Mystery Mic #2:
Can You Tell The Difference Between A
$15 Microphone and a $200 Microphone?
by Ed Ting
The Rode NT-1s ready for action
Can you tell the difference between a $15 microphone and a $200 microphone? I
was curious to find out. I set up this test, made some simple recordings, and
I'll let you decide. There's a link at the bottom that will tell you the result
after you've finished listening to the mp3 tracks. No peeking!
Microphone A: Realistic Highball 7 by Radio Shack
The Highball 7
I bought a pair of these inexpensive dynamic mics in college to help me while
I was learning to play the piano. They were all I could afford at the time. Once
a week I would lug the microphones and my trusty 1980 Teac V5RX tape deck to
Smith Music Hall at the University of Illinois (remember when tape decks used
to have mic inputs?) By the time I got there my arms would sometimes be so
tired from lugging all this stuff that I had to rest before playing.
In time, I could afford better equipment, and these have sat in my basement
now for 15+ years. Every time I hold a yard sale or visit ebay I think about
selling them, but something (sentimental value?) keeps holding me back. I
guess I'm keeping them.
While these aren't available any longer, they seem like farily typical cheap
dynamic microphones. You can find examples of these all over the place, and
there's no reason to believe these are any better or worse than the others.
The Highball 7s come with an attached cable which terminates in a 1/4" jack.
Microphone B: Rode NT-1
($299 list, about $200 street)
The Rode NT-1
Only a few short years ago, no one had ever heard of this Australian company. Now,
you see these things everywhere. It's even claimed that the NT-1 is the world's
best-selling studio microphone (purists, Shure's SM57 and SM58 are classified as
The NT-1 is a large-diaphragm (1") cardioid condenser mic. It's transformerless
and requires phantom power.
I set the microphones over the soundboard of my 1999 Yamaha C6 (6' 11") grand piano,
doing my best to approximate a 90 degree X-Y configuration.
I first played the same track of music through both sets of microphones. Next, I set
the mics up (again in X-Y) and spoke some text into them. A foam windscreen was used
during the vocal part of the test. Finally, I jangled some keys about 1 foot in front
of the microphones. Jangling keys is an acid test for recording chains; few can get
this exactly right.
The rest of the recording chain consists of a Behringer MX802A mixer, an Echo Audio
Darla sound card, and a Dell computer running Cool Edit Pro. Wav files were recorded
at 16 bit, 44,000 hz. Mp3 encoding was done by Musicmatch.
Experienced recording engineers probably have lots of questions at this point, so
I'll try to address the problems inherent in a test like this. Yes, there are issues,
and I am very aware of them.
1) Gain level. Levels were set using computer-generated tones played through
loudspeakers. The mics were set about 1 foot away from my Epos ES11 speakers.
This took more time than I expected. The Rode's have a relatively high output,
while the Realistics needed a lot of boost (typical of dynamic mics.) Thus,
it's possible that you're hearing more of the Behringer's preamp circuitry with
the Realistic's tracks.
2) I should note that some people do not care for these Behringer mixers. I do
have a Symetrix SX302 mic preamp (which I like a lot, by the way) but it only
accepts XLR and Euroblock inputs, which would have made adapting the Radio Shack
mics a real pain, so I stuck with the mixer because it's convenient. The Symetrix
has a smoother, cleaner output than the Behringer, which seems to impart a slight
harshness or grain to the sound. But, hey, what do you want for $100?
3) The tracks are Mp3s. I don't like compressed audio any more than you do, but
it was the only way to keep the files down to a managable size. A typical Mp3
contains only 1/10th to 1/12 the information in a typical wav file. Thus, Mp3s
tend to mask subtle differences like the ones you're trying to hear. Of all the
issues with this test, this one is probably the most serious. I can tell the
difference between the mics on these mp3s, but it's easier for me because I've
heard the raw wav files so many times.
The Realistics over the soundboard
Ready? Here are the tracks. I've tried to keep them fairly short to preserve bandwidth
(not to mention listener patience.) The music track is a portion of Chopin's B Major
Nocturne, and the spoken text is a sentence from one of my telescope articles. I am
an amateur pianist; please make allowances.
Mystery Mic #1:
Click here to see how you did!
E-mail me about pianos, telescopes, or recording
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