diyAudio Store

This 24v power supply made an amp that I already loved sound even better and gave it even more power. It now plays as loud as I could want from an amp especially when paired with my subwoofer through the speaker level inputs. I have totally fallen in love with this amp and can say it is the best listening experience I have ever had. And this is just after I paid well over $1000 for a REGA Elex-R amplifier. This amp kit outperforms my Rega amp with clarity very noticeably. I wish I could return the Rega honestly. I biased the DC output to 11.9 volts on both channels after trying it at ~ 12.2 volts. I found it sounded better with the lower number and I am loving this thing now.

Great boards, better quality than Ebay boards by a bunch! Well laid out and easy to read, gathering up my parts to start stuffing, will be ordering chassis soon, thanks a bunch!

Only a few components for a fantastic project. Easy to build following building guide . With my MOFO provides a very great stage.
Very great pleasure to listen. Yhank you!

Have bought 2 of this boards. Threw one together with parts from my parts bin, an old metal case I had almost discarded, and an LT regulator, +/- 24 VDC. I cannot believe how good it sounds. My ARC LS25 has not been used since. I am now ordering "boutique" parts and am building a better looking unit in a nice new diy audio rack case. I doubt if the new parts could make it sound even better than the first one., but I will feel better knowing I used top quality parts. Honestly though, its all in the circuit. Nelson Pass is a kind, generous, genius, designer.

When properly used these are astonishingly low noise. Very pleased.

Excellent service and fast shipping as usual. Awesome to be able to buy these in this quantity thanks to the store!

I've wanted to build an amp for a very long time but have never had the courage. I finally got the courage and ordered the ACA amp kit. I'm so glad I did! The build was very enjoyable and not as difficult as I thought. The documentation was superb. The sound and build quality are excellent. It mildly reminds me of a mini version of the First Watt J2 that I own. Paired with Zu Omen IIs it really is a joy to listen to. Highly recommended build.

I put it together in a few hours time and had no difficulty. I followed the online guide and it worked the first time I fired it up. It sounds great too. Now I need a preamp kit in the same form factor (hint).

I think there are several reasons to build this. You get a design that you know is rock solid and guaranteed to sound good, you get high quality parts, you get an excellent idiot-proof build guide and you get excellent support if necessary. I built this over the course of two evenings and I cannot recommend it enough. The feeling of pride of having built an amplifier that sounds good and looks good is worth every penny. I know it's assembly rather than true DIY, but it inspires confidence, and that is the aim.

I have this hooked up to a pair of Monitor Audio BX5 speakers and use an O2 Objective amp as a pre-amp with my phone as a source. The room is small and the 5W per channel fill it more than adequately and the sound is fantastic. Thank you to all involved in bringing this to the community, I have definitely started on a building journey!

A very enjoyable build. The video build tutorial provided excellent instruction and tips. Built the unit in one session.
Hooked up ipod through Cambridge Audio id 100 digital dock. Clear, clean and well defined music reproduction. Hard to believe that 5 watts can resolve highs, mids and bass with this much definition. Pure class A operation. Pure listening Bliss. Next move will be to hook up to an external DAC. Thank you Nelson Pass and DIYaudio.

These work very well and look great. Could not be more pleased with the project. Modifications I made were to eliminate the dc connector and switch as I control all things audio with a power strip anyway. There is nothing wrong with them, just chose not to use them. As well opted to use 1/4 inch copper strap for the "ground" connection as it made for easier connections. Likely there is no measurable sonic difference. But seemed like a better choice considering the work that connection across the positive speaker terminals and DC ground is performing. Since this review is about the chassis only. Will leave out the part about the amazing amount of audio that this thing delivers.. : ) No regrets buying these kits.

Be warned. This is a gateway amp. Once you get this built you are going to want to build another. Seriously, I've already ordered boards for an Aleph J. I expect I'll shortly start giving blood to pay for the costs of the DIY electronics I'm going to build.

On a serious note. The folks on the forum (especially 6L6) were incredibly helpful. I do not have a ton of experience building electronics. Prior to this amp I put together a pair of Bagby Continuums based on the Meniscusaudio kit.

If you can get ahold of one do so right away. You will not be sad. The continuums are not the most efficient of speakers, but coupled with the Amp (and my Jotunheim DAC) for use near field at my computer.... Sonic Bliss!

Thanks to 6L6's great build guide on DIYaudio. The sound is superb too, clearly better than the Class D amps and NAD D3020 I had been using. With the 19V power supply heat sinks do not get beyond pleasantly warm.

