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GIZMO EXPERIMENT (Read 10731 times)
4krow
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GIZMO EXPERIMENT
03/13/15 at 01:52:30
 
Guys, Some of you may not be familiar with the 'Gizmo' offered by Decware in the catalog. It is a transformer device put in series with drivers that tend to have that harsh midrange. I have just purchased a pair of Audio Nirvana drivers that I will be working with, but I happen to know that they tend to have a bit of this midrange problem. Thing is, the Gizmo eliminates that completely, and I'm wondering if it isn't also a better load for the amp. Finally, it occurs to me that the FRX2 drivers utilize a transformer as well. I will not guess as to whether it is the exact same thing going on, but it enhances the performance of the FRX2 there is no doubt about that. Photos to follow when things get rolling. I already have the drivers and have barely begun break in. "Giz-Guts" is what I ordered last week, and they will arrive next week.
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Decware 34I.3 integrated amp/Forte' 3 bass amp/Velodyne SMS-1 bass mngmnt system/Decware ZOB speakers/Audio Nirvana 8" bass drivers/Xiang Seng DAC/ LR Audio Computer/Rega Apollo R CDP/Emotiva ERC3 CDP/BPT 3.0 power cond.
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will
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Re: GIZMO EAXPERIMENT
Reply #1 - 03/13/15 at 02:19:23
 
Looking forward! I have been thinking about Audio Nirvana for some time.

Thanks,

Will
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4krow
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Re: GIZMO EXPERIMENT
Reply #2 - 03/13/15 at 04:04:20
 
Here are the drivers side by side. I want to see if I can get the AN speakers to perform anywhere near what I would like.
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Decware 34I.3 integrated amp/Forte' 3 bass amp/Velodyne SMS-1 bass mngmnt system/Decware ZOB speakers/Audio Nirvana 8" bass drivers/Xiang Seng DAC/ LR Audio Computer/Rega Apollo R CDP/Emotiva ERC3 CDP/BPT 3.0 power cond.
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4krow
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Re: GIZMO EXPERIMENT
Reply #3 - 03/18/15 at 00:45:39
 
Unfortunately, you can't see what I am going to comment on about the AN drivers, but I will post photos when I have made a change to the binding post arrangement of the speaker. The thing is that the tweeter has a perfectly good push button connector  for wiring, but the woofer has those smaller than you think Chinese 5-way binding posts that make wiring a challenge for me. What looks to be a binding post actually can't use the banana plugs that we are accustomed to using here in the US, and even if it did, they are placed under the magnet structure that prevents them from being used anyway. You guessed it, this led to one more of my alterations that fit my needs. I just happened to have a set of push button posts that all are tall, but with a little ingenuity, they should be a good change for the driver.
Today I received the GIZMO kit for the drivers, and sometime soon all of this will be implemented.
 In the D.I.Y. section of the Decware site, the GIZMO units are not mentioned. This is the second pair of these that I have purchased, and they really fill the bill for taming certain drivers (they even have a variable control that adjust to a certain driver, making them versatile for more than just the Lowther drivers for which they were designed).
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Decware 34I.3 integrated amp/Forte' 3 bass amp/Velodyne SMS-1 bass mngmnt system/Decware ZOB speakers/Audio Nirvana 8" bass drivers/Xiang Seng DAC/ LR Audio Computer/Rega Apollo R CDP/Emotiva ERC3 CDP/BPT 3.0 power cond.
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4krow
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Re: GIZMO EXPERIMENT
Reply #4 - 03/18/15 at 21:56:33
 
Drivers are done. A few photos that show the new bass driver binding posts. I will show the original posts in the next episode, as well as the finished product.
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4krow
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Re: GIZMO EXPERIMENT
Reply #5 - 03/18/15 at 21:59:07
 
a few more
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4krow
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Re: GIZMO EXPERIMENT
Reply #6 - 03/18/15 at 22:00:26
 
next
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4krow
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Re: GIZMO EXPERIMENT
Reply #7 - 03/18/15 at 22:01:37
 
last one[font=Georgia][/font]
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Decware 34I.3 integrated amp/Forte' 3 bass amp/Velodyne SMS-1 bass mngmnt system/Decware ZOB speakers/Audio Nirvana 8" bass drivers/Xiang Seng DAC/ LR Audio Computer/Rega Apollo R CDP/Emotiva ERC3 CDP/BPT 3.0 power cond.
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will
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Re: GIZMO EXPERIMENT
Reply #8 - 03/18/15 at 22:46:44
 
Looking good!
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4krow
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Re: GIZMO EXPERIMENT
Reply #9 - 03/19/15 at 01:33:30
 
