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Post by pcourtney1 on Jun 17, 2011 23:35:06 GMT
just saw this www.i-amps.com/products/9-volt-products/9-volt-batteryI am thinking it might power my SB Duet (600mAh) in the garden this summer, need a suitable PP3 holder, and the correct DC plug, but before I take the plunge, has anybody used 9vdc batteries with the Duet before ?? Attachments:
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Post by pcourtney1 on Jun 20, 2011 17:57:42 GMT
it would be better of course if the battery could be contained inside the SB receiver, so i thought i would take it apart, and used a T9 star drive to unscrew the 4 screws hidden under the thin rubber label, and placed a PP3 battery inside the case, and there is just enough headroom, but the only place I can put it is on top of two components, the 64mb sdram and the 2mb flash
I am thinking that this might be a bad idea if there is no screen / protection between the battery and the surface mount components, can anyone comment ?
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Post by pcourtney1 on Jul 5, 2011 13:08:06 GMT
the two components are :
Spansion S29AL016D90TF102 ;16Mbit (2MB) Single 3V 90ns FlashRAM
Samsung K4S641632K-UC75 64Mb K-die SDRAM
they both have a very low profile, which is why the PP3 battery can sit on top of them and the case can still be closed.
but one thing has occurred to me, the DC plug on the SBR (Squeezebox Receiver) will need to be used to recharge the PP3 battery inside, so some more investigation needed me thinks
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Post by pcourtney1 on Jul 5, 2011 13:33:11 GMT
and while I am at it, I have heard that the sq via phono RCA output jacks on the Duet can be greatly improved by running direct off the Wolfson DAC to the Analog Output 1.7 volt, which then connects to the Left & Right output from the Wolfson to the RCA phono connectors The Wolfson has "direct to use" analog output 1,7 Volt, so I you can take the L and R right straight to the Neco Soundlab amp must also buffer the 5v PSU of the DAC with a Blackgate Cap nb disconnect the 5 volt regulator and then just feed it with the 9v rechargeable battery I was inspired by this thread forums.slimdevices.com/showthread.php?t=55044Wolfson DAC model WM8501GED ( 14 pins ) 24-bit 192kHz Stereo DAC with 1.7Vrms Line Drive Attachments:
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mrarroyo
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Post by mrarroyo on Jul 30, 2011 12:47:29 GMT
I recently acquired an used Squeezebox Duet, it IMO sounds fuller and more detailed than the older Squeezebox V3. Both are easy to use and I like the ability to download music via internet radio without having to turn the computer on.
The Squeezebox Duet's remote is also nice in that it allows you to control various receivers throughout your residence. A pity I bought for a friend who has been looking for one and thus I will soon take it out of service. BTW, I have not seen these units sell for as little as I got it. Paid $125 USD including S&H and it arrived with all the original packing and materials, at least an 8.5 out of 10 condition.
If you have funds Channel Island sells a 9 VDC linear and regulated PSU for $279 USD.
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Post by Deleted on Jul 30, 2011 12:53:37 GMT
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Post by mrarroyo on Jul 30, 2011 14:10:25 GMT
Alex, is your post on the use of the JLH ripple eater. If so, I am aware of it but as you know I am not a good DIY so I was suggesting an already built unit. Mind you, I have not bought it nor do I plan on buying one. Cheers.
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Post by pcourtney1 on Jul 30, 2011 23:04:58 GMT
makes two owners of Duet on RB then Miguel, given the ease of use and great sq of the Duet I was sure there would be many more of us, but not to worry !
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Post by mrarroyo on Jul 31, 2011 17:20:51 GMT
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Post by pcourtney1 on Aug 6, 2011 23:49:51 GMT
nice rig you have there Miguel, where is your xcan v2, in another room, and part of another setup I guess ...............
