Project Matrix

Below is a chronological project matrix to help customers navigate my ongoing projects. Feel free to review the various projects to see if something interests you. I will update the matrix as I progress through the various projects. 

Black Indicates the project is complete 

Blue indicates the project is still in development 

Revision Log (press CTRL+F to search this page for keywords) 

• 00 Created June 8th, 2023

• 02 2155, 2124, 2118 added July 5th, 2023
• 03 added additional notes to 1723, 1693 complete, 1866 updated,2213, 2153, 2207, 2214, 2264, 2277, 2181 added, General New added. 
• 04 12/12/2023, ES250 No.2213 added, link for 15LX60V2 on 1798 added. testing link on 15SW800 added, Crossover 2264 developed for Horn No.1931, updated status on Nighthawk 1636 V2, Purifi 8" project updated, Nighthawk general info updated, Additional testing done on 1416 using BMS 4592, update on Lamar M3, 1693 open baffle updated, 1816 conical horn updated, 1866 updated. 
• 05 7/7/2025 ES-600 Biradial added to product summary, update provided on 2181. We now offer Line Magnetic WE555 Field Coil Compression Drivers and 597 Field Coil Super Tweeters for integration into our horn products (see 2497). Projects updated to 3160. 

Biradial Product Summary 

• ES-2000 Biradial No.1135
• ES-1200 Biradial No.1054
• ES-800 Biradial No.1094
• ES-600 Biradial No.1978
• ES-450 Biradial No.1993
• ES-290 Biradial No.1670
• ES-250 Biradial No.2213

Project Matrix 

• 1159 Stand-Mount using SB Acoustics Drivers

• 1159.2 updated crossover to improve imaging (Jan '23) 
• Plans available by request 
• 1159.3 Woofer size increased to 6.5" and enclosure made deeper 
• Plans available by request 
• 1274 Mid-Bass Cabinet 
• Been discontinued (replaced by cabinet No.1798)
• 1416 Co-Entrant Horn 

• Built on-off build for customer 
• Plans available by request 
• Crossoverless design on midrange, very simply crossover on HF 
• Co-entrant technology available hobbyists or commercial licensing (please contact) 
• No plans are published on my site (please contact) 
• 12/12/23 Tested BMS 4592 on 300Hz Circular ES Horn. Please email me for full test data as I did not publish on my website. 
• 1309 Sabourin 

• • Introduced plans in '22 using GRS Planar 
  • Changed Eton woofer to Lavoce 12" subwoofer or Dayton 12" woofer
  • Dual compression driver option added (May '23)
    • 12/12/23 decided to not develop this further, too many other projects. 
    • Passive crossover to be developed and published (summer '23) 
  • Horn No.1931 added (3D printed and CAD Plans)
• 1349 Nighthawk V2 (V1 was featured here) 

• Build and testing ongoing <12/12/23 complete 
• Changing all sheet metal to x2 thickness to strengthen <12/12/23 complete 
• Crossover development underway (June '23) <12/12/23 complete 
• Delivered first pair of V2 to customer. Pictures can be found here. 
• Building two pairs (one pair spoken for) 
  • Second pair won't have the vertical seem down the middle for a cleaner overall appearance 
  • Will have better fastening features to assemble pieces togethering with 3/8" machine bolts 
• 12/12/23 second pair sold, remaking horn and side cheeks in walnut for second pair. 
• Second V2 nighthawk will be made in x4 pieces instead of x8 pieces like the first pair. (otherwise identical to first pair) 
• 12/12/2023 Design development on V2 is finished and we are finish assembling the last pair of the V2 design for the customer.
• 12/12/2023 Full test data will be published on V2 in Q1 '24
• 12/12/2023 I will no longer be producing the V2 Nighthawk. All future builds will be V3 with small improvements in a variety of areas:
  • See updates on project No.2730 below.(11/4/24)
  • See updates on project No.2730 below.(11/4/24)
  • I should note as well that the Hypex products are extremely good, providing world class low distortion as well as full DSP capability for room correction. 

