Could Class D really be that good?

Try a Douk E6 in front of it with the upgrade that is referred to in certain posts.

I do think the Budget Class D and Budget DHT Pre will find a very pleasing synergy.

I put a few friends onto the E6, and one is after a period of trial, now seriously considering it for being a replacement for their Django TVC. This was unexpected, as I thought of the E6 as a very affordable dipping of ones toes into a DHT type Pre Amp.

The E6 was only presented to the group of friends, as another friend in the group, who is a very competent EE, has investigated quite a few £000's in another UK based EE's DHT Pre Amp Design, that was getting good appraisals during the  Honeymoon Period of its use. 

Not heard the DHT yet in any of the types now available, but do know the report on the UK based EE's design has claimed it has transformed SS Power Amp's relegated from the Top of the Listing for their favour to a whole new level of presentation that are very attractive when experienced.  

Bear in mind a fully loaded PCP for a Purifi Design as a DIY Build / Commission Completion can be acquired for between £300 and £600.

I would think that if the casing is not OTT on the aesthetic, the end Amp will be close to the £1K pricing for the upper cost model, even with Pure Copper RCA / XLR used and PC Triple C used as Hook Up wiring.

When assembled in a Casing there is little to compete, unless another wad of £0000's is spent. 

I have also made known on this forum in another thread about a Import Chinese Origin, Four Box Modular Class D Power Amp compared to a £50K Soulution Power Amp on a £200K system, or £150 400 system with the Import Amp.

The system owner was completely bamboozled by the Import Amp being such a performer, the Soulution out performed it, but at £49 600 to attain the difference on offer. For the individual who was with the experience of the comparison, that becomes a very difficult decision to even consider.

Even more painful, is that on the same occasion, a Neurchrome 365 at approx' £2K built, at times with certain tracks  was much more attractive than the Soulution.   

@thecarpathian To acquire an answer to this inquiry, will take a little time as I am out of touch with the person who presented the Power Amp.

Plan B, I have trawled the mails of the Amp owner on their preferred forum, I am 99% sure the Link in the follow up post is the Amp I was able to be demo’d. ( I'll Post Link separately incase this post gets dumped if the link is refused). 

What I do know is the Amp’s were a Punt Purchase by an individual who is a adept EE and has a lot of DIY Builds under their belt. Also the Amp was purchased to be part of OB Speaker DSP Amp assembly.

The Amp was in the owners view so impressive for the outlay, the owner wanted it to be experienced as a Monoblock for the entirety of the Frequency Range.

I also know the Amp’s in question had a couple of changes to the original schematic/topology, as a few components were swapped for parts the Amp’s owner had in their spare parts collection. I recollect talk of a change in the Power Supply Module. I also know through the discussion had, that the changes were not expensive or complex and thought of as quite simplistic.

Whilst Trawling the Amp Owners mails, I have learned the Owner is now a vociferous advocate of the Neurochrome 686 Power Amp’s, I my self can not disagree, I have very positive indelible memories from all experiences had, where these Amp designs are used.

The Amp Owner makes the statement ’World Class for Extremely Sensible Monies’. To make such a statement is of interest, as one very good friend of this person, is the owner of LDA who does make World Class Amplification.

The first time I read the asr Link is today in the last few minutes, I am glad my description of listening to this Amp design, supplied Signal from a Vinyl Source and Soulution Pre Amp', seemingly suggests the measured performance is able to produce sound that is quite attractive to some individuals preferences for a produced sound.

Some of the Neurochrome owners I know, and have been instrumental in their becoming users of Neurochrome designs are now, seriously investigating (actually building) up to date designs from Purifi, which is the evolved design from Bruno Putzey. 

I for many years have been very very socially active in relation to my interest in audio. My times as a exhibitor to the general public/ audio enthusiasts has created an experience where my exhibiting space has been endlessly full for the duration of the event.   

With this today as being one fundamental attached to my Hobby, I end up travelling a lot with equipment.

Certain equipment especially the Valve Based design are very fragile, or in the case of the owned Power Amp's (Stupidly Heavy), for managing at my age and being with arthritic ailments.

In the past five years, I have been slowly learning about audio equipment, that is extremely impressive to my preferences, non-Valve and much lighter in weight.

In any of the Amp's I have referred to in this Thread, I have found all that I require, when I retire the Valve Amp's.

Additionally my research has also assisted with my discovery of a system, except speakers that can be transported in a Wheeled Suitcase. This is quite something for somebody who really does like to go all in with their support offered for arranged social events in relation to Audio and Audio Enthusiasts.

I have no doubts if I were to change direction and utilise alternate Power Amplification, my exhibiting a system publicly, will still create as much interest as has the other times experienced.

Note: There are routes into exceptional quality Power Amp's capable to stand toe to toe with respected Brands. The cost associated with getting to this place is not too much.

If a Manufacturer of a Amp, had the BOM of the Amp's being referred to, there is no real way of knowing the final costing to be the RRP.  Certain Brands with a larger profile in the market, are possibly gong to add 10 - 20 x in uplift costing,  as a reasonable conjecture. 

I have it on good authority the Company in the Link to follow, offer a very high quality Class D Power Amp at reasonable monies. This is an Amp' I have recently been demo's for quite a few hours as a debut listen.

@lanx0003 In the not too distant, I will put up a link to a Build of the latest Purifi design I have linked previously within this thread.

There are already some build tweaks already known for this design and these are being incorporated into the build I am following.

When all is in use, I will ad the link to the build thread.

This as a design will be cheaper than the Audiophonics Option and be a few steps forward in the design choices. It may even be cheaper as a commission build, if the DIY idea is not appealing.

I have heard Active Driven OB's with a configuration for Amplification with similarities to the method suggested by yourself.

The OB's although with 4 Drivers and a Amp for each Driver with Class D for the Lower Frequencies, has been the best Speaker Array heard in a unusual venue.

I would strongly suspect if heard in the home set up, they may be the best Speakers experienced over multiple years.

I made it known recently, that very recently, a friend who is a EE, has bought into a DHT Pre Amp Design, and in using this with a Neurochrome Amp, it has blown them away with what is on offer. I am yet to receive an Demo', but some of the Local HiFi Group have, and they are thoroughly impressed with the experience had.

I myself am still remaining thoroughly impressed with the Pass Korg B1 design for a DHT Pre Amp, especially after it has a few well known circuit mod's added.   

@tubeguy80 DIY Audio Forum, will offer up extended info from builders on these Amp Designs, Bruno Putzey is  a point of reference.

Whilst Discussing OP Amps, the OPA 1656 is one known to be selected for use in place of other OP Amp's.