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Post pics of your builds.... - Page 581

post #8701 of 9604
Quote:
Originally Posted by b1o2r3i4s5 View Post

@ Jake
Nice speakers!!

Anyway, Here's a pic of my DIY CIEMs.
The don't look pretty like the professional ones, but works perfectly!
The drivers are from UE TF10's, bought them on Head-fi FS forums.
(Click for high-res.)
LL
Shouldn't you get a back plate on there?
Won't the circuitry get damaged due to moisture and all that good stuff when you put it in your ears in the current state?

Anyway, very nice work.
post #8702 of 9604

QUOTE:

Shouldn't you get a back plate on there?

Won't the circuitry get damaged due to moisture and all that good stuff when you put it in your ears in the current state?

 

Yes, I'm still missing a Faceplate, but they won't really get damaged by the moisture in my ears because the opening is on the outside.

post #8703 of 9604
Quote:
Originally Posted by b1o2r3i4s5 View Post

Yes, I'm still missing a Faceplate, but they won't really get damaged by the moisture in my ears because the opening is on the outside.
Do you think you could make it out of metal?
You could attach it by supergluing it to the CIEM, shouldn't be too difficult. (or use whatever kind of glue)
post #8704 of 9604
Quote:
Originally Posted by Tilpo View Post

Do you think you could make it out of metal?
You could attach it by supergluing it to the CIEM, shouldn't be too difficult. (or use whatever kind of glue)

Sure. Now that I think about it it's a pretty good idea.

Gonna do that tomorrow.

post #8705 of 9604
Quote:
Originally Posted by funch View Post

Dang, Jake! Them's awful purtty. What's driving 'em?

Thanks funch!

At the moment, nothing of note. I have been using a NAD AVR and a small T-amp. The goal was to build a foundation speaker to begin experimenting with different amplifier technologies and implementations. So, you could say the first leg of the journey is complete, but really, the trip has just begun. wink.gif
post #8706 of 9604
Quote:
Originally Posted by jdkJake View Post

Thanks funch!

At the moment, nothing of note. I have been using a NAD AVR and a small T-amp. The goal was to build a foundation speaker to begin experimenting with different amplifier technologies and implementations. So, you could say the first leg of the journey is complete, but really, the trip has just begun. wink.gif

Good luck in your journey!
Always make sure to test power amps with a dummy load and take measurements before connecting speakers!!

 - Speaking from experience.... frown.gif

 

I'm planning a power amp build in the future too, for my Bi-amp system.

post #8707 of 9604

jdkJake:  Dude you should post that to "Hackaday" I'm sure they'd love that there too.  :)

post #8708 of 9604
Quote:
Originally Posted by jdkJake View Post


Thanks funch!
At the moment, nothing of note. I have been using a NAD AVR and a small T-amp. The goal was to build a foundation speaker to begin experimenting with different amplifier technologies and implementations. So, you could say the first leg of the journey is complete, but really, the trip has just begun. wink.gif

 

Sound like a perfect 'excuse' to build a B24.cool.gif

post #8709 of 9604
Quote:
Originally Posted by jdkJake View Post

*snip*

 

What started as this:

 
IMG_1905.jpg
 

Has become this:

 

IMG_3928.jpgIMG_3934.jpg

 

These are Elsinore MkV speakers. The design is by Joe Rasmussen, the build is my take on the project.

 

*snip*

 

I am at the moment i,m on with a speaker build and i understand how hard it is to build speakers of this kind of grade, I hope to be showing mine off to you all soon :)

post #8710 of 9604

it is from someone i know and i think ill post it here because i think it its cool =)

 

its a DIY output "energizer" for akg k1000. it has an input of 4-8 ohms and it has a switch for 32 to 120 ohm ( for k1000 ) output. it is used for any amps with 4-8 ohm so that the k1000 should be getting what is "needed"

 

263

 

 

 

dscf3313n.jpg

 

 

dscf3316c.jpg

post #8711 of 9604
Quote:
Originally Posted by funch View Post

 

Sound like a perfect 'excuse' to build a B24.cool.gif


i've seen a lot of jdkJake lately over at DIYA, pretty sure hes already got his head full of ideas. the B24 seems a good amp, but I think Jake has widened his horizons a little further than a speaker amp designed by a headfi kit seller. much as I think the SuSy thing is cool and the B24 aint no B22 on steriods, it would not be my first choice for these, the ellisnores are pretty darned efficient and want current drive dont they? B24 is pretty solidly in the voltage amp camp and with waaay OTT wattage I would think. maybe an F4 Jake?

post #8712 of 9604
Quote:
Originally Posted by qusp View Post


i've seen a lot of jdkJake lately over at DIYA, pretty sure hes already got his head full of ideas. the B24 seems a good amp, but I think Jake has widened his horizons a little further than a speaker amp designed by a headfi kit seller. much as I think the SuSy thing is cool and the B24 aint no B22 on steriods, it would not be my first choice for these, the ellisnores are pretty darned efficient and want current drive dont they? B24 is pretty solidly in the voltage amp camp and with waaay OTT wattage I would think. maybe an F4 Jake?

redface.gif. Probably an F5 first, just to wet the feet.