  • 

    My General thoughts on the Nighthawk is that is represents the pinnacle of what I've been able to achieve in terms of sound quality. I'm confident that this product will eventually become legendary for it's beauty and stunning sound quality. My trip to High End Munich confirmed to me that the Nighthawk is in a league of its own for ultimate resolution, soundstage, and overall musical enjoyment. 
• AE Dipole15 replaces SB Audience 15OB350
• Viawave SRT-7 will remain. Dmitrii Malinovskii of Viawave confirmed that they are ready to supply tweeters in 02/24 which is a huge relief to me for their sake...such a great tweeter. 
• V3 will remain fully passive, however, going active on the low frequency would be advisable if using low power tube amplification on the mid and high frequency. That way I can remove the fixed resistor l-pad on the midrange and treble allowing 100dB sensitivity. Otherwise the fully passive version is only 90dB sensitivity @1w (limited by the bass section's sensitivity) The crossover point on the Nighthawk is extremely low at 120Hz, so your cherished tube amp can cover the entire vocal range up into the treble. Additionally, if using the Hypex FA501 plate amp for the bass section, it can receive a speaker level signal from your tube amp! This captures the tonal qualities of the tube amp for the bass section as well, even though it is being powered by 500w of class D. 
• 7/7/24 V3 Build for Adam in Pheonix AR. Information on this build is featured here. 
• 1680 Floorstander 10" 2-way 

• No changes > available as a custom build 
• Thomas Stereo to review (summer '23) 
  • Jay subsequently featured the 1680 in another video awarding it as one of the best speakers of the year for it's price category. 
• 12/12/23 Thomas changed direction with his channel and did not review my product. It reviewed well with Thomas saying the speaker was an "end game" product. 
• Jay's Youtube Channel conducted a review here. (11/4/24)
• 1736 2-way Stand Mount using 8" Purifi 

• • Tested new horn No.2007 with Peerless tweeter
    
  • Built cabinet and evaluating in listening room using active setup (May '23) 
    • Updated blog post with measurements on the woofer itself, found here. 
    • I was considering doing a dual 10" woofer version of the 1798 cabinet but I don't think I will go that direction due to cost. That design study was done here. 
    • 12/12/2023 Due to workload I've had to put this project on hold. There is no timeline on completion
• 2807 15" Large Scale Horn Speaker System 

• Design development complete (Fall '22) 
• TAD TL1601B standard driver of choice (available new)
• Developed complete system using ES290 (passive) (spring '23) 
• Demo video here
• Demo video here
• Testing SB Audience 15" Subwoofer 15SW600 (summer '23)
• Testing Beyma 15LX60V2 (summer '23)
• Testing Lamar M3 Alnico (July '23)
• Designed custom 200Hz biradial 
• Removing Western Electric throat adapter and bolting directly to horn using 18mm throat and x6 M5 bolt pattern 
• 12/12/23 I have been experimenting with this driver and I'm still playing with it. I mounted it to my ES-600 Biradial with excellent results, ruler flat frequency response out to 12kHz. 
• 7/7/25 Decided to move in another direction after final evaluation. 
• Getting Yuichi A290 horns for direct comparison to ES290 (Horn No.1670) (summer '23) 
  • Could not publish due to commercial constraints 
  • Test data turned out to do really well with wide coverage and good loading down to 300Hz 
  • Tested a variety of drivers and found some great combinations
  • Blog post featured A290 can be found here. 
• 12/12/23 Received horns and did full measurements 
• Making custom horn for Fostex T96A to replace existing front horn lens, material is lacewood. (reference project No.1896)
• 12/12/23 complete, product page found here. 
• Plan on demoing at Toronto Audiofest Fall '23 
• 12/12/2023 I decided against this route since I am already very busy and I don't simply have product sitting on the shelf that I'm trying to move. But I did attend and enjoy the show. I had some very interesting conversations with a few people. I spoke with the owner of Emotiva for 40 minutes that would have made an amazing interview. I spoke with Emotiva's main design development engineer and discussed amplifier distortion with him at length, that was fascinating. 
• Working with Lamar on 21" Field Coil Woofer version of cabinet 
• Will use Lamar M2 or M3 as a 2-way setup using 300Hz crossover point 
• These plans have been cancelled. (11/4/2024)
• 11/7/2024 This system was finished using a walnut ES-290 biradial along with the T90A/2258 horn lens as the super tweeter. The system is sold to a new Listening Bar/Jazz Kissa Cafe in Vancouver BC, Canada. I will post photos once they are installed in the Jazz Cafe in March 2025. Picture of the finished system is shown below. 
• 
  
