Although not a tech, I’ve been around and passionate about Hi Fi since I can remember, 5 decades or so. I own many sets of well known speakers and two sets of Sound Lab electrostatic speakers (Dynastats / M2PX’s) as my go to’s, but always figured someday I’d build a super efficient, robust set of dynamic loudspeakers to have around because, well, sometimes I enjoy a more aggressive presentation. Anyway, Danny was kind enough to answer my questions and gave me assurances that the Bully would impress, even when put up against my ESL’s. (I will not be comparing except to say there is much my Bully(s) can do which my Sound Labs cannot, however full range Sound Lab panels can do things no other speaker can.) Anyway, Danny’s good natured presentations on You Tube convinced me his design philosophy is sound, gain path matters, parts matter, and crossover design is paramount relative to excellence in audio reproduction. After our conversation, I ordered the flatpack cabinet kits first. I figured if I screwed them up, I’d just order an assembled pair. The build went well given there were no instructions per se. Danny did send me a parts list with prints, this was enough to get me on my way. For some DIY folks the cabinet build might be intuitive, but these cabinets are complex; the bracing is extensive throughout the volume of the cabinet which comes in close to 70lbs before components. Note: it seemed to me a couple of the left cabinet internal parts were a tad off, (primary divider?) and one part (brace) was 1/8″ short, fixed with a bit of quality construction adhesive. It is my opinion, having worked in production cabinet manufacture once upon a time, (we built “standard” and “flop” for different apartments and duplex dwellings) that sometimes the “flop” line took a tad longer to dial in, hehehe… either that or I twisted something along the way while assembling the left cabinet. All I know is the outside dimensions turned out true and square with some trimming and refitting of some of the inside braces. (offset approx. 1/16) In any case, I do not believe this build is a beginner project. Also, since my garage is more a metal fab, bicycle and car shop, by the time I built a wood layout table, bought clamps, paint, sandpaper, sander, adhesives and fasteners, well, I didn’t save any money. I am not complaining, it was a gas building these speakers! I will always credit GR with this amazing design, but I will also know I built them. It was truly awesome, every minute. The good folks at GR answered all of my questions. I had many along the way, and I never waited more than a day for a response; some came within hours. Everything shipped was packed well, sorted logically, and everything GR delivered to us was of excellent quality. Anyway, my Bully build turned out amazing! They are more fun than I could have imagined, they sound great! I have barely scratched the surface given the flexibility of the PEQ amps, but I took to the basics readily and if I don’t touch those adjustments again these things will blow most folks minds. I make no claims to “Golden Ear” status, (I laugh at them) but folks in my circle trust my advice and recommendations, and I have been playing with gear of all stripes most of my life. The Bully is amazing, big and bad for sure. But they are also subtle, musical, image and become ghosts in the soundstage, and are nuanced to the point of being perfectly at home next to my reference speakers. Speakers are not headphones, so I really dig the fact they can be pointed straight ahead, and best of all, I bet they’ll never complain, man are they effortless, much like my ESL’s. Given my experience and purchase history, I don’t know where one could do better at twice the price, plus I don’t care. The Bully(s) are my last set of mains. That was the goal. Thank you GR Research! Oh, keep stirring that pot Danny, you are the real deal, and I am greatly amused by your detractors. Peace.

After considerable research I decided on the Bully’s and I’m happy with my decision.

I choose to build my speakers from scratch (no flat pack). I generally enjoyed the process. I did discover some errors and discrepancies in GR’s plans. This required minor to moderate rework of my nearly completed cabinets. Needless to say I was pretty hot for a day but got over it quickly. GR Research was helpful in resolving this snafu. In fact GR Research was responsive throughout the build. Calls were returned the same day as were emails.

If I built them again I would use 1” mdf for the outer boxes and 3/4 “ for bracing and the mtm boxes. The cabinets are nicely ‘dead’ except at the lower woofer section of the cabinets where bracing is limited as required to fit in the woofers. I may add some mdf banding around the outside of the lower cabinets to hopefully remove any hollow sounds from the cabinets. Yes the 1” mdf would add a fair amount of weight to the cabinets. That is fine with me. I finished the cabinets in Dura-Tex. Love the look and it is quite durable.

I finished the build in January 2025. My system is as follows: IFI silencer at the router. High quality Cat 8 Ethernet cable to a Wiim Pro streamer with IFI power supply to a Gustard R26 DAC. A Roger’s High Fidelity integrated tube amp finishes out the system. A DH Labs Silver Sonic cable feeds the DAC from the streamer. Analysis Plus interconnects are used. I hope to upgrade my streamer to a Rivo + or the new Eversolo T8 soon.

The sound is very satisfying and continues to improve. The Bully’s are very quite dynamic. I like to listen loud most of the time. Detail, soundstage, instrument separation and black background are all quite satisfying. The Bully’s sound improves significantly with each upgrade and tweak to my system. My goal is to equal or exceed a friend’s $40k + LP analog system for one-third the price. I’m getting closer and hope an upgraded streamer gets me there. I have not done any room acoustical mods yet whereas my friend has made substantial improvements to his listening room.

I used the GR Research speaker cable connects. Unfortunately they do not although alternate speaker cables to be auditioned. I plan to contact GR on this in case I’m missing something.

I fully recommend the Bully’s. They sound great and are definitely ‘Bad Ass’. I have the satisfaction of having built them with MY hands.

Go ahead and build a pair of Bully’s. You’ll be glad you did.

