OldSchoolStereo News and 8" Old School Subwoofer Demos

OldSchoolStereo fans and followers...my apologies for the delay in posting new articles. I've been extremely busy with my day job and family the past few months. I just wanted to let everyone know I'm still an excited and enthusiastic member of the old school car audio scene and hope to be back with lots of more content soon. I'm just trying to set expectations that the articles and videos may not come as often as they have in the past for many more months. I truly hope you guys will stick with me and be patient as I have some big things planned for the future.

Oh yeah, I almost forgot to post some recent acquisitions...see below, and also enjoy my recent videos.

Early 90's Rockford Fosgate Power 1000c Mosfet and Kicker F12-4 Subwoofers

See the recent old school 8" subwoofer demo's below!


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

Rockford Fosgate Punch SP-88 8" Subwoofer Demo:

MTX Blue Thunder 8" Sub BTW-834 Demo:





JL Audio 8W1 Old School 8" Subwoofer Demo:



More coming in the near future...stay tuned!


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

Orion NT200 Special Edition SQ Amplifier

Special edition amps are always cool. You know, the ones with the unique colors, fancy designs, hand-picked components? Many amplifier manufacturers made these types of amps  in the 1990's, as a way of differentiating themselves not only from other amps on the market, but even from their own product line. The amplifier we are going to discuss today was available in 1996 from Orion with an MSRP of $1200 US. The NT200 has one of the most unique paint schemes I've ever seen on a car audio amplifier...even to this day. It's a marbled purple and must be seen in person to be appreciated.

The NT200 and brother NT100 were designed as no compromise, no excuse sound quality (SQ) amplifiers. See the ratings below for the NT200:

• Two Channel Amp rated at 100 watts x 2 channels at 4 ohms
• Dual Mono Design - Two separate power supplies
• Bridgeable to 400 watts at 4 ohms
• No built-in crossovers
• Balanced inputs via mini XLR connectors
• 2 ohm stereo / 4 ohm mono stable (rated)
• Dual 30A internal fuses for power
• Optional NT200BIX balanced crossover

1996 Orion NT 200 "Dual Mono Block" Special-Edition Amplifier

The NT200's balanced audio inputs served two main purposes...to keep the audio signal as clean as possible and to minimize unwanted noise. The only issue with these types of inputs is they are incompatible with the standard RCA wires used in most aftermarket installs (without adapters). However, Orion's decision to use balanced inputs on these amps showed they were serious about these amps and their dedication to sound quality. Alternatively, you could also use the standard Orion DIN plug connection with an Orion (or PPI) crossover or signal processor. 

Orion NT200's Balanced and DIN inputs

Before I received the NT200 at the OldSchoolStereo.com labs, I thought this amp was going to be an Orion 250 HCCA all packaged up into a fancier heat sink. Boy, was I wrong! Just check out the internals of these amps and you can see there is a BIG difference in them! You can easily see the NT200's larger capacitors and dual power supplies. It really makes the 250 HCCA look rather anemic!

Top: Orion 250 HCCA "Digital Reference" Bottom: Orion NT200

Orion NT200's Internals or "Guts"

Here's another picture of the 250 HCCA vs. NT200. Both amps are gorgeous in their own way, but if you're ever forced to choose one or the other...go with the NT. Not that the HCCA is a bad amp, it's actually pretty fantastic in it's own way (and a high-current version of the 2150SX). More about the HCCA's on another day.

Orion 250 HCCA vs. Orion NT200

See the video's about the NT200 below!

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

Photo and Video Montage of the Orion NT 200:

Power Output Video of the Orion NT 200:





Other Videos about the Orion NT200 and related gear:

- Orion NT200 Power Output Teaser Video
- Orion NT200 Unboxing
- Orion NT200BIX Balanced Crossover Overview

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

Amazing Car Audio Museum in Germany

It has sort of been a dream of mine to put my old school equipment into a showcase, sort of a museum. Unfortunately, I don't currently have a good room to showcase my gear, but maybe one day. In the meantime, check out this guy "Danny" in Germany and his awesome collection of old school car audio and an incredible display of it all. I'd call this the ultimate man cave! Although some of the text is in German, all of the pictures are in English ;-)

http://www.carhifi-magazin.de/ch_blog/?p=723

Keep it old school, more goodies on the horizon!

-BigDWiz

3840W Custom Power Resistor Bank for Testing Amplifier Power

Yes, I know, if you guys watch my YouTube videos, then you've probably seen my old resistor bank (aka "Fred Sanford" - Big Dummy). This resistor bank was comprised of (16) 50W resistors for a resulting load of 800W at either 2 ohms or 8 ohms. It was a great starter resistor bank, but in testing amps such as the Orion XTR-2250 and Rockford Fosgate Power 1000 Mosfet, I needed not only more power capability, but also configurations for 4 channel loads at 2 ohms.