We will see where we go from there....
post #8713 of 9604

ha sorry Jake, didnt mean to put words in your mouth, i've just seen you posting a fair bit over there lately in multiple forum areas.

 

F5..which one? haha theres like 5 or 6 of them at least. plain vanilla DIYA store boards? definitely look at the F4, from my reading the ellisnore's prefer current drive. you would need a source or preamp with a bit of voltage gain, maybe +6-12dB (or just add a bit of gain to your dac's IV stage); as the F4 has current gain only.

 

 

this is some of the stuff on my bench at the moment, the only thing headphone related is the LPUHP, which will also make superb headphone amps, but are mainly for my tweeters.

 

the first are fully regulated 'SMPS' very_evil_smiley.gif seen by many as the devil (see details and measurements in spoiler) but these are designed for audio. Higher voltage +/-65vdc regulators for the front end and +/-55vdc 16A regulated outputs for the fets all with bugger all capacitance and 400gms each. they are for the lateral fet 'the wire' also pictured. all going together for 6 balanced power amp channels for multiway digitally crossed DIY speakers. with multichannel USB->i2s and multiple ESS dacs.

 

i'll post pics when its all done, but anyone looking at building power amps these days should really give SMPS another look.

 

more involved technical description for those interested (Click to show)

 

I'm looking forward to playing with these suckers (first 2 pics) on my 'the wire' power amps (second set, Mosfets will be soldered in once on the heatsink) they are the DPS-600 from Audiopower; hardcore PSUs. Finally we are starting to see SMPS designed for audio by music lovers. These are 600W fully regulated power supplies and only 400gms each. they have separate +/-65vdc regs for the front end and +/-55vdc 16A regulated main output for the Lateral fets. according to the designer, SMPS is a fairly poor description of them, as the high current output stage is basically a Class A amp. great attention has been paid to keeping the critical midrange free of the residual that plagued early SMPS

 

As well as a digitally controlled power unit, I also get a free fast break which will pull the rails to ground using a logic low or high, so can be leveraged for a very effective DC protection (all my amps are DC coupled and no crossover..so..) output is only enabled after the rails are steady (about 500ms) and this state change is also available as a signal on the pinheader.  i'll be using this signal to increase the bias automatically, as although the LME front end reg can supply more than 1A pretty easily, they dont like starting up into more than ~380mA but after start up i'll ramp it up to about 600mA for more Class A, then theres other sundries like short circuit, overtemp, overload, UVLO error,  LEDs, remote switching etc etc. to round it out.

 

did I mention its tiny?

 

the transient response redefines stiff rails and they have very low noise and EMI/RFI. Independent measurements i've seen with them powering the amp, have the main outputs barely flinching with 100Hz full power 250W transients (now added below) rather than the sag you would get with even a pretty OTT linear unregulated supply (think more than 1kVA and 100000µF a channel).

 

Its all rather exciting and a little bit daunting, should be excellent. i'm putting them together with the amps and the 2 x LPUHP down the bottom for a 6 channel power amp for diy multiway speakers i'm building, with software based digital crossover/convolver and multiple ESS dacs (Ackodac). integrating the whole thing with a beaglebone and a few xbees for controlling display, remote (wifi) multichannel volume control by interfacing with the ES9012's, sequenced start/shutdown and maybe even intelligent controls like checking ambient temp and weather forecast before setting bias. the possibilities are endless.

 

measurements of the amp in dB/v ie. referenced to 1V

 

700

 

700

 

100Hz full power transients. the red and blue traces are the power supply rails at +/-65vdc. nothing I would describe as sag

700

 

 

 

it took a bit of convincing to get me to buy SMPS, but the performance is like nothing ive seen without basically building another pair of amps to power your amps; basically what these are.

 

I plan to try and put my feet up for a while after this build and my speakers are done, the whole thing will have done some major wallet damage over the last couple of years, i'd rather not add it up.

 

1000

 

1000

1000

 

 

 

 

1000

 

 

 

1000

1000

 

1000

 

1000

1000


Edited by qusp - 7/20/12 at 8:11am
post #8714 of 9604

If only those SMPS's were available for us NA folks :( Are those Scanspeak 4530's?

post #8715 of 9604

yeah thats a bitch eh? tongue.gif

 

theres another similar model, the DPS-500 which is universal voltage. hes actually just received the new ones with the same upgraded power unit; its a bit more expensive and higher power than the dps-600. (800W vs 600W) if you need any customization it can take a while.... but he does deliver (took 40 days for our GB (30 units). He did fully rework the front end regs for us so they are higher rather than lower voltage for us (+/-65vdc vs what is normally just a single 12-15vdc) and he did that all by hand, it just took longer than estimated... I expect just buying one of the standard stock units would not be as problematic

 

this was done so the fets can swing right into the rails without clipping the output, or rather without the input stage clipping. another neat feature is that you have +/-5% adjustment and it will proportionately increase the main outputs to match the FE outputs. looks sweet too IMO

 

 

Quote:
Are those Scanspeak 4530's?

close but not quite, they are SS 18W/8531G0 8ohm uncoated 6.5" tongue_smile.gif


Edited by qusp - 7/20/12 at 8:39am
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