My first solid state amp build has delivered ‘precision’ results, just as your company logo promised. For some time I had been researching DIY solid state amps, I quickly narrowed down the field once I came across the HPA website, subsequent research told me this was the way to go. I made contact with Anthony and explained my desire to try one of his products (more out of curiosity to compare my various DIY tube amps with solid state, I needed to know the sonic difference and hey who doesn’t need another amp anyway?)My speakers are full range Lowther’s and when I contacted Anthony he suggested a dual mono amp using 2 x NXV200L R4 output modules, I.E two separate amps housed in the same case, these put out 55watt per channel so just perfect for the job.I decided to design and build my own case which turned out well...

Hi Anthony,Thanks for the quick reply.The modules have been tested and sound fantastic playing through my now very quite old Bose 901 speakers.I plan to purchase a valve pre-amp to mate the power amp to.Then my final project will be to build a set of speakers, either Jim Holtz's Statement IIs or Troels Gravesen's Seas Classics, either of which should do justice to this fine amplifier.The testimonials praising your NXV200L dual die amplifier modules are certainly justified.Thanks again and Kind Regards,John from NSW, Australia

So very happy with my NVX200 R2 based amplifier designed with Anthony at HPA. I replaced my Arcam FMJ power amp and the difference is incredible – so much detail was revealed that was previously missing and immediately all those superlatives I had read about top-end systems in magazines like Stereophile made sense. Truly a veil was lifted: attack and decay are massively improved and suddenly instruments such as piano, toms and even drummers hitting the side of the snare and woodblocks are so much, much more realistic. Other highlights for me include huge detail in the fretwork of guitar players sliding from chord to chord and almost too much noise from some vocalist’s mouths – when they are not even singing! I love it!Arguably DIY audio is not for the faint-hearted and it definitely takes a bit of time to realise, but IMHO the results are unquestionably more than...