:no: Well I cannot seem to get WinISD to save the parameters of the JBL GT5-15 driver, even though I have loaded the stated TS parameters I get a "Parameter Error list" for Qts, Qms, Qes and the help button does not work.

This is the GT5-15 Parameters,

DIAMETER: 15" (381MM)

SENSITIVITY (2.83V @ 1M): 92dB

POWER HANDLING: 300WRMS 1200WPEAK

FREQUENCY RESPONSE: 25Hz – 400Hz

NOMINAL IMPEDANCE: 4 OHMS

VOICE-COIL DIAMETER: 2" (51MM)

DIMENSIONS:

THIELE-SMALL PARAMETERS

VOICE-COIL DC RESISTANCE: REVC (OHMS) . . . . . . 3.63

VOICE-COIL INDUCTANCE @ 1KHZ: LEVC (MH) . . . . . . . 2.42

DRIVER RADIATING AREA: SD (IN2) . . . . . . . . 132.5

SD (M2) . . . . . . . 855.00

MOTOR FORCE FACTOR: BL (TM) . . . . . . . . 16.53

COMPLIANCE VOLUME: VAS (FT3). . . . . . . . . 3.76

VAS (LITERS) . . . . . 106.5

SUSPENSION COMPLIANCE: CMS (μM/N) . . . . 102.00

MOVING MASS, AIR LOAD: MMS (GRAMS). . . . 332.00

MOVING MASS, DIAPHRAGM: MMD (GRAMS) . . . 317.00

FREE-AIR RESONANCE: FS (HZ) . . . . . . . . 27.30

MECHANICAL Q: QMS . . . . . . . . . . . 5.70

ELECTRICAL Q: QES . . . . . . . . . . . 0.76

TOTAL Q: QTS . . . . . . . . . . . . 0.67

MAGNETIC-GAP HEIGHT: HAG (IN) . . . . . . . . . 0.31

HAG (MM) . . . . . . . . 8.00

VOICE-COIL HEIGHT: HVC (IN) . . . . . . . . . 1.45

HVC (MM). . . . . . . . . . 37

MAXIMUM EXCURSION: XMAX (IN) . . . . . . . . 0.57

XMAX (MM) . . . . . . 14.50

For £70 the JBL GT)1514 driver is available, and it seems to have a better spec, but I cannot load these either without the same error?

DIAMETER: 15" (381MM)

SENSITIVITY (2.83V @ 1M): 93dB

POWER HANDLING: 350WRMS (1400WPEAK)

FREQUENCY RESPONSE: 23HZ ~ 400HZ

NOMINAL IMPEDANCE: 4 OHMS

VOICE COIL DIAMETER: 2.0" (51.0MM)

DIMENSIONS: mounting depth 6-13/16" (172mm) cutout diameter 13-15/16" (354mm) outer diameter 15-5/16" (389mm)

THIELE-SMALL PARAMETERS

VOICE COIL DC RESISTANCE: REVC (OHMS) . . . . . . 3.80

VOICE COIL

[email protected] 1KHZ: LEVC (MH) . . . . . . . 3.05

DRIVER RADIATING AREA: SD (IN2) . . . . . . . . 128.7

SD (M2) . . . . . . . 830.00

MOTOR FORCE FACTOR: BL (TM) . . . . . . . . 17.13

COMPLIANCE VOLUME: VAS (FT3). . . . . . . . . 5.42

VAS (LITERS). . . . . 153.50

SUSPENSION COMPLIANCE: CMS (μM/N) . . . . 156.00

MOVING MASS, AIR LOAD: MMS

MD

(GRAMS) . . . 257.00

MOVING MASS, DIAPHRAGM: M (GRAMS) . . . 243.00

FREE-AIR RESONANCE: FS (HZ) . . . . . . . . 25.10

MECHANICAL Q: QMS . . . . . . . . . . . 7.08

ELECTRICAL Q: QES . . . . . . . . . . . 0.52

TOTAL Q: QTS . . . . . . . . . . . 0.49

MAGNETIC-GAP HEIGHT: HAG (IN) . . . . . . . . . 0.31

HAG (MM) . . . . . . . . 8.00

VOICE COIL HEIGHT: HVC (IN) . . . . . . . . . 1.45

HVC (MM). . . . . . . . . . 37

MAXIMUM EXCURSION: XMAX (IN). . . . . . . . .0.57

XMAX (MM) . . . . . . 14.50

I am still looking around to see what drivers are available, UK seems pretty poor for choice. Still can't decide on a couple of cheaper car 15" drivers such as the above, or a pro 18" driver?