GR Research FG12 Servo - Home Theater Forum and Systems - HomeTheaterShack.com

 
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post #1 of 8 Old 11-27-12, 04:32 PM Thread Starter
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GR Research FG12 Servo

Specifications
Driver
12" high excursion with custom sensing coil

Driver materials
Treated paper with foam surround
Cast aluminum basket

Amplifier
370w RMS class A/B patented servo controlled

Dimensions
15-3/4"(W) x 15-3/4" (H )x 17"(D) - (18-1/2" D with grille)

Shipping Weight
80 lbs

Frequency Response
14 - 100 Hz (-2 dB @ 14 Hz)

Crossover slope
Selectable 12 or 24 dB / octave (PEQ and XLR versions)

Crossover range (Low pass)
25 - 120 Hz

Rumble Filter (High pass )
20Hz 18 dB / octave

Phase response
90 degrees phase shift at 20 Hz

Phase adjustment
0 - 180 degrees continuously variable

Bass damping factor settings
high (Q=0.5), med (Q=0.7), and low (Q=1.1)

Finishes
Available in honey oak vinyl or black oak vinyl
(Piano Gloss available in signature edition only)

Warranty
5 years warranty on driver and 2 years on electronics

30 day satisfaction guarantee


Manufacturers Published Measurements


Frequency Response

Max Output Before Compression

Spectral Decay


Group Delay


Waterfall


Spectrogram


Harmonic Distortion


Click the Methods button for the REW notes from each individual frequency

Measurement Methods

16 Hz
65536-point spectrum using Rectangular window and no averaging
Input RMS 84.5 dB
Distortion at 16.1 Hz, -22.8 dB FS based on 8 harmonics:
THD 10.5386 %
THD+N 45.1665 %
2nd harmonic 9.4535%
3rd harmonic 3.5828%
4th harmonic 2.0572%
5th harmonic 1.4599%
6th harmonic 0.6421%
7th harmonic 0.9423%
8th harmonic 0.4653%
9th harmonic 0.9884%


20 Hz
65536-point spectrum using Rectangular window and no averaging
Input RMS 86.2 dB
Distortion at 20.1 Hz, -20.4 dB FS based on 8 harmonics:
THD 10.2556 %
THD+N 24.5709 %
2nd harmonic 9.4107%
3rd harmonic 3.0110%
4th harmonic 1.8900%
5th harmonic 1.2771%
6th harmonic 0.5557%
7th harmonic 1.1824%
8th harmonic 0.4066%
9th harmonic 0.6893%


25 Hz
65536-point spectrum using Rectangular window and no averaging
Input RMS 92.4 dB
Distortion at 24.9 Hz, -15.3 dB FS based on 8 harmonics:
THD 10.0319 %
THD+N 52.2727 %
2nd harmonic 9.4164%
3rd harmonic 2.3197%
4th harmonic 1.4482%
5th harmonic 1.4030%
6th harmonic 0.6853%
7th harmonic 1.1188%
8th harmonic 0.4571%
9th harmonic 0.7698%


31.5 Hz
65536-point spectrum using Rectangular window and no averaging
Input RMS 95.2 dB
Distortion at 31.6 Hz, -11.3 dB FS based on 8 harmonics:
THD 9.4596 %
THD+N 20.4769 %
2nd harmonic 8.9471%
3rd harmonic 2.4688%
4th harmonic 0.8406%
5th harmonic 1.2487%
6th harmonic 0.1981%
7th harmonic 0.8678%
8th harmonic 0.2203%
9th harmonic 0.4807%


40 Hz
65536-point spectrum using Rectangular window and no averaging
Input RMS 101.9 dB
Distortion at 39.9 Hz, -4.5 dB FS based on 8 harmonics:
THD 8.2066 %
THD+N 18.0393 %
2nd harmonic 7.9316%
3rd harmonic 1.2407%
4th harmonic 1.0503%
5th harmonic 0.9829%
6th harmonic 0.1959%
7th harmonic 0.7569%
8th harmonic 0.1446%
9th harmonic 0.4440%


50 Hz
65536-point spectrum using Rectangular window and no averaging
Input RMS 102.5 dB
Distortion at 49.9 Hz, -4.1 dB FS based on 8 harmonics:
THD 6.5836 %
THD+N 26.3948 %
2nd harmonic 3.3385%
3rd harmonic 3.7088%
4th harmonic 2.0987%
5th harmonic 2.5738%
6th harmonic 1.5131%
7th harmonic 1.8636%
8th harmonic 0.8310%
9th harmonic 0.9803%


63 Hz
65536-point spectrum using Rectangular window and no averaging
Input RMS 102.4 dB
Distortion at 63.1 Hz, -4.0 dB FS based on 8 harmonics:
THD 7.0776 %
THD+N 20.1273 %
2nd harmonic 4.7077%
3rd harmonic 2.0823%
4th harmonic 2.2461%
5th harmonic 2.0191%
6th harmonic 1.8041%
7th harmonic 2.1711%
8th harmonic 1.7517%
9th harmonic 1.8533%


80 Hz
65536-point spectrum using Rectangular window and no averaging
Input RMS 102.6 dB
Distortion at 80.1 Hz, -3.8 dB FS based on 8 harmonics:
THD 3.5731 %
THD+N 7.9012 %
2nd harmonic 3.5252%
3rd harmonic 0.4400%
4th harmonic 0.1775%
5th harmonic 0.1740%
6th harmonic 0.1514%
7th harmonic 0.1439%
8th harmonic 0.1396%
9th harmonic 0.1448%

Regards,
Dale Rasco



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Last edited by Dale Rasco; 12-09-12 at 05:37 PM.
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post #2 of 8 Old 12-03-12, 02:51 PM
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Re: GR Research FG12 Servo

thats the 12 inch rythmik with the gr driver correct?
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post #3 of 8 Old 12-03-12, 03:27 PM Thread Starter
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That is correct but I need to add some additional measurements based on the filter settings, etc. just wanted to make sure that I mentioned that. I should have those up later today or tomorrow.

Regards,
Dale Rasco



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post #4 of 8 Old 12-03-12, 05:48 PM
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Re: GR Research FG12 Servo

cool cant wait to see the addotional info.
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post #5 of 8 Old 12-03-12, 06:03 PM Thread Starter
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Re: GR Research FG12 Servo

I'll be doing the same thing for the Rythmik 15 and the SVS PB13 Ultra as well.

Regards,
Dale Rasco



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post #6 of 8 Old 04-22-13, 09:02 AM
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Re: GR Research FG12 Servo

Are some of the images down?
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post #7 of 8 Old 01-07-14, 09:37 AM
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Re: GR Research FG12 Servo

Quote:
follz wrote: View Post
Are some of the images down?
seems like Frequency Response and Max Output Before Compression are missing.

You can see the frequency response in the Harmonic Distortion graph (I think)
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post #8 of 8 Old 01-17-14, 10:01 PM
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Re: GR Research FG12 Servo

Dale, can you repost the Frequency response and Max Compression charts for this sub?

Knowing that this sub is not a SPL monster, how does this sub compare with other 12" driver subs?
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