Fullscreen
Loading...
 

Sharp WQ-T354

The Sharp WQ-T354 is an interesting boombox from the mid/late 1980's. It has a total of 5 speakers, including the two main ones in front (12cm each), two small pizeo tweeters hidden at the far edges, and a 10cm "Super Woofer" sitting on top, called X-Bass. cool This X-Bass woofer has its own dedicated amp and band-pass filter. It does not activate until you press the "X-Bass On" button. The air from this speaker is directed down to the port at the bottom of the boombox.

This is exactly the type of radio I fantasized about when I was young. I loved the mystery about bass ports, wondering how much performance they added, if any. I'd go into stores and look at radios like this, trying to figure out whether the ports were real or fake. Were they actually connected to the speaker chambers? Or were they fake, sealed off, cosmetic only? Sometimes I would bring a penlight and shine it into the port to try and learn the truth. lol Fortunately the one on this Sharp is real, and it works great.

Image

Image

Image




Here are some diagrams of the X-Bass system. The speaker is attached to a plastic chamber that sits behind the graphic equalizer. This chamber (called the "Extra Bass Box") splits apart into 2 halves, and there are 3 baffle plate inside, which help extend the bass response and eliminate unwanted resonance. This is similar to how car manufacturers design their air intake boxes. cool

Image

Image

Image


Another interesting feature is the "Twincam" cassette deck that accepts 2 tapes in the same door. It has two pinch rollers and extra-long reels, and it allows you to switch tapes without opening the door. Or you can set it on "Continuous Play" so that it will play both tapes sequentially.

Image Image Image



The Sharp WQ-T354 is powered by two Toshiba TA7283AP amp chips: One for the X-Bass speaker, and the other to power the remaining 4 speakers. Power output is a total of 16 watts max. The X-Bass speaker is responsible for half of that (8 watts RMS max, at 150 Hz into 4 ohms and 10% distortion).

It measures 26 inches long, weighs 12.3 lbs without batteries, and requires eight D-cell batteries. You should be careful when buying this model, because the surround on the X-Bass speaker rots with age, and will probably need to be replaced.


Image Image Image Image

The service manual for this model can be purchased through this vendor: www.Analogalley.com(external link)

Service Manual available from AnalogAlley.com
Service Manual available from AnalogAlley.com




Created by Reli. Last Modification: Saturday 05 of December, 2015 00:36:24 GMT by Superduper.
The content on this page is licensed under the terms of the Copyright.