Mark_Seaton
Background:
As most know, I was the designer of AV123's very popular, MFW-15 subwoofer.  As many also know, AV123's push to ever lower prices resulted in component quality issues in the amplifiers beyond the first ~300 units which have performed very well on average.  The amplifier was custom fit to the enclosure to allow the very large, low-tuned port to wrap up the back of the box forming a full C internally while using large round-overs on both ends of the port.  As such the common DIY outlets do not offer amplifiers which can fit in the cabinet.  

With so many failed and thousands sold, I have long wanted to offer a drop-in amplifier to both fit the original cabinet, and to implement many of the refinements I wanted in the original and intended to include if a 2nd generation was ever released.  Over the past few years we have been working with our amplifier OEM, SpeakerPower, based out of Santa Ana, CA, to develop a modern, home audio specific input/control front end.  You can already see this in our new HT series amplifiers for the SubMersive HP+/F2+ and F18+.  Combined with ICEpower's most recently updated amplifier modules, we are able to easily pack greatly improved amplifier performance along with full-featured audio processing, controls and adjustments.  I have made the investment in the custom parts required for the first 100+ amplifiers to allow a drop in, amplifier upgrade, and can now offer them in the 3 forms you see here on our forum.  We have quite a few new old stock MFW-15 cabinets fully loaded as MFW-15 Turbo models.  We also offer a whole-sale Turbo Upgrade for MFW-15 owners to replace the woofer and amplifier for about double the performance with significant improvements in sound quality.  This upgrade will also greatly reduce the likelihood of hearing any foul noises from your MFW-15 if a soundtrack pushes the upper performance limits.

The Details:
Upgrade your original MFW-15 to a 700W (conservatively rated) ICEpower amplifier with custom DSP programming by the original designer of the MFW-15, Mark Seaton.  The new amplifier drops directly into the amplifier opening and offers both increased clean playback levels, lowered distortion and improved sound quality.  The custom-fit amplifier is manufactured for us by the same California based build house as our SubMersive amplifiers, SpeakerPower, and comes with a 3 year warranty while being serviceable long after that time.

Amplifier features:
  • 700W RMS ICEpower amplification
  • XLR/RCA inputs with auto-sensing and 12V trigger
  • LF EQ for room size and house curve adjustment
  • 30-200Hz 24dB/oct crossover
  • 0-20ms delay control for front/rear subs
  • Assembled in USA - all but the ICEpower module is USA sourced
  • Included block off plate for original control panel
  • 3 year warranty with the same shipping policies as for our other products (link)
Pricing for the upgrade is $450 + $15 shipping within lower 48 states.  

Q) How can I order the Mk2 amplifier?


A) Please e-mail us ( sales@seatonsound.net ) to confirm the quantity Mk2 amplifiers you are ordering, your shipping address, and a contact phone number we can provide FedEx so we can send on the appropriate invoice. We have settled on a flat rate shipping of $20 for the amplifiers within the lower 48 states.

We e-mail invoices hosted by PayPal. You can either pay with a PayPal account or if the invoice goes to an e-mail that is not tied to a PayPal account, you can select "pay without logging in" and pay with any major credit card (for any order less than $2000). If those options don't work out for you or you prefer to process are card over the phone, simply give us a call at 773-290-8436 and we can process your credit card over the phone.

Sending us an e-mail with the shipping and contact info is much quicker and more reliable than taking it down over the phone.



[MFW-ICEamp-front]

[MFW-ICEamp-top]

As an added bonus, this is the same amplifier we use in the MFW-15 Turbo Kit.  This means if an owner wants to later upgrade to the Turbo kit, this is possible by shipping the 5 lb amplifier back to us for re-programmed as a Turbo kit amplifier.  There is no cost for the programming, just round trip shipping and the remaining parts for the Turbo kit.  Re-programming of amplifiers must be done by Seaton Sound or another party we authorize, equip, and train to do so.  

3/8/2016 addition:

I finally made some time to pull out some measurements from when I was making the final adjustments to the MFW-15 Mk2 amplifier.  These were in the middle of the warehouse, so not ideal outdoor measurements of a vented sub, but if you excuse a little wiggle in the response, you can see just how smooth the response is now, and the range of options the "LF EQ" knob provides.