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mrarroyo
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Post by mrarroyo on Aug 7, 2011 13:42:23 GMT
nice rig you have there Miguel, where is your xcan v2, in another room, and part of another setup I guess ............... The V2/X10-D combo is in the same room on a rack adjacent to the PC Cabinet. I will take a picture and post it. |
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Post by pcourtney1 on Aug 7, 2011 14:55:03 GMT
I looked at the Channel Islands kit and the "ripple eater" that Alex mentioned, but neither are going to help me achieve better sq if I am powering the Duet using battery power, like the PP3 9v battery I mentioned earlier
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Post by Deleted on Aug 7, 2011 15:41:24 GMT
makes two owners of Duet on RB then Miguel, given the ease of use and great sq of the Duet I was sure there would be many more of us, but not to worry ! Hi pcourtney1 make that three users and i have a Boom also. I've not tried batteries but it sounds like an interesting idea. i have used a teddy reg to power the Duet and was happy with the results so the battery thing may work. Miguel is right though the remote on the Duet is just superb and a pleasure to use. take care |
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Post by pcourtney1 on Aug 7, 2011 21:24:52 GMT
I listened to a Duet powered by a 9v Yuasa battery (like they use in security alarm control panels) , using wifi and over 200 metres away from the house, into the back of a Cute II and my AKG K340 headphones www.audiophileproducts.com/cute2batterysounded pretty darn good to me, so I am hoping to replicate something similar but using a 9v battery inside the Duet and the Neco amp instead of a Cute II Shaun, yes I like the Duet remote as well, but am actually using the free iPad app from Logitech most of the time www.logitech.com/en-gb/speakers-audio/wireless-music-systems/devices/7979 |
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Post by Deleted on Aug 7, 2011 22:48:29 GMT
I listened to a Duet powered by a 9v Yuasa battery (like they use in security alarm control panels) , using wifi and over 200 metres away from the house, into the back of a Cute II and my AKG K340 headphones www.audiophileproducts.com/cute2batterysounded pretty darn good to me, so I am hoping to replicate something similar but using a 9v battery inside the Duet and the Neco amp instead of a Cute II Shaun, yes I like the Duet remote as well, but am actually using the free iPad app from Logitech most of the time www.logitech.com/en-gb/speakers-audio/wireless-music-systems/devices/7979Hi pcourtney1 well done for sorting the battery supply to the duet which is an interesting idea. I'm gonna have to try that when i have some time to spare. take care |
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Post by pcourtney1 on Aug 8, 2011 8:51:24 GMT
gregerskine (Greg) has a Duet as well, and some others in Sydney, but nobody using a PP3 9v internal battery, which I hope is a way forward, after all the main benefit of the Duet to me is the wifi connection, and moving anywhere around the house and garden with it, a nice proposition when used in conjunction with the Neco amp I reckon :-)
I too (like Greg) like the internal DAC in the Duet, and it sounds great with most of my cans
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Post by Deleted on Aug 8, 2011 9:10:26 GMT
Greg is a friend of mine, and intends making a JLH supply for his duet after seeing the excellent results that DIYAudio member Erin from Melbourne obtained when using a JLH.
Will it operate from an 8.2V NiMh battery ?
Alex
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Post by pcourtney1 on Aug 8, 2011 9:40:02 GMT
Hi Alex, does the ripple eater help me if I use an internal PP3 9v 600mAh battery inside my Duet, I don't want to use the pair of Duet's I have with mains power anymore, I figure I will get best results using the rechargeable i-amps battery I mentioned at the beginning of this thread, and some minor internal mods also mentioned www.i-amps.com/products/9-volt-productsI'm just surprised that nobody is using (or thinking of using) the Duet in a nomadic role with rechargeable power, seems a great way to enhance the Duet for me, and get a better sq into the bargain |
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Post by Deleted on Aug 8, 2011 10:09:07 GMT
Hi
A JLH is normally only used after a regulated mains power supply.
In most cases it will outperform a battery due to it's very low noise (<4uV typically) and wide bandwidth.It is also likely to have a much lower impedance than most batteries ,(<.02 ohms typically) although the LiPo that JK recommends are pretty good.
Alex
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Post by pcourtney1 on Aug 8, 2011 18:37:02 GMT
don't understand, I start off a topic with the explicit statement that I want to put a PP3 battery inside my Duet, and you (Alex) and Miguel give me a bum steer in the direction of "Ripple Eaters" and fancy power conditioners costing over $250 bucks, when I have my mains sorted out already by using an APC Smart-UPS RT1000 for my serious listening
can we perhaps get back on track and concentrate on rechargeable baterries for the Duet, and anyone who thinks along the same lines as me that it might be a perfect mate for the Neco Soundlab headphone amp, thanks if we can keep back on track, no offence but I'm not a complete numptie in these sort of things, I don't understand why this thread has to go off course, it was pretty darn simple I thought when I kicked if off
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Post by Deleted on Aug 8, 2011 20:55:53 GMT
I also asked you if an 8.2V NiMh battery was suitable but you didn't answer. They are rechargeable.
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mrarroyo
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Post by mrarroyo on Aug 8, 2011 22:35:12 GMT
Spend money you cheapskate!  |
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Post by rowuk on Aug 8, 2011 22:36:37 GMT
In my experience the lowest impedance and lowest noise rechargeables are LiPo like John Kenny uses. The second lowest are High output Sanyo NiCd used for competition model airplanes.
Lead Acid have never sounded as good as a well built power supply for me except when there was hum.
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Post by Deleted on Aug 8, 2011 22:40:11 GMT
In my experience the lowest impedance and lowest noise rechargeables are LiPo like John Kenny uses. The second lowest are High output Sanyo NiCd used for competition model airplanes. Lead Acid have never sounded as good as a well built power supply for me except when there was hum. Robin Agreed, but in this case they will not fit inside like a rechargeable 8.2V NiMh will. Alex |
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Post by pcourtney1 on Aug 8, 2011 23:07:50 GMT
I also asked you if an 8.2V NiMh battery was suitable but you didn't answer. They are rechargeable. I don't know Alex, the only 2 methods I have tried so far are the Yuasa 9v 800mAh (sealed lead acid), not the way I want to go but sounded pretty good all the same, and 4 x AAA Energiser rechargeable 9v batteries 700mAh rigged up at my house, good sounding, good enough for me anyways, but cannot get 4 of these inside the case of the Duet, so was looking at PP3 sizes instead the key to this I think is getting 2 or 3 hours runtime, and a minimum of 9v 600mAh to have the Duet run properly is the 8.2v you suggest a PP3 size or similar ? |
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