• 03/18/2025 The Listening Bar/Jazz Kissa Cafe ran into serious financial difficulty and had to pull out from the order. The system is now inventory and heavily discounted. 
• 07/07/2025 We have a second set of partially finished 2087 speakers in inventory as well. We started this pair assuming the Listening Bar commission was going to go through (which unfortunately did not). So we now have x2 pairs of 2087 in inventory (see pictures below for second pair in inventory)
• 
• 1695 Open Baffle, 15" 3-way using 10" Seas and 1.40" horn 

• Design complete 
• Metal support brackets getting plasma cut 
• Fully developed passive crossover and baffle almost ready for CNC (May '23)
• Shipped and complete 
  • Please contact for test data if interested 
• Did not publish test data due to time constraints 
• 12/12/2023 Don Sachs provided a really nice review on his open baffle speakers which can be found here. 
• 11/4/2024 We continue to produce this model. To date we've shipped x3 pairs and have orders for x2 more pair. I will provide customer feedback once they have some listening time on them. 
• We did more testing and found that they are suitable for small rooms as well. Bass can be controlled (reduced) by placing the speaker closer to the front wall. I discussed this a bit in a recent Instagram post here. 
• 1723 Large format midrange horn (200Hz Fc) 
  • 
  • Did not publish test data on Y-Adapter but we found that the adapter worked as expected which lowered distortion by about 6dB and had no detrimental affect on frequency response. For pro sound applications requiring very high SPL. 
• Tested Celestion Axi2050, BMS 4599, RCF ND950
• Making Y-Adapter for BMS 4590 (3D Printed) (July '23) 
• Tested 18sound 10NMBA520 10” Midrange on Horn No.1723
• Classic Series 

• Comprised of 1835, 1836
• Continuing to design custom cabinets and horns as per order 

• 1797 Pro-Sound Mid Bass 

• Design complete spring '23
• Customer testing in Quebec summer of '23 
• Postponed to November '23
• Design changed to stackable single driver cabinets (April '23) 
• Beta testers welcome 
• 7/7/2025 Click here for the final DIY plans. 
• 1816 Conical Petal Horn 

• Released plans for 300Hz mid horn 
• Plan to release HF petal horn (Summer '23) 
• 12/12/2023 Decided against this as it is too close to the OMA products 
• 7/7/2025 These 3D CAD Files are available by request, please contact. 
• 1861 Biradal for RAAL 

• Designed and build custom horn for RAAL 210 Lazy Boy 
• Issued CAD plans on site 
• Continue to design or build custom horns for various RAAL and other pure ribbon, AMT, and Planar, please contact.
• 1866 Fullrange driver plans using Markaudio CHR120 

• Issued plan set April '23
• Developing shallow horn 3" fullrange drivers and using 1866 as a bass cabinet (reference short horn No.1928)
• Will be releasing complete plan set using 1928 and 1866, stay tuned. 
• Been listening to 1928 in main sysytem for a few months now (October '23) and sound quality is really good. Been optimizing passive crossover. Very good system for small room near field listening. 
• 12/12/2023 I will be optimizing the design on this further by integrating the driver into a back loaded horn (BLH). Some of this development can be found here. 
• 
• 11/4/2024 We've sold the x2 pair of walnut shallow horns that we had in inventory. The shallow horn concept proved out to be very successful in terms of sound quality. The FF85WK has dome tweeter smoothness in a point source configuration. I continue to suggest this configuration when getting fullrange driver inquiries. 
• 1900 Small Desktop monitor 

