Sevenfeet
My UFW-12 has been part of my rig for about a decade but recently I'd been having some ground hum issues and so I had turned it off since I hadn't had time to test out the problem.  Well this week I bought a new Marantz AV7703 pre-amp so I decided to rewire my home theater rig to eliminate a lot of old cruft wiring and see what I can do about the sub.

Unfortunately, I'm come to realize that the UFW-12's amp is likely blown.  It's nice and quiet (save a little transformer hum) but apply any input to the LFE or left/right ports end up with a very loud buzz from the driver.  The power light usually turns red to a fault mode and i have to shut down the amp.  Nothing i tried in terms of electric power, swapping sub cables or using a different receiver made any difference.

Since kevin repaired the sub's amp a while ago (and did some upgrades), I'm thinking it's probably not in my best interest to have it repaired again unless he or Mark can think of something easy.  I was wanting to eventually replace this sub in my home theater rig and place it in my two channel rig in my living room.  Now, it just looks like it'll be scrap.

*sigh*
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Mark_Seaton
Sevenfeet wrote:
My UFW-12 has been part of my rig for about a decade but recently I'd been having some ground hum issues and so I had turned it off since I hadn't had time to test out the problem.  Well this week I bought a new Marantz AV7703 pre-amp so I decided to rewire my home theater rig to eliminate a lot of old cruft wiring and see what I can do about the sub.

Unfortunately, I'm come to realize that the UFW-12's amp is likely blown.  It's nice and quiet (save a little transformer hum) but apply any input to the LFE or left/right ports end up with a very loud buzz from the driver.  The power light usually turns red to a fault mode and i have to shut down the amp.  Nothing i tried in terms of electric power, swapping sub cables or using a different receiver made any difference.

Since kevin repaired the sub's amp a while ago (and did some upgrades), I'm thinking it's probably not in my best interest to have it repaired again unless he or Mark can think of something easy.  I was wanting to eventually replace this sub in my home theater rig and place it in my two channel rig in my living room.  Now, it just looks like it'll be scrap.

*sigh*


I believe Kevin could replace the amplifier with a brand new one modified appropriately for $450-500 delivered.  This would be a direct drop in.
Mark Seaton
Seaton Sound, Inc.
sales@seatonsound.net
773-290-8436
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Sevenfeet
Mark_Seaton wrote:


I believe Kevin could replace the amplifier with a brand new one modified appropriately for $450-500 delivered.  This would be a direct drop in.


It's tempting.  The problem is how much extra money should I put in this anyway especially since this is the second potential repair.  The UFW-12 was always kind of an underperformer and you guys gave done a great job squeezing every last bit of potential out of it.  It's main feature was that it looked great and had a nice signature for music.  It was never the best "shake the walls" sub for home theater use which is what it's been doing in my rig for the last decade.  The MFW was created more for a proper home theater application.

Given that, maybe I should look to find something that goes a bit lower and louder than this design.
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Mark_Seaton
Sevenfeet wrote:


It's tempting.  The problem is how much extra money should I put in this anyway especially since this is the second potential repair.  The UFW-12 was always kind of an underperformer and you guys gave done a great job squeezing every last bit of potential out of it.  It's main feature was that it looked great and had a nice signature for music.  It was never the best "shake the walls" sub for home theater use which is what it's been doing in my rig for the last decade.  The MFW was created more for a proper home theater application.

Given that, maybe I should look to find something that goes a bit lower and louder than this design.


With the updated amp it is a solid performer, but a bit large for the performance delivered, as you can only get so much from a sealed 12".

If you don't mind some minor veneer quirks or blemishes, we have some crazy good deals on the remaining MFW-15 Turbo-SS units.  These sound better and have easily double the playback capability as the original MFW-15.  It would make for a significant upgrade from the UFW-12 you have.

While we do not offer gloss black, if aesthetic is a higher priority, you can take a look at a SubMersive HP or F2 in various finishes, or we even have a rosenut F18 in stock ($2295 black, $2595 rosenut).  I just received one of our previous generation, 2400W HP/F2 amps in stock from an upgrade which are available for $1795 or $1995 each respectively in black maple.  This would be the pre-owned amplifier loaded in a brand new cabinet (premium finishes available too).  Shoot us an e-mail or give us a call if any of these sound interesting.
Mark Seaton
Seaton Sound, Inc.
sales@seatonsound.net
773-290-8436
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Sevenfeet
Ugh!  He tempts me!  And right before Christmas! [smile]

The MFW-15 Turbo SS is a good deal for the price and comes with a balanced connection (useful for the new Marantz AV7703 I just got).  The main aesthetic issue is that the wood finish isn't the rosewood/rosenut that matches my aging AV123 RS750 speakers or other furniture in the room.

The F18 can be had in either black or rosenut which works but I'm paying more than double for the privilege.  I think both Seaton subs will fit the space in question (the UFW-12 is an approximately 21" square cube)

It all sounds interesting.  Whether I can convince my wife to spend more money we don't have is another matter, especially when the TV next to the old sub is older than the UFW-12 and I would describe it in "hospice care" right now.
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Stereodude
Doesn't Kevin still offer the Big Block Kit upgrade for the UFW-12?  That replaces the driver with a 15" one.
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Sevenfeet
Hey Stereodude.  It's been a while. [smile]

I've never heard of swapping out the actual driver with a bigger one.  There was swapping out the driver with a better, same sized one at one point...an upgrade that dated back to the final days of AV123.

Kevin did upgrade the amp that's in it when the original one failed back in early 2015.  And even though I know they can still likely fix this thing, I'm thinking I'm putting too much money into it when i can spend a little more money and get something better either from Seaton Sound or another vendor.

