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Reload Thread: My test: PPi phantom 900.4

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    TaylorFade's Avatar
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    My test: PPi phantom 900.4

    Usually I just take the manufacturer's word for it on highs amps, but I just love my little PPi 900.4 and I recommend it all the time so I decided to test it and see if she is really doing the clean power.



    This will be short and sweet. I didn't crack it open or take pics of the controls or inputs. You can see closeups of them here... Precision Power PPI P900.4 (p9004) 4-Channel Phantom Car Amplifier



    The amp is active capable and claims 145w x 4 channels @ 4 ohms in a tiny footprint. For less than $200. That's an awful lot of amp for the money. Let's check it out.



    From the manual...







    RMS Power Rating (14.4V):

    4 ohms: 145 watts x 4 chan.
    2 ohms: 225 watts x 4 chan.
    Bridged, 4 ohms: 450 watts x 2 chan.

    RMS Power Rating (12V):
    4 ohms: 100 watts x 4 chan.
    2 ohms: 150 watts x 4 chan.
    Bridged, 4 ohms: 300 watts x 2 chan.

    Yes... we will be getting to that big bish, but let's test the little one first. That's a PDX-10k, in case you don't recognize it. I also think it's hilarious that this is likely to be someone's setup. That teeny thing on the fronts and that monster on the substage. All SQ and ****.







    Setting unloaded. A lot of people feel like this is useless, but I like to see what an amp does unloaded so that's why I always include it. If you just used the DMM SQRT method here, you'd be at ~ 24 and leaving some power on the table. This is also why I advocate the use of a scope. Almost 31v here.





    Sometimes you will see a highs amp tested and see them say, "all channels driven". This is why they say that. This is one channel driven at 5 ohms. This is almost 150w @ 5ohms but only a single channel driven.




    Now we load down all channels and see what we get.


    115w per channel @ 5 ohms and 13.4v. All channels driven. It's a power supply thang. 50A draw measured but not pictured.




    Bridged @ 5 ohms front and rear. All channels driven.


    340w bridged @ 5ohms and 13.2v. This is also basically what you'd see at 2.5ohms per channel. ~ 170w per channel @ 2.5ohms all channels driven. 70A draw measured but not pictured.




    So, yep. She's doing work. Observed efficiency was ~ 75% at 5ohms and 2.5ohms. I'd have liked to see it a little higher at 5 ohms per channel, but at this price point, you really can't complain about much.



    Subjectively... I think the little amp sounds great. And I know a lot of people who would agree with me. The amp has a "full" setting that lets you bypass all the filters and that's where I run mine so I can't comment on how the amp sounds using the onboard crossovers. I've had this amp next to several much more expensive amps and I honestly couldn't *hear* a difference. Maybe you can. But if your ears are that good, then maybe you need to spend $1,000 for this much power and make yourself feel better. For my money though... this amp is a fantastic buy.



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    pickup1's Avatar
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    Re: My test: PPi phantom 900.4

    Nice test,always wondered about these amps...




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    Re: My test: PPi phantom 900.4

    awersome! i always recommend this amp to everyone on budget builds!



    Front stage- HAT Imagine i61-2 for midrange and Rainbow Cal 25 Silk Tweeters for highs
    Rear Stage- Factory Premium Speakers
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    Sub amp- Crescendo BC2000
    Mid/High amp- Crescendo Concerto C1100.4
    Electrical- big 3, Optima Yellowtop
    NVX Sound deadener and Sealed doors
    Acoustic Sound Foam behind Front Mids

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    Re: My test: PPi phantom 900.4

    Good job, i also wondered.



    02 Nissan Maxima
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    200 amp HO Alt. One complete +/- run of Knu Ofc 0 gauge with big 3, volt meter inside, biggest acid battery under hood, Battery Isolator. A XS Power D3100 and a Crescendo Logic F-31HP battery in trunk.

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    Re: My test: PPi phantom 900.4

    thank you for the review




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    Re: My test: PPi phantom 900.4

    Great review




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    Re: My test: PPi phantom 900.4

    Going to sell it now?




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    Re: My test: PPi phantom 900.4

    Great test.
    PASMAG also reviewed\benched that model along with it's sibblings from Polk and hertz.

