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Post by 405x5 on Oct 22, 2018 20:20:00 GMT -5
Try a ground loop isolator before you spend a bunch of money. You might be surprised. Not a ground loop the amp. Went south. Bill |
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Post by leonski on Oct 26, 2018 14:30:29 GMT -5
Smoke and flames south or just 'not working'?
If you are at all curious, unplug the sub in question and let is sit for an hour or so.
Unbolt plate amp from back. Take notes of any and all connection, color code and where they plug in.
Put amp on the kitchen table and look for obviously burned parts. Use your NOSE, too. Note any bulged capacitors. The big 'lyritics is where I'd start.
In the meantime? Call / Write / email whoever built the sub and see if they'll part with a schematic. That's ONE reason the tech probably was reluctant to tackle this job.
No sketch-O-matic makes troubleshoot more time consuming.
Other problem is that if you fix the 'primary' cause of the hum / buzz, that is no guarantee that something ELSE isn't either already bad or on the Next Flight South.
With Schematic in hand, try the tech again, or another, maybe, and see if they'll do an estimate for fee and deduct THAT cost if you go ahead with the 'Fix'.
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Post by 405x5 on Oct 27, 2018 9:59:23 GMT -5
“Smoke and flames south or just 'not working'? If you are at all curious, unplug the sub in question and let is sit for an hour or so. Unbolt plate amp from back. Take notes of any and all connection, color code and where they plug in. Put amp on the kitchen table and look for obviously burned parts. Use your NOSE, too. Note any bulged capacitors. The big 'lyritics is where I'd start. In the meantime? Call / Write / email whoever built the sub and see if they'll part with a schematic. That's ONE reason the tech probably was reluctant to tackle this job. No sketch-O-matic makes troubleshoot more time consuming. Other problem is that if you fix the 'primary' cause of the hum / buzz, that is no guarantee that something ELSE isn't either already bad or on the Next Flight South. With Schematic in hand, try the tech again, or another, maybe, and see if they'll do an estimate for fee and deduct THAT cost if you go ahead with the 'Fix'. “ Thread dates back to 4/11/2018 safe bet the OP bailed on that sub. Bill |
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Post by leonski on Oct 27, 2018 11:57:34 GMT -5
“Smoke and flames south or just 'not working'? If you are at all curious, unplug the sub in question and let is sit for an hour or so. Unbolt plate amp from back. Take notes of any and all connection, color code and where they plug in. Put amp on the kitchen table and look for obviously burned parts. Use your NOSE, too. Note any bulged capacitors. The big 'lyritics is where I'd start. In the meantime? Call / Write / email whoever built the sub and see if they'll part with a schematic. That's ONE reason the tech probably was reluctant to tackle this job. No sketch-O-matic makes troubleshoot more time consuming. Other problem is that if you fix the 'primary' cause of the hum / buzz, that is no guarantee that something ELSE isn't either already bad or on the Next Flight South. With Schematic in hand, try the tech again, or another, maybe, and see if they'll do an estimate for fee and deduct THAT cost if you go ahead with the 'Fix'. “ Thread dates back to 4/11/2018 safe bet the OP bailed on that sub. Bill Too Bad if he did. I was kind of hoping it was still lurking in a closet somewhere and not donated to a landfill. Even a retrofit with a MiniDSP and a PA-1 amp would work. And be quite foxible, though needing a computer to alter settings. I think the mini will hold 3 sets of data? I hate to see stuff just 'junked out'. I think some cost-free options, like getting the schematic, should have been explored........ Oh! Well! |
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Post by 405x5 on Oct 27, 2018 12:10:11 GMT -5
Too Bad if he did. I was kind of hoping it was still lurking in a closet somewhere and not donated to a landfill. Even a retrofit with a MiniDSP and a PA-1 amp would work. And be quite foxible, though needing a computer to alter settings. I think the mini will hold 3 sets of data? I hate to see stuff just 'junked out'. I think some cost-free options, like getting the schematic, should have been explored........ Oh! Well! I hear you...….the dumpster is my LAST option. Not all are "do it yourselfers" and I got the feel from this it was either pay somebody or dump it, My sub is 17 years young and I'm on my second plate amp., already 8 or 9 years. Bill |
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Post by leonski on Oct 27, 2018 16:53:45 GMT -5
Original plate amp in my HSU Research VTF2 sub......is still alive and well. (fingers crossed)
I'm real reluctant to simply 'toss' something which might yet be salvaged. Even another amp / crossover or purchase an aftermarket 'plate' amp would be on the table. As long as the driver wasn't fried!
Maybe Parts Express? Madisound? have to look?
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Post by The Mad Norseman on Oct 29, 2018 16:26:55 GMT -5
Yup, ground loop not the issue here, repair shop said it was the board inside the amp. Offered to send to to 'a specialist' in IL to fix (for many extra $$$ of course!), but said they couldn't guarantee that would work, "but probably would", so I declined...  I like the idea of using three subs, just get a splitter off of one of the cables feeds? Or,...? |
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Post by leonski on Oct 30, 2018 11:11:58 GMT -5
Mad? or just Angry? Any way to secure a Schematic of the amp in question? Your 'fix it' guy was, IMO, full of it. The way MOST shops do it is to issue an estimate of repair for a fee. That fee is WAIVED should you go ahead with the repair. Plan on maybe 50$ or so for 'look' and than set some (in your mind) upper limit on what you intend to spend for fix. Otherwise? Go to Madisound or Parts Express and pick up a plate amp with the right amount of power. www.parts-express.com/dayton-audio-spa250-250-watt-subwoofer-plate-amplifier--300-803The linked amp is 125$ and may work......maybe not.....But certainly less $$ than junking out what you already have and replacing new. Other, more powerful amps available. |
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Post by The Mad Norseman on Oct 31, 2018 17:22:42 GMT -5
Thanks!, I'll take a look. Mad = Mad as a Hatter in my case, (never angry).  |
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Post by leonski on Nov 1, 2018 12:45:42 GMT -5
Stay away from the Mercury. That's what made 'em 'mad', you know.
