SKU: 39594988922

Soulnote M-3X Mono Power Amplifier

Sale price$15750.00 Regular price$17500.00
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Description

Soulnote M-3X Mono Power AmplifierM3X This is a current boosted version of the M 3 Monoblock Power Amplifier Premium Silver Premium Black. It doubles the current supply capacity without compromising the spatial expression and penetration power that are characteristic of single push amplifiers, successfully achieving both delicate expression and overwhelming driving power. Newly Developed Transistor Pairing Method: We've developed a new, precise pairing method that even aligns the hfe

M3X

This is a current-boosted version of the M-3 Monoblock Power Amplifier

Premium Silver/Premium Black.

It doubles the current supply capacity without compromising the spatial expression and penetration power that are characteristic of single-push amplifiers, successfully achieving both delicate expression and overwhelming driving power.

Newly Developed Transistor Pairing Method:

We've developed a new, precise pairing method that even aligns the hfe (current gain) fluctuation rate, which changes over time due to changes in transistor current during music playback. We input hfe measurement data for numerous transistors at various current values, calculate the Euclidean distance for all combinations, and select transistor pairs that fall within a reference value (a level that can be considered identical when measurement error is taken into account). This method achieves a "smooth parallel push-pull" that rivals single push-pull. The output stage employs a pair of industrial TO3 (metal can type) transistors, the same as used in the M-3. To easily drive the two TO3 transistors, a TO3P transistor is also used in the driver stage, resulting in a total of four-stage Darlington configuration.

Copper Plate Heatsink Doubles as Busbar

The main heatsink is a lightweight, compact copper plate heatsink, something unheard of in conventional high-output amplifiers. This heatsink also serves as the power busbar for the can-type transistors, whose terminals penetrate the busbar and are mounted directly to the PCB directly below. This eliminates the wiring that is a drawback of can-type transistors, eliminating instability caused by inductance components while also eliminating the degradation in sound quality that can be caused by damping the device with an insulating sheet. Furthermore, the heatsink's physical isolation from the chassis provides a sense of freedom and clarity, providing a tremendous effect on sound quality. This truly kills three birds with one stone. Furthermore, the elimination of the insulating sheet in the M-3X improves the thermal coupling of the transistors, eliminating the time axis bleeding caused by temperature differences.

The voltage amplification stage employs a non-feedback differential circuit (new Type-R circuit) redesigned specifically for power amplifiers. The gainless differential circuit, emitter follower, and full-swing voltage amplification are achieved by a single transistor. This transistor's load resistor is connected only to GND, creating a "single-stage, single-ended, non-feedback circuit to GND." This new Type-R circuit, consisting of only four bipolar transistors and ten resistors, is essentially the same as a vacuum tube single-ended amplifier, but delivers wideband, full-swing output in a more streamlined manner. It's an ideal non-feedback circuit, worthy of being called a reference.

Ultra-simple configuration

The M-3 was born from the discovery that a power amplifier handling large currents should be dedicated to a single function. It has only one set of input and speaker terminals. It is a single-function monoblock power amplifier, lacking not only a selector or attenuator, but also any other switching functions. The signal input from the XLR terminal is connected directly to the base of the first-stage transistor, amplified in a single stage, and output via a single push-pull. The only operation required is the power switch. Of course, there are no unnecessary circuits or components, such as a microcontroller

.

Ultra-low copper loss 1600VA non-impregnated toroidal power transformer

We have developed the largest power transformer allowed under the condition that it can be carried by one person.The huge power transformer is mounted vertically on the front panel so that the direction of leakage flux is parallel to the board, and is suspended by a titanium washer to prevent harmful vibrations from being transmitted to the chassis, and is grounded with a single spike directly below it.

The high-speed non-feedback power supply

rectifier capacitor uses a specially selected, high-voltage, small-capacity, low-magnification foil filter capacitor with a capacity of just 470uF. By optimizing the capacitance through the number of capacitors used and reducing the load on the power transformer, the effective regulation of the ultra-powerful power transformer is further improved. The rectifier diode also uses a new, latest-spec SiC diode with an increased allowable inrush current value. This is the most powerful and high-speed power supply configuration imaginable.

The amplifier container is completely separate from the main housing and supports itself with three spikes.

The M-3X has a total of six spikes: three on the main housing and three on the amplifier container. Even though the two housings are completely physically separated, the power supply line from the power transformer is kept as short as possible, eliminating the effects of transformer vibration and leakage. The overwhelming effect on sound quality achieved by this ideal construction can be experienced by removing and attaching the shipping screws. Of course, the top panel, AC adapter, speaker terminals, input terminals, and bottom panel are all left unattached for the sake of sound quality.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 39594988922

