DD Audio ZVL, Руководство пользователя

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1. The ZVL default setting is channel pairs 1-4 Pre/Link and channel pair 5 Pass/Link. This
configuration will simultaneously control 4 sub amps in LINK mode while passing full
range signal on channel pair 5.
2. If no reconfiguration is needed, proceed to step 5. If reconfiguration is needed, remove
the backplate to access the internal jumpers and proceed to step 3.
3. Set the internal output jumpers to the LINK position for the channels you will be
connecting to the linked amplifiers.
4. Set the internal input jumpers to the PRE position for the channels you will be
connecting to the linked amplifiers. This will route the signal through the ZVL preamp
controls. Reassemble the ZVL then proceed.
5. Connect the full range RCA outputs from the source unit to the ZVL inputs.
6. Connect the RCAs from the ZVL output, as shown in the linking diagram, to your DD
Audio Amp’s ZVL INPUT.
7. The amplifier settings need to be adjusted as follows: The GAIN should be adjusted to
the lowest setting. The LOW PASS FILTER should be turned towards the highest
frequency. (EXAMPLE: if LPF = 20Hz to 200Hz, adjust to 200Hz) - The SUBSONIC
FILTER should be turned towards the lowest frequency. (EXAMPLE: if SUBSONIC
range = 10Hz to 50Hz, adjust to 10Hz) - If applicable set preamp to MASTER or MAIN -
any other amplifier settings such as PHASE or BASS BOOST should be set to 0.
8. Set the GAIN control on the ZVL to half.
9. The ZVL LPF should be set to its highest frequency setting and the SUBSONIC should
be set to its lowest frequency setting.
10. Now you will need to match the outputs of your amplifiers. For this procedure you will
need a Digital Voltmeter and the ability to play a 0dB 40hz test tone from your source
unit.
a. Determine your target output voltage using the formula √P*R = E. Multiply the
RMS Power of your amplifier (P) by the impedance of the load that will be
connected to the amplifier (R), then find the square root of that number to get the
target output Voltage (E). (EXAMPLE: 2000W (P) with a 1Ω load (R) would equal
44.7 VAC (E) ) √2000*1 = 44.7VAC
b. Make sure no subwoofers are connected to the amplifiers.
c. Adjust your Voltmeter so that it is measuring Volts AC.
d. Connect the positive Voltmeter lead to the (+) POSITIVE TERMINAL on amplifier
then connect the negative Voltmeter lead to the (-) NEGATIVE TERMINAL on
amplifier.
e. Turn the audio system on and turn the source unit volume all the way down.
f. Now, while playing the 40Hz sine wave turn your source unit to its maximum
clean volume level. If you don’t have an oscilloscope or other tools to determine
this, you can just turn your source unit up to ¾ of its volume for this step.
g. While measuring the Voltage AC turn the amplifier’s gain up until you reach your
target output voltage.
h. Repeat steps d-g for all the linked amplifiers until all are set to the target output
voltage.
i. Turn your system off.
11. Connect the speaker (+) POSITIVE LEAD to the (+) POSITIVE TERMINAL of the
amplifier. Connect the speaker (-) NEGATIVE LEAD to the (-) NEGATIVE TERMINAL of
the amplifier.
12. Repeat the connection process for each amplifier you are Linking with the ZVL.
13. Adjust the ZVL LOW PASS FILTER and SUBSONIC FILTER for desired listening.
NOTE : Up to 5 amplifiers can be linked in this manner with one ZVL. If more outputs are
required for your application you will be able to connect 4 amplifiers while using Channel
5/6 to feed signal into a second ZVL unit allowing you to link up to 9 amplifiers in this
manner. Please refer to the Linking 2 ZVL’s section of this manual.
LINKING SUBWOOFER AMPLIFIERS W/OUT A ZVL INPUT
(amplifiers must be matching models) [ continued ]
DD AUDIO / ZVL / 12