PROFESSIONAL SERIES FEATURES: clean or overdrive sound with JBL quality, reliability and power handling. 200 watts continuous pink noise power capacity The G Series speakers feature a perfect balance of strength and delicacy while maintaining the well-loved traditional JBL vir- 76 mm (3 in) aluminum ribbon voice coils tues of high power handling and bullet-proof reliability. They High sensitivity: G 125-8, 102 dB, 1 W, 1 m have large 3” diameter voice coils formed of edgewound alu- minum ribbon wire with special high-temperature adhesives to Gl35-8, 104 dB, 1 W, 1 m transfer all the power from your amp with maximum efficiency. A Wide, extended frequency response deep frame and cone with a paper dome provide the G Series’ Overdrive sound character special response and sound character. JBL’s unique SFG (Symmetrical Field Geometry) magnet structure eliminates unwanted types of distortion and lets the true sound of your instrument through. The rugged cast aluminum frame of the G Series loudspeakers provides heatsink action far better than in- ]BL knows that your loudspeaker is part of your instrument. expensive stamped-frame speakers and the G Series’ 200-watt The new JBL G Series loudspeakers are the latest expression of power capacity lets you crank it up set after set without worry. our commitment to provide you with the tools you need to hand- The rugged and versatile design of the G Series loudspeakers craft your sound and expand your musical palette. Three years make them ideal for utility use in sound reinforcement applica- of product development, during which a select group of JBL tions as well. engineers, product specialists and our Artist Advisory Board evaluated every major guitar loudspeaker and amplifier type, resulted in the best and most versatile musical instrument loud- -_- speakers available. The G Series speakers combine unparalleled tone, power and sensitivity at overdriven amp settings together with lyric sweetness for clean settings. Your amp can now have both a The G 125-8 and the G 135-8 musical instrument loudspeakers SPECIFICATIONS: - have standard mounting dimensions and will directly replace G I 25-a conventional I 2” and IS’ loudspeakers in any type of existing Gf35-a enclosure without hassle or special adaptors. Nominal Diameter: 380 mm - 1 x ” 300mm_ 1 S ” The G 135-8 makes an outstanding lead, pedal steel, key Nominal Impedance: a ohms a ohms board, or bass guitar loudspeaker and will make just about any Power Capacity existing amp enclosure sound better. In vented enclosures, the AES shaped noise: 200 W 200 w G 135-8 gives the drive and punch bass players favor. For use with Sensitivity rhythm guitar, keyboards or vocals, the G 125-8 can be used in a 500 Hz-2.5 kHz: 102 dB SPL 104 dB SPL tuned enclosure to add solid low-end punch to the sound. Frequency Range: 60-7000 Hz 50-6000 Hz Voice Coil Diameter: 76 mm 13 in) 76 mm I3 in) Voice Coil Material: aluminum ribbon aluminum ribbon ENCLOSURES Magnetic Assembly Weight: 4.8 kg (IO.5 Ibs) 4.8 kg (IO.5 lbsl Flux Density 1.0 tesla The G 125-8 lead guitar loudspeaker is designed to directly 1.0 tesla replace any 12” speaker, such as those in open-back amps, and Frame Material: diecast aluminum diecast aluminum will give outstanding performance for lead guitar. Instruments Baffle Cutout Diameter such as rhythm guitar and keyboards and vocal reinforcement