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4.5 ★★★★★
Based on 27 reviews
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D
Verified Purchase
Devin McKey
West Palm Beach, US
★★★★★ 5
My dog loves it, holds up well
Size: Large, Color: Blue
My German Shepherd absolutely loves this ball! He is a pretty aggressive chewer and it has held up really well, not indestructible but it lasts. We currently have three and he always has one in his mouth.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
G
Verified Purchase
GBG
Belleville, US
★★★★★ 5
Lasted a year with a Great Dane
Size: Large, Color: Red, Size: Large, Color: Red
It lasted an entire year as my Great Dane’s favorite squeaky ball. The only reason it’s failing is because the squeaker no longer works great.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
B
Verified Purchase
Billy Six
Birmingham, US
★★★★★ 3
Not indestructible but pretty darn tuff for sure!
Size: Large, Color: Blue
I would have maybe given a better rating if they hadn’t lied about it being indestructible and recommended it for my dogs size range! It didn’t last the first day. However my dog may be a bit above average when it comes to his relationship with the balls! It’s an issue and he should probably be in a 12 step program of some kind. But we all have our vices right and his is balls. All of them he needs em and he never stops joining for them and the stronger they are the more he’s driven to defeat it! So now that you have full disclosure from me. The ball is still in his box and it’s still round and mostly intact and that’s after several months! The part that didn’t last the first day was the squeaker! Poor little dude! If he would have just stayed quite it. But he didn’t and Bo dog knew he was in there! And made short work of him. Other than that. The ball pretty dang tough! But it’s not indestructible is it a big deal. Well in this world of way to many choices and then having to find the few that will tell you honestly what your getting and are not over stating their product! Just to get your money. And couldn’t care less about the quality! It sucks that we have to navigate all the crap to find the few decent things available. So it most certainly does matter! And I say that for their benefit the most hopefully! Because people are craving and constantly looking for a company that just makes the effort to put out the best they can. And tell you the honest description of what they have. That stands behind their work and puts more effort into quality then they do into profit. With the faith that the quality and integrity in their company will end up bring them the profits they can be proud of and know that they earned! Honestly! Is this company one of those! I don’t know? It’s not clear and in their defense I never reported the sneaky man’s demise on day one! I expected that. But indestructible is a descriptive word that has a very specific meaning. And when it’s used in a manner that it was! Then you’ve set yourself up to fail as there are very few things that meet that description! And I know I’m picking hairs here. But it’s words that get used like that wich makes one appear to have not met the standard they wanted to! And maybe you don’t realize its impact on your overall until it’s far down the road! Can it be said better. Sure . Always room for improvement. But I would certainly remove the claim that’s just unreasonable to expect. If I wanted to use the benifit the does have to offer perhaps I would have said this ball is the closest thing to indestructible we’ve made so far. That’s statement tell me that they are not claiming it is but that it’s pretty tough! And it with out exact words tells you these guys must take honesty seriously or they wouldn’t have chosen to claim the accurate step below. And that lets me know that they hold themselves to a standard that they obviously respect their customers and they don’t take them for granted that’s integrity right there and there’s just not enough of it o. This world today! Seems to me that there are a few that are really close to it though. Maybe so close it’s worth the time to just go ahead and say it. If my gut feeling is right then it’s absolutely worth the time! Do I recommend the item absolutely it’s as tough as nails! And if you hate the squeaky part. Then don’t worry it won’t last long if your dogs like mine. Or you can take the little dude out when the dogs sleeping! And I’m going to add a star because when I look at it in the wider view I’ve been a bit harder then is justified I believe. Their. Our lives today are not as good as they once were and should be! Because of our bad habit of not holding ourselves to the standards we are capable of and rather settling for what’s out there at the time. Because of many reasons right. What’s the point. Or it’s not going to change a thing. Or that as good as it needs to be. Don’t want to seem so picky and all the justification we inject in the place of our potential. That’s had a vey negative effect across the board! And we’re losing so much more then quality dog toys as a result. When we let or standards drop due to whatever reasons as a civilization then are standards drop. And that’s all you should need to know. To understand where that leads! And we only do ourselves the disservice and loss that comes from those choices. So look around and don’t hesitate to. All out that when you see it. Just try and come from a place that’s not to tear things down but to remind them of what they are really capable of! And how much we all need to hold ourselves to the highest standard we are capable of! And stop justifying excepting less! And then we see the results from that rather than the other.
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Reviewed in the United States on August 18, 2025
A
Verified Purchase
Amber McIntosh
Grantham, US
★★★★★ 5
MUST BUY! For large Dogs Safe & Fun! 100lb Dutch shepherd loves this
Size: Large, Color: Blue, Size: Large, Color: Blue
I have 100 pound Dutch Shepherd who likes to chew and he goes through toys pretty quickly. This one he has been chewing on for hours and has not made a dent, not one!! he loves it. He bounces it. It’s very bouncy. I love that about it the engagement with it is great! noise level. It makes some noise. I’ve got wood floors so you can hear it bouncing and the squeak is pretty loud, which is fine with me. It doesn’t bother me. My pet really really enjoys this a lot. I think this is an amazing value for the money because I’ve spent more money on other toys and they fell apart within a day. I think it’s a safe toy because he’s not got a little hard plastic pieces that are coming off of it. It does not break apart very easily and the size is good. it fits in the palm of my hand so it’s pretty good size ball for him. It’s big enough. He cannot swallow it, but he can fit it in his mouth. I think the thing that I like the most about it and he enjoys is that when he drops it, it bounces and he can chase it. Pet enjoyment 10 out of 10 engagement 10 out of 10. I feel it’s very safe dog friendly absolutely must buy hands-down. You will not be disappointed. It’s made of a very strong. I would say rubber and it’s super easy to clean. Just toss it in the sink. Wash it off with soap and water rinse it. It’s good to go. I’m running to buy another one right now as we speak so just in case he loses it, he’ll have a backup.
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Reviewed in the United States on May 27, 2026
E
Verified Purchase
Elysa S.
Pawtucket, US
★★★★★ 5
Great, solid toy safe for my dog
Size: Large, Color: Blue, Size: Large, Color: Blue
This ball is great! My pit bull love toys, especially ones with squeakers, but she’s a power chewer and trashes them almost immediately. Since she’s got a history of swallowing foreign bodies, this means she’s rarely been able to have toys, and when she does get them, it’s short lived. She LOVES this ball and it’s already lasted multiple weeks with no signs of any damage, despite the fact she carries it everywhere and chews on it daily. We don’t have to worry about her safety with this toy, because it’s large and tough enough she can’t swallow anything. It hasn’t lost its squeak either despite all her tough love. She loves to play with it and we’re getting more of them asap so she has a backup if this one gets lost or eventually does break.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 2, 2026

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