• WANTED: Happy members who like to discuss audio and other topics related to our interest. Desire to learn and share knowledge of science required. There are many reviews of audio hardware and expert members to help answer your questions. Click here to have your audio equipment measured for free!

Vera Audio P400/1000 Review (Amplifier)

Rate this amplifier:

  • 1. Poor (headless panther)

    Votes: 1 0.4%
  • 2. Not terrible (postman panther)

    Votes: 7 2.8%
  • 3. Fine (happy panther)

    Votes: 52 20.5%
  • 4. Great (golfing panther)

    Votes: 194 76.4%

  • Total voters
    254

Gorgonzola

Major Contributor
Forum Donor
Joined
Jan 27, 2021
Messages
1,053
Likes
1,436
Location
Southern Ontario
It's nice to see high-power amp and a reasonable price the should relatively low, benign harmonic distortion, (mostly 2nd & 3rd).

I thank Amir for including the graph that shows THD+noise across the frequency spectrum; I suspect the there are many devices with similar SINAD but difference across the spectrum that would differentiate one from another.

index.php
 

tomtoo

Major Contributor
Joined
Nov 20, 2019
Messages
3,750
Likes
4,850
Location
Germany
It's nice to see high-power amp and a reasonable price the should relatively low, benign harmonic distortion, (mostly 2nd & 3rd).

I thank Amir for including the graph that shows THD+noise across the frequency spectrum; I suspect the there are many devices with similar SINAD but difference across the spectrum that would differentiate one from another.

index.php

Its a clean amp up to ca. 500w.
 

YSC

Major Contributor
Joined
Dec 31, 2019
Messages
3,306
Likes
2,713
We are living.... Wife is still in pain yet she is needed to sort through all her stuff that got flooded. Thanks for the well wishes.
nice to hear that, but any pain need to be treated early or else it will not go well in the years coming especially you are over your 30s.

back to the review, this is a really nice looking and performing amp, especially the channel matching is really nice as the 3db SINAD difference won't be audible but the channel imbalance will be surely audible. but looking back at the price... can I say I love the powered monitors?
 

sarumbear

Master Contributor
Joined
Aug 15, 2020
Messages
7,604
Likes
7,336
Location
UK
I looked, read, looked again, I was about to give up that, shame, there is nothing I can criticize, the horror! :)

Then I found it!

I don't like a major set-up setting like stereo/bridged to be treated the same as operational settings like gain and that they are placed next to each other. You use the bridge switch once the amplifier is connected but you adjust the gain controls later on. It is entirely possible to change the amplifier mode by mistake if you are trying to adjust the level controls standing in front of the amplifier but reaching the knobs at the back.

Screenshot 2022-01-22 143515.png


It would have been perfect if the bridge switch would be made different and difficult to be used by mistake. A slider switch with a recessed tag is the best for such settings. Example below.

MAR_4021-0512_01.jpg


Needless to say. I am nit picking. I voted Great. However, excellence is not easy to achieve.
 

PeteL

Major Contributor
Joined
Jun 1, 2020
Messages
3,303
Likes
3,855
I know it is very personal, but to me, that power button in that position in 2022 screams DIY. Don't kill me, i repeat, personal taste.
I tend to agree, we are in the same price class, and power class here with the NAD M23 which uses the higher end Purifi modules and an industrial design on an other level. It makes this a hard sell.
 

sigbergaudio

Major Contributor
Audio Company
Forum Donor
Joined
Aug 21, 2020
Messages
2,894
Likes
6,212
Location
Norway
Hi,
Interesting test. I had an experience with hypex modules back in 2005/6 implemented by a great electronician. The project was abandoned for the simple reason that after 10 minutes you could't listen any more. Enormous listening fatigue ( not with the class d Topping pa5) . It is very probable ( i hope so) that from than hypex evolved but i reccomend to Armirm an extended listening test to confirm his judgement..

Since that's 17 years ago, I suggest you listen to a current Hypex amplifier before commenting. This is just nonsense with regards to current Hypex amps.
 

doug2761

Active Member
Forum Donor
Joined
Mar 23, 2020
Messages
155
Likes
273
Interesting test. I had an experience with hypex modules back in 2005/6 implemented by a great electronician. The project was abandoned for the simple reason that after 10 minutes you could't listen any more. Enormous listening fatigue ( not with the class d Topping pa5) . It is very probable ( i hope so) that from than hypex evolved but i reccomend to Armirm an extended listening test to confirm his judgement..

I've heard pundits make these sort of broad-brushed claims in a lot of places. From my experience, those claims are complete BS in the context of these Hypex NC amplifiers. Just take a look at that multi-tone test and use a bit of rational thought to overlay that on the performance envelope of your loudspeakers and listening room. Does one really think that these Hypex amps, with their verified and validated performance envelope demonstrated in this review, are doing anything to the music signal that will be audible in any reasonable home application?

I'm writing this as I listen to my new NC252 that sounds just like my NC400 mono blocks which sound as good or better, and much more efficient, than my MC402. In my experience, these broad-bushed negative claims about class-D do a major disservice to audio enthusiasts looking for state of the art performance at accessible prices. In the context of this amp and the other Hypex-based amps that this site has reviewed, those claims have been proven to be baseless.

There's really good news here. One doesn't need to spend exorbitant sums on exotic designs to get the best attainable performance that is demonstrably audibly transparent.
 

Armand

Member
Audio Company
Joined
Jun 25, 2018
Messages
96
Likes
321
Anyone able to calculate what input voltage is needed for 12dB to be selected; or what gain one can use with a 4Vrms input? I could be wrong, but I’m calculating ~14Vrms input for 12dB gain (what Hi-Fi DAC does this other than the Benchmark?) and for ~4Vrms I’m calculating a gain of 23dB (so the 24dB setting on this amp can be used).

