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Matching Ohm F's with Sansui AU-919...will this be a problem??

I'm sure there's a way to replace the little bugger. Take your time and do it right. A hurried connection that shorts the speaker wires will NOT bode well for the health of the 919. :no:
 
Those plugs are one of the weak spots on the F's. The ones on the bottom of the base on mine were long gone. Snapped of in the manner you described.

Raising the question I can't answer, do you have the ones at the bottom of the base and are they a match for the ones on the support? You may have a ready supply of replacement parts.


Otherwise, you might need to do some shopping. Maybe find some binding posts and drill that wood support.

The wood support that the binding post is on, is glued to the metal frame and the glue is weak after all these years. I know because most of mine got knocked off during shipping. If you find you need to remove them to mount some new posts be very careful around that driver.

Something like this might be long enough for an early generation driver. Late generation drivers had a post too thick for this cure.

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=091-1247
And another problem that you will have is the wire from the top post to the driver, make sure it has plenty of room to move. The bottom comes off the fuse and shouldn't be an issue.
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I bypassed the internal wiring and clamped some hefty Zebra cable to the back of the box and ran it to the binding post. The top clamp takes the tension off the wire.

Be careful, and keep us posted.
 
Holst:

Thanks for the suggestions...I am actually driving out to see Bill at Millersound today...he doesn't like his work messed with about as much as EW doesn't...

:D
 
All fixed - Bill LeGall is simply ACES to deal with...what a quality guy.

Have not had a ton of time to listen to them yet, but two qucik observations:

1) The 919 is having ZERO trouble pushing these speakers...I threw on some Cheap Trick, didn't even get the amp near half-way and I had all the SPL my room needed...

2) MUCH more bass than the "Super 2's"...don't think I'll need a sub anymore...

3) I think that room placement is going to be more of an issue with these than the "Super 2's"...will definitely have to experiment with that...

I understand that some of the things that Bill did to properly position the voice coil and stiffen the spiders may take the speaker away from the way it shipped from the factory, but at the same time, the issue with the voice coil probably started the day they left the factory as well. While it would be nice to compare a pair of factory-perfect F's (in all their inefficient , power-hungry glory) to what I have, that is really not possible, so I will have to judge these on their own merits. The ability to listen to tese speakers at modest power levels is a HUGE advantage for me...we will have to see if I like the sound they produce, and whether the modifications were worth it. What I will say is that Bill LeGall is a freaking magician, and I would encourage ANYBODY who has speaker issues to contact the man.

Off to listen some more...
 
Still getting a hang of these speakers, and I don't know what compromises - if any - that the modification that was done to the voice coil has impaced the original sound, but what I can say is...

WOW!

I am listening to Sonny Rollins' Saxophone Colossus...the volume knob is on -38 (equating to around 9 o'clock)...and I am getting everything I need...VERY full bass...that typical open, smooth Ohm sound...and I don't even think I've gotten the placement right yet. Simply fabulous.

The 6moons article was right...LeGall has figured out the voice coil issue (he said he experimented with his A's with 5 or 6 placements until he found the one he liked)...if you can find a pair of F's that only needs a refoaming and sound coil/spider work (the cones on my F's are in great shape), what you have to do is BEG him to do the work for you.

I am very happy.
 
bebopdeluxe said:
Still getting a hang of these speakers, and I don't know what compromises - if any - that the modification that was done to the voice coil has impaced the original sound, but what I can say is...

WOW!

I am listening to Sonny Rollins' Saxophone Colossus...the volume knob is on -38 (equating to around 9 o'clock)...and I am getting everything I need...VERY full bass...that typical open, smooth Ohm sound...and I don't even think I've gotten the placement right yet. Simply fabulous.

The 6moons article was right...LeGall has figured out the voice coil issue (he said he experimented with his A's with 5 or 6 placements until he found the one he liked)...if you can find a pair of F's that only needs a refoaming and sound coil/spider work (the cones on my F's are in great shape), what you have to do is BEG him to do the work for you.

I am very happy.
Click to expand...

Are you still using the 919
 
Hyperion said:
The post you have quoted was posted over 10 years ago, and it's author hasn't logged on for nearly 5 years, so I doubt you will get a response. :)
Click to expand...
I'm BACK...

Still using the 919 and F's. They are the only things right now that are still OK in my rig, tho. I have 3 issues:

1) My Nak 580M has been on the shelf for a WHILE (it needs a lot of work);
2) My Tube Research Lab-modified (RIP Paul Weitzel) Marantz SA8001 has stopped outputting sound (the disc/laser seems OK):
3) My Music Hall MMF-7 needs to have the cueing arm adjusted (it doesn't work in the runout groove)

I just semi-retired, so I am driving to Music Technology in Springfield VA to work on all three. Gotta get the rig back in fighting trim. At this point, the only things that DO work are the AU-919 (thanks,
EW - wherever you are), and the F's (oh, and the TU-919).

Peace.
 
bebopdeluxe said:
I'm BACK...

Still using the 919 and F's. They are the only things right now that are still OK in my rig, tho. I have 3 issues:

1) My Nak 580M has been on the shelf for a WHILE (it needs a lot of work);
2) My Tube Research Lab-modified (RIP Paul Weitzel) Marantz SA8001 has stopped outputting sound (the disc/laser seems OK):
3) My Music Hall MMF-7 needs to have the cueing arm adjusted (it doesn't work in the runout groove)

I just semi-retired, so I am driving to Music Technology in Springfield VA to work on all three. Gotta get the rig back in fighting trim. At this point, the only things that DO work are the AU-919 (thanks,
EW - wherever you are), and the F's (oh, and the TU-919).

Peace.
Click to expand...
Good to hear your F's can be driven by the 919's. I looked at the specs of the 919 and the minimum speaker impedance is 8 ohms. The F's are 4 ohms. Just be careful and not overdrive the amp into half the impedance it was recommended for.
 
My 919 gets warm with 4 ohm bookshelves When driven for extended periods but to be fair there is a ton of electronic components packed into a little space.
 
7830BC17-B9D2-4414-B2BC-419C2D171778.jpeg

I’m coming in late to this thread. I have owned Ohm F’s twice - the first set I blew up so many times I finally traded them in for Walsh IV’s for less than the repair cost for the F’s.

Fast forward 30 years and I found another cherry pair in need of restoration. Off they went to Bill Legall. New spiders, new surrounds, new voice coils, new inside cone treatments and voilà - they sound better than I remember the original sounding in every way! I re-wirded the cabinets and got rid of all the cheesy banana plugs and the ineffective fuses.

They are way more efficient now. Microdynamics are way better.

I am driving them to realistic levels with a McIntosh MC 275V. 75 wpc rated, 90 wpc measured.

I met with Bill personally to go over the restoration options. He indicated that the ferrofluid Ohm used migrated out of the gap into the joint between the voice coil and titanium cone, causing the adhesive to fail over time.

I feel privileged to own a pair.
 
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As you should feel privileged. You might consider putting a subsonic filter in line of your preamp or adding a small subwoofer to remove low frequency's from Ohms to prevent beer can crush!!
 
Thanks! I think the output transformers in the MC 275 and natural rolloff in the preamp will do the trick.

Another nice benefit of the MC 275 is there is no possibility of DC on the outputs. That was responsible for at least one of the F rebuilds.
 
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My BA-F1 has enough juice to power infinity kappa 8s to respectable levels. About the same amp as the 919. But somewhat better using two Ba-f1 amps powering the woofers and a modified st-70 to power the mids/highs.
 

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