REL Acoustics No. 25, Руководство по эксплуатации

Страница: 21 / 33

20
When connecting to a home cinema system where there is a .1/LFE channel output, connect a single RCA to RCA
or XLR to XLR cable between the sub output of the processor/receiver and the .1/LFE input jacks on the REL.
1 Positioning: The optimal position for a single REL No.25 is in one of the corners behind the main speakers.
This position provides 9 dB of mechanical amplification and allows for the most linear true low bass
wave launch, owing to the ability to tune the REL’s crossover to the longest distance in the room in
order to produce the longest, therefore lowest frequency, bass waves.
1a. Stereo Set-Up of No.25: (see page 21 through 23 for Stereo Set-Up procedure). When this step has
been completed, proceed to Number 2, immediately below.
2 The Process: To begin the set-up process, choose a piece of music that has a repetitive bass line that is
very low in frequency. We suggest track 4 from the soundtrack to Sneakers (Columbia CK 53146). This
has a repetitive bass drum throughout that gives you plenty of time to move the woofer around, but
more importantly, the venue was quite large for this recording, and therefore it has a very deep and
large-scale bass signature. This track is perfect for the set-up process and should be played at the highest
reasonable level expected for system playback.
Working with a partner, one in the listening position and one at the REL manipulating the controls, is
the most effective and efficient way to set up the REL. If working alone, the initial steps in the set-up can
be very effectively carried out from the location of the REL. Trying to ignore all other music in the track,
listen for the bass drum and its effect on the listening room.
3 Phase Orientation: Once in the corner, we need to adjust for phase. This may be the single most critical
step, and because it really is quite simple, it is often over-thought. Keep in mind; the right phase is
whichever position is the loudest or fullest. While playing music with true low bass, adjust the crossover
to a point where the REL and the speaker are sure to share frequencies at 50Hz on the crossover control,
or slightly higher for smaller speakers. At this point turn the HI/LO LEVEL control up so that both the REL
and speaker are roughly equal in volume and then switch, using the phase switch, from “0” to “180”
phase positions. Again, whichever position is loudest or fullest is the correct position. That is, when the
position is working in harmony with your main speakers, reinforcing bass, not canceling it.