View Full Version : massive audio nano amplifiers NX5 (NX4 + N2) Review

12-02-2010, 08:51 PM
I have had these a few months now.

First up the usual packaging. The box is nicer then the usual car audio box we see. It opens up like a treasure chest and the packaging is simple with just a bit of foam to keep the amp secure.


When looking at the amp, I find it to be a particularly handsome design. Simple black anodized heat sync. I love these small foot print rectangular shape amps. A lot of people like the square shape that fits under a seat, but I find if you want to hide an amp anywhere else, the rectangle is the way to go.


So lets look at the specs.
120 x 4 rms @ 4ohms(ClassAB) and 800rms x [email protected] 1 ohm(classD).

That's a lot of power for such a small package. I included the audio precision PDF files for the NX4 and the N2 (the NX5 is basically those 2 amps in the same chassis). As you can see it's pretty much right on. Of course the 2ohm rating for the multi channel part is more of a "peak" rating and is not realistic at all, however I don't particularly care about that since I use them at 4ohms.

Lets look at the guts, we all love that.

I was a bit worried about how these would end up working day to day, being class AB and such a small chassis.These amp I am told have protection if they overheat. I have not witnessed overheating though so I can't talk about that part. I didn't have them during the hottest part of the summer. They do get hot to the touch after a bit of playing time. I can easily tell what side is the AB side and what side is the class D hehe.

So what are my impressions? They are SMALL the biggest is the 5 channel at only 15" x 5.5" x 2.1". Ever since small foot print amps have been made available I go crazy for them. I have used -in the small amp category- sony xm-4s and xm1s as well as the planet audio BB75.4 and 175.4 and I prefer these by far. The nx4 and nx2 are ridiculously small, one could easily fit one per door bridge for dedicated midbases. The noise floor is lower then the sony and the PA amps, and I didn't find those bad in the noise department. I have not had any engine whine either. This makes me a happy camper.

Power wise,subjectively I feel I am getting more power then with the sony's (rated at 50 x 4) and similar to the BB amps(140 x 4). OF course the PDF's show exactly what one gets when buying these amps. Rarely will a company provide this type of info on their products.

I also got the stacking hardware for these and the base knob. The RBK is a boost centered at 50hz that I have not used yet and I haven't tried the stacking yet either. These went right in the car and were put to good use.

The xovers and gain knobs have detents or clicks which I really like. Unfortunately massive has not "normalized" or averaged the clicks to set points. So when setting them one has to go by ear as it really is a guess. One thing I don't like is the front channels on the nx5 and nx4 can only by all pass or high pass, no low pass and the rears can't be band passed.... but that's nitpicking as most amps don't offer this especially in this regardless of foot print. Also the RBK and stacking kits have to be bought separately.

I started originally with these bridged to the massive ck6 stage 3 set and boy it got loud and those mids shook the car without problems. These tiny amps deliver the goods.

Usually I am always looking at changing amplifiers, trying to find better or smaller. But really, it doesn't get any smaller and they are powerful enough to satisfy my requirements fully (And then some). I bought a pair of the NX5's and they take up almost no room and I get a total of 10 freaking channels in a 15" x 5.5" x 4ish" foot print that can be stacked vertically or horizontally.

I really didn't think I would be able to get such a nice small foot print 5 channel with a powerful sub channel, but these fit the bill nicely.

Big thumbs up on my end.

Also a note about the customer service at Massive audio. Their forum is full of positive experiences , but I have to say that it is the best service I have ever received bar none. Not to mention they have some of their techs on their sites forum to give advice and opinions.

-Handsome, simple design (These are really nice in person)
-Tiny foot print
-Big power
-bridgeable (some small foot print amps aren't)
-1ohm stable (sub channel) I know many prefer not to run at 1ohm, I personally run them at 2ohm and feel I get enough power, but I like the flexibility aspect.
-optional base knob
-All the latest protection circuitry one would expect
-The speaker terminals can handle big speaker wire and the metal "clamp" and screw can't be completely unscrewed making it easy to stuff huge wires in there.
-All power and speaker terminals require the same Philips head to tighten and un-tighten.

-limited xovers
-amps don't come with RBK
-2ohm rating

***Some of you might be looking for the supposed audio precision power output pdf's I am refering to. Unfortunetly CA doesn't allow big enough PDF files so if you want to see them, mosy on over to DIYMA.

