What does all of this mean?

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Member Since: Dec 28, 2007

Type XLR Female Balanced
Frequency Response (+/-0.5 dB) 20 Hz to 50 kHz
Frequency Response (+/-3.0 dB) 20 Hz to 150 kHz
Input Impedance (Balanced) 1600 Ohms
THD+N (unwtd, 1 kHz @ +4 dBu Output, Unity Gain) < 0.003%
EIN (unwtd, 55dB Gain, 150 Ohms Input, 20Hz to 22 kHz) -126 dBu
S/N Ratio (Unity Gain, unwtd, Ref. = +4 dBu, 20Hz to 22 kHz) > 101 dB
Common Mode Rejection Ratio (1 kHz, 55 dB Gain) > 55 dB
Gain Control Range (+/- 1dB) -4 dB to 50 dB
Maximum Input Level (Unity Gain, 1 kHz @ 0.5% THD+N) +14 dBu
Signal Level LEDs
Red / Clip (+/-0.5 dBu)
Yellow (+/-0.5 dBu)
Green (+/-0.5 dBu)
Green (+/-0.5 dBu) +10 dBu (0 dBFS)
+4 dBu (-6 dBFS)
-8 dBu (-18 dBFS)
-14 dBu (-24 dBFS)

Phantom Power (+/-2 VDC) +48 VDC

i was wondering if someone could explain all of this because i want to learn what each of these mean and why they are good/ bad so i will know when shopping in the future.

thanks so much.

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Chief Cook and Bottle Washer
Since: May 10, 2002

Apr 06, 2008 10:59 pm

Oh Yikes!

Father forgive them for they know not what they ask.

An associates or bachlors in electronics would help. Specs are many different things depending on the integrity of the person publishing them. Some are qualified. Some are acurate. Some are pure fabrication.

The female XLR balanced is only telling you the type of connector to use. It could infer that the transmition uses phase reversal noise cancelation, although that is not clearly stated.

The first frequency response statement tells you that from 20hz to 50khz (a slightly larger audio range than normal hearing) will only vary 1 db throughout the entire range. 3 db is considered a doubling of volume.

The second frequency response statement tells you that from 20 to 150Khz ( a huge frequency spectrum for audio) may vary 3db. You can extrapolate that doubling of volume will only happen between 50Khz and 150khz. Your dog may get pissed off if ths passage is his or her favorite.

The imput impediance tells you what you can connect to the unit in terms of impediance. I know I didn't say much here, but it's a long story.

Total harmonic distortion plus noise is basicly a statement of how much noise or sound that is added by the unit itself, or generated in the unit in the process of doing whatever it does. Here they gave some defination of how they tested to get the number with the unweighted, 1khz @ ....... This is best used as a comparitive spec. You are looking for the unit with the lowest number. Caviot; This spec is often bent or unqualified to make it appear low. Very hard to compare apples to apples.

Equilivant Input Noise. How much noise is generaly created at the input of the unit. You want this number small obviously. A quiet room is about 50db on average. You can use this as a benchmark.

Signal to Noise ratio. (I'm getting typers cramp) You want this number big. It is saying that noise created by the unit will be 101db quieter that the music you want to hear.

CMRR. You want it big so you can impress your girlfriend. Sorry, I'm a soiled senior citizen. It has to do with how well the imput of the internal devices deal with signal.

Gain control range. How much volume control you have. Bigger is better in most cases.

Mazimum input level. How strong of a signal you can pump into the thing before it starts sounding bad.

The bulb information is how your bulbs will react to signal. Better to just watch the things and learn.

Db full scale. More about the bulbs. This one is ambigious. Depends on the waveform they used to test, yada yada. Better to watch and learn.

Phantom power. The unit will power a condensor microphone or other device using the common +48 volt direct current power.

I'm tired. Hope it helps.

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