Before I get too deep in the discussion of the new resistor bank, let me digress and explain my use of the resistor bank. In this case, I use the wirewound power resistors for testing audio amplifiers power output (in watts). Many people use speakers when attempting to calculate amplifier wattage output, but fail to account for the fact a speaker is a reactive load and other factors must be calculated to obtain wattage. When using resistors, the wattage calculation can be more easily obtained using Ohm's Law. We use a Velleman HPS-50 o'scope/True RMS Volt meter, Fluke 85III True RMS Volt meter, Steve Meade Designs/ D'Amore Engineering DD-1 (aka SMD DD-1) along with our resistor bank to calculate continuous (RMS) power output from the amplifiers we test. For more information on how I test my amplifiers, see this video (to be updated soon).

I recently invested in (32) 120W 16 ohm wirewound resistors so I could test a wider variety of amplifiers. See the result below:

Custom 3840W Resistor Bank made from PC Tower

The OldSchoolStereo.com 3840W Power Resistor Bank has the following features:

- Custom PC Gaming Tower
- (8) Separate 480W 4 ohm loads
- Supports 8 channel amps down to 1 channel monoblocks
- (3) Internal 12V fans in push/pull configuration for maximum air flow
- 12VDC 600mA AC Adapter for powering the fans
- capable of testing 4 channel amps with all channels driven at 2 ohms (960W each)
- configurations for high-current amps at 1/2 ohm mono (3840W)
- multiple configurations for 1 ohm and 2 ohm loads (both stereo and mono)
- safely test amplifiers silently at various test tone frequencies
- Acrylic window showing off my lackluster wiring skills

Rear view of the 3840W Power Resistor Bank

Stay tuned for an upcoming video overview of the 3840W Air-Cooled Power Resistor bank.  We also have MANY amplifiers to test in the upcoming months, so stay tuned for updates, tests, overviews and more!



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

Amplifier Bench Tests Rare Amps and More

Once again, I've slacked off posting on the blog here. My apologies, I've been focusing on creating more content for my YouTube channel. Make sure you subscribe so you can stay updated and notified when I upload new content. My goal is to upload at least one video a week and for the past few weeks I've been doing 3 videos per week! See some of my recent video uploads below.

Wow, check a MINT copy of a mid-1970's Fosgate PR-235 amplifier. These amps are ULTRA-RARE and finding one in this condition is almost unheard of. Big thanks to Mike for sending this one my way!




Next up, a patiently awaited power output demo of a MINT Lanzar Opti Drive 50c ultra-cheater amplifier from the mid-1990's. Can it meet or beat it's 800w rating at 1/2 ohm mono? Watch the video to find out!






What about a purple beauty? Say what? The mid-1990's rare special edition Orion NT 200 arrives to the OldSchoolStereo.com labs for testing. This amplifier is a dual-mono design and was built to the strictest standards to ensure the best sound quality possible. Watch me un-box and show off this beauty! 

Now, here's another very interesting power output demo. We test the Orion XTR-2250 "The Beast" amplifier to see if it can stand up to it's name. Well, do you think it can match or exceed it's rated 1000w output at 4 ohms bridged? No spoilers here, watch the video to find out! 

Orion XTR-2250 RMS Power Output Video

***Amp output tests coming soon. We also have lots of cool overviews of some fantastic Old School Car Audio Thanks for your patience!***

Donations to OldSchoolStereo.com

I recently accidentally deleted several emails from my phone and found they were not put in the deleted folder, but deleted entirely. I had a couple of people inquire about donating items to OldSchoolStereo. I'm hoping you read the website and see this post and send me another email.

You can feel free to use the donate section of this website or contact me if you have amps, speakers, head units or other old school gear you want to donate. I will most likely sell many of the donated items to help pay for the website and test equipment. 

Thank you for your support!

-Dereck

Video Updates - Lanzar, Fosgate, Alpine and More!

I've uploaded several videos since the last blog post here on OldSchoolStereo.com. There are three videos about the Fosgate "Frequency Energizer" Model 201 processor. If anyone has any further details about these units, please contact me at oldschoolstereo[at] gmail dot com.

First up, see the Alpine 3342 11-band EQ / Sound Field Processor. Just a quick overview of the EQ and showing it in action!





Next up, see baby Lanzar Opti Drive Plus 50 amplifier. I've had several people request I show off how I test amplifiers for operation when they arrive at OldSchoolStereo's labs. This is not a power output test, rather a simple speaker test of each channel and bridged operation.






Next up, see the BIG Lanzar Opti Drive 50c "Ultra-High Current" amplifiers. You'll see an early 1994 blue model and a later 1996-1998 black model. I overview the connections and check the amplifier "guts" for differences between the models. In a future video, we'll also bench test each of these amps for power output. Do you think there will be a difference in the output at 1/2 ohm mono? It will be interesting to see...

Now, here's some vintage gear from Fosgate Electronics. Yes, I said Fosgate, not Rockford Fosgate. This means pre-1980, folks. The Frequency Energizer you'll see is from around 1973 and is the foundation for the Punch EQ circuit used in Fosgate and later Rockford Fosgate car audio amplifiers. 

Fosgate Frequency Energizer "Teaser" Video

Fosgate Frequency Energizer Overview Video




Fosgate Frequency Energizer Demo Video
See the vintage sound processors in action!