• Introduced May '23 
• Successfully created concrete injection mold to make horn and made a prototype!
• Proof of concept, will continue to develop concrete injection molding process for other horn sizes and types. 
• 11/7/2024 I plan on looking at concrete further especially now that I am in my new workshop. 

• Successfully had local supplier make horn from ceramic, kiln fired with artistic glaze (offering in fall of '23) 
• (11/7/24) Supplier has decided to move away to the Netherlands. 
• 1901 Circular Baffle for 8" fullrange 

• Built pair in cherry in spring of '23 
• Customer reported excellent sound quality results 
• Please contact for custom quote 
• 1905 Waveguide for Dayton Audio AMTPRO4
  • 12/12/23 complete, product page can be found here. 
• Completed finned version here.
• Building pair in walnut with 3D printed throat adapter (July '23)
• Taking orders for extra pairs (please contact) 
• 12/12/23 I had a larger version of the 1905 printed that is basically a scaled up version with wide coverage down to 2kHz instead of 4kHz. I have the prototype horn printed but I haven't tested it yet. It measures 40cm x 40cm and looks quite impressive. 
• 1929 Conceptual Wide Coverage Horn (multicell) 
• Design complete and issued for free to beta testers 
• Attempted testing but could not successfully 3D print since the openings in the throat were too small 
• Changing design to 50% less cell density (fall '23) 
• 1930 Trying to design a hexagon version but having difficulty modelling in solidworks 
• 12/12/23 No further plans to peruse additional design work on this since I've been able to successfully develop a biradial ultra-wide horn found here. 
• 1931 Full ES horn for GRS Planar 
• Designed for 3D printing 
• Horn split horizontally to allow on 340 x 340 print bed 
• Custom rear vented cover 
• 
• 1937 Large 15" 2-way Studio Monitor (TAD style) 

• Issued plans fall '22 
• Replaced monitor 1362 
• Available as a custom turn-key build using new TAD Drivers (TL1601B + TD4003). Contact for pricing. 
• 1939 ES450 Biradial 
• New size variant the fill gap between ES290 and ES600 biradial 
• 12/12/23 Full test data found here. 
• No product page exists yet for the horns. However they are part of a few Turn-key builds that we offer (2095 or 2800).
• We offer the horns for sale in either raw machined state or finished. Please contact for a quote. 
• 1978 Revised design for ES-600 Biradial 

• Changed design to include draft angles similar to latest ES290 1670
• Added Viablue UFO feet x3 pocketed into bottom of horn 
• Added custom Joseph Crowe decal in brushed copper on black 
• Added optional heavy duty 3D printed throat adapter that transitions 1.4" throat down to 1" throat. 
• Accommodates standard 76mm bolt circle pattern 
• Allows flexibility to use either 1" or 1.4" drivers 
• Making one pair for customer (June '23) with another pair being made for inventory (please contact)  
• 12/12/23 both pairs mentioned above have been sold, but we are in the process of making more horns, even in oak with the chocolate Rubio 2C wax finish which looks amazing. 
• Introduced speaker plans No.2154 that uses Horn No.1978 along with compression driver rear cover No.1978-01-005 
• 7/7/2025 This horn is used in a variety of DIY plans (See 1815, 2154, 2155)
• 2015 10" MTM  2-way plan set using Scanpeak 10" and 1" horn 

