18 cm cone driver, for use as a long throw high fidelity woofer/mid woofer. Edge coated reed/paper pulp cone with perfectly matched moving parts, gives a smooth extended frequency response. Bump back plate together with very long and light copper clad aluminum voice coil, allow extreme excursion heavy copper ring below T shaped pole piece reduce nonlinear and modulation distortion. Extremely stiff molded injection basket keeps components in perfect alignment. Large windows in baskets both above and below the spider reduce sound reflection, airflow noise and cavity responses to a minimum.
                  

                Nominal Impedance                                                                                  -  8Ω

                Frequency Range                                                                                    -  45 – 3000Hz

                Short term power handling                                                                       -  250w

                Long term power handling                                                                       - 80w

                Sensitivity                                                                                                -  88.5db

                Voice coil diameter                                                                                  -  39mm

                Voice coil height                                                                                      -  18mm

                 Air gap height                                                                                         -  6mm

                 Linear coil travel                                                                                     -  22mm

                 Maximum coil travel                                                                                 -  35mm

                 Magnet weight                                                                                         -  0.65Kg

                 Total Weight                                                                                           -  1.91Kg

                 Voice coil resistance                                                                               -  5.9Ω

                 Voice coil inductance                                                                              -  0.67mh

                 Free Air Resonance                                                                                -  37Hz

                 BL                                                                                                            - 7.2

                 Moving mass                                                                                           - 14.0g

                 Effective piston area                                                                               -  136cm2

                 Vas                                                                                                         - 32liters

                 Qms                                                                                                        -  1.58

                 Qes                                                                                                         -  0.39

                 Qts                                                                                                          -  0.32

Classic paper cone with rubber surround, produce a well-behaved roll off, and reduced resonance problem.  1.5” diameter Voice coil 4 layer, gives a high-power handling and reduced compression.  Stiff and stable injection molded cast basket keeps the critical components aligned. This driver is the upgrade with todays technology of the woofer used in Dynaco A25 Speaker system which sold in excess of 1,000,000 pairs.

                Nominal Impedance                                                                                  -  8Ω

                Frequency Range                                                                                    -  20 – 1500Hz

                Short term power handling                                                                       -  300w

                Long term power handling                                                                       - 80w

                Sensitivity                                                                                                -  80db

                Voice coil diameter                                                                                  -  39

                Voice coil height                                                                                      -  14mm

                 Air gap height                                                                                         -  6mm

                 Linear Excursion (p-p)                                                                            -  8mm

                 Maximum Excursion                                                                                -  35mm

                 Magnet weight                                                                                        -  1.10Kg

                 Total Weight                                                                                           -  2.10Kg

                 Voice coil resistance                                                                               -  6.3Ω

                 Voice coil inductance                                                                              -  3.8mh

                 Force factor                                                                                            -  9.7

                 Free Air Resonance                                                                                -  25Hz

                 Moving mass                                                                                           -  37.4g

                 Effective piston area                                                                               -  350cm2

                 Vas                                                                                                         - 169liters

                 Qms                                                                                                        -  3.84

                 Qes                                                                                                         -  0.43

                 Qts                                                                                                          -  0.39

Classic hand coated paper cone and matching natural rubber surrounds produce a well-behaved roll off characteristic and reduced resonance. Long high temperature voice coil former gives low distortion and high-power handling.  Large magnet system provides high efficiency and allows maximum excursion without mechanical limitation. Cast basket keeps components in line.  

               Nominal Impedance                                                                                  -  8Ω

               Frequency Range                                                                                     -  30 – 3000Hz

               Short Term Power Handling                                                                      -  250w

               Long Term Power Handling                                                                       -  80w

               Sensitivity                                                                                                  -  89.5db

               Voice Coil Diameter                                                                                   -  39mm

               Voice Coil Height                                                                                       -  18mm

               Air Gap Height                                                                                           -  6mm

               Linear Coil Travel                                                                                      -  12mm

               Maximum Coil Travel (P-P)                                                                        -  26mm

               Magnet Weight                                                                                          -  0.64Kg

               Total Weight                                                                                              -  2.2Kg

               Voice Coil Resistance                                                                                -  6.1Ω

               Voice Coil Inductance                                                                                -  1.0mh

