Sound

And now there are three Monster Turbine in-ear headphones: the original and still great Turbine ($180), Pro Gold ($300) and now Pro Copper ($400). Which one sounds the best?

From the outside the three Turbines' earpieces look the same, differing only in the plated color finish; the standard Turbine's look is, cosmetically at least, my favorite. Its black chrome is the most understated, the Pro Gold is finished in gold, and the new Pro Copper is, you guessed it, copper.

All three Turbine metal earpieces feel solid and sturdier than most in-ear headphones, and my fears that the metal construction would adversely affect comfort in the winter months turned out to be a false alarm.

The Turbines are also heavier than the other in-ear models I've tested, but overall comfort is average, and the generous assortment of eartips included with the Turbines go a long way to toward insuring the best possible eartip-to-ear-canal seal. Like every in-ear headphone I've ever used, if you don't get a proper seal sound quality suffers.

The Copper and Gold models come with two really nice travel pouches, and get this: a one-time, no-questions-asked replacement guarantee. So when you break them you automatically get a new one. Sweet!

But this report will focus on the sound differences between the three models. I still love the Turbine, it's a seriously powerful in-ear headphone, and in early 2009 it immediately became my reference, displacing my trusty old, and more expensive Etymotic ER-4 in-ear headphones. … Read more

Plugging your headphones into your computer or receiver's headphone jack won't produce the best possible sound. Why? The embedded headphone "amp" is probably just a good-enough chip amp. It may sound acceptable, but nothing like what you'd hear from a properly designed dedicated headphone amplifier.

Sure, if you have a set of $50 or $100 headphones, it doesn't make a lot of sense to drop $400 on a dedicated headphone amplifier.

But if you have something closer to the sort of world-class headphones I write about from time to time, you'd be foolish not to take the plunge. You've already made a substantial investment in headphones, but you're not getting all the sound quality you paid for.

Head-Direct's EF5 Desktop Tube Hybrid Amp ($399) is a two-box affair; one chassis is the power supply, the other is the amp itself. Each unit is solidly built and fairly compact: just 4.33 inches wide, 1.97 inches high, and 10.63 inches deep.

The amp uses a single (RCA 12AU7) vacuum tube. The amp takes about a minute to come to life after turning it on, and when the top panel's blue LEDs light up you know it's ready to play. Plug the headphones into the 6.3mm jack, adjust the volume, and you're good to go.

I listened to the EF5 with a lot of headphones, everything from my Grado RS-1, Sennheiser HD-580, Monster Turbines, Jerry Harvey JH13s, and Head-Direct's very own HE-5.

The Drive-By Truckers' excellent "Live From Austin TX" CD had tremendous presence and impact. Patterson Hood's straight from the heart vocals really cut through, and ditto for the raucous guitars. Sweet!… Read more

I occasionally get e-mails asking about cheap and easy ways to soundproof a listening room. Readers want to minimize the amount of bass and sound leaking into neighboring apartments or rooms in a house from their home theater.

Bona-fide soundproofing is neither cheap or easy. Anything short of building a "floating" (isolated) recording studio type listening room won't totally soundproof a room. You see, a floating room's ceiling, walls, and floor are acoustically and structurally isolated from its surroundings. Prices vary, but plan on investing at least $10,000 for a professionally installed floating room. After the floating room construction techniques, you can attain more limited success with double sheetrock on the walls. That is, install new double sheetrock walls with an air gap between them and the original walls. Double sheetrock can make a big difference, but it's still far from a cheap or easy solution.

A friend put a layer of lead sheeting under his apartment's finished wood floors to reduce bass transmission to the floor below. It worked, but I'm not so sure about the health concerns from living around that much lead.

But I do have a few tips to reduce sound leakage from one room to another, or between floors of a house or apartment that won't break the bank.

Before we go any further, let's define our goals: sound isolation isn't the same thing as improving room acoustics (I'll cover that in another blog).

Sound is transmitted from one room to another either through structure borne vibrations (wall, ceiling, or floor movement), or through the air. Thick carpets or wall pads won't do much in the way of soundproofing, but they may improve sound quality in the room.… Read more

Most of the tech products you buy are disposable.

According to the U.S. Environmental Protection Agency, the average cell phone life span is 18 months. One hundred and twenty five million phones are discarded every year, resulting in more than 65,000 tons of waste. A lot of folks get a new computer every few years.