First is a snapshot of a few response curves of the MFW-15 Mk2 with the stock driver.  The middle, light blue line is what you get with the LF EQ knob at 12 o'clock.  The graph shows 5dB/division, showing a +/-3dB window with a lower limit of 17Hz and useful extension below 15Hz.  From top to bottom the curves represent the LF EQ knob at approximately 5, 3, 12, 9 and 7 o'clock on the dial (clockwise is higher).  The original MFW had a low end response closer to that of the green curve around 9-10 o'clock on the dial, but not as smooth:

[MFW-15-LF-EQ-2] 

If we zoom in much closer showing only 2dB/division and a much narrower range you can see just how smooth the curves are and the adjustments between the curves.  From full clockwise to full counter-clockwise is about +/-6dB (12dB total adjustment) around 16-18Hz, and less than +/-1dB above 60Hz:
[MFW-15-Mk2-zoom] 

Finally here is a graph showing the fine adjustment available as you turn the knob from min to max where the respective colors remain the same but more increments are filled in through the range:
[MFW-15-LF-EQ-1] 


Q1)  Should I get the MFW Mk2 amp or wait for the complete Turbo Kit?

A)  At this time, I recommend anyone with a working original woofer to upgrade to the Mk2 amplifier and get your system running again while making it perform much better than the original.  The Turbo driver we were selling has surround which was larger than the stock MFW driver.  This means the cover panel hits the outer edge of the surround and required a 1/2" spacer behind the cover panel to fit.  While this functions just fine, it isn't a clean, professional look.  Later this year I will have newly developed turbo woofers available which will fit within the original cover panel.  These woofers will feature a santoprene surround, dish dustcap, low distortion motor and will be US made by one of our very reliable vendors to insure ready availability once finalized.  If you think you may later upgrade your Mk2 amplifier to a Turbo unit just save the packing boxes as they make shipping the 5 lb amplifier very easy and economical.  There will be no charge to reprogram the amplifier for the new Turbo woofer, just the round trip shipping to update the amplifier.

 

Mark Seaton
Seaton Sound, Inc.
sales@seatonsound.net
773-290-8436
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doug067
Wow!! Speechlessly excited!  I have 2 original black cabinets with original amps and drivers (still work). Started getting worried about blowing them with all the amp problems a few others have had. Went to 4-12" rythmiks. Somethings always been missing since I took the mfw's out of service. I also acquired 2 cabinets somewhere from someone? few years back. Going to have to hock a few things and climb on board this deal! Amps looks beautiful and the ability to upgrade to the turbo down the road is just graet. Thanks for keeping all of us mfw-15 owners going after all this time. Awsome subs
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excaluber
That's awesome news Mark. I really appreciate you sticking with this issue.  I have two MFW's, one of which developed the hum.  I'm in the midst of renovating the house and have them packed away but I'm very interested in getting these once we finish the renovations.

Thanks again for sticking with us!
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Geronimo
just got a pair of MFW-15 subs yesterday. sold to me for $300. the first one is good but the other one got a slight humming sound.

I am not an electrician so if i'll upgrade/replace the bad amplifier, what is the level of difficulty in the replacement? could I do it all by myself or should I bring the sub and the new amp to an electrician?

hoping I could do this all by myself as I don't wan't to get it out of the house again. it's a very heavy sub and i'll do this upgrade stealthily (without the wife's approval).

a step by step instruction would be nice if there's any. a youtube video would be awesome.

I just want to replace the amp. thanks!
Marantz AV7702, Emotiva XPA5, Adcom GFA555ii, Polk RTi line, dual AV123 MFW-15
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blake18
Geronimo wrote:
just got a pair of MFW-15 subs yesterday. sold to me for $300. the first one is good but the other one got a slight humming sound.

I am not an electrician so if i'll upgrade/replace the bad amplifier, what is the level of difficulty in the replacement? could I do it all by myself or should I bring the sub and the new amp to an electrician?

hoping I could do this all by myself as I don't wan't to get it out of the house again. it's a very heavy sub and i'll do this upgrade stealthily (without the wife's approval).

a step by step instruction would be nice if there's any. a youtube video would be awesome.

I just want to replace the amp. thanks!