12-02-2010, 08:56 PM
Nice looking amp.

Titus Pullo
12-12-2010, 11:48 AM
anyone else have any feedback on these amps?

01-02-2011, 09:48 PM
HEre are some more pics.


All aesthetic aspects of the amp are nice.


HEre you can see the terminals where it is particularity easy to use , you can't unscrew the screw and square metal plate completely since there is a plastic part keeping it from popping out completely, so feel free to unscrew it completely and jam in huge wire. Not using disconnects has never been so easy hehe.

8awg wire

Below you can see ALL terminals use the same philips screw... I am in love.
Of course one never wants to over tight since the it seems like it would be challenging to swap out new screws.

01-07-2011, 01:57 PM
Excellent amps and for the small size people are like what ever. But these are worlds better and do rated power!!! I sell Massive Audio and we have a guy here locally that did 160.3db with 4 of the N4 mono amps and only 1 extra battery in a MECA db show... Closest guy in his class was using all Digital Designs ( love DD also ) he got 160.1 with 10 batteries.

The NX series are sweet Class A/B no junk here fellas.

03-08-2011, 11:03 AM

new member. guys i just bought a new massive audio n4 the amp is rated at 2000 watts rms but the power input is only a 4 guage is this possible? also this is a cea 2006 compliant amp i just called cea and was told they dont test every member that carries the logo does any body have any info?


03-10-2011, 07:53 AM
Yes CEA certification is really a self certification.
4awg is fine for short runs of wire. So usually you will have a big run that goes to a distro block and then short runs from that to your amp.

06-19-2011, 07:36 PM
I have a Massive Audio N4 running my subs (4 12s) and a NX4 running my tweeters (only using half of the amp so far), and these amps are great.

They put out rock solid power, are efficient, stay relatively cool even under the seat of my Avalanche (they get warm, but stay much cooler than any other amp Ive had under there), and sound great. I can beat on them as long as I want with the volume cranked all the way up and they never go into protect.

Id definitely buy more of them.

06-19-2011, 07:47 PM
MA makes pretty decent stuff for being a low end company.. im impressed with alot of there stuff, and i sell quite a bit of it..

06-26-2011, 08:55 PM
Some of us have been wondering what the stacking looks like, well wonder no more!

First off to stack same type amps you need 4 N-END blocks. IF you have different size amps then you can buy length equalisers instead of these ends so you can stack them to. Neet.


So the end caps are made of the same anodized black alluminum as the amps. So they look great. The manual says they add a few inches of lenght but really all it does is somewhat hide the wireing . When we take into account that the amps will have some wireing sticking out of them, these end caps don't add much if any length.

2 simple screws per side and a small metal plate is all it takes to secure the end caps.


This is nice

These amps are so **** IMO


At first I thought I would secure them with screws through the end cap holes but as we can see it doesn't line where the terminals are. As it turns out it's best that way as it would'nt look nice.

To secure them simply mount them through the regular mounting feet and it holds nice and you can't see the screws. The only thing is you have to provide the mounting screws. But of course since you can stack more then a pair, getting your own custom lenght is only a few cents cost.

HEre they are stacked and a bit dusty




Stacked from above view

06-26-2011, 08:57 PM

06-26-2011, 09:00 PM

07-02-2011, 11:54 AM
Can't wait to install mine

07-06-2011, 09:58 PM
I have an NX5 on the way. If it is good enough for me, I will go from an amp rack that is 12.5" x 40" to something that is roughly 6" x 15".

Lastly, thanks for the review.

07-14-2011, 10:00 AM
After reading this thread: Massive Audio NX5 Going Into Protection - DIYMA.com - Scientific Car Audio - Truth in Sound Quality (http://www.diymobileaudio.com/forum/general-car-audio-discussion-no-question-dumb/107097-massive-audio-nx5-going-into-protection.html) and talking with one of my friends who is having problems with his NX5 going into thermal, I sent mine back to Sonic Electronix.

07-16-2011, 08:42 PM
No over heating issues for my paire.

10-04-2011, 04:32 PM

new member. guys i just bought a new massive audio n4 the amp is rated at 2000 watts rms but the power input is only a 4 guage is this possible? also this is a cea 2006 compliant amp i just called cea and was told they dont test every member that carries the logo does any body have any info?


