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GRS Speaker Drivers

GRS is represented in the Load Forge catalog by 62 speaker drivers, covering 1" to 18". Resonance (Fs) spans 20.7–380 Hz and total Q (Qts) 0.36–2.04, so the range covers both compact sealed alignments and large vented subwoofers. Every entry below links to its Thiele/Small parameters and calculated sealed and bass-reflex box designs.

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Drivers
62
Diameter
1"–18"
Fs Range
20.7–380 Hz
Qts Range
0.36–2.04
Price Range
6.99–209.95

Filter GRS Speaker Drivers by diameter

8" 16 10" 10 12" 8 6.5" 7 15" 6 4" 4 4.5" 3 5.25" 3 3" 2 1" 1 5" 1 18" 1

All GRS Speaker Drivers — parameters & designs

Model Size Fs Qts Vas Price
NRT25-8 1" Extended Range Driver 8 Ohm 1" 380 Hz 1.32 0 L 24.95 EUR
3AS-4 3" 124 Hz 0.95 0.9 L 9.95 EUR
3FR-4 Full-Range 3" Speaker 4 Ohm 3" 145 Hz 0.85 0.6 L 6.99 USD
4" Woofer Surface Mount Poly Cone 4 Ohm 4SMP-4 4" 58 Hz 0.55 4 L 19.95 EUR
4" Woofer Surface Mount Poly Cone 8 Ohm 4SMP-8 4" 63 Hz 0.65 4 L 19.95 EUR
4AS-4 4" 131 Hz 1.48 1.4 L 14.95 EUR
4PF-8 4" Paper Cone Foam Surround Woofer 4" 137 Hz 1.94 1.1 L 9.99 USD
4FR-8 Full-Range 4-1/2" Speaker Pioneer Type A11EC80-02F 4.5" 127 Hz 0.7 1.7 L 15.99 USD
RSB901-1 4.5" 83.4 Hz 0.36 6.8 L 44.95 EUR
RSB901-1 Replacement Speaker Driver for Bose 901 4-1/2" 1 Ohm 4.5" 84.1 Hz 0.37 6.8 L 44.95 EUR
46AS-4 5" 140 Hz 1.97 2.1 L 14.95 EUR
5-1/4" Woofer Surface Mount Poly Cone 4 Ohm 5SMP-4 5.25" 62 Hz 0.54 6 L 29.95 EUR
5-1/4" Woofer Surface Mount Poly Cone 8 Ohm 5SMP-8 5.25" 55 Hz 0.44 6.5 L 29.95 EUR
5PF-8 5-1/4" Paper Cone Foam Surround Woofer 5.25" 162 Hz 2.04 1.4 L 10.99 USD
6-1/2" Woofer Surface Mount Poly Cone 4 Ohm 6SMP-4 6.5" 45 Hz 0.39 15 L 39.95 EUR
6-1/2" Woofer Surface Mount Poly Cone 8 Ohm 6SMP-8 6.5" 47 Hz 0.45 14.5 L 39.95 EUR
6AS-4 6.5" 84 Hz 1.39 8.4 L 12.45 EUR
6LPSW-4 6-1/2" Low Profile Subwoofer 4 Ohm 6.5" 48 Hz 1.08 7.6 L 18.99 USD
6PF-8 6-1/2" Paper Cone Foam Surround Woofer 6.5" 73 Hz 0.79 10.8 L 15.99 USD
6PR-8 6-1/2" Poly Cone Rubber Surround Woofer 6.5" 69 Hz 0.87 10.5 L 15.95 EUR
6PT-8 6-1/2" Paper Cone Pro Sound Woofer 8 Ohm 6.5" 94 Hz 0.72 9.5 L 20.99 USD
12PR-8 Woofer 8" 32 Hz 1.26 3.4 L 31.45 EUR
12SW-4 Subwoofer 8" 32 Hz 0.98 69.2 L 41.95 EUR
5PF-8 Bass-midwoofer 8" 100 Hz 1.4 0.1 L 8.95 EUR
69AS-4 8" 72 Hz 1.53 15.6 L 16.95 EUR
6PF-8 Bass-midwoofer 8" 82 Hz 0.95 0.2 L 17.45 EUR
8" Woofer Surface Mount Poly Cone 4 Ohm 8SMP-4 8" 38 Hz 0.39 37.7 L 49.95 EUR
8" Woofer Surface Mount Poly Cone 8 Ohm 8SMP-8 8" 41 Hz 0.46 32.6 L 49.95 EUR
8FR-8 Full-Range 8" Replacement Speaker Pioneer Type B20FU20-51FW 8" 45 Hz 0.56 37.1 L 17.99 USD