It's very easy to do yourself. No need for an electrician. Very little wiring involved.
"Worrying does not take away tomorrow's troubles, it takes away today's peace"
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Geronimo
thanks blake18. now I'm just saving up for the amp replacement. I might get two amps if budget allows.

we watched will smith's "I Am Legend" again last night and I'm loving it. the two mfw's were positioned at the back of each end of our sofa. we felt the sofa shaking a little on that truck fight scene after his dog died and will smith has gone crazy. haven't felt that with my single bic acoustech pl-200 before.
Marantz AV7702, Emotiva XPA5, Adcom GFA555ii, Polk RTi line, dual AV123 MFW-15
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Mark_Seaton
FAQ:

Q1)  Should I get the MFW Mk2 amp or the complete Turbo Kit?

A)  At this time, I recommend anyone who puts value on the aesthetic look of your MFW-15, especially those with finishes other than satin black, to order the Mk2 amplifier upgrade.  The current Turbo driver has surround which is larger than the stock MFW driver.  This means the cover panel hits the outer edge of the surround and requires a 1/2" spacer behind the cover panel to fit.  While this functions just fine, it isn't as clean a look as I'd prefer.  By this summer I will have turbo woofers available which will fit within the original cover panel.  These woofers will not be any more expensive than the current Turbo woofers.  Here are two pictures of how the cover panel sits over the current woofer with the 1/2" spacers:
[image] 
[image] 
Q2)  How can I order the Mk2 amplifier or Turbo kit?


A)  Please e-mail us to confirm the quantity, your shipping address, and a contact phone number we can provide FedEx so we can send on the appropriate invoice.  We have settled on a flat rate shipping of $20 for the amplifiers and $40 for the woofers within the lower 48 states.  

We e-mail invoices hosted by PayPal.  You can either pay with a PayPal account or if the invoice goes to an e-mail that is not tied to a PayPal account, you can select "pay without logging in" and pay with any major credit card (for orders less than $2000).  If those options don't work out for you or you prefer to process are card over the phone, simply give us a call at 773-290-8436 and Kelly or I can process your credit card over the phone after we have sent an invoice.  

Sending us an e-mail with the shipping and contact info is much quicker and more reliable than taking it down over the phone.

Pricing for the upgrade is $430 + $20 shipping within lower 48 states.

Mark Seaton
Seaton Sound, Inc.
sales@seatonsound.net
773-290-8436
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Geronimo
I have dual MFW-15s. ones running fine and very quiet. the other's got that slight hum. planning to only replace the amp on that sub with the hum. would it make a difference in sound quality running both subs together with only one amp upgraded and both subs still got the same original drivers? both are in moho finish and wife's already got that disapproving stare. still saving up. listed my old bic pl200 at ebay.
Marantz AV7702, Emotiva XPA5, Adcom GFA555ii, Polk RTi line, dual AV123 MFW-15
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Mark_Seaton
Geronimo wrote:
I have dual MFW-15s. ones running fine and very quiet. the other's got that slight hum. planning to only replace the amp on that sub with the hum. would it make a difference in sound quality running both subs together with only one amp upgraded and both subs still got the same original drivers? both are in moho finish and wife's already got that disapproving stare. still saving up. listed my old bic pl200 at ebay.


Sounds like selling the bic is a good move as that reduces excess boxes in the home, where the amp upgrade modernizes the cabinets already in place.  The new amp comes with a 3 year warranty and is serviceable long beyond that time.  This summer we'll have a turbo woofer with a surround that fits cleanly within the original cover panel.  I'm not committing to price yet, but I can commit to it not being any more than the current Turbo woofer.
Mark Seaton
Seaton Sound, Inc.
sales@seatonsound.net
773-290-8436
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Geronimo
Thanks Mark. I'm gonna give you guys a call one of these days when I'm ready to pull the trigger. Talking about supply and demand, would these MFW15 amps and turbo woofer upgrades be available in the next two years? I would love to get all the upgrades but I just recently bought the Marantz 7702 processor and a new 4runner SUV. wife said my HT spending budget is at the limit. =(
Marantz AV7702, Emotiva XPA5, Adcom GFA555ii, Polk RTi line, dual AV123 MFW-15
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Mark_Seaton
Geronimo wrote:
Thanks Mark. I'm gonna give you guys a call one of these days when I'm ready to pull the trigger. Talking about supply and demand, would these MFW15 amps and turbo woofer upgrades be available in the next two years? I would love to get all the upgrades but I just recently bought the Marantz 7702 processor and a new 4runner SUV. wife said my HT spending budget is at the limit. =(