Quick delivery even overseas! PCBs are premium quality, really well made! Happy to start my F5 project with such a smooth transaction. Still some way to go till completed amp but it started well.
Greetings from Latvia

Coupled to speakers with with 98db sensitivity, a watt from this amplifier is simply put: astonishing! The first night we found ourselves identifying and padding vibrating pictures because of the incredibly deep bass. It is crystal clear across the audio range. It sounds great!

Well, you'd be surprised how much you might do with this no gain amplifier. You should read up on it and if it seems you'd like to give it a try you will be rewarded with a new and lovely perspective.

It will show you what you need to know about your preamp. It will show you how a speaker can be really controlled. I use mine to drive a pair of high efficiency sub woofers because of the control afforded. It is a great tool in making music and taking a full assessment of where your stereo is at. I have built the F4, F5t, F6 and the Aleph J, all very good experiences and all still in service but the one that taught me the most about stereos is the F4.

All of the kits here are a great bargain and very well made. The gift from Nelson Pass and his supporters is not to be passed up. Build this amp! You'll be educated and it'll be fun!

And here we have another great piece from the folks @ the DIY Audio Store. Holes just the right size holes for solder bleed through. There beautiful. Thanks folks and super fast shipping.

Delivered quickly, items were packaged well and scratch free. Easy assembly.

The Keratherm insulators are a great item, and our DIY store has made it very easy to obtain them.

Absolute bargain and incredible value to dollar ratio!

In discussing this kit with my buddy DaveD, and mentioning it in numerous forum posts, it occurred to me that I'd probably not written a customer review, so while a couple of years late, here goes.
I've built a few kits and from scratch electronic projects over the years - including several Bottlehead tubed amps and pres, but this was easily the simplest of them all. As for the sound - quite possibly the most transparent amp I've ever (not?) heard, and with the right speaker the modestly rated power is more than enough for pleasant listening. No, it won't break the windows, but at a price far less than some golden-eared audiophools pay for power cords, it certainly won't break your bank account either.

Can't wait to see / hear what's next from the combination of talent that put this one together.

The Pesante 3U is an excellent case. I ordered it with the baseplate, which makes it easy to attach circuit boards and other parts. Thanks!

I bought the Honey Badger, Universal PSU, softstart and speaker protection boards. They are all of a very high quality and clearly laid out so well suited to expert and novice alike. Very highly recommended.

Having purchased 2 x Galaxy 4U cases on 2 separate orders, I must say that I am very impressed with the quality of the product, their communications and also the consistently super fast delivery to the other side of the world.
First Class effort DIYAUDIO STORE..

Merry Xmas DS - Santa's already delivered for me...

Beautiful, well built chassis! Went together with a very precise fit. Very pleased!

Hello, Jason. This kit easily earned an A+ for its superb quality and accurate workmanship. The packaging of its contents is intelligent and practical. It is secure to ship anywhere in the world. The kit components are clearly and neatly separated by identity or function. The PCBs for this kit are remarkable. They are well-labeled, neatly constructed and downright beautiful too. They are fine pieces of art. I believe the assembly of this kit will be enjoyable and will also make a great-sounding amplifier. My thanks to the team who assembled this kit.

This is a high quality build item. I am looking forward to ordering the other half of the kit, the components :)

Great quality PCB. Just right for my new amp project. Simple but customisable design,and it fits neatly in the standard rack case alongside a big toroid and between the heatsinks on either side.

Ordered a Galaxy 2U w/Aluminum Cover. Price was great, shipping arrived on time. Great service! Thanks DIYAudio for setting this up.

4days to Vietnam. Thanks

Transisors arrived in good order. Well packaged in envelope thus not waking up customs employees. :-)

Awesome….I’m stunned..

I could not be more pleased with the quality of the printed circuit boards, parts, hardware, packaging, and delivery. 5 Stars across the board.

The boards arrived in less than 10 days from the USA to UK well packaged..
The quality of the boards is first rate and integrated perfectly with the heat sinks on the 5U 400 deluxe chassis from HiFi200 which has to be recommended unless you have light engineering skills and the tools.

The Pesante case is quite nice and for the price is quite a bargain. The ordering process is easy, with available options clearly indicated. Communication was great confirming each step of the order process, and the case arrived fast. If every purchase online was like this one, nobody would ever leave home.

Kind response and quick service. It's my big satisfaction!

DIY Audio provides top quality items and these PCBs are no exception. Great value for the money.