Tommy Clark's "Rockit Science" Ford Econoline Van 1989 IASCA Finals - Speaker Warehouse JL Audio PPI

Wow, I'm sure some of your old school guys recall this install in Car Audio & Electronics magazine back in the late 1980's...but thanks to YouTube user Manville Smith (not confirmed if this is THE Manville Smith, but once we have it confirmed, we'll update the page). It's something to see the install as pictures in a magazine, but the video just takes it to another level! The dedication to the details and the fine craftsmanship are second to none in this install! Enjoy the video!!

Watch it on YouTube Here or embedded below:







Make sure to Subscribe to my YouTube Channel to stay updated of my latest videos. You can also follow me on Twitter @oldschoolstereo. Also be sure to like us on Facebook.  Keep it Old School!!

-BigDWiz

Old School HiFonics Earthquake and Orion Installs - Jason's Review

Submitted article by Jason R

I'll show you a few different iterations of the MINI as well as the final install. I'm not as well versed or as tech savvy as some, so my reviews of the equipment might not be as in depth as one would like.

First we have the Hifonics Series VIII Zeus and Olympus. The Zeus powered a number of 10" subs until I settled on the Treo SSi 10.22. The Olympus ran a set of Genesis Profile 16's (2-way comps).

HiFonics Olympus and Zeus VIII Ampliifiers

Pics of the amps in the Mini

I have better pictures, I just can't find them. 

I had never run Hifonics before, so I didn't know what to expect. I am an Orion person, but my Orion amps are all too big for this car without having a rack of some sort. A plan for an Orion system was in the works, but until then I used the MINI as a rolling test bench. Normally, when I was impressed with something it would stay in for a month or so. Such as my smaller Orions or a few of the PPI's I had. There were others, but we'd be here all day. Anyways, I picked the Zeus up from a friend of mine in Houston, and as soon as I hooked it up (4 ohms bridged) I was taken aback by the brute force of this amp. I'd run other 2x300 amps before, but not like this. Whatever I was running to my comps at the time was made negligible. And being a sucker for sets like I am, I bought an Olympus. This amp reminded me of my Orion 2150 SX. I only used two channels of this four channel amp. 110+ watts per channel was more than sufficient for my 80 to 100 rms mids. Bridging was out of the question. Anyhow, I ran these two amps for close to a year. I was thoroughly impressed with the control and detail provided. I ran no outboard processors, other than a crossover, although I wish I had a Hifonics Vesta to control the Zeus. Also bear in mind that I never turn my gains up. They are not volume knobs. I'm a firm believer in big amps and high voltage head units. And yes, I understand the concept of level matching.

Zeus VIII, Olympus VIII, Treo SSi 10.22

HiFonics Olympus VIII power and speaker connections

HiFonics Olympus VIII inputs and level controls

HiFonics Zeus VIII power and speaker connectors

HiFonics Zeus VIII inputs and gain control

How about some guts?

HiFonics VIII Amps - Zeus and Olympus

Olympus VIII Internals

Olympus VIII Internals alternate angle

Olympus VIII Transformer

Zeus VIII Internals

Another angle of the Zeus VIII's Internals

The Zeus VIII's Transformer

I need to make this shorter or I'll be here all day. So I listened to the Hifonics and myself and everyone else who heard it was duly impressed. But I got bitten by a Mantz bug and started buying Earthquake amps. But Mantz didn't make Earthquake, you say? I was actually in the middle of paying one off when I learned that. The seller even thought I would change my mind about buying it. I didn't. Mostly because I don't back out of stuff, and also because I had just spoken with someone who spoke very highly of them. 

So onto the next phase; Earthquake MINI. I left all of the rest of the equipment untouched and switched out my Zeus for a PA-2300, and my Olympus for a PA-4050. However, I did one thing different. I bridged the 4050 into two channels.

Earthquake PA-2300 in immaculate condition

This gut shot was taken before the amp was overhauled.

Earthquake PA-2300 Guts

Earthquake PA-4050c Exterior

Earthquake PA-4050c Internals

 Sadly, the only pictures of the install (if you want to call it that) were on my old phone. I can give a quick review though. The difference between the Earthquakes and the Hifonics was negligible. The front amps shouldn't be a very fair comparison because they are two different class ratings. And I will say that even bridged, the Earthquake however marvelous, still did not quite keep up with the Hifonics Olympus. Normal folks wouldn't be able to tell. And the only real difference I noted between the 2300's was that the Earthquake didn't come with the same violent tendencies as the Zeus. But it did offer wonderful control over my sub and all four amps were simply amazing. I use the word "amazing" a lot when I talk about some of this stuff.