Company measurements show that distortion doesn’t kick in drastically till ~700W. Would gain setting have that much of an impact?

Do gain settings differ for bridged mode?
Gain setting does not impact maximum power. Other than of course that lower gain setting requiers higher input voltage. Our experience is that the industry standard of 27dB gain is too much in many systems. The result is that noise from the sources are amplified too much, causing hiss in the speakers. Lowering the gain on the power amplifier will always result in less hiss in the speakers and with todays distortion free high output from many sources a gain setting of 18dB or 21dB is if often a much better option.
The 12dB option is for customers that have very sensitive speakers. To reach full power in that setting a 13V input signal is required.

In bridged mode the gain is 6dB more than indicated on the switches. So if both are set to 15dB, the effective gain will be 21dB. They can be set to different gains settings as well, so that if one is 15dB and the other is 18dB the bridged gain will be 22,5dB
 

maty

Major Contributor
Joined
Dec 12, 2017
Messages
4,600
Likes
3,181
Location
Tarragona (Spain)
Vera Audio Class-D Amp Build Quality


index.php

index.php

index.php


index.php
 

jools

Member
Forum Donor
Joined
Oct 9, 2021
Messages
63
Likes
124
Since that's 17 years ago, I suggest you listen to a current Hypex amplifier before commenting. This is just nonsense with regards to current Hypex amps.
Some people who have spent a lot of money on other amplifiers - such as a few which have been reviewed here recently - might feel considerable pain and distress if they heard a current Hypex.
 

Armand

Member
Audio Company
Joined
Jun 25, 2018
Messages
96
Likes
321
@amirm Perhaps you can make an exception, given how well this product measures? Bit of a shame if you don't cover some of the important features such as variable gain and bridged mode. After all, they add to the high cost.
Accuracy in the variable gain is something we have paid attention to. Personally I hate it if the left/right gain balance is altered when changing gain settings. Potentiometers are the worst!
We use dual Susumu 0,1% precicion metal film resistors for all gain settings per channel. (A total of 28 resistors).
I have measured the distortion in many resistors and the Susumu metal film resistors are the best.
Here is a picture of the input bufferPCB with all the gain resistors.
1633218134409-png.752445


Every amplifier is run through a test where all gain settings are controlled before delivery. The maximum left/right error is 0,01dB on all gain settings.
I can see that Amir measured 0,02dB. I suspect that is due to small variations in cables and measurement setup. When I run the gain matching test I use a split cable to ensure the input is 100% equal on both channels.
The maxumum gain error from the abolute gain is 0,05dB.
If for example the gain switches is set to 21dB the gain *can* be 21,05dB on both channels, but the left/right error will never be more than 0,01dB

When it comes to bridging we can really just look at the stereo 4 Ohm performance. With an 8 ohm load the power performance will be exactly the same since both outputs will "see" the same load. The power supply will also "see" the exactly same load.
Usually the THD is even better in bridged mode since the unlinearities in the two NC500 modules will cancel each other.
 

Jim Shaw

Addicted to Fun and Learning
Forum Donor
Joined
Mar 16, 2021
Messages
616
Likes
1,168
Location
North central USA
Put a couple of blue meters on it and voila! Double the price.
1642870567689.png
 

olivier salad

Member
Joined
May 18, 2020
Messages
70
Likes
48
First time to hear “greenflation”. What a manipulative neologism!
Not saying you’re being manipulative.
Let’s face it, if you are manufacturing in a high wage country, taking care for the environment (e. g. like Genelec) and not using slaves as work force you have to ask for a higher price. That’s totally justifiable in my opinion.
Referring to Chinese factory workers as "slaves" is nothing but racist. BTW, the actual Hypex modules are made by "slaves" in Malaysia.
 

ROOSKIE

Major Contributor
Joined
Feb 27, 2020
Messages
1,944
Likes
3,558
Location
Minneapolis
I tend to agree, we are in the same price class, and power class here with the NAD M23 which uses the higher end Purifi modules and an industrial design on an other level. It makes this a hard sell.
Well to be fair the NAD is almost 50% more at $3500.
They are still likely to be cross shopped but for me the NAD wouldn't be a no brainer.
I think this amp under test here performed fantastically.

Edit whoops, thought it was 2394, not 2934 oh well...

close to AHB2 performance for AHB2 money- not bad
Well again to be fair here in USA the benchmark is several hundred more and well less than half the power in stereo.


Edit whoops thought it was 2394, not 2934 oh well...
Referring to Chinese factory workers as "slaves" is nothing but racist. BTW, the actual Hypex modules are made by "slaves" in Malaysia.
Slaves is a pretty loaded word and ought to be respected as such. That said, many factory workers in just about any country are not paid anywhere near as much as the folks who consume the products they produce are.
There is no debate about that.
I don't think many folks looking to buy a $2000+ USD audio amp could last a week in very many factories.
As the saying goes "when you drink the water remember the people who dug the well".
At the very least we can remember how much work goes into all of these products reguardless of what country the factory is in.
 
Last edited:

AdamG

The effort is the “tell” of honest engagement…
Moderator
Forum Donor
Joined
Jan 3, 2021
Messages
4,911
Likes
16,280
Location
Reality
My hand is on the Delete Post and Warn Poster Button! Go ahead and make my Day…..;)

On Edit: I guess I have to clarify since two members raced each other to see who would be first to get a Warning! No Political content of any kind permitted. Sheesh :rolleyes:

Refresher reading: Rules for Review Threads
 
Last edited:
Top Bottom