diyAudio Store

So far i can not hear anything that it's doing wrong. Using it only for mid and highs with a electronic xover 300k on a multi
cell horns.Bryston on the lows on my 50 year and Khorns, Replaced a 20 year Audio Note P1se Tube amp.V1.8 kit sounds
very good but i need more time and install my tube amp back on the corner horns.I just turned 91 years old and still love
my music . Have fun, Sincerely,Otto.

This was my first DIY Audio kit and I am really glad I started with this one. The excellent build guide from 6L6 makes assembly easy. Having all needed parts and the chassis in one kit guarantees success in completing the project. The case was a little bit finicky to assemble, but all parts came together nicely and the amp looks and sounds great.

Great product for us diyers!

Good looking enclosures for projects are hard to find.
I really like the ones at DIYAUDIOSTORE store.
I have bought several Look great, work great, affordable.

The PCB arrived bang on time in England (Even with the Corona virus!) and well packed, I have never seen a PCB of this quality before, really well made in Black and gold, The 'Whammy' built into a headphone amp that sounds like a professional amp really easily and I would recommend this project for anybody with a little soldering ability. Thanks guys I would buy it again if somebody borrowed it and wouldn't bring it back! My version is 18V Trans, 20k Alps, MV2 case, Nichicon Caps, Dale Res, Bur Brown Op amp. Everything else as the instructions (which are very good).
P.s Did these guys design an amp as well? If so I want it.

Careful speaker selection is critical for listening volume but the bang for the buck is off the charts. It is also a fabulous way to explore single-ended and minimalist design advantages. It is often hard to balance detail versus edginess or unforgiving treatment of less than perfect recordings. This jem is spot on in this critical area while providing a spacious sound stage and great clarity. Additionally, it is a fabulous kit for initial exploration of audio electronics.

I could not be happier with the chassis.

Great kit, had a lot of fun building it.

This is an excellent kit. I've built many preamps for fun. But this one is a real keeper. It is a beautiful unit. I highly recommend it. The thread and the build guide is awesome. And Mr. Nelson design is top notch, second to none!

Nice little pcb that makes soldering to the ALPS-pot easy! Very recommended!

Great companion supply for the latest generation of the ACA. Highly recommended,

Easy to flow and professional looking results without fail. It's my first time using this type of solder, and you will be very pleased, even if you are a novice tech.

as always.
diyaudiostore is totally among the best!

as always.
diyaudiostore is totally among the best!

as always.
diyaudiostore is totally among the best!

very useful set of parts: solves both availability and matching for you in one go.

I'm EU based, so only ordered the parts kit from DIY Audio, the chassis is from the EU in any case. I've been building Eurorack modules for several years now, which means I have familiarity with getting a bag of parts, a circuit board, and some kind of a build guide-- that's part of what I'll be comparing to.

PCBs and components. All top quality. Very nice sturdy boards, Bournes trimmer pots, .... the baseline standard is "very good to excellent". You'll have to work hard find better components.

Board spacing is quite generous. My biggest learning issue was bending the resistors 1/4 inch out from their ends; my habit from Eurorack is to bend right where the wire leaves the ceramic. Soldering was simple and fast. I did have to raise the temperature for one or two joins where the contract traces were larger; this is expected as the larger traces pipe away the heat faster. I mentioned that I have experience, I want to add that yes, I still use the printed circuit diagram and check off each part as I add it to the board. I find this really satisfying, like crossing items off your to=do list, and a key to any successful build is parts management.

Eurorack usually doesn't require a wiring harness (it is usually etched into the top PCB, and you solder the jacks/pots/switches/LEDS directly into the PCB), so making the harness was more mental energy than expected. However, the amount of supplied wire is very generous and forgiving, and the instructions clear and straightforward. I enjoyed learning how the author(s) structured and present the information.

The instruction manual is very good. It is clearly designed for a motivated novice, i.e. small steps with lots of detail. It is also evident that the authors have walked many people through this, and iterated the build guide as they did so.

I work slowly, because this is a hobby not a job, and spend way too much time on each design decision. I'm about 5 hours in and just finishing the wire harness. I think I could build it in half the time next time.

Nice quality. It was a little difficult for me to tighten the inside philips screws on the heat sink rails. On future models, if hex screws are used, an Allen key can more easily reach the screws to tighten them.

Fast shipping.

Some error happend, but for me, no problem.
Pcb items received and all ok.

This was my first experience at building anything requiring soldering. The package was complete and the instructions well laid out. I have to say that this little amp is changing how I listen to music in my office as I change over and sell some equipment with the ACA at the center of everything. This won't be my last experience with Nelson's designs. Very well done.