Bought a new home theater receiver last year? Great, but its HDMI 1.3 connection is about to be superceded by HDMI 1.4. That won't reduce the receiver's usability, at least in the near term, but it's unlikely you'll want to keep it around for the long run.

Audio Research's CD8 Reference player was designed to last a long, long time. It's also one of the least "digital"-sounding CD players I've ever used. That sort of statement is usually followed by something like, "CDs now sound a lot more like LPs." That's not the case here, but the CD8 is considerably more musical than other state-of-the-art CD players. You can read my complete review on the Home Entertainment Web Site.

Audio Research's CD8 Reference player uses vacuum tubes to amplify the converted-to-analog signals. That's hardly a new idea, as designers started sticking tubes in CD players in the 1980s. But most of those players used just a pair of tubes, typically as a "buffer" output stage. The CD8's tubes are configured much as they are in Audio Research's very best stereo preamplifier, the Reference Pre ($12,000). Measuring an imposing 19 inches long by 5.25 inches high by 15.3 inches wide, the CD8 is the size of a pretty serious power amplifier.

The CD8 doesn't have a disc-loading drawer; the drive mechanism is located under a sliding door on the top panel. Disc loading involves placing a small magnetic clamp on the disc. I like the "hands-on" approach, maybe because it's more like playing an LP.… Read more

I read Geoffrey Morrison's review of the Olive 4HD music server on the Home Entertainment Web site with great interest, because I recently heard the 4HD at a friend's house. The review provides a lot of information that I'm not covering here.

It's a cool-looking device, and I really like that it can be used without being hooked up to a computer. It's more like a CD player with a built-in 2TB hard drive.

There's a Gigabit Ethernet port and a Wi-Fi module if you're into the home network thing, and a free … Read more

In the 1970s, the U.S. audio market was dominated by American-made products. Case in point: the original Dynaco A-25 speaker, introduced at the end of the previous decade, sold really well. The oft-cited sales number was something like 1,000,000 speakers sold.

Annandale Acoustics took the original Dynaco as the inspiration for its A-25 XL2. It's not a replica per se, more like the A-25 XL2 is a pumped-up version of the original concept. The company is selling the speaker directly, with a 30-day in-home audition.

The A-25 XL2, like the original A-25, is a large two-way … Read more

Dynamic range compression and lossy file compression are completely different things. What's the difference?

Dynamic range compression squashes soft-to-loud volume shifts. This form of compression has been used by recording, mixing and mastering engineers for decades.

Other than bona-fide audiophile recordings, most of the music you hear has been dynamically compressed--which isn't necessarily a bad thing, as dynamic range compression adds punch, presence, and impact to music.

It's just that over the past decade or so the trend is to overcompress dynamics, so not only has music lost most of its natural soft-to-loud dynamics, but nuance and subtle detail are missing as well. The loud-all-the-time aesthetic is boring.

Recordings with less compression have lower (quieter) overall volume, so if you go from listening to maximally compressed contemporary recordings to something with less compression you need to turn up the volume to compensate for the difference.

As a consumer of music, you don't have the option of buying uncompressed music. If the engineers squashed the soft-to-loud dynamics out of the new Lady Gaga record there's no way of getting them back. Once sound is compressed, you can't decompress it. If you want to hear music with less compression, buy original pressings of 1960s or 1970s LPs. Yes, some of those will be compressed, but less than contemporary recordings. … Read more

Long-range acoustic devices (LRADs) were developed by American Technology Corporation, and are capable of emitting a maximum volume of 151 decibels (that's super loud), within 30 degrees of where the device is pointing. That sort of volume is loud enough to be painful and may cause permanent hearing damage. The LRAD's highly directional sound reduces the risk of exposing bystanders to harmful audio levels.

At lower volume, LRADs can be used as high-powered speakers, "to communicate effectively to large public gatherings, in search and rescue operations, and to defuse deadly SWAT situations." ATC claims LRADS are … Read more

If you think all high-end products are stupid expensive or mammoth monstrosities, the MiniWatt vacuum tube integrated amplifier should change your mind. What differentiates high-end gear from mass market technology is performance; mainstream manufacturers know sound quality isn't much of a priority for most buyers, so they build their products to sound just good enough.

By high-end standards at least, the MiniWatt is dirt cheap, just $229 (shipping is $40). And measuring just 5 by 4 inches, the little guy can fit anywhere. Powerful it's not, just 2.5 watts for each channel, but that should be plenty … Read more