[rodgersorgan] Re: Subwoofer Hook-up
- From: "John G. (Jack) Cormack" <jackjack@xxxxxxxxxxxxxxxx>
- To: rodgersorgan@xxxxxxxxxxxxx
- Date: Wed, 20 Nov 2002 13:13:51 -0500
At 11:53 PM 11/19/2002 -0800, you wrote:
>
>
>Hi List...
>
>In anticipation of having my 340 Theatre Organ here in the not too distant
>future, I'll be using a stereo-style subwoofer for my pedal channel.
>
>I"m looking for the correct way to hook it up to the organ speaker system.
>
>My subwoofer is a brand new Velodyne CHT-15 (15-inch) and on the back of
>thisspeaker, as far as connections, there are 2 "in" RCA ports, 2 "out" RCA
>ports and then p the the same amount of in and out for the bare wire that
>hasto be tightened with the screwing of the cap to keep the contact.
>
>2 Questions....
>
>First, which set of connections can/should I use to connect this sub from
>theconsole with?
>
>Second, will I need a second speaker to run in parallel with the Velodyne
>subin order to get the upper range of pedal channel voices like all the 8
>foots and/or a coupled 4 foot as in a "calliope" sound if that's what the
>music calls for. I seem to recall a very knowledgeable person telling me
>there is a crossover inside the organ that can dictate where the pedal
>channel will go....eg, to only the sub or to the sub and the other speakers.
>
>
>The Velodyne stats are:
>
>Freq response of 23 to 120 Hz High Pass Crossover (6 dB/octave slope):
>80Hz or 100Hz
>
>
>Low Pass Crossover (12 dB octave, 24 dB ultimate):
>40Hz-120Hz (adjustable)
>
>
>Dynamic Power: 750 watts
>RMS Power: 300 watts
>Inputs: Line-level and speaker-level
>Outputs: Line-level and speaker-level
>Crossover bypass: Subwoofer Direct
>
>Anyways, if anyone has used a Velodyne as their sub, I'd be very interested
>in hearing how it was setup and how it works and if you needed a second
>higher frequence speaker for the higher notes.
>
>Thanks very much for the assistance.
>
>Patrick L.
>
>340 Custom
===================================================================
Hello Patrick:
We use a Velodyne 18 inch subwoofer on our Rodgers T-927 organ. I don't
know anything
about how the various stops are directed to the amplifiers in the 340. In
the 927 each stop can
be directed to any of the 8 channels, so the pedal stops are directed to a
line that goes to
the Velodyne. The Velodyne crossover in our case is set at about 80 Hz.
The 1200 watt
amplifier inside of the Velodyne handles frequencies from 16 Hz to the
crossover. Inside the
Velodyne speaker cabinet the low frequencies of the crossover go to the
internal amplifier and
then to the internal Velodyne speaker. The crossover output is before going
to amplifiers, so the
"out" connectors on the subwoofer cabinet are at a low level and need to
go to amplifiers/speakers.
The two "in" connectors on your Velodyne cabinet should receive the pedal
channel output from the organ.
The two "out" connectors on your Velodyne cabinet should go to an
amplifier/speaker that will handle
all the frequencies above the crossover frequency. You will need to do
some adjustment of the
volume control on the Velodyne cabinet to balance the loudness of the pedal
stops in relation to
the other stops on the organ. You will be pleased with the solid bass
response you get from the
Velodyne.
I also have an 8 inch Velodyne subwoofer and two JBL "bookshelf" speaker
cabinets connected
as my computer sound system. This system is connected so that all line
output from the
sound card in the computer goes the "in" connectors on the Velodyne 8 inch
subwoofer, the
"out" connectors then go to a stereo amplifier that drives the two JBL
speaker cabinets.
Since I am not familiar with the amplifier(s)/sound channel(s) of the 340,
perhaps it could be
connected the same way as my computer Velodyne/JBL sound system is connected.
I hope that the above is helpful. Please email me if you need further
information.
Sincerely,
Jack Cormack
Potomac, Maryland
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