass The one and only Join Date: Mar 2001	It would not break, but it wouldn't sound good either.