Science & Technology




Sound Advice: Best screens to use with projector

Q. I am interested in setting up a portable indoor/outdoor theater using a Nebula Cosmos projector. What screen do you recommend? I see Nebula has a new Cosmos Laser 4K projector. How does it compare to the Cosmos Max 4K?

—K.C., Pittsburgh

A. Look for a smooth PVC screen with 1.1 gain. I use a JWSIT 120-inch indoor-outdoor screen ($178) that...Read more

Sound Advice: 3 options for a high-end speaker upgrade

Q. I have an Emotiva preamp and amplifier and am looking for new speakers between $4,000-$6,000 per pair. I could spend more if they would be something I would be really happy with. The room is 12x17 feet with an open beam ceiling. What do you recommend?

—D.N., San Francisco

A. Your price range is close to the maximum for equipment I ...Read more

Don Lindich/Don Lindich/TNS

Sound Advice: Where to get 3D glasses for older TV

Q. I have a Panasonic Plasma TV (TC-P42ST30) that I purchased in November 2011 and which continues to deliver a good quality picture. This TV has the capacity to play 3D Blu-ray Discs, which I have never done before. I have acquired some of these 3D discs and would like to give it a try. What make and model of 3D glasses are compatible with my ...Read more

Sound Advice: Setting up stereo system for game room

Q. I want to set up a stereo with a record player and CD player in my garage game room, which is 400 square feet. What would you recommend for a budget of $1,000 to $2,000?

-D.D., San Jose, Calif.

A. When building a system you should start by choosing speakers, then a receiver or amplifier with adequate clean power to drive them in your room. ...Read more

Sound Advice: Bookshelf speakers can be repurposed for TV sound system

Q. We have a living room with a 49-inch TV on the wall and small Boston speakers on cabinets next to the TV area. (The Boston speakers were in the home when I bought it in 2008.) We are older and don’t really have hearing problems, but fairly often we really have a hard time understanding voices on TV.

I know you like ZVOX, but someone ...Read more

Sound Advice: Hooking up Bluetooth transmitters and promising new electric shaver

Q. Can I attach a Bluetooth transmitter to the speaker outputs of my receiver? I do not have any preamp outputs that I see on the back of my receiver, and I want to transmit the signal to a Bluetooth speaker in another room.

—K.L, Milwaukee

A. Using speaker-level outputs will blow out the transmitter. You need a “line level” output, ...Read more


Sound Advice: A turntable cartridge upgrade that won't break the bank

Q. I have an Audio-Technica AT-LP120-USB turntable and would like to upgrade the cartridge. My budget is $100-$200. I am finding that my price range has relatively slim pickings and the cartridges in this segment are largely ignored by reviewers. As I look around, most of the recommended cartridges are budget models under $100, or step-up models...Read more


Sound Advice: In praise of skin tightening machine, and tips for using one

Q. I read your article about the gel to use with the RF skin tightening machine, but not the one recommending the machine itself. What brand were you referring to and how has it worked for you?


A. I have been using the AOGNY Skin Tightening Machine since late summer 2021. There has been a lot of interest so I will provide a brief ...Read more

Sound Advice: Upgrade your office with Bluetooth headset for phone calls

Q. I have a job where I am on the phone frequently and need to take notes, so I need my hands free for this purpose. I work in a medical field where privacy is required, so I can’t use a speakerphone because I never know if confidential information will be announced by the other party. I have earbuds that work for phone calls, as well as ...Read more

Sound Advice: Best products for cleaning CDs and other electronics

Q. I could not find a cleaner for my CDs and a salesman recommended eyeglass cleaner as a substitute. Since then I have been using the eyeglass cleaner to clean my CDs and it does not seem like it is harming them. Is using eyeglass cleaner on my CDs OK? What do I do if the CDs are scratched and they skip?

—B.D., Minneapolis

A. The eyeglass ...Read more

Sound Advice: Useful reader feedback and a great kitchen gadget

Q. I recently read your column about the Ryobi inflator and the higher prices in different areas of the country. I had the same experience with the Ryobi inflator at my local Home Depot. I ended up buying one on eBay for $21.99, brand new with free shipping.

What I found interesting is that it was shipped to me from a Home Depot in Ohio, as you...Read more

Don Lindich/Don Lindich/TNS

Sound Advice: DVD player can also be used for CDs

Q. We are having an issue with our Bose Wave radio/CD system. It has an add-on that provides an additional three CD capability. The slot in the radio itself is playing the CD properly, but the three CD add-on unit has begun to make spinning, sputtering, skipping noises. After a period of time it seems the CD begins to play normally.

In checking...Read more

Don Lindich/Don Lindich/TNS

Sound Advice: Online products can have different prices depending on where you live

Q. I was excited to read your column about portable tire inflators. I often have to add air to my bike tires, so the idea of getting a $20 inflator I could use with my Ryobi battery system was very attractive. Yesterday I went to my local Home Depot and saw that the $20 inflator was for inflating air mattresses. The high-pressure inflator was $...Read more



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