I so love the first stereo ACA I built from late last year's release but wished it had a tad more power. Even with my very sensitive (96db) full-range Audax speakers. So patiently awaited the next release and voila got my chance for a second to create mono blocks! So I'll have to rewire the original (super easy - thank you Mr. Pass) and then I can "turn it to 11."

For those curious - amp has the warmth of an EL84 tube amp (my closest comparison), the crispness of a solid state, and the non-clipping high end of a D-class. They do need sensitive speakers, but those can be had for a very reasonable sum (BIC makes some good really affordable sensitive bookshelves and if you're a DIY-er, consider kits and parts from Partsexpress and Madisound). Of course if price is no object, there are loads of options.

Historically I've had KT88, EL34, EL84, class D 2020 & 21 tripaths, and MOSFET/SS amps - many varieties of all these types and I really love my ACAs.

So now to build my second, rewire my first, and build that Korg pre-amp. It's gonna be fab and well worth the wait!!

Quick delivery of these nonobtonium paired parts we audio-DIYer cherish so much - thanks!

I'm not done tuning it yet, but it is built and has been tested on big speakers, and it pushes them very well and sounds better than what I currently use in the living room. This was my first amp that I have built, and the support thread was very supportive. Very pleased with the overall experience and the sound is great! Nice amp, thanks!

I was floored upon hearing the amp just after biasing both channels. Never thought I can get this kind of sound from a diy kit. It was Sonic purity at its simplest!

It was easy to assemble and is exactly what I was expecting.

I used them to build two 360W RMS monoblocks amp. It came out very nice. Below is the picture of one of them.

Walter

The circuit boards are of excellent quality, and affordable!!! I bought them to use as my finished amp configuration after much experimenting with the originals in making circuit changes to tune the amp to my system.

Great kit! Assembled it in a few hours, without problems. Worked on first attempt and plays beautifully.

I never managed to get rid of some noise issues with my minidsp solution. Finally I have a silent background. Also the speakers still sound great! Maybe slightly "different", but not sure how to describe it. Could be the lack of noise :) Anyhow, this kit will stay in the system, without any doubt.

Thanks for the great job to everyone involved!

I have bought several chassis from these guys. What amazed me right out of the gate is everything was properly deburred. Everything was square, flat and without blemishes. Now when you go to drill your own holes in it you will discover that the aluminum is some recycled gummy crap. But if you are careful and use sharp tools you can produce nice looking cuts. If this was American made it would cost 3-5x what this does. Its actually a very good deal for the price. Leaps and bounds ahead of 20 years ago. If the plates are too thin go to home depot and buy some 1 x 1 x .09" aluminum angle and rivet or screw a few pieces on the inside of the panels it will fix you right up. These things have all the holes in the right spots, good workmanship, a decent anodized finish and its cheap. other than the crap they make it out of its a top notch product. And the crappy aluminum is plenty strong enough to sit there and be a box. Just be careful drilling it. Its like drilling bubble gum and if you attempt to deburr it with a rout-a-burr be damn careful as it will grab and take a much bigger cut then you want. Use a dull as hell deburring bit or better yet a file or sand paper.

Very excellent quality case, cannot fault the fit and finish one bit. This is exactly what I needed for my DAC/Amplifier project. Surprisingly fast shipping, took only 1 week from Italy! Highly recommended.

I liked the first one so much when I put it in my main system that I built a second one for my desktop system. This circuit deserves a high quality linear regulated power supply, especially if using the large outputs to drive headphones. I used the power supply as an excuse to learn KiCad and did a 2-layer PCB layout for the power supply section of Wayne's Whammy HPA. It does a great job. Another good power supply is Mark Johnson's VRDN, which has its own forum. Or search the BA2018 forum for other ideas.

This is a great a great enclosure/chassis. It is well designed and produced. I built Papa's F6 amp with this enclosure. And this enclosure made my project easy and fun. It looks great too! Initially, I set a low budget for enclosure. But I am glad that I changed my mind and purchased this. It was a game changer for me.

This is a great enclosure. Initially, I set a low budget for an enclosure. But I really am happy that I changed my mind. It is well designed and it looks fantastic. Assembling this enclosure was really easy. This enclosure cased Papa's F6 amp which is another great product. And it made my project much easier and therefore fun. In fact, it was a game changer for me. Well worth the price.

Excellent boards. Installed all components, biased up and working 100% and dead quiet

Even for an oldish geezer such as myself, Wayne Colburn's BA2018 linestage was a breeze to assemble. It performs like a champ: a broad and deep soundstage, excellent detail and a delight to listen to. Many thanks to Wayne and the diyAudio store for making this available!