• Released May '23
• 12/12/23 I've updated the crossover on this plan set to include some of the improvement I discovered with the open baffle project No.1695. The improvements include making the crossover first order instead of second order, and reducing the amount of baffle step compensation. The improved crossover is step up in coherency. This is an excellent sounding project. 
• 2037 Speaker System No.2037 - 6.5" 2-way Plan Set
• 
• 6.5" SB Acoustics  SB17NRX2C35-4 woofer 
• Peerless OC25SC65-04 25mm Dome Tweeter 1
• 2099 Focusrite Scarlett Solo replacement 
  • As a result of my new measurement setup, I can now measure electronics with a resolution down to -120dB. 
  • I've started a new blog category for electronics testing which can be found here. 
• Looking for low noise preamp for speaker testing 
• Considering purchasing Universal Audio Apollo Duo X preamp based on specifications. 
• 12/12/23 I am now using my new measurement system. For those interested in what I ended up using, please send me an email. 
• 2100 Eminence N314x
• Tested on ES600 Biradial 
• Quite impressed with sound quality 
• Want to update 1815 
• 2118 Custom ES100 Biradial Design for End User 
• 
• 
• 12/12/23 This project has started and I've had to commission a CNC shop in Ottawa to build the horn for me since it is too large to do on my own CNC. The horn is massive and comprised of four sections plus a throat adapter. The Fc is 100Hz and the throat diameter is 125mm. I am developing my own compression driver for this project which uses a 10" low QTS mid-bass driver. My plan is to develop a phase plug and rear chamber for the 10". Some of the testing on this can be found here. 
• The 10" driver referenced above will work with my new ES250 biradial as well. The mid-bass and lower midrange sound quality I was getting by horn loading the 10NMBA520 was the most effortless sound I have heard. It is also the lowest distortion solution I've been able to find to date for this part of the frequency spectrum with IMD being a whopping -75dB down. 
• 2124 Y-Adapter for Horn 1723, to be 3D printed and tested (July '23) 
• 12/12/23 complete, customer reports excellent results using the Y-Adapter. 
• 
• 2154 Speaker Plans 15” 2-Way
• 2155 Speaker Plans 15" 2-Way using 15LX60V2 
• 
•  2181 Custom design project where I will be developing a 3-way 12" and 15" speaker using the following 
  • Will publish test data on horns referenced  
  • From my testing and listening I found that the AH340 with the DCM50 was an excellent sounding combo. I will be using this combo in a 'Beyond the Ariel' project I've been commissioned to do for Lynn Olsen. Lynn is using the Altec 416-8B for his bass and mid-bass. The AH340+DCM50 can serve as a 2-way solution with the addition of a super tweeter completely optional. Personally the coherent source and rich warm sound of the DCM50 is hard to beat for home Hifi. I look forward to testing this especially with tube amplification which would be truly special. 
• Beyma 12LX60V2 and 15LX60V2 
• B&C DCM50 with Martin Azura Horn AH340 and AH425 respectively 
• RCF ND350 with Martin Asura Horn AH-1000
• 12/12/23 Complete 
• 7/7/25 I will be visiting Manhattan this summer to see my creations in person at the Silence Please Cafe.  I will be giving a tech talk to the group there. More details to follow. 

• 2153 15" 3-way BLH design and build for DIY customer 
• 
  • Test data coming in November '23
• Supravox EXC-380 Field Coil woofer 
• ES-450 No.2143 with B&C DCM50 16ohm
• Fostex T900A with Horn Lens No.2258
• Cabinet finished in Birdseye maple veneer!
• Custom passive crossover (outboard) 
• 12/12/2023 The project is complete. I've done the crossover for this the other day and I was really impressed by the palpable, nuanced, and dynamic bass character of the BLH. The shear output capability of a 15" BLH is something to experience!  The entire speaker system has a level of clarity that is up there with the best I've heard. Back loaded horns will continue to be a focus of mine for 2024. 
• 11/01/2024 Built x3 more pairs as per order, resulting in great reviews which are posted on the 2095 product page. 

