Velodyne ULD-15 Owner's Manual
Velodyne ULD-15 Owner's Manual

Velodyne ULD-15 Owner's Manual

Series ii subwoofer systems
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Velodyne
OWNER'S MANUAL
ULD-15, ULD-18
Series II Subwoofer Systems

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Questions and answers

Gordon Porter
March 18, 2025

How do I connect two Velodyne ULD 15” with there controller to my Rx-z9 Yamaha receiver

1 comments:
Mr. Anderson
May 14, 2025

To connect two Velodyne ULD-15 subwoofers with their controllers to a Yamaha RX-Z9 receiver, follow these steps:

1. Determine Output Type: The Yamaha RX-Z9 has a single line-level subwoofer output (mono).

2. Split the Signal: Use a Y-adapter (1 male to 2 female RCA) to split the subwoofer output from the receiver into two.

3. Connect to Controllers:
- Run one RCA cable from one side of the Y-adapter to the "FROM PRE-AMP" input (right or left) on the first ULD-15 controller.
- Run another RCA cable from the other side of the Y-adapter to the "FROM PRE-AMP" input (right or left) on the second ULD-15 controller.
- Leave the unused "FROM PRE-AMP" input and both "TO POWER AMP" outputs on each controller unconnected.

4. Subwoofer Connection: Each ULD-15 subwoofer connects to its respective controller using the dedicated servo interface cable.

This setup allows the Yamaha RX-Z9 to send the same subwoofer signal to both ULD-15 subwoofers.

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Summary of Contents for Velodyne ULD-15

  • Page 1 Velodyne OWNER'S MANUAL ULD-15, ULD-18 Series II Subwoofer Systems...
  • Page 2 Purchase __ _ _ _ _ _ _ _ Name of Store _ __ _ _ _ __ _ __ _ OWNER'S MANUAL VELODYNE ULD-15 AND ULD-18 SERIES SUBWOOFER SYSTEMS Co ngratulatio ns on your purchase a Velody ne es II Subwooler System.
  • Page 3 PR E·AMP FUSES POWER SERVO CONTROLLER --Dc). Ie" 0000 --=t+=====--====-J:~~~=!~-ll-J 50160 HZ 7 AMPS CAUTION CO NNECT SPEAKER SPEAKER LEADS TO REO SHIELDED:---l EADS BLACK TO BLACK PHONO CABLE • [-i-, -"- • Figure 1: Basic Installation UNDERSIDE OF ULD-15/18 CABINET...
  • Page 4 Once you the subwoofer level. the proportion of bass to midrange and treble outpul will remain conslant. The Velodyne controller may used tine tune the bass output desired Crossover Modification : Your subwoofer has an active crossover network.
  • Page 5 INSTALLING TWO ULD-15/18 SUBWOOFERS AS A STEREO PAIR Although a single ULD Series Subwoofer dramatically enhances any quality audio system many listeners mand additional power effect of stereo ULD-IS/18s. Figure 3 shows interconnection details. stereo installation right and left ULD Series Subwoofer...
  • Page 6 High voltage power supply fuse (+ or -): type Low voltage power supply fuse or -): 3 amp type 2. Velodyne unit plays shuts down occasionally : Your ULD system's protection circuitry been activated. turning system volume subwoofer level down slightly.
  • Page 7 Your satellite spea kers may make slight noise as the ULD contro internal hig h-pass crossover is powered prevent this problem switch your Velodyne on before applying power to you power For service please contact yo local Velody ne dealer. The following conditions a/ways...
  • Page 8 Distortion products introduced by con- ventional woofers actually make the entire bass spectrum sound louder. Our Solution Velodyne ULD Series Subwoofer System produces sound in the same manner conventional loudspeaker a cone·shaped piston forced to move by means...
  • Page 9 At Velodyne, the use of motional feedback is appl to make what is already a large powerful woofer achieve a level of performance that has never...
  • Page 10 VElODYNE SUBWOOFER SYSTEM SPECIFICATIONS ULD-18 SERIES II ULD-15 SERIES High Efficiency AMPLIFIER: High Efficiency Discreet Class Discreet Class 400-Wal1s RMS continuous 400-Watls continuous 300 mV/20k ohms INPUT SENSITIVTY/ IMPEDANCE mV120k ohms nominal nominal DAMPING FACTOR >1000 >1000 DRIVER: 3/4" linear travel 5/8"...
  • Page 11 SAFETY INSTRUCTIONS F UECTRIC SHOCK NOT OP{N CAUTION: To reduce the risk of electric shock. remove cover (or back). user-serviceable parts inside. Refer servicing to qualified service personnel. lighting flash with arrowhead symbol, within an equilateral triangl e. is intended alert the user to the...

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Uld-18

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