Thanks Will. It was a bit more trouble than I would like, but now, the drivers are more user friendly for me. I got them finished today and hooked them up. No fair making any judgements yet, as the drivers are not broken in and I probably haven't found the optimal load for the GIZMO. It will all come in time. I have done this experiment before, but with the top of the AN line for 8" drivers. They were not co-axial, and used ALNICO magnets.
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Decware 34I.3 integrated amp/Forte' 3 bass amp/Velodyne SMS-1 bass mngmnt system/Decware ZOB speakers/Audio Nirvana 8" bass drivers/Xiang Seng DAC/ LR Audio Computer/Rega Apollo R CDP/Emotiva ERC3 CDP/BPT 3.0 power cond.
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4krow
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Re: GIZMO EXPERIMENT
Reply #10 - 03/24/15 at 19:51:46
 
A little update. Got most everything set up to break in the new drivers. Have a choice of two caps so far. The 2.2uf is a little too bright, and now the .47uf is a bit too dull. Waiting for a 1.0, 1.5 and a 1.8 to arrive.
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Decware 34I.3 integrated amp/Forte' 3 bass amp/Velodyne SMS-1 bass mngmnt system/Decware ZOB speakers/Audio Nirvana 8" bass drivers/Xiang Seng DAC/ LR Audio Computer/Rega Apollo R CDP/Emotiva ERC3 CDP/BPT 3.0 power cond.
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Re: GIZMO EXPERIMENT
Reply #11 - 03/24/15 at 20:38:36
 
One more thing....here is a shot of the BSC circuit that I made, designed by Bottlehead. It works at the line level, and not the speaker level, so power is not wasted by the power amp. It accomplishes needed EQ by dropping the midrange level, shelved at particular frequencies as chosen per the black knobs. No amplification involved that way.
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Decware 34I.3 integrated amp/Forte' 3 bass amp/Velodyne SMS-1 bass mngmnt system/Decware ZOB speakers/Audio Nirvana 8" bass drivers/Xiang Seng DAC/ LR Audio Computer/Rega Apollo R CDP/Emotiva ERC3 CDP/BPT 3.0 power cond.
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4krow
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Re: GIZMO EXPERIMENT
Reply #12 - 03/29/15 at 18:06:48
 
 This will be the last post for awhile on this experiment. The short time that I have listened to the new drivers with the Gizmo and 1.5 uf caps, has led me to be very positive about the outcome that the Gizmo has.
Not stopping there, because I did a really crazy thing and bought a set of Audio Nirvana 12" drivers. The reason for this is simply that I have never heard larger diameter, full range drivers.  Yup, I gotta build cabinets for them, and I will start another thread to document the build. You know me, it's not going to be 'standard'.
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Decware 34I.3 integrated amp/Forte' 3 bass amp/Velodyne SMS-1 bass mngmnt system/Decware ZOB speakers/Audio Nirvana 8" bass drivers/Xiang Seng DAC/ LR Audio Computer/Rega Apollo R CDP/Emotiva ERC3 CDP/BPT 3.0 power cond.
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will
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Re: GIZMO EXPERIMENT
Reply #13 - 03/29/15 at 18:36:07
 
4K,

So are the new speakers keepers! Any possibility of pics?

Thanks for keeping us in the loop. Interesting the gizmo. It would seem the 12 inch may not need them...will be interesting if you find any need?

Have fun!

Will
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All Modified: PSA-P5>DIY Strip/Shunyata Defender>RevolutionMacMini/Amarra-KTE Singxer/Gustardx20pro/ZBIT/CSP3>OldChen 300B/845, Torii IV>Omega S-A-H-O monitors/SVS Micro3000>Pi PCs-DIY PCs, ICs, USB, I2S, Speaker-SR and aluminum w ball bearing feet
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Re: GIZMO EXPERIMENT
Reply #14 - 04/07/15 at 15:23:06
 
At this point, I have decided to build a set of cabinets as recommended by the designer. Because of a low Xmax and a low Q, these drivers were actually designed for a bass reflex enclosure. The Gizmo however, was a success at arriving to a decent frequency balance. Interestingly, though it made sense, I changed the setting of the Gizmo as the drivers continue to break in. For the cabinet build, I will start another thread in the project and modification DIY thread. This project won't start until I complete the 12" driver project.
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Decware 34I.3 integrated amp/Forte' 3 bass amp/Velodyne SMS-1 bass mngmnt system/Decware ZOB speakers/Audio Nirvana 8" bass drivers/Xiang Seng DAC/ LR Audio Computer/Rega Apollo R CDP/Emotiva ERC3 CDP/BPT 3.0 power cond.
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