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Post by The Mad Norseman on Nov 23, 2018 21:02:12 GMT -5
Okay, thanks to all of you for your helpful suggestions (and I did try most of them, but to no avail!), so tonight I pulled the trigger and ordered a new part of Emotiva Amotiva S12s to replace the two subwoofers I have -now of course they can't arrive soon enough!
I'll post my impressions once everything is integrated into the system and up and running.
As to the old ones:
My daughter wants the good remaining one I have (to augment her modest but growing system), and the other unfortunately is headed for the haz-mat collection site...
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Post by audiobill on Nov 25, 2018 11:13:59 GMT -5
Hard to believe, but a Carver Sunfire sub I once had developed a hum. The cause (well documented on the net) was that the volume control needed tightening to the plate amp.....just fyi.
Fixed and promptly sold.
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Post by 405x5 on Nov 25, 2018 11:53:53 GMT -5
Mine started humming...
I started humming....
Suddenly the room was gloriously filled with two part harmony.
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Post by leonski on Nov 26, 2018 14:24:02 GMT -5
Hard to believe, but a Carver Sunfire sub I once had developed a hum. The cause (well documented on the net) was that the volume control needed tightening to the plate amp.....just fyi. Fixed and promptly sold. Lucky YOU. I've seen posts where people endlessly discuss capacitors and exactly WHICH schematic applies. My impression, false?, is that Sunfire is a little reluctant to part with schematics. Is that true? |
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Post by audiobill on Nov 26, 2018 15:07:33 GMT -5
That's what I heard, too - and never had schematic....
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Post by novisnick on Nov 26, 2018 15:10:25 GMT -5
That's what I heard, too - and never had schematic.... Did you see my question? |
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Post by audiobill on Nov 26, 2018 16:46:32 GMT -5
Yep!!
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Post by The Mad Norseman on Nov 30, 2018 21:12:15 GMT -5
Okay, is UPS delivery REALLY this bad, or is this simply a recent development? My two new Emotiva subwoofers were scheduled for deliver yesterday (11/29) for between 3:45pm and 7:45pm, so I took the afternoon off. They never showed up. Got a new email last night saying they were going to deliver today (11/30) between those same hours...again, they're a 'no-show'!  So,...what the hell is it with incompetent UPS? Emotiva used to use FedEx for their deliveries, but (apparently) no more! Better (cheaper) deal from incompetent UPS? I'm pissed... So what am I supposed to do? Take a THIRD afternoon off waiting for these to be delivered (maybe) on Monday??? And in the meantime they sit on a truck for three days below freezing (different materials expand and contract at different rates in extreme temperatures which can cause problems). NOT a happy camper! Grrrrr... |
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Post by gus4emo on Nov 30, 2018 22:09:09 GMT -5
Okay, is UPS delivery REALLY this bad, or is this simply a recent development? My two new Emotiva subwoofers were scheduled for deliver yesterday (11/29) for between 3:45pm and 7:45pm, so I took the afternoon off. They never showed up. Got a new email last night saying they were going to deliver today (11/30) between those same hours...again, they're a 'no-show'! So,...what the hell is it with incompetent UPS? Emotiva used to use FedEx for their deliveries, but (apparently) no more! Better (cheaper) deal from incompetent UPS? I'm pissed... So what am I supposed to do? Take a THIRD afternoon off waiting for these to be delivered (maybe) on Monday??? And in the meantime they sit on a truck for three days below freezing (different materials expand and contract at different rates in extreme temperatures which can cause problems). NOT a happy camper! Grrrrr... Very weird, I have never had any problems with UPS... |
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Post by The Mad Norseman on Dec 3, 2018 17:44:36 GMT -5
Update time!: UPS failed to deliver my two new subwoofers on last Thursday, then on Wednesday, and then yet again on Saturday, (I'd received emails preceding each with a new deliver day & time - a few hours after each 'no-show'). So after Saturday's fail, I got another email notice saying UPS was going to deliver them on Monday (today), 12/3 between 3:45pm and 7:45pm. Fourth time the charm? Okay, so one (yes, just one of them!) arrives today (on 12/3) - at noon(!). This one was delivered by a UPS guy, but (get this) he's driving a Budget rental truck! Said he didn't have the other one, and "it would probably be delivered later today". He proceeded to unload the subwoofer complaining "that things were better when UPS wouldn't take shipments that exceeded 50LBs!", and carted it up and in my door...  The thing looks like its been shipped back and forth across the country several times, and has a re-taped bottom(!), is filthy as hell, but no serious outward damage. Since its been frozen for four days (in the back of a Budget rental truck?!?) I'll let it gradually achieve room temperature before unpacking. Then the doorbell rings again at 2:30pm, different driver, and this time with a real UPS truck (progress?). He (drops it rather unceremoniously off the back of the truck onto the cart), and wheels in this box which joins the first, now both awaiting unpacking when I have time tomorrow night. This one's not quit as dirty, but there's a couple gouges in the box, and a two slightly smashed corners on this one. But now the two are reunited. I have some trepidation about the condition of the contents of each, but Emotiva's packaging is typically quite protective, so am hoping for the best... (And you'll notice that neither arrived within the delivery window quoted by UPS, so it was only by chance that someone was here to receive them!). |
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