DD Audio ZVL, Руководство пользователя

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1. Remove the ZVL’s backplate and set the internal output jumpers to the STRAP position
for the channels you will be connecting to the strapped amplifiers.
2. Set the internal input jumpers to the PRE position for the channels you will be
connecting to the strapped amplifiers. This routes the signal through the ZVL preamp
controls.
3. Reassemble the ZVL then proceed.
4. Connect the full range RCA outputs from the source unit to the ZVL inputs.
5. Connect the RCA’s from the ZVL OUTPUTS as shown in the strapping diagram below
to the amplifier INPUTS.
6. 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.
7. Set the GAIN control on the ZVL to half.
8. The ZVL LPF should be set to its highest frequency setting and the SUBSONIC should
be set to its lowest frequency setting.
9. 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 by adding the RMS wattage of your
amplifiers to get a combined/total RMS wattage. Next, use the following formula
to get your combined target voltage √P*R = E. Multiply (P) by the impedance of
the load that will be connected to the amplifiers (R), then find the square root of
that number to get the target output Voltage (E) (EXAMPLE: Strapping 2 x 2000
watt RMS amps at 2Ω. 4000W (P) with a 2Ω load (R) would equal 89.44 VAC (E)
- (√4000*2 = 89.44VAC). Once you have determined your target output voltage
for the pair of strapped amps divide it by 2 (89.44VAC / 2= 44.72VAC). This gives
you the individual target voltage for each amp.
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
#1. Connect the negative voltmeter lead to the (-) NEGATIVE TERMINAL on
amplifier #1.
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. Turn amplifier #1’s gain up until your voltmeter reads the individual target output
voltage. Now connect the voltmeter to the speaker terminals of amplifier #2 and
adjust the gain of amplifier #2 until you see the exact same voltmeter reading.
h. Connect a strapping wire between the (-) NEGATIVE TERMINALS of the two
amplifiers being strapped.
i. Connect the positive voltmeter lead to the (+) POSITIVE TERMINAL on amplifier
#1. Connect the negative voltmeter lead to the (+) POSITIVE TERMINAL on
amplifier #2. The voltmeter should now read the target voltage for the combined
amplifiers.
j. Turn your system off.
10. Connect the speaker (+) POSITIVE LEAD to the (+) POSITIVE TERMINAL of amplifier
#1. Connect the speaker (-) NEGATIVE LEAD to the (+) POSITIVE TERMINAL of
amplifier #2. Repeat the connection process for each pair of amplifiers you are
strapping with the ZVL.
11. Adjust the ZVL LOW PASS FILTER and SUBSONIC FILTER for desired listening.
NOTE : Two pairs of amplifiers can be strapped in this manner with one ZVL. If more
outputs are required for your application you will be able to use Channel 5/6 to feed
signal into a second ZVL unit allowing you to strap up to 4 pairs amplifiers in this
manner. Please refer to the Linking 2 ZVL Modules section of this manual.
STRAPPING SUBWOOFER AMPLIFIERS W/OUT A ZVL INPUT
(amplifiers must be matching models) [ continued ]
DD AUDIO / ZVL / 18
SET JUMPERS FIRST, see ZVL Internal Jumper Configuration on next page
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