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Old 12th December 2014, 09:11 PM   #11
ijscobar is offline ijscobar  Netherlands
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Originally Posted by palmito View Post
Sorry guys. It is finished and has been burning in for about a month. I will post the final photos and a review in the next couple of days.
Looking forward for your review!
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Old 18th December 2014, 10:45 AM   #12
palmito is offline palmito  United States
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Another NXV-500 r2!
Default Amp running...

After completing it and realizing how big it ended up being, if you have the money, it might be easier to build two mono amps. However, the extra cost of going dual mono is not trivial.

In terms of power and its ability to drive my Acoustat 2+2 electrostatic speakers I have no complaints. The amp drives them very well! I drive the speakers to high volume levels without making the amp sound stressed. The bass is solid and well defined, the midrange clear, good presence and very smooth highs. The amp has excellent detail. But my favorite improvement bought about by the amp to my system is in imaging. The sound stage didn't get much wider than it was before, but it has gained depth and most importantly, all the instruments are clearly delineated and have space around them, things just float in space very nicely. Listening to some hires music really brings out the imaging capabilities of the amp (specially at night when all is quiet). Percussive elements (bells, cymbals, etc.) sometimes really do sound like they are in the room. Vocals have also benefited from the added detail. All in all, I'm very happy with the amp.

I used SumR toroids for all three transformers the amp has and I'm very happy with them. They were not cheap but not overly expensive either. They are dead quiet and very well built. I would highly recommend them. The amp itself is also dead quiet. Startup and shut off produce no thumps or noise of any kind. I have not tried using the amp's balanced input, all the listening has been done using the single ended inputs.

Now the caveats... my previous amp was a PS Audio 200c, over 25 years old, and a 250 watt class D amp (with a linear power supply). So I have not compared the amp to anything high end and modern in my system. I will be loaning it out to friends when I travel next year so I'll post their impressions when they give me feed back. However, my system now sounds good enough I don't have the desire to build another amp for a while. The nxv500 sounds great and I just want to enjoy my music for now!

It does need a couple of weeks of burning in. When I first played it I was a bit disappointed, the imaging and sound improvements were there, but not like what they are now. All aspects of the sound have improved as length of usage increases. Of course, it could all in my mind that after a few weeks of listening to the amp I have grown to like more the way it sounds...

Highly recommended!

Thanks Anthony!
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Old 18th December 2014, 11:02 AM   #13
ijscobar is offline ijscobar  Netherlands
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Nice review! I agree with most things Coming from Hypex UCD400AD amps the improvement was there from the beginning. It only got al little bit better after a while. The soundstage is indeed the big improvement.

A question about your amps. I do not use the NXVolt to feed the front end separate. For the rest I use more or les the same set up as you do: dual mono in one chassis. Did you run the amps without the NXVolt first? How did that sound? Also, why did you not go dual mono for the NXVolt?

I am still very much in doubt about using the NXVolt. When going dual mono the two extra transformers and two NXVolt's just take up a lot of space. I'm not 100% sure all will fit in my chassis. Not to mention the money involved.
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Old 18th December 2014, 01:42 PM   #14
palmito is offline palmito  United States
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Another NXV-500 r2!
Quote:
Originally Posted by ijscobar View Post
The soundstage is indeed the big improvement.
Yes, that is the thing I am enjoying the most, specially with hires source material.

Quote:
Originally Posted by ijscobar View Post
Did you run the amps without the NXVolt first?
No, regrettably I have not. But, I'll try it in the future, after I listen long enough to it configured like this and I'll report.

Quote:
Originally Posted by ijscobar View Post
Also, why did you not go dual mono for the NXVolt?
Cost! But I made the box extra big so that in the future I might consider it. But I need to answer your question above first, "is it worth having the NXVolt at all" in my system? I guess if it proves one doesn't improve much it will not be worth the expense of getting two, but if one does improve the sound then two should be better?

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Originally Posted by ijscobar View Post
When going dual mono the two extra transformers and two NXVolt's just take up a lot of space. I'm not 100% sure all will fit in my chassis. Not to mention the money involved.
My feelings exactly. I think my chassis would fit the extra boards, I might have to move the trafos "upstairs" and put all the ps boards below, but I could probably make it work. But as you said, I need to determine if it is worth the extra expense.

BTW, I forgot to mention in the review that Anthony's support is very good. He answers questions quickly and thoroughly and doesn't seem to get tired of customers constantly asking silly questions...
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Old 18th December 2014, 01:50 PM   #15
ijscobar is offline ijscobar  Netherlands
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Thanks Palmito!

I agree totally about the support Anthony is giving! A big, big compliment for him being so helpfull!

I would be very intrested to hear you or other owners about the pro's and cons of using the NXVolt.
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Old 19th December 2014, 02:50 AM   #16
emyeuoi is offline emyeuoi  Italy
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Another NXV-500 r2!
Hi palmito... you did a really great job and a great review.Thanks!!!
May be you can show us the schematics? Or a link where we can find it?

Thanks and Regards,
Enrico
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Old 19th December 2014, 07:48 AM   #17
ijscobar is offline ijscobar  Netherlands
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Or a link where we can find it?

Thanks and Regards,
Enrico

The link: Holton Precision Audio | Sound by Design
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Old 19th December 2014, 01:25 PM   #18
palmito is offline palmito  United States
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Another NXV-500 r2!
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you can show us the schematics?
Hi Enrico! Sorry, I never got schematics for any of the parts. I think they are proprietary designs and Anthony doesn't give those out? You get wiring diagrams and board images with the connectors, but no schematics when you buy the parts. At least I didn't!
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Old 19th December 2014, 02:23 PM   #19
ijscobar is offline ijscobar  Netherlands
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Me neither... I'm pretty sure Anthony is the only one with schematics.
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Old 19th December 2014, 02:27 PM   #20
emyeuoi is offline emyeuoi  Italy
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Another NXV-500 r2!
Thanks ijscobar and palmito for the replies... I will give a look in the link you send me and I am sure I will be back with some questions

Regards,
Enrico
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