That number is probably peak watts or max power which is a useless number. You want to look at the RMS output info. I think your definitely ok with 4 gauge and the whole CEA ratings are still a joke considering the process the follow to get that number. Using test tones isn't very effective to acquire a power rating considering the amps are used to play music! (Unless used in spl setup for burp tones)

10-04-2011, 05:05 PM
This is strange these people are having problems. I had 2 N4s for my subs and a NX4 for my tweeters, and I never once had the amps go into protect. I would play them under the seat of my truck (almost no ventilation at all) for 30 minutes full tilt (55/62 on my 880PRS) on a 100 degree day here in Florida and while they would get hot (obviously, any amp would), they never once went into protect for any reason at all.

In my experience these are built like tanks. I abused them by playing the crap out of my stereo under the roughest conditions for longer than I should have and they didnt give me even the slightest peep.

03-04-2012, 09:29 PM
I have the N2 and have never had an issue with it getting hot. The subs hit so hard my eys radle! I love the amp.

Bettr n' Revrse
03-04-2012, 09:34 PM
They are different now anyway...

03-05-2012, 04:03 AM
They are different now anyway...

No longer doing rated, and questionable QC, right?
At least that seems to be what I have been picking up on from the grumbling....

Bettr n' Revrse
03-05-2012, 04:18 AM
No longer doing rated, and questionable QC, right?
At least that seems to be what I have been picking up on from the grumbling....

Not sure about that but from what I have seen looking into them they have changed since this tread...

03-05-2012, 07:31 AM
Good change, or bad change?
Was giving some consideration to buying one, so expound, pls, mang!

Bettr n' Revrse
03-05-2012, 07:32 AM
I think for the better... They do still get fairly hot though but that's just what to expect with a mini amp...

03-05-2012, 07:41 AM
Aiight, tks.
Now I will have to try to track down where I read the rotten review(s) I am recalling....

03-05-2012, 08:51 AM
The rotten review was mine. Massive Audio NX4 and NX5 - My review - DIYMA.com - Scientific Car Audio - Truth in Sound Quality (http://www.diymobileaudio.com/forum/member-reviews-product-comparisons/116445-massive-audio-nx4-nx5-my-review.html?highlight=massive+audio)

I Like Waffle
03-05-2012, 08:59 AM
How many people will be butthurt when you start seeing audiopipes copy of this amp?

03-05-2012, 09:00 AM
Yep, yep!
Knew I was recalling at least one, and this was it. :fro:

Had already been doing fruitless searches to try to find it again. Thanks for heading me back to it!

03-17-2012, 01:57 AM
I have the nx5 and did not notice the sq issues.

I do not believe the output rating.

For $300, it is a good buy compared to other 3 / 5 channel options.

Bettr n' Revrse
03-17-2012, 02:02 AM
I have the nx5 and did not notice the sq issues.

I do not believe the output rating.

For $300, it is a good buy compared to other 3 / 5 channel options.

New or old? Need to keep in mind this is from 2010...

03-17-2012, 07:02 AM
Interesting review, LOL

03-18-2012, 02:08 AM
300 bnib shipped from dealer.

03-18-2012, 09:48 AM
300 bnib shipped from dealer.


Nice price on a NX5... I know a guy using Massive amps on a Morel Supremo set, over $2000 setup and they are fantastic... nothing wrong with them, either you know what your doing or you dont.

Do it right and it will sound good.

03-20-2012, 03:43 PM
Actually, it was $325. But still, I am not sure why you are comparing it to the PDX, which is much more expensive. This is a pretty good amp. I have turned all the filters off and use my HU for that. It does seem to get hot but I haven't found it negatively effecting output. So far, I still give it a thumbs up.

Bettr n' Revrse
03-20-2012, 03:49 PM
Really hope people rear the date on this... I'm not even sure they are made in the same factory now lol

03-20-2012, 03:53 PM
I am commenting on the ones currently made. I am not sure if someone in the market for this amp could get ahold of the ones made in the original post. The pictures still reflect what the amp looks like, minus the inclusion of end caps. Mine did not come with them.

02-18-2013, 11:25 AM
On my second NX5 and it still overheats and goes into protect. I have tried everything. I think I am putting to much power to it. Pisses me off.

07-26-2013, 10:38 AM
Mine rolls back the power\volume a bit... has never shut down. But I only listen to maybe 30 45 minutes at a time.