Message
Re: [disklavier] Re: Speakers vs Stereo
2009-09-18 by Spencer_Lists
it may be the wrong mixer . it may not deal with low impedance inputs correctly. you can try the radio schack cheapo mixer which you can get easily and can return just as easily if it doesn't work. it can be run from a battery which will eliminate any power supply sourced hum. i am not sure if it will like a low impedance input from the rca jacks so you may also need rca to 1/4" phono adapters to use the mic inputs. Radio Design Labs has a variety of solutions but they tend to be pricey. These are what I use on my Live Performance LX pianos but i find the Radio Design Labs devices on E-Bay.
it is quite possible that you have a grounding problem causing the hum or a bad shield on one of the wires. especially if youhave an impedance mismatch and need to compensate by added gain, it can be extreme. all the connecting cables must be of good quality. no reason to go nuts with monster cables for $50 each but they should not be cheapos either. substitute different ones and see if it makes a difference. oxidation on contacts can be the problem but most devices and cables use gold plating today and this should not be a problem in new stuff. it is possible that you have a ground loop and need to isolate either the power supplies or the input to the mixer.
there are so many possible sources for hum that unless you have an oscilloscope it is best to just substitute parts, starting with the most readily available until you fix it. even a tiny section of unshielded cable (or really badly shielded cable) can cause a lot of hum so quality can really make a difference. if possible do not buy cables at radio schlock. they are generally very bad. a good stereo shop should have intermediate quality cables that should work. for rca cables. the ones that come with av equipment are generally OK even the cheap ones because they have to be decent for video. crappy adapters can cause problems so try to avoid them.
Friday, September 18, 2009, 9:38:36 AM, you wrote:
Hi Bill,
I hooked the Rolls MX22 mixer to the output jacks on the E3 unit and got sound through the speakers but with a hum . Yamaha suggessted I could try the Omin out jack ,same results. Any thoughts?
Thanks,
Joe
--- In disklavier@yahoogroups.com, "jschembri2000" wrote:
>
> Thanks Bill,
>
> I look forward to it's arrival.
>
> J
> -- In disklavier@yahoogroups.com, Bill Brandom wrote:
> >
> > Hi Joseph,
> >
> > You will have good results with the mixer. The issue is an impedance mis-match. The mixer will allow you to compensate for the mis-match. As Carol said, the Disklavier is designed for powered speakers. The mixer will allow you to use to stereo system in its place. Sound quality will be good.
> >
> > Bill
> >
> > Bill Brandom
> > Senior Technical Manager
> > Keyboard Division
> > Yamaha Corporation of America
> > Phone: 714.522.9417 | FAX: 714.522.9301
> >
> >
> >
> > -----Original Message-----
> > From: disklavier@yahoogroups.com [mailto:disklavier@yahoogroups.com] On Behalf Of jschembri2000
> >; Sent: Friday, September 11, 2009 6:41 PM
> > To: disklavier@yahoogroups.com
> > Subject: [disklavier] Re: Speakers vs Stereo
> >
> > Hi Carol,
> >
> > Thank you for the infomation .
> >
> > My thought was not to have an extra pair of speakers in the room , if I could get good sound quality out of the stereo .However, I'm not opposed to buying the speakers and will look at what you suggested.
> >
> > In the intermin I ordered the mixer Yamaha suggested and will post the results.
> >
> > Regards,
> > Joseph
> >;
> >
> >
> >
>; > --- In disklavier@yahoogroups.com, "Carol Beigel" wrote:
> > >
> > > Anytime you connect speakers to a Disklavier, they must be POWERED
> > > speakers - like as in heavy because they have their own power supply.
> > > Historically we have used Advent speakers that cost $300. However, just
>; > > bought a pair of M-Audio Stupdiophie AV40 speakers for $135 for my desktop
> > > computer. They might also work for a DKV.
> > >
> > > I own a MarkIIXG and the audio is monaural. Still sounds great with one
> > > large Yamaha studio speaker.
> > >
> > > Carol Beigel
> > >
> > > ----- Original Message -----
> > > From: "jschembri2000"
> > > To: <disklavier@yahoogroups.com>
> > > Sent: Friday, September 11, 2009 11:31 AM
> > > Subject: [disklavier] Speakers vs Stereo
> > >
> > >
> > > > Hi
> > > >
> > > > I tried to hook my DU1E3 (which comes with no speakers) to my stereo
> > > > system unsuccessfully.Yahama suggested using a Rolls MX22 mixer to boost
> > > > the output from the E3 unit. Any comments about the sound quality would be
> > > > appreciated.
> > > >
> > > > Thanks
> > > > Joseph
> > > >
> > > >
> > > >
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> >
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> >
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> >
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--
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