User manual JBL MONITOR

[. . . ] 12 Inch 3-Way Studio Monitor Model 4318 Owner's Manual The 4318 is a new member of the JBL family of bookshelf studio monitors. This line dates back to 1968 with the original 4310. JBL Incorporated Studio Monitor Model 4318 1: Introduction Thank you for purchasing the JBL 3-Way Studio Monitor 4318. [. . . ] Connecting the speakers while the power is on may damage the amplifier or the speakers. The positive terminals of the speaker have a red ring, and the negative terminals have a black ring. Be sure to connect without mistaking the polarity. The speakers are designed so that when a positive signal is applied to the positive terminal, the woofer moves in the forward direction (positive phase operation). In order to safely and securely connect to the terminals, we recommend that you use the Y terminals or banana plugs on the cable ends. 5. Attenuator Adjustment Independent, continuous variable attenuators are used for each unit to adjust the MF (mid-frequencies) and HF (highfrequencies) levels to the speaker's woofer level. Make adjustments appropriate to the reverb in the actual room, and to your liking. In general, for most speakers, it takes about 1 ­ 2 months after initial use until the unit's vibration system yields optimum performance. As the level balance is expected to initially change with use, we recommend that you readjust the level accordingly. 6: Attaching the Grills The speakers are shipped with the grill installed. The purpose of the grill is to protect the units. [. . . ] Also, the speakers' lifespan may be shortened by the effects of temperature, humidity or ultra-violet radiation. Please avoid exposing the speaker to strong lighting such as from lighting equipment or direct sunlight and avoid placing the speakers in high temperatures such as near the air conditioner exhaust pipe or a heat radiator. 8: Specifications Type Units used 3-way Bookshelf 30 cm pure pulp cone woofer 2213Nd 100 mm MF 105H 25 mm pure titanium dome 054Ti-1 8 200 W (RMS) 92 dB (2. 83 V/1m) 50 Hz ­ 40 KHz (-6 dB) 850 Hz, 4700 Hz 597 x 362 x 299 mm, (23-1/2" X 14-1/4" X 11-3/8", with grill 11-7/8") 17. 3 kg, (43 lbs) Impedance Allowable input Output sound pressure level Frequency response Crossover frequencies Dimensions (W x H x D) Weight JBL Incorporated, Northridge, CA USA P/N: 355128-001 [. . . ]