Q I just bought a Sharp HDTV from Best Buy. When watching a dark scene from the TV series Grimm that I recorded with my DirecTV DVR, horrible black splotches suddenly appeared on the screen. Is this problem fixable?—Darryl Cameron via email
Q How much amplifier power is too much power? My speakers have a 75-to-100-watt RMS power rating and are connected to an entry-level Yamaha receiver, so it’s safe to say they aren’t being pushed anywhere near their potential. I plan to upgrade to separates in the near future, however, and need to know how powerful an amp I should buy. Should I go with too much amp (200 watts RMS per channel), or just enough (125 watts RMS per channel)? —Audiophile Noob via e-mail
Q What are the pros and cons of having a 2013 Panasonic plasma TV such as the TC-P55VT60 professionally calibrated? And what should I look for in a calibrator?
—Scott Oakley / via email
Q My friend uses an iPod touch to stream Pandora Internet Radio over a speaker system at his outdoor tiki bar but is having a problem with some songs playing louder than others. I have gone into his iPod’s General Settings menu and activated the Sound Check button, but that feature only seems to work for tracks played in iTunes. Is there an in-line device with 3.5mm connectors that can hook up to the iPod’s headphone jack to level the audio output?—J. Glemming / Calabash, NC
Q I’m wondering about the best setup to stream music from my computer. I currently use an Apple TV connected to an Onkyo receiver to stream Apple Lossless files from my Mac via AirPlay. Is there a better way? Should I add an outboard DAC or switch to a different network streaming device? —Rafael Cremonese / via e-mail
Q I’m in the market to buy a new receiver. The speakers I’m using are powered models that I plug directly into the back of the receiver. My question: Will it hurt or decrease the life of the speakers if I instead plug them into a regular AC outlet on my wall? New receivers I’ve checked out with features that I like do not provide AC outlets. —Bill Major / via email
You won't be hurting or decreasing the life of your powered speakers by plugging them into a regular wall AC outlet. Instead, you’ll be helping them.
Q Why at this time of near-perfect plasma TVs are there no sets available in the 65-to-85-inch range? I would like to consider one of the new Panasonic or Samsung models for my home theater but require a set with a screen size larger than 65 inches.—Steve Stolte / Cedar Rapids, IA
Q I have been reading A/V magazines for years, as well as conducting my own research, and am still a little confused about how to select the right amplifier to use with MartinLogan electrostatic speakers. The literature I’ve read clearly indicates that the ohm rating of a receiver is just as important, or more so, than its wattage per channel when considering an A/V receiver to pair with speakers. Does the ohm rating of MartinLogan electrostatic speakers make them incompatible with typical AVRs?
Q Can a videogame be played on a TV that’s set to the THX Movie mode rather than Game mode? What’s the difference? —Michael McGehee / Macon, Georgia
A The THX Movie mode on THX Certified displays is, in the company’s own words, a preset with “specific settings for gamma, color point, luminance, overscan, and other settings...intended to provide the optimum settings for playback of movie titles, but can be used for viewing other content as well.” In case there’s any lingering question here, “other content” would include videogames. But before you grab your controller, let’s review the pros and cons of using a TV’s Game mode.
Q How big a subwoofer would I need to produce good home theater-quality bass in a 3,100-cubic-foot room? Would the Hsu VTF-15H be up to the job, or is there a better choice in my target price range (around $1,000)? —Steven Winter / via e-mail
Q Can you explain what it is about an asynchronous USB DAC input on a receiver that would enable it to sound superior to an Ethernet connection streaming the same file over a home network? —Chris Hebner / Delano, MN
Got a tech question for Sound & Vision? Email us at AskSandV@gmail.com.
Q I have a legacy AV receiver (Integra DTR-7) and am considering replacing it with a separate preamp/processor and amplifier. I’ve noticed that some preamps only have RCA outputs, while other, more expensive preamps also have balanced XLR outputs. Is there a noticeable difference in the sound quality when using balanced XLR cables versus unbalanced cables? The length of the cables needed to connect the two units would only be 1 meter. —Ed Mendelson / via e-mail
Q My new TV has four HDMI inputs. Would I get better picture quality if I bypassed my receiver and hooked all the equipment up directly to the TV? I also plan to run a TosLink digital audio cable from the TV to the receiver for sound. Any issues there to consider? —Jose / Colorado Springs, CO
A Whether or not you’ll get better picture quality from your proposed setup depends on the video capabilities of the receiver you’ve been using to handle HDMI switching. A number of A/V receivers provide both high-quality video deinterlacing/scaling and an ability to pass-through 1080p signals with no degradation (this Marantz that Sound & Vision recently reviewed, for example). But some other models are known to reduce the chroma (color) resolution of signals passing through, or to clip above-white and below-black information at the extreme ends of the video brightness range.
Got a tech question for Sound & Vision? Email us at AskSandV@gmail.com.
Q I am looking to buy an amplifier and speakers manufactured someplace other than China.
Can you recommend some options? My budget is $2,000 total for both amp and speakers (tower or bookshelf). —Gopal Venkat / via email
I cut the political content from your question because I don’t feel that this column is the best forum to discuss those issues. That said, I’m happy to help you find gear in your price range that’s made someplace other than China.
Got a tech question for Sound & Vision? Email us at AskSandV@gmail.com.
Q I have a question about streaming audio from my PC to an A/V system located in another room. I want to be able to stream my vast collection of FLAC audio files along with Internet radio to an Integra DTR 5.9 A/V receiver. Running an Ethernet cable wouldn’t be my first choice; I have a strong Wi-Fi signal throughout the entire house and would like to use that instead for streaming.
I've looked at the Sonos and Nuvo systems and the WD TV Live box. Each of these options seems to have good and bad points. But I’ve also thought about buying an inexpensive laptop and connecting it to my A/V system with a portable USB DAC. Can you recommend a solution? —John Hanlon / Encinitas, CA