               Free Air Resonance                                                                                  -  29Hz

               Moving Mass                                                                                             -  20.9g

               Effective Piston Area                                                                                 -  230cm2

               Vas                                                                                                            -  97liters

               MS                                                                                                             -  2.04

               Qes                                                                                                           -  0.52

               Qts                                                                                                            -  0.41

Rohacell / Carbon Fiber Cone. Optimized stiffness / damping ratio. Vented cast aluminum. Low damping rubber surrounds improves transient response. Fiberglass voice coil former. Extended copper sleeve on pole piece for low inductance and distortion. CCAW Voice coil reduces moving mass, long life silver lead wires. Vented pole piece.                                                                                                                                                                                              SB17CRC35 -8                                SB17CRC35 - 4

Nominal impedance                                         8 Ω                                                     4 Ω      

DC Resistance                                                5.7 Ω                                                3.1 Ω

Voice Coil Inductance                                     0.15 mh                                            .13 mh

Effective Piston Area                                     118 cm²                                              118 cm²

Voice Coil Diameter                                       35.5 mm                                              35.5 mm

Air Gap Height                                                   5 mm                                                 5 mm 

Liner Coil Travel                                              11 mm                                                11 mm 

Voice coil Height                                              16 mm                                               16 mm 

Magnet weight                                                 0.54 kg                                             0.54 kg 

Net weight                                                       1.56 kg                                              .56 kg 

Free Air resonance                                            28 hz                                             31.5 hz 

Sensitivity                                                 ( 2.83 v / 1 m )  87 db                        ( 2.83 v / 1 m)  90 db 

Mechanical Q Factor                                      3.90 Qms                                          4.32 Qms 

Electrical Q Factor                                          0.37 Qes                                           0.35 Qes 

Total Q Factor                                                 0.34 Qts                                            0.32 Qts 

Moving Mass                                                  13.3 gms                                            14.2 gms 

Force Factor                                                    6.0 Tm                                              5.0 Tm

Vas                                                                   48 litres                                           35.5 itres

Rated power Handling                                     60 Watts                                            60 Watts

Vented cast aluminum chassis for optimum strength. Proprietary cone material with natural fibres, made in house. Soft low damping surround for good transient response. Fiberglass voice coil former. Extended copper sleeve on pole piece for low inductance and distortion. CCAW voice coil for reduced moving mass, long life silver lead wires. Vented pole piece.  

                                                      SB17NRXC35 - 8                                                SB17NRXC35 - 4 

Nominal impedance                                  8 Ω                                                                  4 Ω      

DC Resistance                                       5.7 Ω                                                               3.1 Ω

Voice Coil Inductance                          0.15 mh                                                            0.13 mh

Effective Piston Area                            118 cm²                                                            118 cm²

Voice Coil Diameter                             35.5 mm                                                            35.5 mm

Air Gap Height                                          5 mm                                                              5 mm 

Liner Coil Travel (p - p) 11mm               11 mm                                                             11 mm 

Voice coil Height                                     16 mm                                                            16 mm 

Magnet weight                                        0.54 kg                                                            0.54 kg 

Net weight                                               .56 kg                                                              1.56 kg 

Free Air resonance   Fs                           32 hz                                                                35 hz 

Sensitivity                                       ( 2.83 v / 1 m )89 db                                     ( 2.83 v / 1 m)  92 db 

Mechanical Q Factor                              5.0 Qms                                                          5.5 Qms 

Electrical Q Factor                                  0.36 Qes                                                        0.34 Qes 

Total Q Factor                                        0.34 Qts                                                         0.32 Qts 

Moving Mass                                           11 gms                                                          11.6 gms 

Force Factor                                             5.9 Tm                                                          4.8 Tm

Vas                                                           44.5 litres                                                       35.2 litres

Rated power Handling                             60 Watts                                                        60 Watts 

Vented cast aluminum chassis. Cone material Egyptian paper fibers, made in house. Soft low damping rubber surround for optimum transient response. Bimax Spider for improved linearity with a powerful neodymium motor. Extended copper sleeve on pole piece for reduced distortion and low inductance. CCAW voice coil for reduced moving mass, and long life silver lead wires, with vented pole piece.            

