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In Reply to: RE: brought home a Velodyne dd-18 on friday posted by Jon L5 on May 27, 2007 at 15:22:52
Changes in volume are indicated by a morse code on the blue-lighted Velodyne logo. Alternatively, you can use the remote control presets to lock onto preselected volume levels.
Follow Ups:
(a) when you say "Changes in volume are indicated by a morse code on the blue-lighted Velodyne logo" you mean when the blue logo turns on/off while we press the volume of the subwoofer up/down ? or something else ? because I think what Jon is looking for is a numeric indicator that could allow him go back to a previous volume level, am I right Jon ?
(b) when you say "Alternatively, you can use the remote control presets to lock onto preselected volume levels" can you explain me more how to do that please ? thanks in advance, best, Antonio Machado.
a) correct. Every sub I've ever had has had a volume knob on it. It's a trivial thing, really, but it is convenient to be able to turn it up or down temporarily and then return to the calibrated volume without having to turn on the projector. The preset buttons will probably work fine. I just need get more familiar with all of the features.
Yes, it would be nice to have a digital readout of the volume level. But if the room light is low enough, you can determine the volume level after each change by decoding the long/short flashes of the blue logo.
In my 2CH system, I find that one custom EQ setting, crossover point/slope, and servo control level, suffice for both analog & digital sources my system. Therefore I programmed the remote control presets as mainly a stepped volume control, going from flat to about +8db gain in deep bass. It appears that the digital software in the sub is smart enough to bring the sub volume up in a non-linear fashion, such that the cross-over region stays flat while increases are progressively applied down into the bass region. Even in a hybrid HT/2CH system, when all is said and done I think this approach would work, maybe with one preset devoted to a HT setting with a bump up in EQ in the mid-bass region.
I also have an Aurelex platform over sprung floors. This really helps. Your addition of more damping layers on top of the foam platform is intriguing.
Did you upgrade to 2.2 software? I'm just getting around to this & curious whether it effects bass perfomance or just the user interface.
Dave
Hello amigo: I tried my DD15 "without" the original feet, placed directly, flat over the Auralex Subdude with bad results, the sound was dead, the worst effect ever. Then I tried the DD15 "with" the original feet over the Auralex Subdude, not bad, but there was room for improvement, then I continued trying many different configurations. At the end, I got the best results replacing the original feet by 4 Megamounts (from www.mapleshaderecords.com) which I ordered with the exact thread size of the holes of the DD15. Big improvement ! so I decided to go all the way to the top and added the 4" thick mapleshade wood platform plus the additional 4 Megamounts screwed underneath. Improved again. Now, as you can see in my configuration, the thick Platfoam under the Subdude is the vertical center of the Isolation System, for it absorbs both the macrovibrations coming from the suspended wood floor "and" the microvibrations coming from the subwoofer. Thank you for the suggestion about 2.2 software, I'll take a look to it. Question: did you try to rotate your subwoofer so it doesn't fire directly to you ? is better when it fires toward the right or left, not toward you. Question: do you have bass traps in the corners near from your subwoofer ? that will be the icing on the cake. No doubt the Velodyne Digital Subwoofers are one of the best ever built. Looking forward to your answers and comments. Best, Antonio Machado.
Antonio,
Quite an isolation plaform you have there. Which Mega-Mount size did you use? Those are some serious brass slugs. I have a metal lathe & may spin up some DIY versions, or perhaps some solid maple pucks. I replaced the sorbothane suspension in my VPI TNT with solid maple pucks & noted quite an improvement in precision & perceived "speed" vs the stock sprung suspension.
One thing I've got going for me is a low 30hz crossover to the sub. A low xover point avoids many potential problems, and would presumably unburden the platform of the need to improve precision in the more audible upper bass region. Does your platform improve things all the way down, or more in the upper bass region?
My DD-15 is positioned about 1' out from the corner in a 16' x 17' x 9' room, pointed slightly wide of the listening position. I'm sure I can refine set-up further. Another thing I want to look into is the input caps used in the plate amp. I've made a fair number of coupling cap substitutions in other components & have been surprised how much improvement a good coupler like the V-Cap makes in deep bass control & extension.
Regards,
Dave
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