I carefully peeled the warranty sticker to find that she's been on fire at least once. I may try to fix it tomorrow if I can figure out what exact part I need.
^^ This is why it's usually a good idea to open up Old School amps to visually inspect before powering them up. I wouldn't worry too much about warranty stickers unless the amp is in MINT condition
looks like ppi late 80's early 90's like when ppi was making MTX amp's and crutchfield
i tound this in another car audio forum-PPI made 2 series of amps for Crutchfield. Blue and grey. The blue ones were made in the early 90's the grey ones followed soon after. These were roughly equivalent to the M series. Good amps and good value. I have a 2x75 which really drives a 10" sub!!
Last edited by 1styearsi; 08-17-2012 at 09:11 PM..
looks like ppi late 80's early 90's like when ppi was making MTX amp's and crutchfield
i tound this in another car audio forum-PPI made 2 series of amps for Crutchfield. Blue and grey. The blue ones were made in the early 90's the grey ones followed soon after. These were roughly equivalent to the M series. Good amps and good value. I have a 2x75 which really drives a 10" sub!!
There was a JL Audio amp made by PPI on eBay a few months ago and it appeared to have the style of the late 80's PPI amps. I'd never seen one of those before, should've picked it up!
OP, I'm hoping the real PPI experts chime in soon, I'm not being much help here...
looks like ppi late 80's early 90's like when ppi was making MTX amp's and crutchfield
i tound this in another car audio forum-PPI made 2 series of amps for Crutchfield. Blue and grey. The blue ones were made in the early 90's the grey ones followed soon after. These were roughly equivalent to the M series. Good amps and good value. I have a 2x75 which really drives a 10" sub!!
The serial sticker and wty sticker is PPI, but the amp looks nothing like PPI. They didn't use knobs, early amps had different characteristics to the mobo.
This amp doesn't use a molex plug or anything. You have to screw down the speaker wires and remote.
The amp is weird lol. It's got direct connect power and ground, which is thick 4 gauge, but a 40 amp fuse and a weird screw down speaker terminal
I really want to try and fix it tomorrow but I don't know for sure what that component is that got fried up. It's labeled C81 so I assume it's a capacitor. I'm guessing it's the same as the others in that similar position. I am by no means in any position to try and repair this thing myself but I'd feel bad to throw it to the side and forget about it like a few of my other amps.
It's a real nice amp and I'm definitely itching to hear what kind of sound this thing produces.
I have a couple of questions... since I'm driving I can't look closely at pics but How do you know it's PPI...??.. PPI Pre-1996 amps can usually be easily identified by things mentioned above like "Made by PPI" or made in USA with the PPI sign... also it's often times small and almost hidden and on occasion partially obscured by a folded component... another thing is the numbers on the board can often help and sometimes even tell you which circuit boards are similar... eg.. a 4200m board is similar to a 2075 board and the 4200m board says xx-2075 Rev. X... lastly the early PPI amps evolved very straight forward and often you can pinpoint the years it was made.... I can't wait to stop for the night and look at your pics.... Keith
Dude when you get home please take a good look and tell me what you can.
It has a warranty sticker on the bottom cover that says Precision Power, that's all I can can see. I'm surprised that it's so bare, never seen an amp with no information at all lol
As for the board, it says 75-7510 REV B on it but nothing else.
Where did you pick it up..??., and the million $ question is how much do you want for it.... or heck I'd trade for it... and I havent even seen it..., I'll let you know what I think in an hour or two.... Keith
It's got a lot of differences in it than most any amp of that era because most companies used some wire to jump in their amps during that era and that one really is nearly wireless inside. The resistors back then were usually white block resistors, these were not. One thing about the resistors to note is that PPI spaces their resistors out, but Orion doesn't and back then they were similar in the way they lined them up, but this amp has them tighter together like an Orion. The shell size and shape is nearly identical in it's basic form to the Hifonics amps I linked from the late 80's, except the flat face. Hifonics were one of the only people to use knobs similar to those back then, not quite the same. (it's certainly however not hifonics)
Everything about that amp is a mystery. I'm sure the knobs go with the amp based on the side cutouts, but I'm wondering if the serial and wty sticker are original to that amp. PPI was making the PRO-Mos back then and preferred large lay-down capacitors, axial lead, (like most manufacturers in that era) rather than banks of stand up capacitors (we are talking mid-late 80's, not 90's where the Arts used large banks of caps). As far as I am concerned that amp has too much capacitance for PPI in that era. Those large blue block potentiometers were popular in Sound Stream amps, but SS used thinner ones they daisy chained up in large amounts. The rca's are very much PPI.
The only thing for certain is that because of that amp's age, it's Genesis.
It's got a lot of differences in it than most any amp of that era because most companies used some wire to jump in their amps during that era and that one really is nearly wireless inside. The resistors back then were usually white block resistors, these were not. One thing about the resistors to note is that PPI spaces their resistors out, but Orion doesn't and back then they were similar in the way they lined them up, but this amp has them tighter together like an Orion. The shell size and shape is nearly identical in it's basic form to the Hifonics amps I linked from the late 80's, except the flat face. Hifonics were one of the only people to use knobs similar to those back then, not quite the same. (it's certainly however not hifonics)
Everything about that amp is a mystery. I'm sure the knobs go with the amp based on the side cutouts, but I'm wondering if the serial and wty sticker are original to that amp. PPI was making the PRO-Mos back then and preferred large lay-down capacitors, axial lead, (like most manufacturers in that era) rather than banks of stand up capacitors (we are talking mid-late 80's, not 90's where the Arts used large banks of caps). Those large blue block potentiometers were popular in Sound Stream amps, but SS used thinner ones they daisy chained up in large amounts. The rca's are very much PPI.
The only thing for certain is that because of that amp's age, it's Genesis.
After looking at that board there's zero doubt in my mind that it's PPI.
The question is who did they make this for.
I'm wondering if it is a one off prototype since the board has no info and the heatsink is bare of any brand.
I'll shoot a link to The Stig and see if he knows.
Like I say, that amp is Genesis. It's the beginning of something. It should date around 1987-ish. It could have became one of the more popular amps of it's day in a later form of this version, which looks like a prototype. Beauty is in the eye of the beholder on this amp though... it's value is more in cool factor than price. It's not going to be an amp of great value, but coolness can't be measured on these Genesis prototypes.
PPI had a few dealer/competitor amps early on... I know 1 of them was a M series amp but I haven't seen one... I think it was an amp that was only sent out to those that were sponsored.... ... Keith
Old school Precision Power- Unknown model
Re: Old school Precision Power- Unknown model
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