    They do rated for sure, great amps.




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    Re: My test: PPi phantom 900.4

    Quote Originally Posted by AAAAAAA View Post
    Great test.
    PASMAG also reviewed\benched that model along with it's sibblings from Polk and hertz.

    They do rated for sure, great amps.
    Ppi is a epsilon amp, soundstream, power acoustik, Spl, and ppi




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    Re: My test: PPi phantom 900.4

    Yes and Epsilon rebages just like most everyone else. NVX also has a version. This is not an epsilon design.




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    Re: My test: PPi phantom 900.4

    Nice. I have the brother to this amp.. The PPI 900.5 -- Which is very, very similar in build to the 900.4 -- Has lower output per channel as it's a full range 5 channel amp that I'm driving four 6.5" mids, four 1" tweeters, and one 10" sub. Which changes the specs to:

    900 Watt 5 Channel Amplifier
    Channels 5 ch. Class D
    RMS Power 4Ω 70x4 & 270x1
    RMS Power 2Ω 115x4 & 440x1
    RMS Power 4Ω Bridged 230x2 & 440x1
    I personally run it at 70w RMS x 4 ,.. and 270w x 1 for the sub -- In my particular setup this has the four Mids/highs at 50% gain setting,.. and the Sub channel at 60% gain.

    I can tell if I wanted to push it for more power,.. I could, and it likely wouldn't distort. But I keep it at rated (which I can't find any 12v vs 14.4v power ratings for it like the 900.4 has) -- So I assume these stats are for 14.4v.. But the way it feels/sounds and dials in -- It really seems like these stats 70x4 and 270x1 for the 5 channels are a 12v rating, because there is a significant difference when the car is on vs off when I dial in the amp .. IE: I believe it could be dialed in higher say 80-90 watts x 4 and 300-350wats x 1 without clipping/distortion at 14.4volts (ie: Car on, alternator running.. I have an active voltage gauge going in my vehicle and I run about 14.9v at idle.. and hover right around 15v when driving (alternator spinning faster of course).

    But loved the review.. gives me some peace of mind with the amp. Even though I'm running the 900.5 -- I've looked at the guts of both and they are remarkably similar.

    Exterior they are nearly identical,.. but of course the 900.5 has the extra sub channel, extra X-over/subsonic and little things like that due to it's design.

    Curious -- on the 900.4 you tested.. when you really pushed it for any length of time.. how warm/hot did the amp get? I bought my 900.5 class D because I have it in a non ventilated area.. so needed an amp that would run cooler. I ran it 2 hours yesterday.. and opened the compartment it is in and felt of it.. and it was hot. Not too hot to leave your hand on it indefinitely.. but considerably hot.

    Is this normal operation of 2-3 hours of heavy usage? Or with this amp,.. should I be cutting out the compartment door and wiring in a 200-240mm fan to actively cool the area? I'd prefer not to cut up the area if it being hot (not fry an egg hot.. but hot. after several hours) .. is completely within normal operating parameters for the amp.

    Thanks for the review.. excellent stuff!!



    Vehicle: 2008 350Z
    Headunit: Kenwood DDX-470 - Front Stage: JBL 6.5" MS62C Components - Rear: (1998 German) MB Quart 6.5" QM-160-KX - Sub: SRQ Custom Enclosure with JL Audio 10" W0v3-4 @ 300w RMS - Amp: 5-Channel PPI 900.5 - Wiring: KnuKonceptz 4g Power/Ground + 3 Sets Twisted Pair RCA's - 14g Speaker wire - NVX + Rattletrap Extreme Sound Dampner (30Sq ft.) Throughout - Extras: Rear/Reverse Camera - KCA-iP-202 w/ Garmin Navigation Integrated with Touchscreen.

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    Re: My test: PPi phantom 900.4

    Quote Originally Posted by Chromatic View Post
    Is this normal operation of 2-3 hours of heavy usage? Or with this amp,.. should I be cutting out the compartment door and wiring in a 200-240mm fan to actively cool the area? I'd prefer not to cut up the area if it being hot (not fry an egg hot.. but hot. after several hours) .. is completely within normal operating parameters for the amp.
    PPIs do run pretty hot depending on where you live, my 520 ion gets pretty hot on scorching summer days but haven't even come close to having any problems yet. Seeing how yours is in a closed compartment and its not egg frying hot yet then its a good thing considering its in and enclosed compartment. Go ahead and throw a strong fan in there for peace of mind, its not summer yet but its quickly approaching.



