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■For the DG100-212A

The amplifier’s internal speaker (4 Ω) is connected to the speaker jack.
If it is necessary, you can disconnect the internal speaker and connect
an external speaker to the speaker jack.
When an external speaker is used, make sure the speaker(s) meets the
following requirements.
• A power rating of at least 100 W, impedance of 4 – 8 Ω.

■For the DG80-210A/DG80-112A

The amp’s internal speaker (8 Ω) is connected to the SPEAKER 1 jack.
The SPEAKER 2 (EXT) jack can be used to add an external speaker(s).
Also, if necessary, you can disconnect the internal speaker to connect 2
external speakers directly to the amp. The two speaker jacks are con-
nected in parallel. When external speakers are used, make sure the
speakers meet the following requirements.
● When one speaker jack is used.
•A power rating of at least 100 W, impedance of 4 – 16 Ω.
•The total impedance for the speakers in a circuit must not be less
than 4 Ω.
● When both speaker jacks are used.
•Speakers connected to each jack must have a power rating of at
least 100 W, and impedance of 8 – 16 Ω.
•The total impedance for the speakers in a circuit must not be less
than 4 Ω.

■For the DG130HA

The amp is equipped with two speaker jacks. The two speaker jacks are
connected in parallel. Make sure the speakers meet the following re-
quirements.
● When one speaker jack is used.
•Power rating of at least 130 W, impedance of 4 – 16 Ω.
•The total impedance for the speakers in a circuit must not be less
than 4 Ω.
● When both speaker jacks are used.
•Speakers connected to each jack must have a power rating of at
least 100 W, and impedance of 8 – 16 Ω.
•The total impedance for the speakers in a circuit must not be less
than 4 Ω.
Connecting Speakers
Before connecting speakers to the speaker jack(s) check the power rating and impedance of the speaker and make sure
they meet or are within the requirements recommended for the equipment.

Total Impedance

If two or more speakers are to be connected, you must take into
consideration the total impedance of the speakers.
Speakers normally have an impedance of 4, 8 or 16 Ω. When two
or more speakers are used together, the total impedance will
change according to the manner in which the speakers are con-
nected.
● Connecting in a series
The total impedance equals the impedance of the 1st speaker +
2nd speaker + 3rd speaker + …
When three speakers are connected in a series, as shown be-
low, the total impedance will be 24 Ω.
● Connecting in a parallel series
The total impedance =
When three speakers are connected in a parallel series, as shown
below, the total impedance will be about 2.7 Ω.
For the DG80-210A/DG80-112A
The two speaker jacks are connected in a parallel circuit inter-
nally therefore, adding a 4 Ω external speaker to the 8 Ω internal
speaker results in a total impedance of 2 Ω. In order to maintain
a minimum impedance of 4 Ω, an 8 Ω speaker or greater must be
used as an external speaker.
External Speaker
Greater that 8 Ω
Internal Speaker 8 Ω
DG100-212A/DG80-210A/DG80-112A/DG130HA