DLS A, RA, CA, CAD Series Amplifier User Manual

On DLS mono amplifiers, with doubled speaker connectors,
both the + and - terminals are internally connected in parrallel.
CONNECTION OF SUBWOOFERS
TO DLS MONO AMPS
Amplifier speaker terminal
+
+
-
+
Amplifier speaker terminal
+
+
-
+
Amplifier speaker terminal
L+
LR+ R-
+
4Ω
4Ω
Connection of a subwoofer
with 4 ohm single voice coil
Impedance = 4 ohm
Amplifier speaker terminal
+
+
Connection of a subwoofer
with 4 ohm dual voice coils
Impedance = 2 ohm
Amplifier speaker terminal
+
+
Single voice coil subwoofer
connected in bridge mode.
Impedance = 4 ohm
Amplifier load = 2 ohm
Amplifier speaker terminal
L+
LR+ R-
+
+
+
4Ω
4Ω
+
-
Dual voice coil subwoofer
connected in parallel in bridge
mode.
Impedance = 2 ohm
Amplifier load = 1 ohm
Amplifier speaker terminal
L+
LR+ R-
-
4Ω
4Ω
-
+
-
-
+
-
Amplifier speaker terminal
L+
LR+ R-
4Ω
4Ω
-
CONNECTION OF SUBWOOFERS IN
BRIDGE MODE TO DLS STEREO AMPS
4Ω
+
4Ω
4Ω
+
-
4Ω
-
+
-
+
+
4Ω
4Ω
4Ω
+
Amplifier speaker terminal
+
+
-
+
-
Connection of two subwoofers
with 4 ohm dual voice coils
Impedance = 1 ohm
Amplifier speaker terminal
+
+
Single voice coil subwoofer
connected in bridge mode.
Impedance = 2 ohm
Amplifier load = 1 ohm (only for
DLS A-series amplifiers)
Amplifier speaker terminal
L+
LR+ R-
+
4Ω
-
4Ω
4Ω
Connection of two subwoofers
with 4 ohm single voice coil
Impedance = 2 ohm
-
+
-
+
4Ω
+
-
4Ω
-
+
Connection of two subwoofers
with 4 ohm dual voice coils in
parallel and then in series to the
amplifier gives a resulting
impedance of 4 ohm.
Amplifier load = 2 ohm
Amplifier speaker terminal
L+
LR+ R-
4Ω
-
+
4Ω
4Ω
+
-
+
-
+
4Ω
-
+
+
4Ω
-
-
+
4Ω
4Ω
+
-
+
Connection of two subwoofers
with 4 ohm dual voice coils in
parallel and then in series to the
amplifier with a resulting
impedance of 4 ohms.
If you connect two subwoofers with
2 ohm voice coils in this way the
resulting impedance is 2 ohms.
Connection of four subwoofers
with 4 ohm single voice coil
Impedance = 1 ohm
4Ω
4Ω
4Ω
Connection of two subwoofers
with 4 ohm voice coils in series
Impedance = 8 ohm
Amplifier load= 4 ohm
Connection of a 4 ohm dual
voice coil subwoofer with the
voice coils in series.
Impedance = 8 ohm
Amplifier load= 4 ohm
SPEAKER LOADS
Most car audio speakers have an impedance of 4 ohm, but
2 ohm speakers and subwoofers are becoming more common. Many new subwoofers also have dual 2 ohm voice
coils.
Here are many examples of how to connect subwoofers.
CONNECTION IN STEREO MODE TO STEREO
AMPLIFIERS:
- DLS Performance (former CLASSIC) and Reference
amplifiers can handle loads down to 2 ohm on each stereo
channel.
- DLS ULTIMATE amplifiers can handle loads down to 1
ohm on each stereo channel.
CONNECTION IN BRIDGE MODE TO A STEREO AMPLIFIER:
CONNECTION OF SUBWOOFERS TO MONO
AMPLIFIERS:
DLS mono amplifiers are available in all of DLS three
amplifier lines. These amplifiers are internally designed for
use with subwoofers at low impedances.
MONO AMPLIFIERS CAN NOT BE CONNECTED IN
BRIDGE MODE!
All of the mono amplifiers have double speaker terminals
that are internally connected (+ with + and - with -). The
double output terminals can not be connected in bridge
mode, it is just for making it easier to connect more than
one subwoofer to the amplifier.
- DLS Performance (former CLASSIC) mono amplifiers
CA12, CAD11 and CAD15 can handle loads down to 1 ohm
(like four, 4 ohm subwoofers, connected in parallel.)
When you connect in bridge mode there is one most
important thing to know:
- DLS Reference RA10 mono amplifier can handle loads
down to 1 ohm.
- The impedance is halving when
connected in bridge mode to a stereo
amplifier.
- DLS ULTIMATE A6 mono amplifier can handle loads down
to 1 ohm.
MULTI CHANNEL AMPLIFIERS:
The speaker’s impedance is of course the same, a 4 ohm
speaker is always 4 ohm. It is the amplifier that perceives
the 4 ohm speaker as a 2 ohm load, and a 2 ohm speaker is
perceived as a 1 ohm load.
DLS Performance (CLASSIC) and Reference stereo
amplifiers can handle loads down to 4 ohm when connected
in bridge mode. The amplifier percieves this as a 2 ohm
load and we say that these kinds of amplifiers are 2 ohm
stable.
DLS ULTIMATE stereo amplifiers can handle loads down
to 2 ohm when connected in bridge mode. The amplifier
perceives this as a 1 ohm load and we say that these kinds
of amplifiers are 1 ohm stable.
If you are using more than one speaker / subwoofer they
must be connected in a way so the impedance is still 4 ohm
when connected to a Performance (CLASSIC) or
Reference amplifier in bridge mode.
On the ULTIMATE amplifiers you can connect speakers in
bridge mode with an impedance of only 2 ohms.
+
+
- DLS Reference RA30 and RA50 are multi channel
amplifiers that can handle loads down to 2 ohm on the mono
sub channel.
- DLS ULTIMATE A5 and A7 are multi channel amplifiers
that can handle loads down to 1 ohm on the mono sub
channel.
NOTE! Choose a location for your amplifier where air can
circulate freely around it. Do not cover the amplifier with
carpets or hide behind trim panels.
Do not mount the amplifier in an inverted or upside down
position. Mono amplifiers will generate a lot of heat!
+
+
+
-
-
4 ohm
2 ohm
-
- DLS Performance (former CLASSIC) CA31, CAT31 and
CA51 are multi channel amplifiers that can handle loads
down to 2 ohm on the mono sub channel.
Two 2 ohm speakers in series.
Two 4 ohm speakers in parallel
+
Our multi channel amplifiers have two or four stereo
channels and one mono sub channel.
The mono sub channel on these amplifiers can not be
connected in bridge mode. They are designed to be mono
channels only and are connected in the same way as the
mono channel amplifiers above.
-
-
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