One thing for sure is that I can't do the new sub right this second.  My wife wants to spend money on landscaping the house and I'm going to lose this one (especially since she allowed me to get a new Marantz AV7703 pre/pro last month).
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Stereodude
Sevenfeet wrote:
Hey Stereodude.  It's been a while. [smile]

I've never heard of swapping out the actual driver with a bigger one.  There was swapping out the driver with a better, same sized one at one point...an upgrade that dated back to the final days of AV123.

Hey my vertically challenged [wink] friend. Yes, it's been a while.

I have two UFW-12 subs with 15" drivers in them.  They're definitely real.  I don't know if he still offers that upgrade or how exactly it works if you're not local.  I'm local to him, so he picked 'em up and returned them with the 15" driver in the box.  I know the hole needs to be routed out bigger to accommodate the bigger woofer, so it's not exactly plug and play.  I seem to recall he would loan/ship a template and the router bit to non-local folks.

Quote:
Kevin did upgrade the amp that's in it when the original one failed back in early 2015.  And even though I know they can still likely fix this thing, I'm thinking I'm putting too much money into it when i can spend a little more money and get something better either from Seaton Sound or another vendor.

Kevin repaired one of my amps also.  I thought it had died again, but it seems to be working fine for many months now after it sat unused for a while.  The UFW's have long been out of use in my primary viewing system.  I've been through two DIY creations in the mean time.  One UFW now resides in my bedroom and does 2 channel duty.  The other is collecting dust.  I'm thinking to stack it on top of the first in my bedroom though.

If you want something that matches the finish of your Rockets exactly there aren't many options.  The UFW-12 with the 15" driver upgrade and the tweaked amp is a pretty solid sub even for moderate HT duty.  Of course I understand the reluctance to keep "investing" more money into your existing subwoofer.
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Sevenfeet
Stereodude wrote:

Hey my vertically challenged [wink] friend. Yes, it's been a while.

I have two UFW-12 subs with 15" drivers in them.  They're definitely real.  I don't know if he still offers that upgrade or how exactly it works if you're not local.  I'm local to him, so he picked 'em up and returned them with the 15" driver in the box.  I know the hole needs to be routed out bigger to accommodate the bigger woofer, so it's not exactly plug and play.  I seem to recall he would loan/ship a template and the router bit to non-local folks.


Yeah I was looking at the front of my UFW-12 and carving out a bigger hole would require some interesting woodworking.  And being in Tennessee, that's not a real option getting it back to Michigan.

Quote:

Kevin repaired one of my amps also.  I thought it had died again, but it seems to be working fine for many months now after it sat unused for a while.  The UFW's have long been out of use in my primary viewing system.  I've been through two DIY creations in the mean time.  One UFW now resides in my bedroom and does 2 channel duty.  The other is collecting dust.  I'm thinking to stack it on top of the first in my bedroom though.

If you want something that matches the finish of your Rockets exactly there aren't many options.  The UFW-12 with the 15" driver upgrade and the tweaked amp is a pretty solid sub even for moderate HT duty.  Of course I understand the reluctance to keep "investing" more money into your existing subwoofer.


Mine had gone wonky in the recent months and had a hum at the driver that was hard to get rid of.  So I mostly kept it off unless I really wanted to have it on, which means it was off for most of the time.  Sometime before I got the Marantz, I noticed that the hum had gotten extremely loud (like 80+ dBs) and lots of testing between the new Marantz and an older Denon receiver I had didn't solve the problem (the power light on the back would quickly go red to a fault state).  So it's likely something blown on the amp and while I'm decent with a soldering iron, I'm not really qualified to fix this myself.  I may pull the amp anyway to see if it's something obvious.

The Rosenut cabinet on the F18+ looks close enough to my RS750s but at this point, black goes with everything and I expect whatever the next sub is will be black.  The MFW-15 cabinet looks more like the oak cabinets AV123 was doing at one point.  It really wouldn't match anything in my home theater room, speakers or otherwise.
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Mark_Seaton
Sevenfeet wrote:


Yeah I was looking at the front of my UFW-12 and carving out a bigger hole would require some interesting woodworking.  And being in Tennessee, that's not a real option getting it back to Michigan.


Mine had gone wonky in the recent months and had a hum at the driver that was hard to get rid of.  So I mostly kept it off unless I really wanted to have it on, which means it was off for most of the time.  Sometime before I got the Marantz, I noticed that the hum had gotten extremely loud (like 80+ dBs) and lots of testing between the new Marantz and an older Denon receiver I had didn't solve the problem (the power light on the back would quickly go red to a fault state).  So it's likely something blown on the amp and while I'm decent with a soldering iron, I'm not really qualified to fix this myself.  I may pull the amp anyway to see if it's something obvious.

The Rosenut cabinet on the F18+ looks close enough to my RS750s but at this point, black goes with everything and I expect whatever the next sub is will be black.  The MFW-15 cabinet looks more like the oak cabinets AV123 was doing at one point.  It really wouldn't match anything in my home theater room, speakers or otherwise.


If the finish matters, black or Rosenut is the way to go.  The F18+ in black maple or rosenut isn't all that much bigger, is a little shallower, and will blow the doors off your UFW-12 with the option of adding 1-3 more in the future without having to ship or sell anything.  You can also have them before the Christmas holiday weekend. [cool]
Mark Seaton
Seaton Sound, Inc.
sales@seatonsound.net
773-290-8436
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Stereodude
Mark_Seaton wrote:
If the finish matters, black or Rosenut is the way to go.  The F18+ in black maple or rosenut isn't all that much bigger, is a little shallower, and will blow the doors off your UFW-12 with the option of adding 1-3 more in the future without having to ship or sell anything.  You can also have them before the Christmas holiday weekend. [cool]

Look at that veteran sales pitch.  I'm not sure Sevenfeet will be able to resist.  His wife better take away the plastic.
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