These are two different beasts looking at the TSP's.
Here is the RCF TSP
Specifications: Power handling: 500 watts RMS/1,000 watts continuous program VCdia: 3" Le: 1.5 mH Impedance: 8 ohms Re: 5.6 ohms Frequency response: 40-2,000 Hz Fs: 50 Hz SPL: 98 dB 1W/1m Vas: 3.53 cu. ft. Qms: 9.7 Qes: 0.41 Qts: 0.39 Xmax: 6.5 mm Dimensions: Overall diameter: 15.2", Cutout diameter: 13.9", Depth: 6.4".
Here is your JBL 2226 TSP
THIELE/SMALL PARAMETERS6:
fs: 40 Hz
Re: 5.0 ohms (H)
10.0 ohms (J)
Qts: 0.31
Qms: 5.0
Qes: 0.33
Vas: 175 l (6.2 ft3)
Sd: 0.088 m2 (137 in2)
Xmax: 7.6 mm (0.30 in)
Vd: 689 cm3 (41 in3)
Le: 1.75 mH (H)
3.5 mH (J)
o (Half space)2: 3.3%
Pe (Max)1: 600 W continuous pink noise
MOUNTING INFORMATION:
Overall Diameter: 388 mm (15น⁷⁄₆₄ in)
Bolt Circle Diameter: 370 mm (14⁹⁄₁₆ in)
Baffle Cutout Diameter
Front Mount: 355 mm (14 in)
Rear Mount: 359 mm (14⁹⁄₆₄ in)
Depth7: 137 mm (5ฝ in)
Volume Displaced by Driver: 6 l (0.2 ft3)
Net Weight: 8.7 kg (19ผ lb)
Shipping Weight: 10.2 kg (22ฝ lb)
Stu,
I thought that the TSP's were more critical when dealing with a ported front loaded cab as opposed to a horn loaded.
