14Kohm at the RCA jacks
14Kohm at the RCA jacks
And it looks like the output impedance of the Squeezebox Touch at analog outputs is about 600ohm from what I could find.
I thought about that, but what attenuation would you suggest Fred?
Experiment .If the input impedance is actually 14k then 7k in series will give a 3 db reduction in signal,and 14k will cut the signal in half( -6db) .Adjust to peference.
There might be space for a resistor behind the RCA jacks on the back panel of the speakers. Thanks for the idea Fred and it shouldn't be too hard to find an audio grade 14K resistor. I don't like the idea of another componey in the signal path, but I won't know until I try it.
Are you sure you want to start with a full -6db of attenuation?Anyway IMO a single 1 % metal film resistor should be sonically benign.
Extremely transparent resistors. http://www.partsconnexion.com/resistors_vishay_var.html
And for those with only marginal OCD:biggrin: http://www.partsconnexion.com/resistors_caddock_mk.html and for those without.http://www.partsconnexion.com/resistors_holco.html
Let me see where my wallet puts my level of OCD... :mrgreen:
The B1 in a sheet metal chassis for function, not form. It sounds great, but as my brother commented; "That's ugly".
Changed out the caps in my B1 last night for red, film Audiophiler ones from China. I'm not expecting much, but so far they sound like the original ones without any hours on them.
Just ordered some 25k Caddock MP925 non-inductive resistors to try in a few places and see what sounds best when lowering the output a little.
Thanks for the suggestion guys!
Soldered the 25K resistors in front of the 25K attenuator, but didn't notice any decrease in overall volume. Interestingly, the sound may have sharpened up a little, but I would guess that would be from the source now seeing twice the input impedance then it previously saw. I'll keep working on this...
Nekkid Z-foil up close....from a thread at diyaudio, taken with a polarized light AM4113ZT-A Dino-lite usb cam. $ Ka-ching $.
Sexy! Mine don't look as good, but they do sound good!
I was doing some listening over the weekend comparing the B1 with SMD stepped attenuator to my Luminous Audio Axiom II passive which uses an ALPS blue velvet pot. As I have 7ft ICs to run to my speakers, I thought an active buffer might benefit the system in order to drive those long ICs, and help with any impedance issues between the Squeezebox and the speakers.
The Axiom is very pleasant and creates a nicely balanced image and sound; The sound stage is very centered. The pot is a little unbalanced at low levels, but not during regular listening. The B1 is a little more dynamic, but splits out the instruments more with a very defined sound stage that places the musicians in specific spaces. While listening to Rebecca Pidgeon, the B1 placed her to the left of center and her supporting violin to right of center. This is probably a more accurate presentation of the music, but the Axiom centers her voice with the violin behind her and to the right. The B1 feels more like a stage performance, but the Axiom is easier to listen to for normal listening.
I then placed the B1 at the output of the Axiom, and the result sounded exactly like the B1 alone. To me, this means the the B1 is leaving its own signature on the signal, whether good or bad to your ear, which the Axiom with single pot is doing a better job of simply attenuating and passing the signal.
Just a few observations...
Upgrade the B1's caps and this won't be as much of an issue, if an issue at all.
Are you saying my red "Audiophiler" caps aren't the best available?!? :)
No, not at all. :)
Recommendation for caps in a smaller enclosure? Might mount the B1 in this passive preamp. :cheesygrin:
I know the Obbligato makes a smaller body film cap (.8" tall for 10uf). If I can't find anything else I'll probably go with the ESAs (1.8" tall for 10uf), so I'll have to measure and see how much space I have.
Jake in the post 101 picture the interconnects on the right with red and white on the RCA's look just like my cheap Phillips interconnect i have...Is that what they are? Actually they are pretty good for 6.00 interconnects:wink:
Thanks but a little more than I want to spend; I think the ESA is my top for Clarity Caps.
Ever tried or heard ANSAR Supersound film caps?
Sorry, I haven't heard ANSAR caps.