Elac Debut S10 Subwoofer ModElac  Debut S10 Subwoofer Mod Modifications to Elac Subwoofers and other brandsSALE PRICE!!! : The unmodified subwoofer is now selling on Amazon for a limited time at $179. Grab it while you can! NOTE: This auction is for the MODIFICATION of an Elac Debut S10 Subwoofer,...249.00

Elac Debut S10 Subwoofer Mod Modifications to Elac Subwoofers and other brands [Expired]

no longer for sale

SALE PRICE!!! :   The unmodified subwoofer is now selling on Amazon for a limited time at $179. Grab it while you can! 
NOTE: This auction is for the MODIFICATION of an Elac Debut S10 Subwoofer, which includes free shipping and handling in the continental USA back to you once the modification is complete. It does NOT include the unmodified purchase price of the Elac Debut S10 Subwoofer. This subwoofer often sells unmodified for $249. You may send your subwoofer to us to modify and have it shipped back to you once it is modified. Or you may have us purchase and modify the unit for you.   

The TOTAL PRICE of a modified Elac Debut S10 Subwoofer is currently $179 (sale price, may change depending on  Amazon price) for the unit and an additional $249 for the modification itself. Total: $428 for a Modified Elac Debut S10 Subwoofer. 

In the words of The Absolute Sound’s Robert Harley, Stereo Dave's Audio Alternative is a “small, but passionate” (TAS #229, Feb 2007) audio company in Gresham, OR (near Portland). We make our own custom-made, crossoverless single-driver speakers (that really work), subwoofers, interconnects, and speaker cables. We have also been modifying audio components of different makes and models for more than a decade, which improve the sound performance of the unit substantially.

We have been searching for more subwoofers that we could recommend to customers for modification that would have excellent bass performance in both movies and music; particularly larger subwoofers. Many subwoofers, in our experience are slow, muddy and are not quite deep and defined enough to be natural sounding and powerful. The Elac Debut S10 is a rare exception to many of today's subwoofers currently available, especially given the price.  

Before Modification: The bass produced by the unmodified Debut S10 out of the box was quite good. It was full, surprisingly deep, and spacious for a 10 inch subwoofer. Being downward firing, this added extra depth and accuracy to the unit. To our ears, it was decently textured, and fairly low, and had plenty of pop for a 10 inch subwoofer. But it lacked some depth, was a bit "boomy" and  less detailed that we would like in over all presentation. The bass was also a bit one dimensional . But overall, it was a very good sounding subwoofer stock, one of the better ones we have heard prior to modification. Since moving to Elac from Pioneer, Andrew Jones has designed a noticeably better subwoofer. This makes us curious to hear the other subwoofers he has designed further up the line for this company; The S10EQ and the S12EQ, which retail for $499 and $699 respectively.

After Modification:  The bass tone became more nuanced and improved considerably in depth and texture. No longer did you feel like it was a "one note bass" sound, but it had natural sounding under tones and over tones, and sounded much more life-like. The sound stage became much bigger, and the instruments themselves were much larger, richer, rounder and far better located. The over all detail of the unit improved as well as transient response. The amount of lower bass itself increased, while at the same time it was a lot more precise, powerful and dynamic. The bass also became deeper as well and gained definition, crunch and texture considerably on both movies and movies. Gone was the "boomy" sound heard earlier. It became much more pin point and tight. 

About the Modification: We have developed a proprietary modification over the past 12 yrs that utilizes, among other modification methods, a field modification similar to what is explained by Shakti, which is often paraphrased by Absolute Sound as, "We don't know how they work, but work they do." Much of the work that we do on machines involves optimization of the signal flow in the power supply and other signal paths in the machine. Utilizing these particular modifying principles and methods, which have been researching and improving over the last 12 yrs, we are able to modify units and speakers to increase in bandwidth (frequency range), improve in transient response, with increased clarity, tonal accuracy, depth and texture. Those who have bought our products and modifications have written us and have frequency expressed their surprise at the improvement of sound performance and how much more sound they heard compared to prior to modification. We have many repeat customers who know how much the sound has improved from our modification based on their experience over the past years with us.  
The TOTAL PRICE of a modified Elac Debut S10 Subwoofer is currently $179  for the unit and an additional $249 for the modification itself. Total: $428 for a Modified Elac Debut S10 Subwoofer


We also modify most makes and models of receivers, players and other pieces. Inquire upon a specific model and pricing. We can also modify such subwoofer brands as Velodyne, JL Audio, REL, and others. We also modify Rotel, Harman Kardon, Pioneer Elite, Peach Tree, Mark Levinson, Parasound, and other pieces. 