Current install: Orion MINI. This is what I've been working on over the last few months. You will note that the amps are mounted to the box. Please pay this no mind as every precaution has been taken with both enclosure and mounting procedure. Normally I wouldn't do this, but for this install, my amps are very well protected.

Custom Enclosure by Solid Sounds Designs also chrome Orion XTR-2250 and "the" Orion NT 200 

Front door speakers CDT ES-620 Golds and PPI EPX-205

Pioneer DEH-P80RS head unit and PPI EPX-205 Crossover

I'm still building. So this is where it's "supposed" to go. And the reason I chose to run this crossover is because I needed control over my 2250, and I wanted to supply the correct voltage to my Orions. Not just 5 volts sometimes. And anybody that has one of these Pioneers knows what I mean when I say the menus are nonsense. The configuration now is my 2250 bridged to my Treo SSi 10.22. I changed my comps out to CDT ES-620 Golds. I had to do a bit of fabbing and cutting to get these in. I was going to go active, but 1; I didn't have the time to mess with it, and 2; I like the 4th order elliptical passives just fine. I think CDT did a wonderful job on these comps. They sound darn good with no tuning and in stock speaker location. I have the Upstage kit for them. Maybe one day I'll add them.

CDT ES-620's in the door

Here are the amps:

Orion XTR-2250 (chrome plated) and Orion NT 200

Rear view of the MINI with the Orion amps

Orion NT 200 Internals

Orion NT 200 and NT 200 BIX

I didn't use my NT crossover because it requires XLR cables which I don't have. Maybe in a future install. And since I can't seem to find a picture of my chrome 2250's guts, I'll post something similar.

Orion Concept 97.3 and 2100 HCCA Competition Internals

^^Seen one, seen em' all!

So far the sound is truly breathtaking. I'll give a more in depth review once I get it dialed in and have listened to it for awhile. Thanks for looking!

Jason

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And yes, if you were wondering, the Orion NT 200 you see in Jason's pictures is the one you may have seen before on this website and in my YouTube videos. Thanks to Jason for taking the time to do the review! If you'd like to write and article or make a video of your old school install, contact me through Facebook and let me know.


Make sure to Subscribe to my YouTube Channel to stay updated of my latest videos. You can also follow me on Twitter @oldschoolstereo. Also be sure to like us on Facebook.  Keep it Old School!!

-BigDWiz

Old School Car Audio Tribute Video - Submitted

Here we have a great video put together by "MrRubenEsp" on YouTube. The video is a dedication to the old school car audio gear and installs. He mentions finding most of the pictures on the Internet, and I think he did a great job putting together the slideshow. Enjoy the video below!


I've asked before and will continue to remind OldSchoolStereo.com fans...please submit your photos/videos/installs/etc! You can reach me at oldschoolstereo at gmail dot com or via message on YouTube via username BigDWiz

BigDWiz - OldSchoolStereo.com

Old School 1990's 50 Watt Cheater Amps Tested

This post will be a work in progress until I complete my round of tests on the 25x2 Watt "cheater amps" from the 90's. I'll include a spreadsheet showing the results and links to the videos I create for each amplifier. Thus far, the test will include:

1) Rockford Fosgate Punch 45HD - from approx. 1991, not a true high-current amp like many of the other's, but well known to be underrated and able to handle almost any speaker load

2) Orion 225 HCCA - from the early 90's, test will include the "Digital Reference" and maybe the "Competition Amp/X-over" models. One of the most feared cheater amps of the early through mid 90's.

3) Precision Power ProMOS 25 - also an early 90's cheater amp rated to handle 1 ohm loads and promises the warm, smooth SQ of an early PPI amp

4) Phoenix Gold MPS-2240 - part of Phoenix Gold's "Mobile Professional Series" the MPS-2240 is identical in size to the MS-275 and is a high-current amp rated at 24x2 and designed to handle loads down to 1 ohm

5) Phoenix Gold M25 - the "M" series from Phoenix Gold were known for superb SQ and are very popular among collectors and those building old school systems as well.

