Instrukcja obsługi Russound TBL-75
Russound
system hi-fi
TBL-75
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TBL-75
Table-Top Volume Control
Instruction Manual
INTRODUCTION
The TBL-75 Volume Control is a free-standing stereo speaker-level volume control with
a front panel headphone jack and built-in impedance-matching options. It connects
between the speaker outputs of an amplifier or receiver and a pair of speakers. The
TBL-75 adjusts the volume of the speakers connected to it by adjusting the signal from
the amplifier to the speakers.
The TBL-75 is ideal for private listening as its tabletop design is suitable for placement
on a desk or bedside stand. When headphones are connected through the headphone
jack, it interrupts the speaker output, and the volume knob then controls the headphone
audio levels.
When using the TBL-75 in installations with more than one pair of speakers or with
additional volume controls, the TBL-75 has a rear panel impedance selector switch to
be set at 1X, 2X, 4X and 8X. The 1X setting allows the volume control to be used as a
standard control. The 2X, 4X, and 8X settings allow it to be used as an UltraMatch™
impedance matching volume control. The UltraMatch™ volume control matches the
minimum output impedance of the amplifier or receiver, in addition to adjusting volume.
It eliminates the need for a speaker selector or additional impedance matching equip-
ment.
PROPER SELECTOR SWITCH SETTING FOR IMPEDANCE MATCHING
By determining the drive capability of the amplifier with a few simple calculations, you
can determine the number of speakers the system can safely operate.
The selector switch must be set in a position that correctly multiplies the impedance of
the system to a level that is equal to or greater than the impedance of the amplifier.
The switch setting can be determined using the following simple steps:
1. Determine the amplifier's minimum impedance. The amplifier's minimum impedance
is usually found following Wattage and Frequency Response in the amplifier's speci-
fication page of the manual. It may also be listed on the back panel of the amplifier
near the speaker terminals. The impedance value is expressed in ohms.
2. Identify the correct impedance-matching chart according to the amplifier's minimum
impedance. There are two impedance matching charts, one for 8 ohm amplifiers
and one for 4 ohm amplifiers. Choose the chart that describes your amplifier. If your
amplifier is 6 ohm stable, use the 8 ohm chart.
3. Determine the impedance for each pair of speakers by referring to its manual.
4. Determine the total number of 4 ohm pairs of speakers. (rows on charts) If using 6
ohm speakers, treat them as 4 ohm speakers
5. Determine the total number of 8 ohm pairs of speakers. (columns on charts)
2
6. Follow the appropriate row and column to determine selector switch settings.
7. Set the selector switch to the correct X setting as determined.
CONSIDERATIONS
1. Make sure that your amplifier has adequate wattage for the number of speakers.
Watts per channel divided by the number of pairs should equal or exceed the indi-
vidual speaker’s minimum wattage requirements.
2. It is recommended to use an UltraMatch™ volume control for each room.
3. Every jumper setting must be set on the same setting throughout the system.
4. A minimum speaker load of 4 ohms can be connected to the output of each
UltraMatch™ volume control.
3
012345678910111213141516
0 - 1X 1X 2X 2X 4X 4X 4X 4X 8X 8X 8X 8X 8X 8X 8X 8X
1 1X2X2X4X4X4X4X8X8X8X8X8X8X8X8X
2 2X4X4X4X4X8X8X8X8X8X8X8X8X
3 4X4X4X8X8X8X8X8X8X8X8X
4 4X8X8X8X8X8X8X8X8X
5 8X8X8X8X8X8X8X
6 8X8X8X8X8X
7 8X8X8X
8 8X
Impedance Matching For 4 Ohm Amplifiers
4 Ohm Pairs
8 Ohm Pairs
Impedance Matching Charts For UltraMatch™
012345678
0 - 1X 2X 4X 4X 8X 8X 8X 8X
1 2X4X4X8X 8X 8X 8X
2 4X8X8X8X8X
3 8X8X8X
48X
Impedance Matching For 8 Ohm Amplifiers
8 Ohm Pairs
4 Ohm Pairs
Example: The table to the right
shows an 8 ohm minimum imped-
ance amplifier with 1 pair of 4 ohm
speakers and 3 pair of 8 ohm
speakers. The chart indicates the
jumper setting should be set at 8X.
Specyfikacje produktu
| Marka: | Russound |
| Kategoria: | system hi-fi |
| Model: | TBL-75 |
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