I believe it's very possible we'll be able to service and offer these for quite a few years.  Long term the only issue comes down to what we can sell them for as we have to order quite a bit of metalwork such that we need to sell through 20-30 units before we break even on the up front costs.  Fortunately there are quite a few MFW-15s out there making it more likely demand will continue over time.  Again, for your situation I would start with amps.  You can upgrade the woofers any time down the road.
Mark Seaton
Seaton Sound, Inc.
sales@seatonsound.net
773-290-8436
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Geronimo
Thanks for the advice and assurance Mark. and what an immediate response! thumbs up for this guy! [thumb]
Marantz AV7702, Emotiva XPA5, Adcom GFA555ii, Polk RTi line, dual AV123 MFW-15
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hectic1
Hey Mark...long time no talk!

I'm so happy I found this thread as I have 3 MFW15's in my theater and 2 of the 3 are humming...the only positive for me is that my LS6's do pretty well on the low end so I've been able to get by with 1 sub right now.

Do you have any FR curves on what doing the amp upgrade does to the output?

Thanks and I'll be reaching out soon for an upgrade!

Bob
Bob
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Mark_Seaton
All MFW-15 Mk2 upgrades ordered thus far are shipping out tomorrow and Thursday.  We have a good number in stock so orders will go out quickly after the back orders.  MFW-15 Turbo kits will be close behind.
Mark Seaton
Seaton Sound, Inc.
sales@seatonsound.net
773-290-8436
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Geronimo
I got the fedex tracking number. so excited!
Marantz AV7702, Emotiva XPA5, Adcom GFA555ii, Polk RTi line, dual AV123 MFW-15
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Mark_Seaton
ALL of the single amplifier orders shipped out late yesterday.  ALL of the orders of 2 amps and orders that came in yesterday and today will be shipping out this afternoon.

I think all of you will be quite happy with the improvement and the robustness of the new amp with the stock driver as we have them set up.  There is definitely a big improvement in sound quality and low frequency headroom while being much more tolerant to pushing the volume.
Mark Seaton
Seaton Sound, Inc.
sales@seatonsound.net
773-290-8436
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hectic1
Stop posting stuff like this Mark!
Bob
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Geronimo
Mark, thanks a lot for the amplifier upgrade. it was an easy installation. a little bit hard on the removal of the old amplifier, but everything was a success! no more humming.
Marantz AV7702, Emotiva XPA5, Adcom GFA555ii, Polk RTi line, dual AV123 MFW-15
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Mark_Seaton
Hi All,

Good to hear guys are getting the amplifiers installed without too many issues.  We took the time to put the gasket on the amplifier plates and include the better suited screws for use in MDF.  The hardest part of the process is removing the original amplifier. The originals used torx head screws which should be size T15. Remove and throw away the old screws, we have included new screws that are much better for use in MDF.  The original amplifiers were a very tight fit in the cabinet. Many have had luck using wires through to binding posts as a way to grab and pull the amplifier from the cabinet.   The only tool required to install the amplifier is a power screwdriver with a Philips #2 drive bit.  

For most the electrical connection will be very simple matter of matching the red to red wire and black to black with the bullet-style connectors.  There is a ribbon-style cable which unplugs from the original amplifier which connected to the upper control panel.  You can either leave this cable in place or cut the connectors from one end and pull it through from the other side.

Connection:  Please check the small silver toggle switch is pointing at the connection you are using being the RCA or XLR connectors.  It may function if not set correctly, but you can get noise or improper auto-sensing.

RCA inputs are summed together.  Only 1 of the 2 need be connected in a surround system.  Either input works the same.

XLR connections are female input and male "looping output" which serves as a simple Y connector inside your amplifier.  RCA Y-connectors are easy to find and inexpensive, XLR's not so much.  This allows you to route the subwoofer signal into one sub and pass it on to another or on to shakers or the like.  The looping output is a direct connection to the signal coming in with no electronics between (like a Y connector).