                Satori / SB                                    MW16P - 8                                            MW16P - 4 

Nominal impedence                                         8 Ω                                                          4 Ω      

DC Resistance                                              6.2 Ω                                                       3.4 Ω

Voice Coil Inductance                                   0.2 mh                                                      0.2 mh

Effective Piston Area                                   119 cm²                                                     119 cm²

Voice Coil Diameter                                      36 mm                                                      36 mm

Air Gap Height                                               5 mm                                                         5 mm 

Liner Coil Travel                                           12 mm                                                       12 mm 

Voice coil Height                                            17 mm                                                      17 mm 

Magnet weight  (neo)                                    0.13 kg                                                      0.13 kg 

Nett weight                                                    1.01 kg                                                      1.01 kg 

Free Air resonance                                         29 hz                                                         28 hz 

Senstivity                                                ( 2.83 v / 1 m ) 87.5 db                ( 2.83 v / 1 m) 90 db 

Mechanical Q Factor                                    4.5 Qms                                                  5.0 Qms 

Electrical Q Factor                                       0.35 Qes                                                  0.28 Qes 

Total Q Factor                                              0.33 Qts                                                   0.27 Qts 

Moving Mass                                                 12.4 gms                                                 12.8 gms 

Force Factor                                                  6.3 Tm                                                     5.2 Tm

Vas                                                                48 litres                                                     50 litres

Rated power Handling                                   60 Watts                                                   60 Watts

Vented aluminum Chassis. Cone material Egyptian paper fibers, made in house. Soft low damping rubber surround for optimum transient response. BIMAX Spider for improved linearity. Powerful Neodymium magnet, fiberglass voice coil former. Extended copper sleeve on pole piece for low inductance and reduced distortion. CCAW voice coil for reduced moving mass long life silver lead wires.  Vented pole piece.

Satori / SB                                                 MW19P - 8                                             MW19P - 4

Nominal impedance                                       8 Ω                                                          4 Ω      

DC Resistance                                              6 Ω                                                         3.4 Ω

Voice Coil Inductance                                 0.2 mh                                                      0.14 mh

Effective Piston Area                                 158 cm²                                                      158 cm²

Voice Coil Diameter                                    39 mm                                                         39 mm

Air Gap Height                                             6 mm                                                            6 mm 

Liner Coil Travel ( p -p )                            13.4 mm                                                     13.6 mm 

Voice coil Height                                        19.4 mm                                                    19.6 mm 

Magnet weight  (neo)                                0.15 kg                                                         0.15 kg 

Net weight                                                  1.48 kg                                                        1.48 kg 

Free Air resonance                                    32.5 hz                                                        32 hz 

Sensitivity                                                     89 db                                                        91.5 db 

Mechanical Q Factor                                 4.06 Qms                                                     4.11 Qms 

Electrical Q Factor                                      0.36 Qes                                                    0.30 Qes 

Total Q Factor                                             0.33 Qts                                                     0.28 Qts 

Moving Mass                                               17.9 gms                                                     18.4 gms 

Force Factor  BL                                         7.8 Tm                                                         6.5 Tm

Hard paper cone for improved piston operation. Large motor system with under cut pole piece and dual shorting rings. Vented cast aluminum chassis, 3" copper voice coil for improved power andling, long life silver lead wires. Low damping rubber surround, fiberglass voice coil former, optimized for vented enclosure, or use with passive radiators.

Satori / SB                                              WO24P - 8 (91/2")                                    WO24P - 4

Nominal impedance                                       8 Ω                                                          4 Ω      

DC Resistance                                            5.8 Ω                                                         0.3 Ω

Voice Coil Inductance                               0.56 mh                                                      0.29 mh

Effective Piston Area                                 255 cm²                                                      255 cm²

Voice Coil Diameter                                  49.5 mm                                                     49.5 mm

Air Gap Height                                                6 mm                                                        6 mm 

Liner Coil Travel ( P - P)                               17 mm                                                     17 mm 

Voice coil Height                                           23 mm                                                     23 mm 

Magnet weight                                             1.36 kg                                                   1.36 kg 

Net weight                                                      3.7 kg                                                    3.7 kg 

Free Air resonance                                      24.5 hz                                                     28 hz 

