Precision Power PPI i520.4 - Customer Ratings & Reviews

Great!!

This is a powerful amp. I am running 4 of the 7" alpine marine speakers with this amp. Wow!! I have room for 4 more speakers on this amp. Very pleased. I highly recommend.

Precision Power PPI i520.4 - a stealth addition to my reportoire

Been dying to amplify my 4 coaxials, 2 Kappas in the front and 2 MB Quarts in the rear. This thing delivers, and packs a wallop at such a small footprint. I can see others mounting this is other stealth spots like under the driver seat or even under a truck bench. And it puts out the wattage! Trust me, quality PPI construction and performance at an absolute steal of a price!

Good Amp

The amp works well. I mounted it under my passenger seat. The vehicle was a 2004 corolla. The amp was so small, it very easily fit under the passenger seat. Installation was a breeze and it powers my kicker speakers very well. The one con I found about the product is the ground and power terminals on the amp are stacked on top of each other. Normally those terminals are side by side. I ran 4 gauge power and ground to the amp. The gauge was so large, I could not screw the ground wire screw down far enough to fit in the power wire above the screw. I had to trim down the gauge of the ground wire and power to get them to fit into the terminals. You will need to trim 4 gauge wire or go with 8 gauge wire.

Great sounding amp with lots pf power.

Great sounding small amp with lots of power. I used his amp along with a new set of components and rear speakers and this little amp rocks. With its small size was super easy to do a clean install and easily hide it

GOOD

Owned it for seven months now, it plenty of power and no noise, clean sounding mids and highs lasts long, runs warm-borderline hot on 95 degree summer days but on normal weather 50-80 degrees, it runs real cool. What have i used that i can compare it to? JL audio 60 x 4 A/B channel amp, no difference in sound quality at all, but this ppi amp offers more power with better efficiency. Definitely way better then my friend's hifonics zues/gladiator 100 rms X 4 channels in terms of sound and raw power. Only bad thing i can knock on it is that its not Active capable, pretty much an amp with globs of power and minimal crossover functions.

Awesome little amp.

This amp can be hidden anywhere, so it makes installation a breeze. I had always been a PPI user, and wanted to see if PPI still produces good products.

Even though I am currently only using it for my component set (MB Quart OSC213), it sounds great with no overheating for a chassis this small. I still have to connect my Rockford 10" to it, but from what I have heard from it so far, i am sure i will not be let down.

Great little amp for the money.

This amp is a great value. I'm running a front soundstage in my car from this little guy, and thus far it's been great. I can't speak to its crossover capabilities since my DSP is handeling that end, but the power is sufficient for my 7" drivers and 2" tweets.

Great little amp

This amp is a great value. I am surprised at the size and it drives my system great, clear sound and runs cool.

Great product!

People will underestimate the power of this amp, I hook it up to 4 infinity kappa at 2.7ohm and barley touch the gain, my door speaker are screaming at me.

By Anonymous on March 27, 2019 Verified purchase

Great amp

A great little amp, used 8ga cable for the power and ground. Its powering 1 Polk 5x7 and 1 Alpine tweeter for a 2 ohm load on each channel.
Couldn't be happier!

By Anonymous on March 16, 2019 Verified purchase

Precision Power PPI i520.4

I have this amp powering my Morel Ultra Tempo components and I couldn't be more happy. I'm not crazy about the design with the power directly above the ground and the power opening is not big enough for 4 gauge wire. I ended up using 10 gauge from my distribution block and that helped. Overall this is a great little amp for the price!

By Anonymous on May 10, 2018 Verified purchase

Price is king

Timely,value,selection,free shipping, honesty,savings,clean products that matter

I Wanted to Like this Amp

TL;DR Great cheap small amp, I had a bad one.

Amp is stupid small, easy to find a good spot to install. It's actually kind of hard to fathom the power this can put out when you're holding it, it's just so small.

Anything over USB or Bluetooth sounded fantastic, power is on par with the ratings, clear as could be audio.

Since the other reviews on this amp are so great and no issues like this, Sonic support and I could only determine that the unit I received was a faulty one and had to be returned unfortunately.

This amp absolutely murdered radio reception. Of the 9 stations I tested, one was completely gone even if I am in the city where it is broadcasting from. 7 stations I still received, though all of them had crackles with static, and one station came in mostly fine with only the occasional crackle and break up. With the fuse pulled, I can get audio on every single channel, some a little better than others.