For knob function:

1) Level: Start position: 12 o'clock.  This knob is intended to help match the level of your subwoofer to your speakers.  This should be used as a coarse adjustment to get adjusted to your system and room, with the individual channel levels in the surround processor making the fine adjustments.  Start at 12 o'clock and adjust accordingly, preferably with an SPL meter or microphone like the MiniDSP UMIK-1 (which we stock and sell for $75).  *THERE IS NO CORRECT LEVEL SETTING*  There is only a correct setting for your system and preference.  As I like to say, if there was a single correct setting, I'd get rid of the knob and set it there. [thumb]

2) LF EQ:  Start position 12 o'clock.  This is similar to the LF Adjust knob on our SubMersive and F18 models.  I will post up the range of adjustment it provides, but this is a shelf filter which raises and lowers the lowest frequencies with very little change above 50Hz.  This has a few potential uses depending on the room, system adjustments and listener preferences.  Potential uses and adjustments:
  • Adjustment for smaller vs larger rooms that boost the 15-30Hz range less or more.  MAX (full clockwise) is roughly a +8dB change at 15Hz, MIN (full counter-clockwise) is -8dB change at 15Hz.  For those who found the original balance of the MFW-15 to have more punch than the updated model (which is flatter in response), turn this knob down to 9 o'clock on the dial.
  • Post room correction flavoring.  Start with the knob at 9 o'clock to 12 o'clock before running Audyssey, Dirac, etc.  After room correction has smoothed the response, you can adjust this in the clockwise direction to taste for more whallop and weight vs. turning it down while increasing the subwoofer level to get more punch and attack.
3) Crossover.  Start position full clockwise for use with surround processor.  4th order low pass crossover which goes to effective bypass mode when the knob is full clockwise (maximum).  This crossover can be adjusted all the way down to 30Hz when used with a stereo system.

4)  Delay.  Leave at minumum or full counter-clockwise.  This is intended for use with multiple subwoofers at front-rear locations in the room and is best used while watching the subwoofer's frequency response interaction with other subwoofers and speakers in the room.  Without a microphone like the MiniDSP UMIK-1 (which we stock and sell for $75), you're mostly guessing to set this.

12V trigger uses a mini-plug and can be connected to the 12V triggers on most receivers and preamplifiers.  This is the ideal method of remote turn-on/off as it eliminates the chance of the subwoofer turning off during low level listening.  You can easily connect 2 subwoofers per 12V trigger output of a receiver, possibly more.
Mark Seaton
Seaton Sound, Inc.
sales@seatonsound.net
773-290-8436
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Geronimo
[thumb] where's that like button in here? like like like!!!!
Marantz AV7702, Emotiva XPA5, Adcom GFA555ii, Polk RTi line, dual AV123 MFW-15
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Mark_Seaton
hectic1 wrote:
Hey Mark...long time no talk!

I'm so happy I found this thread as I have 3 MFW15's in my theater and 2 of the 3 are humming...the only positive for me is that my LS6's do pretty well on the low end so I've been able to get by with 1 sub right now.

Do you have any FR curves on what doing the amp upgrade does to the output?

Thanks and I'll be reaching out soon for an upgrade!

Bob


Hi Bob,

We'll have to find a time to connect in the near future and get your 3 subs up and running.

I finally made some time to pull out some measurements from when I was making the final adjustments to the MFW-15 Mk2 amplifier.  These were in the middle of the warehouse, so not ideal outdoor measurements of a vented sub, but if you excuse a little wiggle in the response, you can see just how smooth the response is now, and the range of options the "LF EQ" knob provides.

First is a snapshot of a few response curves of the MFW-15 Mk2 with the stock driver.  The middle, light blue line is what you get with the LF EQ knob at 12 o'clock.  The graph shows 5dB/division, showing a +/-3dB window with a lower limit of 17Hz and useful extension below 15Hz.  From top to bottom the curves represent the LF EQ knob at approximately 5, 3, 12, 9 and 7 o'clock on the dial (clockwise is higher).  The original MFW had a low end response closer to that of the green curve around 9-10 o'clock on the dial, but not as smooth:

[MFW-15-LF-EQ-2]

If we zoom in much closer showing only 2dB/division and a much narrower range you can see just how smooth the curves are and the adjustments between the curves.  From full clockwise to full counter-clockwise is about +/-6dB (12dB total adjustment) around 16-18Hz, and less than +/-1dB above 60Hz:
[MFW-15-Mk2-zoom]

Finally here is a graph showing the fine adjustment available as you turn the knob from min to max where the respective colors remain the same but more increments are filled in through the range:
[MFW-15-LF-EQ-1]   
 
Mark Seaton
Seaton Sound, Inc.
sales@seatonsound.net
773-290-8436
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XBR11

You say that these graphs are taken with the "stock driver".  You are referring to the new amplifier (and not the original one) aren't you?

