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Taron & Andrew Lissimore
|[caption id="attachment_589" align="alignright" width="300" caption="Harbeth HLP3ES-2 Speaker Frequency Response"][/caption] Let's have a look at one of my Harbeth HLP3ES-2 speakers. As you can see the response of these speakers is fairly flat from 125 hZ to 20 kHz. This is a small two-way speaker, so you don't expect great bass extension, and you can see the fairly rapid loss of lows below 125 Hz, which is 10dB down by the time you get to 63 Hz.|
|[caption id="attachment_590" align="alignleft" width="300" caption="Ruh roh! Something's wrong with this speaker!"][/caption] Unfortunately, I've also got a sick speaker --- that's been bugging me since it traveled last --- so I measured it. Yup, sure enough, something's wrong. Odd that it has any highs at all; I was suspecting a blown tweeter but because it still has some highs I thought maybe one of the crossover components lost a connection with all the rattling around during shipments. Regardless, this handy little acoustic analyzer made it very simple to see the something was wrong immediately, and now before I send it in I can send a snapshot of the problem.|
|[caption id="attachment_592" align="alignright" width="300" caption="The Boaston Acoustics Duo-i plus sounds pretty darn good."][/caption] Let's measure some other stuff. How about the Boston Acoustics Duo-i plus iPod dock/clock radio, it sounds pretty darn good and has bass and treble controls that we can play around with. I docked the company iPod and played some pink noise with all the controls set to neutral.|
|[caption id="attachment_594" align="alignleft" width="300" caption="BA Duo-i plus with all controls set at neutral."][/caption] As you can see, this little unit is flat within roughly 6dB from about 80 Hz to 16 kHz, and then it starts to wander a bit.|
|[caption id="attachment_595" align="alignright" width="300" caption="BA Duo-i plus with bass and treble controls at max."][/caption] I then set the bass and treble controls up to maximum and remeasured. You can easily see the lows are up about 5dB, and the highs are up about 10 dB.|
|[caption id="attachment_597" align="alignleft" width="300" caption="BA Duo-i plus with bass and treble controls at minimum."][/caption] I then turned both tone controls down and remeasured. Now you can see about a 5 dB cut in both the bass and treble.|
|[caption id="attachment_599" align="alignright" width="300" caption="Duo-i plus up agains a wall with additional gain in lows resulting."][/caption] Lastly, I set all controls to neutral and pushed the unit up against a wall. Here you can see the 3dB gain in low frequencies do to reinforcement from the proximity of the wall. Just exactly what you'd expect ... cool, this little gadget works good.|
|[caption id="attachment_602" align="alignleft" width="300" caption="The Skullcandy Pipe ruuns on 4 AA batteries."][/caption] What else can we measure? How 'bout the Skullcandy Pipe? You would think it would be abysmal.|
|[caption id="attachment_603" align="alignright" width="300" caption="The Pipe response is flawed, but what did you expect?"][/caption] I must say, I was really surprised how good the Pipe sounds for it's size. Sure, it's about as good as my blown Harbeth speaker, but that's not bad considering it's about the size of a rolled up dinner napkin. I just might have to get one of these for my 13 year old daughter this Christmas.|