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Discussion Starter · #1 ·
Hi,

I recently bought a Gizmo / WAF-1 package. I have the Gizmo hooked up to a few sources but I noticed a bit of muddy distortion when I play some CDs through a Pioneer DV-563A. I'm thinking perhaps the Pioneer's output is too hot for the Gizmo. I have the 563A connected to the Gizmo through standard RCA cables from the 2-channel output.

According to the user manual, the output from the 563A is 200 mVrms (1kHz, -20 dB). I'm not very technically oriented so I'm not sure what that all means exactly.

If the 563A is too hot, would adding attenuators to the RCA jacks be an okay solution? I have pairs of 6 dB and 12 dB attenuators that I can add, if that would help (and not hurt.)

Thanks,
Greg
 

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Greg,
The spec you posted for the Pioneer is actually 2Vrms @ 1KHz at full output.

Your -6dB attenuator should drop the level, if the input impedance of the Gizmo matches the impedance spec for the attenuator. If this is not enough, then go to the -12dB attenuator.
 

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Greg, to take HAL's comments a bit further, let me provide you with some input:

T[FONT=&quot]he source volume control is independent of the Gizmo V1.0M and both can be adjusted. Bear in mind you potentially have several volume controls involved in your system – the Gizmo V1.0M, the source (CD Player, PC, etc.) and the subwoofer gain. If you are using a PC, you may also have a volume control embedded in iTunes or Windows Media Player. If you find you are overpowering your subwoofer amp, getting feedback/scratchy audio, distortion or some other unwanted audio problem, the first place to look is at the aforementioned volume controls – it is likely one or more is set to max. When setting up your Gizmo V1.0M system set the various volume controls in the midrange and adjust until you get the volume/effect you are looking for. Generally, setting Gizmo V1.0M volume around 25 and using the volume control of your source produces the best results.

[/FONT]Your post indicates this might be the problem.
 

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Ray,
The source he is having problem with is a DVD player with no volume control. If I remember correctly 2 volts in too high for the Gizmo.
 

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Discussion Starter · #5 ·
The source he is having problem with is a DVD player with no volume control.
Yup. Just a line-out 2-channel connection - no variable volume control.
I tried the attenuators and that seemed to make a difference. Will test more as I can.
 

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Discussion Starter · #7 ·
I'm looking for other possible to solutions to my issue detailed in the original post above. Any ideas? (From searching, I realize I'm not the only person with this problem.)

When I use 12 dB attenuators (from Harrison Labs), the distortion goes away, but the music sounds veiled and less dynamic. If I remove the attenuators, the sound is better, but some CD's distort. I don't have a decent pair of 6 dBs attenuators to use and something tells me they'd still subtract from the dynamics of the input.

I realize that many people just hook up digital audio players or PCs to their Gizmo, but I have a large CD collection and don't plan on ripping them to the PC at this point. I have hooked up my PC to the Gizmo using the ****** Lyra wireless sound card and the sound is actually pretty good. If only I could hook up a reliable CD or DVD player that doesn't cause distortion, I'd be in heaven!

Are there any reliable CD/DVD/SACD players I can use that aren't as hot as my 563A? Or should I consider the Gizmo my failed experiment and start looking for a different amp?

I see past references to the Gizmo 1.1 fixing this issue but it appears that now the v1.1 is now abandonware (?).
 

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There was some lengthy and transparent posting about the Gizmo in general a couple of months back. We announced that the Gizmo v1.1 would not be produced and cited the reasons.

I just wanted to clarify because of the connotation of "abandonware". :angel:
 

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Doesn't Craig have some Oppo players (I know he has the new Blue Ray player)? Does the Gizmo work with them without clipping? If so, an Oppo would be a good combo.
Are there any reliable CD/DVD/SACD players I can use that aren't as hot as my 563A? Or should I consider the Gizmo my failed experiment and start looking for a different amp?
 
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