And for those of us (like me) that don't quite yet understand these graphs, could you please tell in words what they mean?  I don't doubt these are good graphs, I just can't put into words what they are meaning (to me).  Like the red 5 o'clock line - that looks ideal because it has the highest dB, but maybe I am missing something.

 

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theJman

It essentially means the response is insanely good.

In theory you want a frequency response 'curve' to not have any curves or undulations (bumps or dips) at all, but instead be flat until you get around the point where the response starts to fade away. That's what you see as the slow arc downward and is entirely expected. A flat initial response is associated to how true the sound is being reproduced, and essential means the subwoofer is not coloring the output in any audible manner. Your room will definitely make that response change, but that's inevitable and will happen to everyone. What you want to avoid though is a subwoofer that adds it's own 'character' before the interaction with the room even begins.

This is an over-simplification really, and just briefly touches on the topic, but hopefully it gives you some indication of what you're seeing relative to this particular unit.

Jim
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Mark_Seaton
XBR11 wrote:

You say that these graphs are taken with the "stock driver".  You are referring to the new amplifier (and not the original one) aren't you?

And for those of us (like me) that don't quite yet understand these graphs, could you please tell in words what they mean?  I don't doubt these are good graphs, I just can't put into words what they are meaning (to me).  Like the red 5 o'clock line - that looks ideal because it has the highest dB, but maybe I am missing something.



This is where things get easily confused between outdoor/free-field frequency response, maximum output vs frequency, and in-room frequency response.

Let's start with the most important bit.  Just as room-EQ or Audyssey can't make your subwoofer more or less powerful, the curves shown don't change the capability of the subwoofer.  These curves just represent how the response can be shaped and adjusted to get the sound you are after in your room.  For each frequency there is an approximate maximum threshold the amplifier can push the subwoofer to.  The LF EQ knob adjusts what the frequency response is at any point under than threshold; before you "run out of gas."  These response curves allow you to better fit and voice the sub to your room and preferences, akin to making subtle tone and character changes.

The shape of the curve is very slightly different, but this graph shows the DIFFERENCE between the various curves as we use in the SubMersive HP+/F2+.  This is another way to look at the adjustment where you can first run your room EQ system such as Audyssey, ARC or Dirac, and then adjust the LF EQ knob and absolute volume to do the final seasoning to taste:

[LF-EQ-relative-zoom]   

Getting back to the individual responses I posted previously, the top 5 o'clock line would likely be a nice curve to listen to AT YOUR SEAT.  If you used the MFW in your backyard for an outdoor movie setting, you would probably want to start with one of the upper 1/2 of curves shown.  Of course the majority of us are using these in a modest size listening room where we mean smaller than a ballroom or auditorium.

Most rooms have a 7-10' ceiling height and a width of 12-24' which will begin to ramp up the output below ~25-50Hz, and other confined dimensions in the room less than ~35' will cause additional gain in the response at lower frequencies still above the low operating range of the subwoofer.  In short, many modest room sizes can take the general shape of the green curve and result in something closer to that of the red curve!  

Unfortunately the end result is a lot more complicated than this simple gain function, where the subwoofer's location, your seating location and relative dimensions of the room will all impose a series of peaks and valleys on top of this general trend of the response.

This reality does not make the frequency response of the subwoofer irrelevant.  The outdoor response of the subwoofer and the average gain of the room play a huge part in what would best be described as the power response we hear as we walk around the room and the overall, relative balance of the frequencies in the room.  While a narrow peak or dip of 3-6dB will be less audible other than on just the right track to highlight the difference, an overall tilt to the 10-100Hz subwoofer range can be immediately audible.  The difference between the Program 1 & 2 in our past generation SubMersive was readily audible to all despite being a modest tilt with little change above 50-60Hz and a maximum ~3.5dB in the 20Hz range.  This tilt was also by design, a very nice contour to apply to the result of an Audyssey calibration which might sound a little lean and lacking the fun factor many are after in their home theater.  Now we have a knob with 11 selections rather than a button to choose between 2.

Mark Seaton
Seaton Sound, Inc.
sales@seatonsound.net
773-290-8436
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elderblaze
I'd like to purchase the MKII amp for my MFW-15, I sent an email last monday but never got a response.
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