Ferrite Magnet Audio Nirvana vs. Fostex and Hemp Acoustics For 8 and 6.5 inch models
| Audio
Nirvana Standard 8 |
Audio
Nirvana Super 8 |
Audio
Nirvana Super 8 Cast Frame |
Fostex
FE206EN |
Hemp
Acoustics FR8C |
Audio
Nirvana Super 6.5 |
Audio
Nirvana Super 6.5 Cast Frame |
Fostex
FE166EN |
Fostex
FE167E |
|
| Price | $128/pr | $158/pr | $188/pr | $185/pr | $260/pr | $138/pr | $168/pr | $134/pr | $132/pr |
| Size | 8 inch
200mm |
8 inch
200mm |
8 inch
200mm |
8 inch
200mm |
8 inch
200mm |
6.5 inch
165 mm |
6.5 inch
165 mm |
6.5 inch
165 mm |
6.5 inch
165 mm |
| Phase Plug | no | yes | yes | no | no | yes | yes | no | no |
| Cone Material | paper | paper | paper | paper | hemp/paper | paper | paper | paper | paper |
| Surround Design | accordian | accordian | accordian | reverse roll | accordian | accordian | accordian | reverse roll | reverse roll |
| Surround Material | treated cloth | treated cloth | treated cloth | treated cloth | treated cloth | treated cloth | treated cloth | treated cloth | treated cloth |
| Frame Material | stamped steel | stamped steel | cast aluminum | stamped steel | cast aluminum | stamped steel | cast aluminum | stamped steel | stamped steel |
| Magnet Material | ferrite | ferrite | ferrite | ferrite | ferrite | ferrite | ferrite | ferrite | ferrite |
| Impedance | 8 ohms | 8 ohms | 8 ohms | 8 ohms | 8 ohms | 8 ohms | 8 ohms | 8 ohms | 8 ohms |
| SPL (Efficiency) | 96 dB | 96 dB | 96 dB | 96 dB | 95 dB | 94 dB | 94 dB | 94 dB | 94 dB |
| Rated Input (Power Handling) | 30 watts | 30 watts | 30 watts | 30 watts | 45 watts (?) | 30 watts | 30 watts | 22 watts | 22 watts |
| Frequency Response | Fo-20k | Fo-20k | Fo-20k | Fo-20k | 40-20k (?) | Fo-20k | Fo-20k | Fo-22k (?) | Fo-22k (?) |
| Driver Weight | 7.8 lbs
3540 gms |
7.8 lbs
3540 gms |
8.2 lbs
3690 gms |
7.0 lbs
3200 gms |
3.3 lbs
1500 gms |
7.6 lbs
3435 gms |
8.0 lbs
3650 gms |
3.5 lbs
1600 gms |
2.9 lbs
1320 gms |
| Magnet Weight | 3.2 lbs
1455 gms |
3.2 lbs
1455 gms |
3.2 lbs
1455 gms |
2.3 lbs
1067 gms |
1.2 lbs
550 gms |
3.2 lbs
1455 gms |
3.2 lbs
1455 gms |
1.3 lbs
600 gms |
0.8 lbs
362 gms |
| Voicecoil | 1.4 inch
35.5 mm |
1.4 inch
35.5mm |
1.4 inch
35.5mm |
1.4 inch
35.0 mm |
1.0 inch
25.4 mm |
1.2 inch
30.5 mm |
1.2 inch
30.5 mm |
1.0 inch
25 mm |
1.0 inch
25 mm |
| Fs (Free Air Resonance) | 39 hz | 37 hz | 42 hz | 45 hz | 45 hz | 46 hz | 48 hz | 53 hz | 52 hz |
| Re | 7.2 ohms | 7.2 ohms | 7.2 ohms | 6.8 ohms | 6.2 ohms | 7.2 ohms | 7.2 ohms | 7.2 ohms | 7.1 ohms |
| Mms | 13.5 g | 11.7 g | 11.5 g | 12.2 g | 9.0 g | 7.66 g | 7.9 g | 6.8 g | 6.68 g |
| BL | 11.0 Tesla/M | 9.3 Tesla/M | 11.0 Tesla/M | 10.6 Tesla/M | Not given | 8.6 Tesla/M | 7.8 Tesla/M | 7.65Tesla/M | 6.82 Tesla/M |
| Qms | 4.86 | 3.72 | 3.38 | 4.6 | 2.5 | 3.03 | 2.9 | 3.43 | 4.63 |
| Qes | .20 | .23 | .18 | .19 | .50 | .22 | .33 | .27 | .33 |
| Qts | .19 | .21 | .18 | .19 | .40 | .20 | .29 | .25 | .31 |
| Vas | 72 liter | 95 liter | 73 liter | 71 liter | 95 liter | 36 liter | 25 liter | 37 liter | 36 liter |
| Eff/no | 2.2 % | 2.1 % | 3.0 % | 2.7 % | Not given | 1.6 % | 1.3 % | 1.7 % | 1.4 % |
| Xmax | 1.0 mm | 1.0 mm | 1.0 mm | .8 mm | 1.9 mm | 1.0 mm | 1.0 mm | 1.0 mm | 0.6 mm |