Sometimes you need a bit more power than those shiny white earbuds that come with your iPod can offer.

That’s where an entire audio sub-industry has sprung up, catering entirely to iPod owners who want to “dock” their music box somewhere and jam to a room-filling sound that’s not mashed into their ears.

Blast and The Boston Globe recently tested five of these docks: the Altec Lansing inMotion Max at $199, the Logitech Pure-Fi Express Plus for $78, the compact iHome iH4B for $39.99, the Cambridge SoundWorks i765 for $299, and Wayland-based Sprout Creation’s all-wood Vers 2X at $199.

As a bonus, Blast also tested the Boston Acoustics Duo-I at $199 and the iHome iH51BR at $149.

For professional advice, we turned to Dariusz Dobrolinski, is co-owner of the tiny yet historic Q Audio store on Vassar Street in Cambridge, which claims to be the worlds smallest hi-fi store and one of the original distributors of CD players in the US in the early 80s. Dobrolinski said the Altec Lansing inMotion Max was the best item on the list, and we agreed.

“It sounded the richest,” Dobrolinski said. He warned us not to jump at the deepest bass or the highest treble, which some inexpensive systems tend to crank up to make up for their lower quality components.

“If you want to buy a docking system, don’t look for something that has bass and sizzles, it may impress you, but later on you will notice you don’t get the midrange and that’s where all the instruments and all the voices are,” Dobrolinski said. “Bass is not critical unless you want to fill a huge room, but none of those systems are designed for huge rooms.”

The Altec Lansing and Cambridge SoundWorks models were all very similar, though. They sounded great, look great, and come from brand names that are known for generally building their products to high quality specifications.

The iHome name has gained a lot of ground in the last three years. You often see these functional alarm clock iPod docks in both luxury hotels and college dorms. They generally sound good and have useful wakeup features like dual alarm clock times and, of course, the ability to wake up to your favorite songs blasting from your nightstand. The iH4b’s compact size and low price makes it a great value for dorm rooms and bedrooms. It has a good sound on a small footprint.

The Vers 2X is a great choice people who want something different. It doesn’t have a radio or really any other features except an iPod dock, but it’s an attractive, well-built speaker system.

Dobrolinski said that you should also focus on how the product looks. Style is important. He also said that you’ll want your dock to have a remote control so you’re not getting up all the time to tune it.

Individual products on Page 2

Logitech’s portable Pure-Fi Express Plus provides a solid and functional solution for playing your music and podcasts.

It is portable and can run off batteries or AC power, but that doesn’t mean you should drag it to the beach. The cloth grille and rotating knob don’t feel like they’d stack up too well against millions of miniature sand particles infiltrating their pores. (check this out for something different)

But for indoor or clean-outdoor use, you do get a compact sound machine with clear audio, decent if not great highs and the same thumping bass we’ve come to expect from every small form factor audio product on the market from a decent manufacturer.

The fact is, Logitech is turning into a strong player in the personal audio realm, putting out a variety of solutions. The Express Plus is remarkably similar in size, shape and sound as the Squeezebox Boom, which I just loved and has caused me to bookmark BBC Radio 1.

Older (by now, ancient) iPod models don’t fit as well in Pure-Fi Express Plus. At first, the remote control had no effect on my third generation iPod — it didn’t change the songs or play or pause, but I learned that was because the iPod wasn’t fully plugged in. Once I pushed down a bit, the remote worked, but that’s still a problem. The device doesn’t hold larger iPods in place very well. The Nano had no such problem, though.

The remote is a neat feature, though it doesn’t add a ton of value to the product. I tend to lose the mini-motes anyway.

I’m seeing these products for about $50 now. It’s worth it. You need something to dock your iPod, unless you just you to play your songs off iTunes. God help you.

This is one of a series of iPod-docking devices Blast is reviewing in April