Ask S&V

Q I’m looking to buy a new receiver and was checking out Yamaha’s RX-A1030. A problem with that unit, however, is that it doesn’t appear to route signals from an optical digital input to its second-zone output—a feature that I require. (Other than that, the RX-A1030 has everything I need.) Is there another option on the market that can do this? Researching receiver specs is very tiring because specific info is hard to find. —Pete via email

Q My Onkyo HTS-S5400 home theater system has a front USB input where I plug in my iPhone to play music. I recently bought a new Sony Xperia L Android smartphone, however, and would like to use that for music playback instead. The Onkyo’s manual says the USB input is for iPhone/iPod playback only. Is there any special cable or app that I can use to play music through the system with my Android phone? —Mila Arasu 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 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 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 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?