6) US Amps 50HCA - an early version of a 25x2 cheater from US Amps. No crossovers, no terminal strips, just raw power and old school flair

7) US Amps USA-50 - a late 90's 25x2 amp designed to handle loads down to 1 ohm

8) Zapco Z50C2 - mid-90's amp, small in footprint, big in SQ



Bookmark this page as it will be continually updated with more information on each of these amps!



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1990 MTX Terminator MTA 250 Amplifier - PPI Built Cheater

MTX Terminator MTA 250 100 Watt Car Audio Amplifier

Following the theme of the recent posting of the Dragster DH 1804, I guess I have a thing for bright red amplifiers. The MTX Terminator MTA 250 is the most recent addition to the OldSchoolStereo.com collection and an impressive one indeed. The MTA 250 is one of MTX's first car audio amplifiers and was actually made by PPI (Precision Power). The MTA 250 closely resembles the PPI ProMOS 2050 and even uses the hated and nearly impossible to find replacement PPI speaker harness.

The MTA series of amps from MTX included two models; the MTA 225 and the MTA 250. Both models were stable down to 1 ohm and followed suit to the Orion HCCA's as "cheater" amplifiers for competition use. The 225 retailed for $500 US while the 250 was going for $650. In addition to the stunning red heat sink, MTX offered both models in white.

MTX MTA 250 Gain, Inputs, Max Thump, and LED's for Power and R/L clip

During the late 80's and early 90's, having a cheater amp was very important for competition purposes. There were several classes including under 50, 100, 150 and 250 watts. The higher wattage classes were ultra competitive, so those new to the scene and/or those on a budget would steer to the lower wattage classes. Cheater amps like the Orion HCCA's, PPI ProMOS, Phoenix Gold MPS and others were popular among competitors. The cheater amps could produce four times (or more) their rated 4 ohm power into lower ohm loads.

At the time MTX released the MTA series amps, they also introduced a Terminator line of subwoofers. They had a red cone and touted "2 ohm" resistance for maximum power output from your amp. A perfect match to the MTA series amps and their high-current, low-ohm output rating....marketing genius!

Here are the specs of the MTA 250 from MTX:

RMS Output:

• 4ohms Stereo: 50 W per channel
• 2ohms Stereo: 100 W per channel
• 1ohm Stereo: 200 W per channel
• 4ohms Mono: 200 W
• 2ohms Stereo: 400 W

Total Harmonic Distortion (THD): 0.02%
Frequency Response (+/- 1dB): 15-40kHz
Signal to Noise Ratio: 102dB A weighted
Slew Rate: 15V/us
Damping Factor @ 100Hz 4ohm load: >500
Damping Factor @ 100Hz 2ohm load: >250
Stereo Separation: 72dB
Input Sensitivity: 100mv - 2V
Input Impedance: 10k Ohms
Supply Voltage: 10.5-16V
Fuse Rating: 30 Amp
Shipping Weight: 12 Pounds
Dimensions: 14" L x 8.5" W x 2.3" H


Internal Bridging for Mono or Mixed-Mono Applications
MOSFET Power Supply and complementary discrete output circuitry
Two-layer glass epoxy computer grade circuit board
Low-Noise, sealed conductive plastic potentiometer
Designed and built in the USA

MTX MTA 250 "Gut" shot - Circuit Board

See video demo below!


Make sure to Subscribe to my YouTube Channel to stay updated of my latest videos. You can also follow me on Twitter @oldschoolstereo.


Watch the video on YouTube in 1080P HD or embedded below:

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Unboxing Old School Car Audio Gear

I will be the first to admit, unboxing videos do not appeal to me. Why? Mainly because people do unboxings for things like cameras, camcorders, computers, etc. and there is no excitement factor there. Now, take a plain brown box (with unknown goodies inside), open this up on camera and share your excitement with the world! This is how BigDWiz does unboxings at the OldSchoolStereo labs!


First off, I must say not all of the unboxings I do on my YouTube channel are from purchases. Many are from trades and barters for other gear. This is a part-time gig for me and I don't have unlimited funds to buy all of this cool, old school equipment. Well, since I know opening these packages is exciting for me, I thought you guys might enjoy the experience?