• 2173 Provided custom testing for a customer based on specific request which included subjective listening assessment. Results of this can be found here. 
• 2187 Designed large horn for Dayton AMTPRO4 measuring 40cm wide x 30cm tall using dispersion phase plug. I printed the horn but never got around to actually testing it. The idea with this horn was to provide ultra-wide coverage lower down into the frequency range compared to the smaller version horn found here. 

• 2207 Passive crossover design for Beyond the Ariel Speaker System 
  • Will test Yamaha JA6681B
  • Will test SB Audience 65CD-T with custom rear cover and throat adapter 
  • Will test other drivers such as B&C DCM50 16ohm, RCF ND950, Eminence N314X
  • 11/7/2024 From all the drivers tested I found the B&C DCM50 to be the best sounding in terms of smoothness and dynamics. It sounded great even on poor recordings but still offered the full dynamics that only a good compression driver can provide compared to other driver types (ribbon, planar, dome etc.). Using the T90A with the 2258 horn lens coming in at 10kHz with a steep filter to match the sharp rolloff of the DCM50 provided excellent coherency, soundstage width and depth. This driver and horn combination continues to be the basis for the 2095, 2087, and future 2800 system. 
• Altec 416-8B woofer in sealed 120L enclosure tested here. 
• Yuichi A290 Biradial Horn (test data found here)
• 7/7/2025 Project is on hold until the customer decides on what horn and driver he wants to use. 

• 2213 ES250 Biradial 
• 
  • Expect around 40hrs CNC time if making yourself 
  • Would be pretty amazing with the 1798 bass cabinet 
  • Customer requested an even bigger biradial horn 
  • So we made the 3D CAD files available here. 
  • Comprised of x10 layers of 8/4 hardwood (2" thick layers)
  • Please contact for a build quote 
• 12/12/2023 At this stage I am considering building a pair of ES250's for a system that is setup at my friend's and is available to purchase. The picture below is of the system with the 1798 cabinets. The ES450's on top are spoken for, so I need to build horns and a crossover to complete this system. I'm thinking of doing a 10" compression driver + ES250 combo for this system. The space pictured is where I do all of my final crossover tweaking and system adjustment, along with evaluation of any new products specific to large scale horn speaker systems. My friend Craig is enjoying whatever speakers I might have setup. Thank you Craig for letting me use your space! 
• 2214 Evaluate BMS 4592ND coaxial compression driver on ES300 circular horn
  • Test data coming November '23
  • 12/12/23 Complete but I just haven't had a chance to publish to my blog yet. Please contact if you would like the report. 
• 2264  crossover for Horn No.1931 and Fostex FW208HS in 40L bass reflex cabinet, includes crossover schematic with bill of materials based on suggested component brands. 
• 
  • 12/12/23 I purchased the RS225P instead and fully tested. I also directly compared against the Fostex FW208HS and found that the Fostex outperformed it that I did not publish the data on the Dayton. Instead I published the test data on the Fostex which can be found here. 
  • Please contact for plans 
  • No plans to publish yet since FW208HS is apparently going to be discontinued by Fostex (need to confirm) 
• 2277 BLH design using Fostex FE208EZ driver
  • Glass side cheeks to reveal internal horn path 
  • CNC stacked layer design
  • 12/12/23 complete, not published on my site. Please contact for inquiries. 
    
• 2279 Tested the Don Sachs Preamp. Did not have time to publish test data but the zipped folder can be found here. 
• 2281 Tested the Emotiva UPA-700 7 Channel Amplifier. Did not have time to publish test data but can be downloaded here. 
• 2282 Tested the Hypex Fusion FA123 plate amplifier. I tested distortion at the outputs using both the analogue and digital inputs. Data can be found here. 
• Tested Wiim Pro distortion with and without high grade power supply. Gm distortion appears slightly better with PSU upgrade. Details found here. 
• 2286 New Transmission line plan using Fostex FW165WK along with a nice contour circuit. Plans can be found here. Blog can be found here.