8PF-8 8" Paper Cone Foam Surround Woofer 8" 51 Hz 0.93 26.9 L 16.99 USD
8PR-8 8" Poly Cone Rubber Surround Woofer 8" 52 Hz 0.97 22.4 L 24.95 EUR
8PR-8 Bass-midwoofer 8" 52 Hz 1.11 0.8 L 24.95 EUR
8PT-8 8" Paper Cone Pro Sound Woofer 8 Ohm 8" 59 Hz 0.55 20.1 L 32.99 USD
8SW-4 8" Poly Cone Subwoofer 4 Ohm 8" 48 Hz 0.89 22.1 L 23.99 USD
8SW-4HE 8" High Excursion Subwoofer 4 Ohm 8" 24.9 Hz 0.45 31.7 L 59.99 USD
8SW-4HE-8 8" 24.9 Hz 0.45 31.7 L 84.95 EUR
NRT50-8 Woofer 8" 250 Hz 1.21 0.1 L 39.95 EUR
10" Woofer Surface Mount Poly Cone 4 Ohm 10SMP-4 10" 28 Hz 0.51 85 L 69.95 EUR
10" Woofer Surface Mount Poly Cone 8 Ohm 10SMP-8 10" 29 Hz 0.58 81 L 69.95 EUR
10PF-8 10" Paper Cone Foam Surround Woofer 10" 45 Hz 1.21 58.9 L 21.95 EUR
10PR-8 10" Poly Cone Rubber Surround Woofer 10" 40 Hz 0.97 57.2 L 29.95 EUR
10PT-8 10" Paper Cone Pro Sound Woofer 8 Ohm 10" 47 Hz 0.48 46.2 L 70.95 EUR
10SFPC-B 10" Square Frame Paper Cone Woofer Black 10" 35.5 Hz 0.66 94 L 61.45 EUR
10SFPC-W 10" Square Frame Paper Cone Woofer White 10" 34.1 Hz 0.67 82.7 L 24.99 USD
10SW-4 10" Poly Cone Subwoofer 4 Ohm 10" 43 Hz 0.93 39.6 L 39.95 EUR
10SW-4HE 10" High Excursion Subwoofer 4 Ohm 10" 25.2 Hz 0.5 60.6 L 66.99 USD
A25-10 Replacement 10" Woofer for Dynaco A25 6 Ohm 10" 30 Hz 0.37 90.6 L 109.95 EUR
12" Woofer Surface Mount Poly Cone 4 Ohm 12SMP-4 12" 28 Hz 0.51 133.1 L 89.95 EUR
12" Woofer Surface Mount Poly Cone 8 Ohm 12SMP-8 12" 28 Hz 0.56 127.4 L 89.95 EUR
12PF-8 12" Paper Cone Foam Surround Woofer 12" 38 Hz 1.93 112.4 L 59.95 EUR
12PT-8 12" Paper Cone Pro Sound Woofer with 3" Voice Coil 8 Ohm 12" 35 Hz 0.39 112.1 L 104.95 EUR
12SFPC-B 12" Square Frame Paper Cone Woofer Black 12" 36 Hz 0.83 166.2 L 100.45 EUR
12SFPC-W 12" Square Frame Paper Cone Woofer White 12" 31.2 Hz 0.7 154.3 L 32.99 USD
12SW-4HE 12" Paper Cone Rubber Surround High Excursion Subwoofer 4 Ohm 12" 22 Hz 0.43 80.4 L 75.99 USD
292-422 12" 30 Hz 1.06 112.7 L 29.99 USD
15PF-8 15" Paper Cone Foam Surround Woofer 15" 30 Hz 1.43 224 L 54.95 EUR
15PT-8 15" Paper Cone Pro Sound Woofer with 3" Voice Coil 8 Ohm 15" 28 Hz 0.41 242.1 L 54.95 EUR
15SSW-4HE 15" High Excursion Super Subwoofer 4 Ohm 15" 20.7 Hz 0.49 196.5 L 209.95 EUR
K-33-4 Replacement 15" Woofer for Klipsch Speakers 15" 32.2 Hz 0.52 274.1 L 179.95 EUR
RSRMO-8 Replacement Woofer for 15" Realistic Mach One 8 Ohm 15" 27.6 Hz 0.72 266.2 L 128.99 USD
S115V-LF-8 Replacement 15" Woofer for Yamaha Club Series S115V Speakers 15" 37.4 Hz 0.394 243.1 L 199.95 EUR
18PT-8 18" Paper Cone Pro Sound Woofer with 3" Voice Coil 8 Ohm 18" 23 Hz 0.54 475.7 L 129.95 EUR

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