Although not a tech, I’ve been around and passionate about Hi Fi since I can remember, 5 decades or so. I own many sets of well known speakers and two sets of Sound Lab electrostatic speakers (Dynastats / M2PX’s) as my go to’s, but always figured someday I’d build a super efficient, robust set of dynamic loudspeakers to have around because, well, sometimes I enjoy a more aggressive presentation. Anyway, Danny was kind enough to answer my questions and gave me assurances that the Bully would impress, even when put up against my ESL’s. (I will not be comparing except to say there is much my Bully(s) can do which my Sound Labs cannot, however full range Sound Lab panels can do things no other speaker can.) Anyway, Danny’s good natured presentations on You Tube convinced me his design philosophy is sound, gain path matters, parts matter, and crossover design is paramount relative to excellence in audio reproduction. After our conversation, I ordered the flatpack cabinet kits first. I figured if I screwed them up, I’d just order an assembled pair. The build went well given there were no instructions per se. Danny did send me a parts list with prints, this was enough to get me on my way. For some DIY folks the cabinet build might be intuitive, but these cabinets are complex; the bracing is extensive throughout the volume of the cabinet which comes in close to 70lbs before components. Note: it seemed to me a couple of the left cabinet internal parts were a tad off, (primary divider?) and one part (brace) was 1/8″ short, fixed with a bit of quality construction adhesive. It is my opinion, having worked in production cabinet manufacture once upon a time, (we built “standard” and “flop” for different apartments and duplex dwellings) that sometimes the “flop” line took a tad longer to dial in, hehehe… either that or I twisted something along the way while assembling the left cabinet. All I know is the outside dimensions turned out true and square with some trimming and refitting of some of the inside braces. (offset approx. 1/16) In any case, I do not believe this build is a beginner project. Also, since my garage is more a metal fab, bicycle and car shop, by the time I built a wood layout table, bought clamps, paint, sandpaper, sander, adhesives and fasteners, well, I didn’t save any money. I am not complaining, it was a gas building these speakers! I will always credit GR with this amazing design, but I will also know I built them. It was truly awesome, every minute. The good folks at GR answered all of my questions. I had many along the way, and I never waited more than a day for a response; some came within hours. Everything shipped was packed well, sorted logically, and everything GR delivered to us was of excellent quality. Anyway, my Bully build turned out amazing! They are more fun than I could have imagined, they sound great! I have barely scratched the surface given the flexibility of the PEQ amps, but I took to the basics readily and if I don’t touch those adjustments again these things will blow most folks minds. I make no claims to “Golden Ear” status, (I laugh at them) but folks in my circle trust my advice and recommendations, and I have been playing with gear of all stripes most of my life. The Bully is amazing, big and bad for sure. But they are also subtle, musical, image and become ghosts in the soundstage, and are nuanced to the point of being perfectly at home next to my reference speakers. Speakers are not headphones, so I really dig the fact they can be pointed straight ahead, and best of all, I bet they’ll never complain, man are they effortless, much like my ESL’s. Given my experience and purchase history, I don’t know where one could do better at twice the price, plus I don’t care. The Bully(s) are my last set of mains. That was the goal. Thank you GR Research! Oh, keep stirring that pot Danny, you are the real deal, and I am greatly amused by your detractors. Peace.

After considerable research I decided on the Bully’s and I’m happy with my decision.

I choose to build my speakers from scratch (no flat pack). I generally enjoyed the process. I did discover some errors and discrepancies in GR’s plans. This required minor to moderate rework of my nearly completed cabinets. Needless to say I was pretty hot for a day but got over it quickly. GR Research was helpful in resolving this snafu. In fact GR Research was responsive throughout the build. Calls were returned the same day as were emails.

If I built them again I would use 1” mdf for the outer boxes and 3/4 “ for bracing and the mtm boxes. The cabinets are nicely ‘dead’ except at the lower woofer section of the cabinets where bracing is limited as required to fit in the woofers. I may add some mdf banding around the outside of the lower cabinets to hopefully remove any hollow sounds from the cabinets. Yes the 1” mdf would add a fair amount of weight to the cabinets. That is fine with me. I finished the cabinets in Dura-Tex. Love the look and it is quite durable.

I finished the build in January 2025. My system is as follows: IFI silencer at the router. High quality Cat 8 Ethernet cable to a Wiim Pro streamer with IFI power supply to a Gustard R26 DAC. A Roger’s High Fidelity integrated tube amp finishes out the system. A DH Labs Silver Sonic cable feeds the DAC from the streamer. Analysis Plus interconnects are used. I hope to upgrade my streamer to a Rivo + or the new Eversolo T8 soon.

The sound is very satisfying and continues to improve. The Bully’s are very quite dynamic. I like to listen loud most of the time. Detail, soundstage, instrument separation and black background are all quite satisfying. The Bully’s sound improves significantly with each upgrade and tweak to my system. My goal is to equal or exceed a friend’s $40k + LP analog system for one-third the price. I’m getting closer and hope an upgraded streamer gets me there. I have not done any room acoustical mods yet whereas my friend has made substantial improvements to his listening room.

I used the GR Research speaker cable connects. Unfortunately they do not although alternate speaker cables to be auditioned. I plan to contact GR on this in case I’m missing something.

I fully recommend the Bully’s. They sound great and are definitely ‘Bad Ass’. I have the satisfaction of having built them with MY hands.

Go ahead and build a pair of Bully’s. You’ll be glad you did.