front or rear mounf: 281 mm (1 f-H/la in) 351 mm(13-‘3/~6in) applications, however, require more bass than lead guitar; for Depth: 137mm 15.3g inl 162 mm 16-3A in) these applications, a tuned enclosure of from I to 2 cubic feet Net Weight: 5.5 kg I I2 Ibs) 5.9kgll3Ibsl will provide uniform frequency response down to the lower Thiele-Small Parameters: pitches of the vocal range. The enclosure size that produces the fs (Hz) 65 45 most uniform response is 1.5 cubic feet, with a port of 12.6 square inches (4” diameter hole), tuning the enclosure to 80 Hz. Re (ohms): 5.2 5.2 , Tuning information for other enclosure sizes is given in the I&: 0.32 0.36 enclosure tuning table. The G 135-8 will provide deepest and most uniform bass 0,s: 5.5 5.5 response in enclosures between 3 and 8 cubic feet. A 6 cubic foot Q,,: 0.34 0.38 enclosure, using a ducted port of 19.6 square inches (5” diam- eter) and 2” length to tune to 40 Hz, will provide the best overall Vas: 71 If2.5 ft’l 235 I la.3 ft’l performance in the lowest octave. Tuning information for other SD: 0.053 m* 182 in21 0.089 m2 1I38 in21 enclosure sizes is given in the enclosure tuning table. X ,,,ax: 2.5 mm 10.1 in) 2.5 mm (0.1 in1 J” VD: 133 cm’ ia in3) 233 cm’ (13.6 in? ENCLOSURE TUNING TABLE: L, ImHI: 0.5 0.5 ENCLOSUREVOLUME ‘UNINC FREOUENCY FORTAREA I)RT DIAh4ETER IDUCT LENGTH q. (half-space reference efficiency): 5.5% 5.5% liters cubicfeet G125.8 c 135-a mm in. mm in. 28 1.0 80 - ;; 10.17.7 l 76 3.0 35 I.25 80 - 91 3.6 IBL continually engages in research related to product improvement. New materials, production 80 - 88 13.6 107 4.2 methods, and design refinements are introduced into existing products without notice as a :: s1.51.75 80 110 17.7 119 4.7 routine expression of that philosophy. For this reason. any current IBL product may differ in some 57 2.0 80 140 22 2 I35 5.3 respect from its published description, but will always equal or exceed the original design 71 2.5 80 - 210 32.7 165 6.5 specifications unless otherwise stated. 85 3.0 12.6 102 4.0 102 40 85 *3.0 80 40- 2;: 45.2 193 7.6 II3 4.0 40 81 12.6 102 4.0 ;8 2-3 120 4.25 40 81 12.6 102 4.0 51 20 127 4.5 40 81 12.6 102 4.0 I7 I35 4.75 40 81 126 102 4.0 ;: 142 5.0 40 126 I96 127 5.0 74 :; 149 5.25 40 126 19.6 127 5.0 66 26 156 5.5 40 126 196 127 5.0 58 23 163 5.75 40 126 196 127 5.0 51 20 170 ‘6.0 80 40 126 196 127 5.0 46 I8 170 ‘6.0 583 w4 272 10.7 177 6.25 40 126 196 127 5.0 l-6 184 6.5 40 126 196 127 5.0 ;: I4 191 6.75 40 126 I96 127 5.0 31 I2 198 7.0 40 126 19.6 127 5.0 25 IO 205 7.25 40 126 19.6 127 5.0 23 09 212 7.5 40 126 19.6 127 5.0 219 7.75 40 I35 21.0 I32 5.2 _ _ 227 8.0 40 143 22.2 135 5.3 _ _ ’ The asterisks denote enclosure snes that are optmmm for full frequency range apphcatmns Tunmg I 5 and 3 cubnc foot enclosures to a0 Hz gwes the best low frequency response for one or two Gl25-8s respectwely, and four Gl25-a’s wll pmvlde extremely high SPL (sound pressure levell capabihty when used m a column enclosure of 6 cubic feet The second 6 cubic foot, 40 HZ tuning shown. IS optunum for the Cl 35-a Typical double-speaker enclosures with I5”cutouts WIII benefit from mstallatmn of a pair of GI 35-a’s, but, as with any loudspeaker model, avoId usmg two dlfferent models wthm the same enclosure JSL Professional, 8500 Balboa Boulevard, P 0. Box 2200, Northridge, California 91329 US A PB16 15M 10168 Printed in U..S.A .