    Clip city b1tch, clip clip city b1tch. 10's, 12's, 15's, goin up in flames b1tch.
    2009 Sienna 3.5L Subs : C2 threatcon 15s. Sub amp: hifonics brx 2400.1D x 2
    Headunit: Pioneer 80PRS bought used from vertex audio Mids/Highs amp: PPI Phantom 900.4 - bought from dragnix
    Front stage: 3 way active front stage with Massive Audio CKX 6x9 component. ckx 6x9 midbass in doors + DB drive pro audio 6.5 in the kick. Rear stage: Jbl ms62C(Its a van I need rear fill). Still NOT ENOUGH! SEND HELP!! 4 Pro Audio 10s in the future
    320 amp Singer alt almost installed. Just a group 31 deka in the back atm with big 3 finished.

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    Re: My test: PPi phantom 900.4

    Quote Originally Posted by jeffdachef View Post
    PPIs do run pretty hot depending on where you live, my 520 ion gets pretty hot on scorching summer days but haven't even come close to having any problems yet. Seeing how yours is in a closed compartment and its not egg frying hot yet then its a good thing considering its in and enclosed compartment. Go ahead and throw a strong fan in there for peace of mind, its not summer yet but its quickly approaching.
    @jeffdachef ;

    Yes,.. but still some cold weather left.. Don't remind me of the heat.. I live in the Southeast,.. and 9 months a year we are 90+ with high humidity.. so these 20's now are great, plus the grass is dormant!

    Anyhow,... I took your advice as I was thinking about it from the first time I felt the amp;.. of installing a cooling fan.. So I had a few new Noctua 120mm large, low RPM, high CFM PWM fans laying around,.. and grabbed one, drilled some intake holes and wired it up via a fused relay at 3amps, and now the compartment is getting constant "fresh" cabin air. I was going to just put a fan inside, but thought if I was going to do it, I might as well maximize the fan and have it pull cooler cabin air.

    These fans are literally the best on the market,.. but man they are ugly (made in Germany).. Here's it installed,.. I think I should be good with this flipping on when the headunit does, ya?

    Last edited by Chromatic; 01-27-2014 at 08:29 PM.



    Vehicle: 2008 350Z
    Headunit: Kenwood DDX-470 - Front Stage: JBL 6.5" MS62C Components - Rear: (1998 German) MB Quart 6.5" QM-160-KX - Sub: SRQ Custom Enclosure with JL Audio 10" W0v3-4 @ 300w RMS - Amp: 5-Channel PPI 900.5 - Wiring: KnuKonceptz 4g Power/Ground + 3 Sets Twisted Pair RCA's - 14g Speaker wire - NVX + Rattletrap Extreme Sound Dampner (30Sq ft.) Throughout - Extras: Rear/Reverse Camera - KCA-iP-202 w/ Garmin Navigation Integrated with Touchscreen.

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    Re: My test: PPi phantom 900.4

    looks good, should have enough cool air to keep it moderate temps all around.



    Clip city b1tch, clip clip city b1tch. 10's, 12's, 15's, goin up in flames b1tch.
    2009 Sienna 3.5L Subs : C2 threatcon 15s. Sub amp: hifonics brx 2400.1D x 2
    Headunit: Pioneer 80PRS bought used from vertex audio Mids/Highs amp: PPI Phantom 900.4 - bought from dragnix
    Front stage: 3 way active front stage with Massive Audio CKX 6x9 component. ckx 6x9 midbass in doors + DB drive pro audio 6.5 in the kick. Rear stage: Jbl ms62C(Its a van I need rear fill). Still NOT ENOUGH! SEND HELP!! 4 Pro Audio 10s in the future
    320 amp Singer alt almost installed. Just a group 31 deka in the back atm with big 3 finished.

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    Re: My test: PPi phantom 900.4

    Jeff sent u a PM



    Looking to buy 2nd and 3rd gen Orion 2100 HCCAs.

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