Sensitivity                                             ( 2.83 v / 1 m ) 88 db                          ( 2.83 v / 1 m) 91 db 

Mechanical Q Factor                                  5.7 Qms                                                   6.7 Qms 

Electrical Q Factor                                     0.41 Qes                                                 0.42 Qes 

Total Q Factor                                           0.38 Qts                                                    0.40 Qts 

Moving Mass                                              44.5 gms                                                    42 gms 

Force Factor BL                                           9.9 Tm                                                      7.6 Tm

Vas                                                              87.5 litres                                                  70 litres

Hard paper cone for improved piston operation. Large motor system with under cut pole piece and dual shorting rings. Vented cast aluminum chassis, 3" copper voice coil for improved power handling, long life silver lead wires. Low damping rubber surround, fiberglass voice coil former, optimized for vented enclosure, or use with passive radiators.

                                                                                   SB34NRXL - 8                                     

Nominal impedance                                                          8Ω                       

DC Resistance                                                                6.2 Ω   

Voice Coil Inductance                                                    1.2 mh                                         

Effective Piston Area                                                    508 cm²                         

Voice Coil Diameter                                                    75.6 mm                                                               

Air Gap Height                                                                8 mm                                          

Liner Coil Travel (p - p)                                                 20 mm                                                                    

Voice coil Height                                                            28 mm                                                                

Magnet weight                                                              3.6 kg                                            

Net weight                                                                    8.9 kg                                                                

Free Air Resonance                                                     22 hz                                             

Sensitivity                                                                    91 db

Mechanical Q Factor                                                   5.5 Qms                                        

Electrical Q Factor                                                    0.29 Qes                                                                

Total Q Factor                                                          0.28 Qts                                           

Moving Mass                                                                93 gms                                          

Force Factor  BL                                                        16.6 Tm                                           

Vas                                                                              205 litres                                                            

Excellent cost / performance ratio. Hard and rigid Kevlar/ paper cone rubber surround. Cast alloy basket and large magnet system. Solid aluminum phase plug gives extended frequency response control. Kapton two layer voice coil. Audiophile characteristics are in focus.

                                                                 Gradient AXT - 8                                                                      

Nominal impedance                                         8 Ω                                                                        

 DC Resistance                                             6.8 Ω                                                                     

Voice Coil Inductance                                    0.4 mh                                                                         

Voice Coil Diameter                                        39 mm                                                                         

Free Air Resonance                                       38 hz                                             

Sensitivity (1w / 1m)                                      91 db

Mechanical Q Factor                                  7.65 Qms                                        

Electrical Q Factor                                      0.32 Qes                                                                

Total Q Factor                                            0.30 Qts                                           

Moving Mass                                               20.8 gms                                         

Force Factor  BL                                          10.4 Tm                                           

Vas                                                               52.2 litres                                                           

X max ( + / - )                                              0.4 mm 

Excellent cost / performance ratio. Hard and rigid Kevlar/ paper cone rubber surround. Cast alloy basket and large magnet system. Solid aluminum phase plug gives extended frequency response and control. Kapton two layer voice coil. Audiophile characteristics are in focus.

                                                                               Gradient AXT 10"      

Nominal impedance                                                           8Ω                   

Voice Coil length                                                            19 mm                                     

Voice Coil Diameter                                                       39 mm    

Free Air Resonance                                                      35 hz                                  

Sensitivity (1w / 1m)                                                    91.2 db

Mechanical Q Factor                                                   4.84 Qms                                           

Electrical Q Factor                                                       0.42 Qes                                                         

Total Q Factor                                                               0.39Qts 

Force Factor  BL                                                          13.5 Tm                                     

Vas                                                                               64.2 litres                                                      

Excellent cost / performance ratio. Hard and rigid Kevlar/ paper cone rubber surround. Cast alloy basket and large magnet system. Solid aluminum phase plug gives extended frequency response and control. Kapton two layer voice coil. Audiophile characteristics are in focus.

                                                                              Gradient AXT 12"  

Nominal impedance                                                   8 Ω    

Sensitivity                                                                93 db  

Voice Coil Diameter                                               49.5 mm   

Weight                                                                   7.65 kg  

No other specifications available at present.