The Sanyo MR-X20, nicknamed "Big Ben," is a large, high-quality loudspeaker from 1981. It is only sold in Japan and comes with a Japanese label.
It also has another version with the English label called the M-X960. Both have the same functionality.
It measures 607 mm wide, 367 mm high (handle down) and 211 mm deep. The weight without battery is 9.6 kg.
There are 5 speakers, including two 12cm full-range speakers, two tweeters, and a 20cm Super Woofer located behind the detachable grille.
According to Sanyo, this "super woofer" is designed for frequencies below 300 Hz. Its volume can be adjusted via the Super Bass knob located to the left of the bass knob.
The subwoofer is powered by the Toshiba TA7205CAP amplifier, while the other four speakers are powered by the Sanyo LA4440 amplifier.
Sanyo said that the power output of the superwoofer is 10W, and the power output of other speakers is 10W.
This speaker is available in two colors, silver or dark gray. The silver one has a silver ring around the superwoofer, while the dark gray one has a red ring.
Overall, I think it was one of the best tape recorders of the 80s. The bass is deep and the treble is also very good. It's great to play house music on this.
The tape recorder is of good quality, with only 0.055% wow and flutter, and a frequency response of 30 to 17,000 Hz when using metal tapes.
Be careful when carrying or transporting this speaker with this portable speaker, as the antenna is mounted high in the chassis and can easily be damaged.
<h1 class="pgc-h-arrow-right" data-track="1" > audio introduction</h1>
A country of origin: Japan
Production address: Osaka
Manufacturing company: Sanyo Electric Co., Ltd
Date of manufacture: 1981
Product Category: Cassette Stereo Broadcast Receiver - Audio Recorder
Product brand: SANYO Sanyo
<h1 class="pgc-h-arrow-right" data-track="23" > specifications</h1>
Number of transistors:
Power amplifiers: The superwoofer is driven by a Toshiba TA7205CAP amplifier, while the other four speakers are powered by a Sanyo LA4440 amplifier.
Main principle: superheterodyne (ordinary)
Band: Broadcast, AM FM
Reception rate: FM 76~108Mhz, AM 525~1605Khz, Tape 30~17Khz
Input and output interfaces: FM/AM external antenna terminal, phono input terminal, output terminal, mixing microphone terminal x 2, ground terminal, player synchronization terminal, external speaker terminal, headphone terminal, AC 100V terminal, DC 15V terminal
Details: Cassette recorder or player sound
Power supply type: AC 100V; 25W; DC12-15V
Power frequency: 50/60Hz
Battery: D10x 1.5 volts
Speaker features: 5 speakers in 3-way with 5 speakers, this "superwoofer" is designed for frequencies below 300 Hz. Its volume can be adjusted via the Super Bass knob located to the left of the bass knob.
Speaker dimensions: Includes two 12cm full-range speakers, two tweeters and a 20cm "8" superwoofer located behind the detachable grille.
Frequency characteristics: The tape recorder is of good quality, with only 0.055% wow and flutter, and its frequency response is 30 to 17,000 Hz when using metal tapes.
Signal-to-noise ratio: 54dB (normal tape)
Flutter: 0.055% (WRMS)
Battery life: About 5 hours
Nominal power:
Actual power: 25W
Standby power:
Material: Plastic
Model: Sanyo MR-X20, nicknamed "Big Ben"
Shape: Portable kit > 8 inches (can also be used without power supply)
Dimensions: (WHD) 607×367×211 mm
Weight: 9.6 kg (excluding battery)
Unit price: At the time, its suggested retail price was 97,800 yen.
<h1 class="pgc-h-arrow-right" data-track="52" > Sanyo MR-X20 Portable Tape, Description of Big Ben Audio:</h1>
The Sanyo Ghetto-Blaster is slightly awkward in shape, and the subwoofer can diffract well as the bass as downward as possible. Ignoring the left-right distinction, you can hear deep bass from anywhere and the audience will cheer.
To emphasize "listening regardless of location", he boldly added 3D effects... Therefore, in the 80s, this distinctive high and low tone, especially the low frequency of tens of hertz, became the main advertising slogan of the product packaging at that time.
Sanyo borrowed the London clock tower "Big Ben" on the one hand at that time to symbolize the loud and heavy sound and excellent cassette player. On the contrary, at that time, people judged it to be a large-caliber horn hanging like a big bell, which is really a self-evident description. In any case, it is a plausible name.
I can't find the exact specifications. However, considering that the 8-inch subwoofer is responsible for below 300hz, and the playback area of the built-in cassette recorder is defined as ~30hz, 50~60hz is enough. In fact, it is enough to add a few dB active enhancers to the subwoofer's circuitry.
All in all, so... Anyone who has heard the shocking and heavy bass and drums will think it is a shockingly great device and will not hesitate to pull out their wallet and buy it.