27.SPEAKER OUTPUT jacks: Using a 1/4” mono phone plug, connect the out- put of the BT-350 to your speaker cabi- net(s) via these jacks. Be sure to use heavy gauge speaker cable – not instru- ment patch cords – for these connec- tions. These jacks are wired in parallel: when connecting your speakers, keep the total impedance at or above 4 ohms. The chart below can help you determine the total impedance load when connect- ing various combinations of speakers in parallel.
SPEAKER | NUMBER OF | TOTAL |
IMPEDANCE | SPEAKERS | IMPEDANCE |
4 OHMS | 1 | 4 OHMS |
8 OHMS | 1 | 8 OHMS |
8 OHMS | 2 | 4 OHMS |
16 OHMS | 2 | 8 OHMS |
16 OHMS | 4 | 4 OHMS |
28.AC Line cord: Firmly plug the sup- plied, heavy-duty grounded power cord into this receptacle. When in use, be sure this cord is properly plugged into a safe- ly-wired, grounded 120 volt, 60Hz AC power outlet. Do not attempt to defeat the ground connection on this cable!
If your BT-350 was purchased outside of the United States, see the unit’s rear panel for its power rating and follow the above guidelines.
BIAMP OUTPUTS:
29.HIGH OUT: When used in the biamp mode, this output connects to the
high-frequency power amplifier. See the section entitled “Using the Biamp Capabilities” on pages 8 and 9 for details.
30.LOW OUT: When used in the biamp mode, this output connects to the low- frequency power amplifier. See the sec- tion entitled “Using the Biamp Capabilities” on pages 8 and 9 for details.
NOTE: You may access the BT-350’s internal power amp through the Effect Return jack (#34), for either the high or low signal. This is covered in the section entitled “Using the Biamp Capabilities” on pages 8 and 9.
LINE OUTPUTS:
31.UNBALANCED: This 1/4” mono phone jack supplies an unbalanced out- put signal for connecting to an external power amplifier. Very short runs (under 20’) to a mixer or recorder having unbal- anced inputs can also be made from this jack; for longer runs use the Balanced output (#32). The output level at this jack is adjusted by the Line Out Level control (#15) on the front panel.
32.BALANCED: This XLR-type con- nector supplies a balanced signal for con- necting to an external mixer, recorder or power amp which has balanced inputs. The output is adjusted by the Line Out Level control (#15). Use the Balanced output when the distance between the BT-350 and the mixing console or recorder is over 20’.
NOTE: The Balanced Output jack is wired as follows:
PIN 1: GROUND
PIN 2: POSITIVE (+)
PIN 3: NEGATIVE (–)
EFFECTS LOOP:
33.SEND: When using an external sig- nal processor with the BT-350, connect a shielded cable between the Send jack of the amplifier and the input of the effects unit. This “sends” the pre-ampli- fied bass signal to the device for process- ing.
34.RETURN: When using an external signal processor, connect a shielded cable between the output of the effects unit and the Return jack of the amplifier. This “returns” the processed bass signal to the BT-350’s internal amplifier.
