Showing posts with label mtx. Show all posts
Showing posts with label mtx. Show all posts

Tuesday, October 24, 2023

Old School MTX Thunder Bandpass Subwoofer Box - Sold at Circuit City




In this article, we will be taking a closer look at an old school MTX Thunder bandpass subwoofer box. This particular speaker box was sold at Circuit City back in the day and features two 10-inch drivers inside. We will examine the construction of the box, clean the interior, and explore the woofers. Additionally, we will discuss the specifications of the MTX Thunder subwoofer box and its compatibility with the MTX Blue Thunder Pro amplifier.


Introduction to the MTX Thunder Bandpass Subwoofer Box

I recently had the opportunity to acquire a unique speaker box, the MTX Thunder bandpass subwoofer box. A generous individual contacted me and offered this cool speaker box, and I couldn't resist. So, let's dive in and take a closer look at this vintage piece of audio equipment.


The MTX Thunder Bandpass Subwoofer Box

The MTX Thunder bandpass subwoofer box is a single reflex bandpass box that houses two 10-inch drivers. The box features ports on both sides and has a single terminal. Upon initial inspection, the box appears to be a little dirty on the inside, so I decided to remove the Plexi panel to get a better look at its construction.


Inside the MTX Thunder Bandpass Subwoofer Box

After removing the screws, I lifted the Plexi panel and was pleasantly surprised by its thickness. The panel is approximately a third of an inch thick and has a gasket seal all the way around, ensuring a snug fit. However, the inside of the box did require some cleaning, as it was a bit dirty.


Examining the Woofers

Next, I proceeded to take a closer look at the woofers inside the MTX Thunder bandpass subwoofer box. I carefully pulled out one of the 10-inch drivers and noticed that the wires connecting it were surprisingly small. The woofer itself appeared to be a standard model from that era, with a foam surround that had not deteriorated. However, the wiring was inefficient and insufficient, with wires that seemed to be around 20 or 22 gauge.

Upon further inspection, I disconnected the driver and observed some bugs and spiders on the back. It's a good thing there wasn't any spider activity inside the box. The wiring definitely needed an upgrade, so I decided to replace it with larger gauge wire for better performance.


Cleaning the Box and Reassembling

Before vacuuming out the box, I took a moment to examine the inside and noticed a date stamped on the interior. The box also had two and a half inch ports and a terminal cut with small speaker wires. After vacuuming out the box to remove dirt and dust, I reassembled it, using the original small gauge wires to keep it as close to its original design as possible.


Cleaning the Acrylic Panel

The Plexi panel of the MTX Thunder bandpass subwoo fer box had some scratches and dirt on it. To clean it, I used a product called Novus Plastic Clean and a microfiber towel. I applied the cleaner to the panel and gently wiped away the dirt and scratches. While some of the deeper scratches remained, the panel looked much shinier and cleaner than before.

Shop for Novus Plastic Clean on Amazon*: https://amzn.to/3Fy9P2t


Testing the Speakers and Amplifier

With the box cleaned and reassembled, it was time to test the speakers and amplifier. I used an MTX Blue Thunder Pro 1502 amplifier to match the vintage style of the subwoofer box. The amplifier was wired up with eight gauge wire and bridged for optimal performance. I used 16 gauge wire to connect the amplifier to the subwoofer box.

The sound produced by the MTX Thunder bandpass subwoofer box was impressive. The deep bass tones were best experienced with headphones or quality speakers, as computer or iPad speakers may not do justice to the audio quality.


Conclusion

In this article, we explored the MTX Thunder bandpass subwoofer box, a vintage audio equipment sold at Circuit City. We examined the construction of the box, cleaned the interior, and discussed the woofers. Additionally, we tested the subwoofer box with the MTX Blue Thunder Pro amplifier, resulting in a satisfying audio experience.

If you're interested in learning more about the MTX Blue Thunder Pro amplifier, be sure to check out willistonaudio.com, where a full video of the amplifier's dyno will be released. Thank you for reading, and until next time, keep enjoying the music!

Sources:

  • 1999 Car Audio and Electronics Directory
  • *Amazon - Novus Plastic Polish is an affiliate link



Thursday, April 4, 2013

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



Saturday, March 17, 2012

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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