Frequency Response what does it mean??

[petenad]

Frequency Response:
On-Axis ±2 dB from 51 Hz - 20 kHz
30° Off-Axis ±2 dB from 51 Hz - 15 kHz
Sensitivity - Room / Anechoic 96 dB / 93 dB

I'm sure this information is posted in here somewhere but I'm older and suffer form computer rage (aka Roadrage) I just would like to know what this means in english please.

[Sir Terrence]

Originally Posted by petenad

Frequency Response:
On-Axis ±2 dB from 51 Hz - 20 kHz
30° Off-Axis ±2 dB from 51 Hz - 15 kHz
Sensitivity - Room / Anechoic 96 dB / 93 dB

I'm sure this information is posted in here somewhere but I'm older and suffer form computer rage (aka Roadrage) I just would like to know what this means in english please.

Taking what you have given here, it means that your speakers on axis response(the frequencies it covers) varies only one decibal either +1 or -1 from 51hz-20khz in the anechoic chamber(good performance). Measurements taken at a 30 degree angle off axis show a 51hz to 15khz, with no more than a +1 or -1 variation, which shows that your tweeter is beaming(highly directional) above 16khz. Sensitivity shows how loud the speaker can play with one watt(or whatever the tester decides) at a certain distance away from the speaker in a anachoic chamber and in a room. Your speakers are more efficient in a room with walls, than in a room where there are no reflections.(that is usually the case anyway). I would rate this as a very good speaker in terms of measurements.

I hope this helps!

[Big Daddy]

Perhaps this diagram helps.

Off-Axis Radiation

As can be seen in the above diagram, high frequency sound waves have a narrower off-axis response and low frequency sound waves have a much wider off-axis response. That is why you can stand completely to one side of an 8" diameter woofer and still hear bass frequencies like you were in front, but lose midrange or higher frequencies.

It is said that the higher frequencies sound waves behave like headlights or flashlights and low frequency sound waves behave like ripples of water waves in a pool. This is why tweeters are shaped like domes. A curved diaphragm pushes high frequency sound waves in a way that aides dispersion.

[petenad]

Thank you for the info I have been educated again

[jomari]

Originally Posted by petenad

Frequency Response:
On-Axis ±2 dB from 51 Hz - 20 kHz
30° Off-Axis ±2 dB from 51 Hz - 15 kHz
Sensitivity - Room / Anechoic 96 dB / 93 dB

I'm sure this information is posted in here somewhere but I'm older and suffer form computer rage (aka Roadrage) I just would like to know what this means in english please.

a little bit more information,

on the frequency response part,

On-Axis ±2 dB from 51 Hz - 20 kHz, +- 10db - this means that the speaker can produce sound from the 51hz to 20khz frequency. if this follows with a db, then it would indicate how farther the speaker can perform doing so...within the said db level.

ive added on the +-10db as a point of reference for most speakers specs... this is important because it tells us the parameters the speaker performs efficiently AT these frequency levels. a very interesting and quite simple explanation follows in the said article below...

frequency response via axiom audio