We also modify DACS, floorstanders and bookshelve speakers on a regular basis. Please call for pricing. 

Here are a few excerpts of the review online on Home Theater Review by Terry London:

"Excited to contact Sean Scoggin of Stereo Dave's Audio Alternative, I called him to discuss what his modifications were to the Pioneer SW-8MK2 and discovered that they use a proprietary method to influence and speed up the electron flow of the subwoofer's amplifier. Modifying the driver allows the subwoofer to move faster and have better freedom in its excursions for accuracy and speed in its ability to track the low frequencies it is replicating. All the modifications successfully work to quicken the subwoofer and increase its bandwidth/frequency range, making the subwoofer sound faster, more powerful, and deeper while still maintaining bass texture and detail.

When I got the pair of modified SW-8MK2 subwoofers from Sean, I set them up exactly as the stock pair had been set up in my system. To my amazement, I heard the sonic improvements in the first few moments of auditioning the modified pair. The modified SW-8MK2 subwoofers truly were much faster and more dynamic, they created deeper/flatter bass extension, and they had more accurate tonality in a natural way, making their integration with my Mandolins even more seamless. With this modification, the SW-8MK2 significantly outperformed my T-7.

...The modified version of the Pioneer SW-8MK2 subwoofer takes this already excellent performing unit to another sonic level across the board in speed, power, bass extension, and accurate bass tonality.

...if you choose to have the SW-8MK2 modification done by Sean Scoggin's company for an additional $150 (plus shipping and handling costs), you have a subwoofer that performs at a sonic level that normally would cost you at least a couple thousand dollars. "

Stereo Dave's Audio Alternative

Customer Feedback

Every once in a while, we get emails back from customers that take the time to let us know how they liked their modified units. Below is one of the recent ones referring to a Modified Pioneer Player:


So far the modified unit sounds and looks amazing. Thank you very much for all your work on it.

David from WA

Cambridge Audio CXU Blu-ray player

"Hi Sean

I had a chance to do some listening to the modified Oppo (103) player and was not prepared for the difference in sound I heard compared to the stock unit. Most noticeably, the sound stage has hugely expanded, which, upon first hearing, made me shake my head in disbelief. The location of the instruments is more precise and the low end frequency much more palpable. There is just "more" of everything in the presentation of the music. I have had many mods done to my audio equipment over the years and your mod ranks near the top of the list for the degree for sonic improvement for the investment. You mod is a huge improvement over the already fine stock unit. Thanks a million!" Mark from California


I love the sound of the modified player. I have it hooked up using the analog inputs. I didn’t change anything in my set up except to swap players. It sounds way different than the Denon 2900: better in every way. The biggest difference for me was how the player made the speakers disappear. Does that make sense? Music sounded ok with the Denon, but it was just a source to play cd’s, nothing special.

I listen to all types of music: swing music from the 30’s and 40’s, Latin or Salsa music for dancing, smooth jazz for night time listening, 70’s soft rock and classic rock. I’m all over the board. The player did make a difference in the presentation of the music. One example is the bass: the Denon’s bass was rather bloated. I didn’t notice this until i had the chance to listen to the Pioneer. The Pioneer’s bass was more natural. The bass blended better with the music and didn’t sound like it was “in your face”.

The vocals sound great as well. Even my 14 year old commented on how the voices sounded smoother and more natural. He even mentioned that it sounded like there was a center channel speaker hidden somewhere for the voices to come out of and “float in the air”. Nope, just my Tekton Lore speakers.

The Pioneer has taken my listening enjoyment to a new level. Kudos to whoever designed the mod because it does sound awesome!

Thank you, 

Here is feedback from one of our modified HK 990 units from a customer:


Forgive the late feedback, but just to say I absolutely love the amp. This is just the sound I was looking for.

Thank you,


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Last 12 months

Member since November 2009

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