The preferred chassis of William Alfred Noice. It's got holes in all the right places. Noice.
I have built two of these and in both cases outstanding results, one the second one for my son I put the 15v transformer in to make it run cooler, there is no sound difference in the two units. The other has a 22v transformer in it. Used 833 Op amps tried various found that I liked these the best. I love the sound through both my SennHeisers 600, and really love it through the HiFiMan Sundara. I would have to say its the best result I have had with a DYI build and also with any commercial Headphone amp. Build it you will not be sorry. The front panel is miss spelled but that's the beauty of a DYI you can do what you want to it.
I am glad I oredered with my Dissipante chassis - it made constuction of my amp so much easier.
As a new DIY audio builder, this was a perfect kit for me. I worked in the electronics contract manufacturing world for decades, but never made any of my own gear. The PCB was very high quality, well designed and well made. The parts kit was complete and organized. The build guide was excellent and well thought out (I built version 1.8). Combined with he support of the DIYAudio forum and the many articles available from Nelson Pass online, I learned a tremendous amount about DIY Audio and gained a lot of confidence for future builds. That combination really makes this kit stand out among other beginner DIY projects; It was a perfect combination of great product and quality education, not unlike an engineering lab class at the college level.
The final product sounds absolutely fantastic. I have a nice Yamaha receiver as my main system at home and had a small Lepai Class D amp in my office. This ACA Amp replaced the Lepai in my office and it was a tremendous step up in sound quality (I couldn't possibly go back to the Lepai, it made my ears tired after a couple of hours). It also surpasses my Yamaha receiver in sound quality. I have it connected to some Klipsch RB51 bookshelf speakers and fed by a DAC connected to my laptop and the system is wonderful in my office and gets louder than I would ever want. I find that myself getting lost in the music a bit to much these days and staying late at the office just to listen on many evenings.
The DIYAudio store has top notch customer service. From the time I placed the oder till the time I was enjoying music they were prompt, timely, communicative and have performance standards that rival the very best online stores. I will go out of my way to do business with them in the future.
Was an enjoyable and a rewarding experience building this kit.. I wasn’t expecting it to sound so good ! I thought the kit was more about learning and more of a “novelty” than a actual fine sounding amplifier.. I paired the amp with some NHT Super one speakers rated at 86db sensitivity thinking it wasn’t going to be “enough” power to be useful... I was pleased to hear these speakers come to Life and sound so natural and smooth .. Nice job once again Nelson and crew...
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.
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.
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.
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.
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!
I built this as a companion to the ACA. Love the sound of the ACA, but it needed a little boost at the front end, so enter the Korg B1. It's not a completely true pass through of the signal, but, set at the recommended level, the harmonics introduced are pleasant to the ear. For the price, I'd highly recommend this as much for it being fun to build, as it is enjoyable to listen to.
Llegaron a casa con bastante rapidez (España) los jfet y las PCB para montar un aleph J.
Como siempre, muy contento con la calidad del material además de la cantidad de información y facilidades para el montaje que facilitan muy amablemente desde diyaudio.
Aún estoy en el proceso de montaje en un chasis 4U, pero aquí dejo alguna foto (iré publicando mas a medida que vaya avanzando).
As you can see everything fit. The power regulator board and two tube based phono preamps. It looks really nice and works well. The raw DC power supply is remote for noise reasons. I use the Galaxy steal chassis for most of my projects. I'm currently working on the main preamp which will also fit nicely into the same chassis.
This is a preamp for us DIYers offered from the mastermind of the PassLabs preamps - Wayne Colburn.
It sounds very detailed combined with a clarity and without harshness. Bass is solid and controlled. I used
TOSHIBA TTA/TTC004B for the outputstage. Drives all my Poweramps (F-5T, BA-3, BA-1, M2X, 50W-SE-Schade)with ease.
Absolutely no noise audible in my combinations. Can also drive headphones (with big BJTs in the outputstage).
PCB is of excellent quality and was delivered very fast. Thanks to the DIYAUDIOSTORE-team!
Build it - enjoy it!
I wanted a high-quality HPA and didn’t wish to pay over-the-odds for sub-par consumer designs. As it was designed by a pro from a proper hi-fi company, I saw it as a bit of a no-brainer decision. The build took me about six days to complete with cutting chassis etc and making a few mistakes along the way. As it was my first time I wanted everything to be correct and my fussiness paid off this time - On Power up all was perfect and I was pleasantly surprised. Would definitely recommend this build to those who appreciate real hifi and music-lovers who don’t want to break the bank. I am a music-lover not an Audiophool.
been looking for a linestage that fits my M25 (Babelfish) better than BA3FE or other chippy preamps i tried.
this is it! clear sound - not mumpfy, not sharp.
till now i've just made the standard model running on 20VDC. no bigger semis in Q8/10 position.
still looking for a nice housing.
Thank you Wayne!
I built a pair of mofos and these are a joy to listen to. Often I listen to music and think that’s glaring or harsh or not revealing, but not with these. No, instead I am smiling, drawn into the music and pleasantly surprised by what I am hearing. Oh, and it is so simple and doable. So I bought two more sets of boards to build a double mofo. That’s going to be more work, and I am sure it will take me months to complete. I am mofo crazy now.
As many folks during COVID-19 lockdown, I was looking for projects and this one fitted the bill nicely--even though I wasn't in need of another headphone amp. The kit is very relaxing to build, even without the well-written and well-ilustrated instructions. Basically, the markings on the PCB provide sufficient information for putting it all together. Even though I have considerable experience with electronics, I would say that with patience and care, this kit could be assembled successfully by a complete beginner. I took my time to do it over two evenings, going from lowest height (diodes), to resistors, to highest parts (heatsinks). For those, my vintage 1985 Weller gun came in handy. The only little gripe is that in my opinion the headphone jack should be soldered AFTER the whole thing is assembled, as soldering it with the plastic in contact with the PCB resulted in my case in a slight vertical misalignment with respect to the front panel hole. The switch and volume knob were perfectly aligned however, so it's definitely a phone jack issue. I decided to solder the current source LED on the component side of the PCB. I might be old-fashioned, but tubes usually don't glow blue... At such low heater current, these don't glow much anyway.
I feed it from the Tape Out of a Rotel RC-995 preamp via 25' of RCA interconnect (yes!) and the sound is sweet. So far I have only used the constant current source mode. The tubes are very microphonic, but since the heater current is very low and the tubes remain cool, any tube damper would likely fix this. I haven't bothered with that yet, since the amp is on a small IKEA bed table and I don't touch it. I have used it with Grado SR225e, B&O H6, Audio Technica ATH-M50x and... a pair of Koss Porta Pro. Great kit that is easy to assemble, sounds very good and looks completely professional. Makes a perfect gift--assembled or not!
A very nice design. Enjoyed the build, was straight forward and not too pricey of a BOM. Excellent sound. Going to play around with a couple different OpAmp (almost like tube rolling).
This is my review of Pesante 5U the first thing that impresses me is the paint quality is excellent, metal is heavy and I love that the only thing that got me to confuse is the screws they are similar types and I didn't know which goes to what, it will help if on the instruction there is a small section with at least shows where those screws go by the way packing is excellent well-padded this build you see here have two 300 mm long heat sink and they look small on the case so that gives you an idea of how big is this chassis other than that I'm really pleased and happy with this chassis