OldSchoolStereo.com Mystery Box!

Finding nice, old school car stereo gear is exciting in itself, but opening a package with unknown contents (well, unknown to you) is fun for all. Those of us who enjoy the old school gear also love to see "timeless classics"...the amps, speakers, head units, etc. that have either been babied or unused all of these years. I still find it amazing to see the condition of some of my 25+ year old equipment.


Most of these videos will just show the unboxing process, but in some cases, I may hook up and test the contents. Honestly, it just depends on how I'm feeling at the current time (and how much space is remaining on my iPhone's internal storage!). This brings up another interesting point....some of you may wonder what equipment I use to record and produce these short videos. Well, I have two words for you; iPhone and iMovie (we won't count "and" as a word!).


Recently, I've discovered making videos with the iPhone 4, is not only a simple process, but also gives a pretty good output video for viewing online. I also ensure use of the included ear buds / mic combination to get better audio, while still leaving both hands free to tear open the boxes. Once I capture the segments on my iPhone 4, basic editing is handled by the iMovie app for the iPhone. This $5 app turns your iPhone into a VERY powerful hand-held editing machine. If there is any interest, I may show the process I use to capture, edit and upload my videos to YouTube. You guys just let me know by making comments here or on my YouTube Channel.


While you are visiting, please Subscribe to my channel so you can get notification when I upload a new video. My intentions are to upload a new video every few days. As I've mentioned before, the more subscribers, comments, likes, etc. I have, the more videos I'll put up. I appreciate your enthusiasm as being an "old school nut" is addictive!


Unboxing Old School Car Stereo Gear
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Unboxing Old School Car Stereo Gear #2
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Unboxing Old School Car Stereo Gear #3
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Unboxing Old School Car Stereo Gear #4


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Old School PPI Pro Mos Amps - Precision Power!

Most of you old school car audio fans know the early 1990's was a time when aftermarket car audio was getting extremely popular. At this time, it was rare to find a factory CD player and the factory speakers were weak at best in most cases. Manufacturers such as Rockford Fosgate, Linear Power, Precision Power (PPI), Autotek, Orion and Soundstream (to name a few) were some of the very popular aftermarket car audio brands at the time.

The competition between the manufacturers was intense and each one was trying to best the other. Orion's HCCA series amps, released in the late 1980's were extremely popular and had an edge power wise on most other amps with their rating and ability to handle extremely low ohm loads. These low-wattage rated / low ohm handling amps came to be known as "cheater amps". The cheater amps could put out as much as 8x their rated 4 ohm power rating at lower loads. PPI hit the "cheater" market in 1990 with the Pro Mos 2050. Pro Mos was short for Professional Mosfet. This first gen Pro Mos amp was rated to handle loads down to 1ohm and would provide 4x it's rated 4ohm power at 1ohm. Cough up around $800 for a 50x2 amp, and get a 400x1 monster when loaded down. Interestingly enough, Orion's 25x2 "cheater", the 225 HCCA was stable down to 1/2 (some even say 1/4) ohm loads and would put out in excess of 400 watts and cost less than $600.

I've shown a comparison of the Orion 225 HCCA and the PPI Pro Mos 25 in a previous posting and video. You can see my preliminary power output results HERE.

PPI Pro Mos 2050 (top), Pro Mos 12 & Pro Mos 25 - Image (C) OldSchoolStereo.com

These Pro Mos amps were available up until around 1995, adding additional models including the Pro Mos 12, 24 and 50 (replacing the 2050) beginning in 1991. They also released 4 channel models; the Pro Mos 425 and 450. These Pro Mos amps were no frills, offering no internal crossovers or bass/treble controls. They offered a DIN connection for powering a PPI pre-amp or crossover in addition to the standard RCA input jacks. The Power and Ground connections were made via 8 or 10 awg leads and the speaker/remote connection was made by an infamous molex connector. I say infamous because this connector has been a huge failure throughout the years. The wires don't stay inside the connector and the molex connector itself breaks very easily. Many people created terminal strips or soldered the leads to the circuit board.

The Pro Mos amps you see in the photo above are the "art series", finished in white including a unique design by an artist. These amps were also available in black with red lettering.

See the video demo below:

Also, visit YouTube and subscribe to my channel for more exciting OLD SCHOOL car audio gear!

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