My radio has a symbol for audio output and another with bars to show signal strength. I tested with the amp connected, and with the fuse pulled to see the difference in reception.

For audio received we'll say
None=no audio in
Some=some audio, but a lot of static
Most=mostly audio, little static
Full=Full audio no static

For signal strength it's 1, 2, 3, 4 bars with 4 being the strongest signal.

Before:
Station 1: 4 ; Full
Station 2: 2 ; None
Station 3: 1 ; Some
Station 4: 4 ; Some
Station 5: 3 ; None
Station 6: 4 ; None
Station 7: 1 ; Some
Station 8: 1 ; Some
Station 9: 1 ; None

After:
Station 1: 3 ; Full
Station 2: 1 ; Most
Station 3: 1 ; Full
Station 4: 4 ; Full
Station 5: 1 ; Full
Station 6: 2 ; Full
Station 7: 2 ; Full
Station 8: 1 ; Full
Station 9: 1 ; Most

While it looks like I am getting less of a signal on many of the channels, the only thing I could conclude was that there was so much interference thrown by the amp that it was overpowering the local radio stations and the Radio was picking it up as a signal. Particularly #5/6 (104.5/105.3 FM for me locally) would be silent, with a faint squiggle of a squeal sound underlying the white noise.

Small and powerful!

This amp does work! It has a real small footprint and a high wattage output! Love this little thing! Great buy!

By shane on December 10, 2015 Verified purchase

Solid Little Amp

I've been impressed with this little thing. First and foremost, it's tiny -- really tiny. 15 years ago I had a ESX 120w x 4 amp that must have been 4x the size of this. The small size made an under seat install really simple and painless. It also seems to be very efficient. Even after extended high volume listening it's always surprisingly cool to the touch. The option of running a size or two smaller power wire since it's less of a power hog is nice as well.

I have two channels powering some Infinity Reference 6.5" coax speakers, and the other two channels bridged to power a small subwoofer. Sounds great to my ears, plenty of punch. The difference between head unit power and the amp power to the front speakers is night and day.

If there's a con, it seems to have a little bit of a noise floor. I can't hear it with the car running, but sitting in the garage in silence, with the volume set very low I can hear a faint hum on quiet tracks. Turn the volume up a few clicks and I can't hear it -- it doesn't increase with output, just a low level, constant hum. Maybe that's due to class D design vs. AB design? I don't know... I'm not an expert, I just wanted good sound in my daily driver, not an SQ build. I wish it wasn't there, but I don't even notice it under normal circumstances.

The crossovers are also limited. I knew that when I was buying it, but two frequency, selectable (not variable) crossovers might not cut it for some. My head unit has built in crossovers with lots of options so it wasn't an issue for me.

Precision. Power. 520i. 4. Channel

I. Love. This. Little. Amp. Lots. Of. Pure. Power. No. Joke.

Best. Amp. I. Heard. So. Far. In. A. Long. Time. From Alvin bowen

I. Recommended this Amp to any one who loves awesome power. No. Cons. On. This amp. I. Had. A pionner. Gm 5702. 2ch.car amp. In. My. Car 150 per channel. And. Let. Me. Tell you. This. Little. Precision. Power amp. Played. More. Cleaner. And. Louder than my. New pionner amp this is my. First time owning a. Class d amp they. Are. Awesome and. This. Little amp is. Very easy. On your. Battery but. Be. Careful on. The. Gain. I. Blew. A. 12inch Jensen sub. With this power house. Must have. This. Amp. I guaranteed you. Will be. Shocked with so much. Power

Feels well made, Nice weight.

I've just installed this amp. I like the look and feel of the amp however the screw terminals on the amp are pretty cheap, I liked the remote out feature however it causes my sub amp to "pop" when it turned on. I wired my remote to my sub amp and jumped to this PPI amp and that "pop" is gone.

Keep in mind when watching the sonic amp dyno video they are testing at 1% THD not the 0.05% THD PPI claimed.

Great little amp for the price!

I had a Fosgate DSM4040 since 1994. When it finally died I decided to give ppi a chance since they used to do well for me. I’m powering some Audiofrog 6” on 2 channels and a 10” sub on a bridged channel. Twice as loud, just as clear. Almost too much for my tiny cab 56 GMC. Hope it lasts as long as that old Rockford amp did!

By Mike on May 21, 2024 Verified purchase