JohnW

Problem solved. https://www.amazon.com/gp/product/B000K50HJE/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

Sorry, I only made it in about 80 pages. You know, life intrudes.

I’m trying to identify the possible cause of the hum, given that one day there was none, and the following day, there was. What commonly produces that sort of problem, Short of a change in devices in my house, of which there are none. Everything is plugged into a Belkin Pure AV PF-60 power conditioner. And that’s the real head scratcher.

No, I attached a ground lifter to the AC plug. Not entirely crazy about that.

No, the ground lifter got rid of it.

Literally nothing.

Yes, but...one day without hum. I changed nothing in the system.

Thank you much.

Now here’s interesting issue I can’t figure out. I bought a never-used, still in the box, original Hsu Research VTF-2 Mk 1. I’d used one for fifteen years and loved it. Picked this one up for $100. It even still smelled new. Anyway, plugged it in, everything was kosher. Until today. Turned on my receiver, which activated the sub, and there was a hum coming from it. Turned the receiver off, sub remained on, And kept humming. Unplugged the rca cable (connecting the sub to the receiver), hum stopped. Tried a different rca cable, still had a hum. Tried a different three-prong power cable, still had a hum. Hmmm... Tried a ground lifter. Hum gone. I’ve heard using a ground lifter Is a bad idea...but the previous sub used a two prong power cable.... Loose ground cable in the sub amp? Welcome to the boundaries of my knowledge. Theories? Ideas?

So how did you 3.2s sound with the titanium tweeters?

Sitting here listening, this soundstage is CRAZY. Hey he improvement is quite noticeable. Maybe a 15-20% increase in clarity in all three drivers, deeper, wider soundstage...not fatiguing or distorted... Now here’s the thing: I actually ordered a uF meter to see if I NEEDED to replace the original caps, but it hadn’t arrived on time, so I just went ahead and replaced them, thinking I could re-install if necessary. Well the meter arrived today and I tested them, none of them were more tha 1uF out of spec. So HOW IS IT that they sound SO MUCH better?

Just did it. Tighter, clearer, more defined soundstage. Now I have to spend all night re-tweaking everything. Gosh darn it.

I’m drooling over a few integrated amps with home theater bypass...but I can’t seem to figure out how everything is connected. Front speakers to integrated amp, with AVR frint preouts feeding that?

I’m wondering the EXACT SAME THING. Have an Onkyo tx-nr676 running my new Cornwalls and my family room theater, which actually sounds really good. But would say, a Marantz SR6015 sound better?

All I have is a multimeter. Guess I'll get out the soldering iron.