Velodyne DIGITAL DRIVE - REV H, Руководство пользователя

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w w w . v e l o d y n e . c o m
Digital Drive User’s Manual
NOTE: When a DD subwoofer detects an incoming RS - 232 command, it reverts to “Slave
Mode.” This means that the subwoofer will no longer accept IR commands. To reestablish
normal operations, remove the RS-232 cable and power cycle the unit.
Note that the daisy chain connection ONLY allows the woofers to communicate basic “run - time”
commands such as volume and preset. We recommend the following sequence when setting
up daisy
- chained subs.
1. First, connect only the master sub to the system. Do not connect the thru or serial
cables at this time.
2. Establish the crossover, phase, and other settings EXCEPT the EQ on the master sub
(see setup steps 1 – 17 starting on page 17). Note the low pass crossover, phase
and polarity settings, then save.
3. Connect the video out of the slave subwoofer, go to the settings screen, establish the
low pass crossover, slope, phase, polarity, and night mode settings from the master
subwoofer, then save settings. Repeat for each slave subwoofer in your system.
4. Connect the microphone to the slave subwoofer and use the “self - EQ” feature
(described on page 12) to establish room EQ for that subwoofer.
5. Repeat steps 3 and 4 for each slave subwoofer in your system.
6. Reconnect the video out to the master subwoofer, and reconnect the thru and serial
cables so that the master and slave subwoofer(s) are daisy chained.
7. EQ the primary subwoofer (see steps 8
- 25 starting on page 20). Self - EQ is NOT
recommended for the primary subwoofer.
8. Setup is complete!
A W o r d A b o u t S e t t i n g U p Yo u r R e c e i v e r / P r o c e s s o r F o r O p t i m a l
S u b w o o f e r P e r f o r m a n c e
It is important that your receiver/processor (from now on we’ll refer to this as your “receiver” for
simplicity) be set up correctly to work in concert with your DD subwoofer. In the receiver’s “speaker
set up” menu you will enter the number of speakers and indicate whether or not you have a
subwoofer. In addition you will enter the speaker size, usually “large” or “small.” It is almost always
advantageous to use the “small” setting. Most full-range speakers use smaller woofers for the
bass section and typically do much better in the upper bass and lower midrange if relieved of deep
bass duties. Your DD subwoofer, with its 1250 Watt RMS amplifier, large magnet and voice coil,
and servo control, can play 80Hz and below more accurately, with more power and with lower
distortion than a full range loudspeaker can. This is often referred to as “bi-amping” a system.
Setting your speakers to “small” in your receiver also means the receiver’s bass management will
send bass to the subwoofer in all playback modes, 2-channel or surround.
When you choose “small” you activate the receiver’s crossover. Some receivers will offer crossover
choices. In this case a good rule of thumb is double the low number of the stated frequency
response of your main speakers. So if a speaker’s response is rated from 40Hz –18KHz, then
doubling the 40Hz low frequency number equals 80Hz. In this example 80Hz would be a good
crossover point. When in doubt, 80Hz is always a good starting point. Those that do not offer
choices normally crossover at 80Hz, which is an excellent crossover point, and is also the
THX
™
standard.
If you use this “small” speaker set up recommendation go into the DD’s “SYSTEM SETTINGS”
screen and turn the DD’s crossover “OFF” (see page 26).