I am very happy withe the result.
I replaced an ancient NAD 2150 with this and am very happy with the result. My system consists of a DIYINHK DAC driving the amp, and a pair of Linn Keilidh speakers.
The circuit boards are high quality and the assembly is straight forward. I went with the deluxe chassis, universal power supply, and the soft start/speaker protection boards. The build guide and help thread were very helpful.
I can find no flaws with the sound quality. It is very clean and clear. Voices in particular stand out. Bass has plenty of punch. Complex musical passages with lots going on remain clear. It has plenty of power to drive my speakers to above reasonable listening levels.
My compliments to Nelson Pass for the circuit design, and to the DIY Audio Store crew for making it possible.
Very good board.
I modified the F5 board to F7.
1-Cut 3 places (orange line).
2-Add 2 resistors back face.
3-Cross drain pin & sorce pin of power mos-fets.
So last night I finished my F5 amplifier.
It uses these boards and is a text book build; everything went to plan, and it sounds great.
A 300 watt Toroidy Audio Grade transformer is being used, which seems fine.
Two tips:
1 - when soldering R7 & R8 think about how you will attach your multi meter during the bias setting stage. I have them standing off the board a little, and my test hooks clipped on easily and safely.
2 - when setting P1 and P2 to zero, triple check that the resulting resistance across R5 & R6 is low not high. This could require clockwise OR anti clockwise adjustment depending on how you position P1 & P2 on the board. When setting bias for the first time, expect no change for a few turns, then a rather sudden increase in voltage.
Top quality boards. Top service and fast shipping. Build zhe F5 and Im truly happy with the sound. Thanks Diyaudio store!
Absolutely love these boards! Very nice quality board, and the layout is superb. DIY Audio never disappoints!
excellent quality thank you for stocking these boards ,can't wait to start my build *
Usual amazing quality of DIYAudiostore products. All faultless and as specified. And of course great service from the Store answering queries. Thanks.
Excellent very helpful staff when I stuff up order
As the title
easy to build, will try the sound a couple of days from now
This is a well made and well designed board that made building and adjusting the amp very easy. It is also well documented with a parts lists for the board, a schematic diagram, an illustrated build guide, many supporting threads and a Nelsen Pass article showing how everything works. It is best used with the store power supply board, which is also a well documented project. The only flaw IMO is the lack of a quick connect option for power and speaker connections. It makes disassembly much easier in case of problems. My choice would be the faston connectors which are available on the PSB board and the soft start/speaker protection board.
New boards
Everything was ok, fast shipping. Highly recommend.
Everything was ok, fast shipping. Highly recommend.
Se title. If you could charge the Danish customs fees/rates when buying (like Punkydaves), I would save 25USDs on any purchase. There exists a special shipping option, that does this.
Fast delivery, high quality components and pcb.
F5 is not build yet, waiting for big heat sink.
Really top grade PCBs, the Mosfet seems far enough for heat spreading well , I love it.
boards are of exelente quality, nice and thick.
Professional service. Product looks good.
Fast shipping , excellent quality , thank You very much !
Fantastic quality of PCB as well as amp. I've had no problems whatsoever to put it together and I honestly can say it just sounds sublime.
Very, very happy - thank you very much :-)
Great quality, short delivery time. Very happy with these PCB's.
Dear DIY-Audio,
I am in the process of collecting all the parts to build the F5 power amp that I have seen such good reviews. I ordered these parts from you to start the process though the project will take me through the winter months. The order was easy to place, requests for additional tracking information were dealt with in good time, the components were delivered in good order, thank you. Additionally I have registered with the DIY forum and I am getting plenty of advice on build standards. I am very pleased to have found you
Best regards
Neil
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
I had very quick delivery. PCBs are nice, components are premium, detailed build guide is very helpful, especially for beginners. I build the amp, and succeeded to tune it, everything went fine from the first start. Amp sounds very nice, I'm happy with it. There is a small problem, I have some hiss in both channels, I'll try to find solution in diyaudio forum. I thing adding of troubleshoot chapter in build guide can be helpful.
recieved expected quality.
thanks
greetings from Vienna
F-5
High quality pcb
Fantastic!
First Watt F5T boards arrived promptly and in perfect condition!
Andy