***Amp output tests coming soon...I've done tests on the Lanzar 50c and Orion XTR-2250. As soon as I get a chance to edit the videos, I'll have them online. Thanks for your patience!***

Navigation of the Website

Make sure to check out the links near the top of the site...we've added links to our Forums, Videos, Donations and most recently, Installs. If you have an old school install you'd like to share, let me know about it in the forums. 

More info and what you've all been waiting for....Amp Tests coming soon!

Old School Soundstream MC500 Car Audio Amplifier

You guys know I like the old school "monster" amps, and I recently came across a rare beast indeed...a Soundstream MC500 from the late 1980's. The MC500 was part of the original "monster amp test" held by Car Stereo Review back in 1989. Here are the specs of the MC500:

• Four Channel Amp rated at 125 watts x 4 channels
• Bridgeable for 2 or 3 channel operation delivering up to 250 watts x 2 channels
• LSE - Linear Subwoofer Extension with adjustable frequency for added low end impact
• No built-in crossovers
• 2 ohm stereo / 4 ohm mono stable
• Dual 30A fuses for power
• Up to 70A current draw at maximum output

1989 Soundstream MC500 Amplifier

The MC500 was one of the few amps in 1989 to have integrated terminal connectors. The power, ground and speaker terminals can accept up to 8GA wire. The RCA jacks are gold plated and very high quality. The dual 30A fuses are inserted just beside the power terminals.

Soundstream MC500 Amplifier - Power Connectors

The Soundstream MC500 was available for a short period of time around the 1989/1990 time frame. From what I've been told by Soundstream experts, this amp was one of the few Soundstream powder coated. Most of their other amps at this time (D series and Class A) were anodized aluminum. Many of the first batch of MC500's had extreme paint flaking issues and had to be recalled. The next run of amps had a better coating, but based on the U.S. MSRP of $1295, not many of these amps were sold. 

Unlike many of the other Soundstream high-end amps at the time, this one was not touted as "Class A". That said, the MC series (MC500, MC300, MC245 and MC140) were well regarded for their sound quality and flexibility. Yes, at the time, 500 watts was considered BIG power! 

Soundstream MC500 guts - Nice!

Amp output tests coming soon...just waiting for the NC weather to cool a little. Maybe one day my labs will be climate controlled! Enjoy the video overview below. Output test coming in the future.


See my video overview of the Soundstream MC500 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 or embedded below:

Possibly the Ultimate 50 Watt Cheater Amp from the 90's?

Yes, I know, if you guys watch my YouTube videos, then you've probably seen the Lanzar Opti 50c. But wait, is it possible another "50 watt" amp may give the Lanzar a challenge for king of the 25x2 amps? Well, yes, specifically the U.S. Amps VLX-50. I recently came across a near MINT 1996 model in the "Mirror Polish" finish which looks nearly chrome. See the pics below:

1996-1998 U.S. Amps VLX-50 Ultra-High Current Cheater Amp

The VLX-50 has the following ratings:


2 x 25W at 4 ohms (12V)
2 x 31W at 4 ohms (14.4V)
2 x 62W at 2 ohms (14.4V)
2 x 125W at 1 ohm (14.4V)
2 x 250W at 0.5ohm (14.4V)
2 x 500W at 0.25ohm (14.4V)
1 x 1000W at 0.5 ohm bridged (14.4V)
THD: less than 0.006%
External 120A Fuse Required

VLX-50 Inputs and "Vari-Loud" controls

The U.S. Amps logo is laser etched on the heatsink and it surprisingly took me several days to prove this was actually a VLX-50. For some reason, U.S. Amps didn't put any markings on the end plates or even on the circuit board indicating the model of some of their amps (this one included). I was able to get confirmation from U.S. Amps this was indeed a VLX-50, based on the serial number. I even posted a thread over on DIYMA to get some info and got some great info in the archaeological dig.


So, the best part about having an amp rated at 50 watts total put out 1000 watts is the "cheater" factor. Back in the 90's, you could have two of these and still compete in the 100 watt and under competition class (as they rated amps by their 4 ohm output power). Thus the "cheater" status as you could have up to 2000 watts if these amps were properly loaded down. Orion really started the cheater amp category with the 225 HCCA, which was introduced in the late 1980's. Also, as a response to ultra-cheater amps like the VLX-25 and VLX-50, Orion developed the "1-watt" Concept 97.3 back around 1997. The cheater amp era basically ended around the early 2000's as most manufacturers were competing to see how high they could rate their amps (by using MAX power) instead of underrating amps. Another reason why I prefer the car amplifiers from the 80's and 90's...

VLX-50 Power / Ground / Speaker Terminals

Get ready for the long awaited 25x2 cheater amp shootout. As soon as the temps cool and I complete my additional resistor loads, we'll see how the VLX-50 competes against the monster Lanzar 50c. I don't believe the Orion 225 HCCA, Rockford Power 50x2, MTA 225HO or Audio Art 50HC have a chance against the VLX-50 or 50c, but who knows? We all may be surprised!




See my video overview of the U.S. Amps VLX-50 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 or embedded below: