I got a chance to test a lot of systems over the past
few months. Each system was given a week of general use, then measurement, then
more listening. Here is my tally sheet. Please note that every system here did a great job. You couldn't go wrong with any of them.
Best Dressed:
I don't want to cop out, but it's a tie between the Polk and the PSB. The black piano finish on the Polk is almost unheard of at this price point. The light wood grain finish on the PSBs is one of the nicest I've seen, especially at this price point.
Best Form:
The Velodyne Decos are certainly going to get the most attention. They styling is simply . . . different. At first I was a little put off, but I really have grown to like it. Everyone who saw them commented on how cool they look.
Best Sound:
To me the PSB were the best sounding speakers here. Now, they didn't have the lowest THD, but measurements aren't everything. The speakers are much larger than some here, so if
the PSBs are too big for you , I would choose the RBHs or Polks.
Tech Specs:
After all the computer crunching this is where the chip fell:
Manufacturer |
Size Ranking |
THD @ 90 dB - 2" |
THD @ 110 dB - 1 Foot |
Frequency Response 200
Hz+ |
Velodyne Deco |
4 |
7 |
2 |
5 |
Atlantic Technology 170 |
6 |
2 |
6 |
4 |
Canton Movie MX-10 |
~1~ |
5 |
7 |
3 |
Klipsch Quintet |
2 |
3 |
~1~ |
6 |
PSB Alpha |
7 |
6 |
3 |
~1~ |
RBH Compact Theater |
3 |
~1~ |
5 |
7 |
Polk RM7200 |
5 |
4 |
4 |
2 |
110 dB Torture Test
Ok, so no one really listens to their movies at 80 dB right? While listening to a movie, I placed an SPL meter at the speaker location, and recorded the maximum dB at the speaker (6"). It was right around 113
dB. Considering a 6 dB drop for 3 feet, that's a 12 dB drop for 6 feet and a 24
dB drop at 12 feet, so it's not as loud as you think (however, room gain
plays a factor at the listening position). Even though putting out a single
sine wave is much more stressful than the same loudness for the complete
spectrum, I decided to see what these speakers could do full bore. I tested
them all with 1 kHz sine waves, 110 dB, at 1 foot distance from the speaker. You will notice how well the Klipsch did here. The horn speaker is
reknown for volume, and the Klipsch easily reached 110 dB.
Manufacturer |
THD @110dB/ 1ft |
110 dB Reached? |
Velodyne Deco |
1.52 % |
Yes |
Atlantic Technology 172 |
4.16% |
Yes |
Canton Movie MX |
5.4 % |
No (102 dB max) |
Klipsch Quintet |
0.798 % |
Yes |
PSB Alpha |
1.94 % |
Yes |
RBH Compact Theater |
3.02 % |
Yes |
Polk RM7200 |
2.67 % |
Yes |
Average
|
2.79% |
|
As you can see, THD changes
drastically with decibels. At about 3% THD, you can really notice the ringing in the adjacent harmonics. You
can see now the advantage the Klipsch has with the horn loaded tweeter. This is a good demonstration of the difference between larger speakers (towers) and your average bookshelf speaker. The average THD at 110 dB was 2.79%.
This is one of the reasons why reading off the frequency response from the package isn't the end all. Listen to the speakers at the volume that you plan on listening to them. Size
does make a difference.
Enjoy, now maybe I can have the guest room back?
- Brian
Weatherhead -
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