diyAudio Store

I have an Ah! 4000 cd player. This player is a Marantz cd4000 that was factory modified. It as designed to be tweeked. It has a tube output stage. YOu can roll tubes and opamps. There was also the option to add an upsampling chip. I purchased and added the upsampling chip. The improvement in sound was remarkable. However the chip has fried and the manufacturer no longer supports the chip. I chose to upgrade the opamps with the hope of recapturing the sound quality that was lost when I had to remove the upsampling chip.... I would recommend this opamp to anyone who has the OPA604 single opamp and is looking to improve the sound..... It vastly improved the sound of mine without having to use an external dac.

housed in a beautiful wooden box for spirits this linestage gives me a detailed and warm performance at the same time. Thanks to the DIY staff for the quick and complete delivery. Thanks also to my friend Giampiero D.L. for having reported and built it to me. Now the Wayne LS 2018 drive my First Watt F4 with enough gain and authority. You know what the F4 is like: very very poli (gh) t (e) ..

Exceptional amplifier in every regard. I especially like the ability to swap front ends. This allowed me to take my system to the next level.

I have the engrave service done on the front panel and they suggest this service in order to make it look good and it did.

At the price I didn't expect too much. That is ok, since I had a general curiosity about the SP1 tube, even though I have worked with it in the past. This particular kit is easy, almost self explanatory. That's good, because there are many like myself that will get so far with something, but not all the way, and it is a PaiN to have research the crap out of something just to find a simple yes or no to a question.
So I got the kit assembled, and appreciated the quality parts choice along the way. Once done the result look s very good, and not something that resembles a kit. Finally it is the sound that makes me sigh in relief. It doesn't sound like a kit. It does however, sound like a tube circuit. In fact it sounds more tubey than most anything I have built in the past. For me, that was the goal, or at least one of the key points.
You will realize how positive this review is by the fact, I am building another one. This with a few upgrades... yes, because I can.

For me the first active crossover that i have made.
The sound is on my diy open baffles with AER 8inch and 15inch LII drivers.
It was easy to build the kit complete.
Only ambiguity with regard to the diagram was the deviating resistance values ​​supplied with the fets
otherwise highly recommended.

Very nice quality VFET boards. I am always impressed with diyaudio store quality. ( Not for current Sony VFET project by Pass- don’t order wrong boards)

The Pesante 2U Chassis came quickly after the initial Order and was received well packed and free of any damage. However, I was a bid upset when I found the extra hole in the rear panel for a fuse holder! They should NEVER have added it for a fuse holder without asking me first! I requested an IEC Socket but no Fuse Holder!

the pcb have arrived! they are of excellent quality, the shipping in italy was very fast! i can't wait to start building my f5 turbo!! thanks to all the staff!!!

A friend of mine trigged me into headphone listening. It is wonderful to be able to listen and enjoy music in the evening at real listening level.
I am a great Pass / Colburn fan and falling across the Whammy I of cause had to give it a try.
Recently I borrowed a set of Hifiman HA1000SE – whee this headphone and the Whammy really is capable putting my HD800 to the wall at a level I have not heard for a headphone before.
Very detailed dynamic sound with energy and nerve I love. It really reveals every change done in my set-up.
To bring it to best possible level I additionally used pure silver wiring, pure copper RCA connector, Jantzen Silver/Gold ac coupling capacitor, copper plates/mica underneath the output transistors, copper alloy screws, OP627 op-amp, Wima MKP10, some extra decoupling, silver solder lead and a 20Kohm 24 pole Elma shunt attenuator.
Being proud of having additional Pass Gear and to honor Wayne I used a look alike chassis – gave up using the heat sink sides.
For now it´s running 40mA bias – I have no clue how much extra performance can be gained by higher levels.
My friend with the HA1000SE is in process of building a tube-based headamp and I can´t wait to compare the amps.
Cool to be able to build something like this.
Hi from Denmark and thanks everybody for contributing to this nice project – reading the very long tread was really inspiring.

Very nice discrete OPAMP. Major improvement compared to any IC OPAMP I’ve tried.

I got two kits they were easy to build with very good online instructions all in all I’m very happy with the finished amps

It was my first DIY project and fortunately it was successful. I haven’t killed myself working with mains and very glad about that =) Some patience and accuracy is rewarded by incredible sound, depth and wide soundstage. Built with AD823ANZ and am more than satisfied with SQ – very precise, detailed but pleasant for log-time listening. I will upgrade it to discrete OpAmp – probably with Sparkos Labs’ Dual Discrete Op Amp SS3602 – very excited about that.
I believe that there was no red 0.1uF film cap (between RCA GND and safety earth) listed on the BOM on the Project’s Thread (or I have missed that), so be aware to order it. I can not see any issues without this cap, but if Wayne suggests to put it – we should… If you are using Hammond enclosure 2,028” (51,51mm) high – DON’T choose filter caps higher than 35,5mm. 40mm is too high and they don’t fit – need to replace mine =(
Many thanks to Wayne and the Community for a grate opportunity to built such a gorgeous headphone amp.

Just awesome. Pre-drilled is a great feature. I used for a single channel Alpha J (mono-block) along with top & bottom rails. Hard to find anything this size at a better value. Thanks DIYstore!

This is a very simple idea - a breakout PCB for Alps RK27 pots - but this item does the job more cleanly and perfectly than any other solution I've seen. Feels and looks high quality, easy to read, and is compact enough to not take up much more room in your chassis than the pot itself. Wish I had ordered more while it was in stock!