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How many here is into DIY audio?

post #1 of 31
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hey guys, thought id see how many of you were into DIY audio?

For me part of my love for audio which has to be my biggest money pit....even over computers.

I am planning to rebuild an old turntable from Lenco, Garrard, or Thorens and then to build some bottlehead amps with a foreplay 3 preamp for music.

However first of all I am working on a pair of high sensitive monitors with a Beyma TPL ribbon(technically pleated diaphram) tweeter and then a 15" midbass woofer.

aiming for higher 90s 1w/1m sensitivity and maybe add a 8 or 10 for mid later down the road.....

Will also build a HTPC down the line too

also considering a class D amp from classdaudio.com.....we will see what I do for amps.....

What everyone else working on?
post #2 of 31
Sounds like a great speaker project. TPL-150? I wonder how much bottom end loading it gains once baffle loaded. Personally I wouldn't want to cross a 15" any higher than ~900hz....

The TDTPL horn would bolster up the bottom end response enough to handle a lower x-over pretty well. In fact, you could have matching horizontal dispersion at about a 900hz x-over for both the horn loaded TPL and the 15" driver (~80 degrees). The controlled vertical dispersion would reduce floor and ceiling reflections. All around I must admit it should be a fantastic speaker if you can nail down the x-over design. Once you pick out a woofer you'll have to share with us your plans for achieving a good x-over design.

Any thoughts on which 15" driver?

Regarding final sensitivity, high 90s is probably only going to happen if you use a sub to fill out the baffle step loss and use a pretty wide baffle design on the mains. If these are on their own, then I'd say the final sensitivity would be between 90 and 96dB depending on how much baffle step compensation your speaker placement needs, and how much bottom end extension you want (driver selection related).

You'll have to post some picts of the project when you get going.

It's been quite a few years since I've built speakers, but am really itching to do another project or at least do some major upgrades to some of my existing speakers.

Eric
     
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post #3 of 31
I'm into DIY headphone audio. Speakers are just too expensive! Anyways, I built an M^3 amp from AMB, along with a 24v DC powersupply. For a DAC, I built the Gamma1 and 2. The Gamma2 offers more connectivity options, up-sampling, anti-clipping, and a few different filters over the Gamma1.

I also made a case for each the power supply and amp. I can get some pictures up if anyone would like. thumb.gif

They were really fun projects!
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post #4 of 31
I'm starting something soon that I planned out a while ago, which is a pair of extremely high power full bias Class-A monoblock power amps. I plan to combine PC cooling experience with what I know of amps and make them really high power, unlike most Class-A amps. Usually they're not high power due to heat issues, hoping some cnc-machining and water cooling will fix that!
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post #5 of 31
Thread Starter 
Quote:
Originally Posted by Monstrous View Post

I'm starting something soon that I planned out a while ago, which is a pair of extremely high power full bias Class-A monoblock power amps. I plan to combine PC cooling experience with what I know of amps and make them really high power, unlike most Class-A amps. Usually they're not high power due to heat issues, hoping some cnc-machining and water cooling will fix that!

are you doing one of the Pass designs like the F5 or F5 turbo? I was really interested in doing one of those as well but I may wait until after some bottlehead amps to do one....we will see

My plan for speakers has actually changed a bit in the last week. I started to look at some horned options but then went back to the TPL because it is something that I can continue to build on rather than start from scratch. I have also decided that I am going to use a 10" driver with it because it will be better for the crossover and mids. Later down the road I will either build an additional cab for a 12 or 15 to go lower or make a single cab for a complete monitor. Until then my subs will handle the lows.I also like this approach because of the fact that I can keep a two way for the center channel as there is no need for the extreme lows in the center...I simply refuse to make the convenient compromise that all the manufacturers do and accept the lobbing problems in a woofer-tweeter-woofer center alignment.

for crossover I am actually going to go a different route at first. I am going to go active with a MiniDSP until I can measure and determine the best points to cross at. After that is done I will try and get a passive crossover made with nice components....not "exotic" nice but nice enough that it will sound good and not be the weak link in the system....
post #6 of 31
Thread Starter 
Quote:
Originally Posted by NewAtOCing View Post

I'm into DIY headphone audio. Speakers are just too expensive! Anyways, I built an M^3 amp from AMB, along with a 24v DC powersupply. For a DAC, I built the Gamma1 and 2. The Gamma2 offers more connectivity options, up-sampling, anti-clipping, and a few different filters over the Gamma1.
I also made a case for each the power supply and amp. I can get some pictures up if anyone would like. thumb.gif
They were really fun projects!

you should look at bottlehead.com they have some tube headphone amps and the "quickie" can be used as a head phone amp as well....its technically a battery powered preamp but can be modified....bottlehead actually ecourages it....
post #7 of 31
Quote:
Originally Posted by madbrayniak View Post

Quote:
Originally Posted by NewAtOCing View Post

I'm into DIY headphone audio. Speakers are just too expensive! Anyways, I built an M^3 amp from AMB, along with a 24v DC powersupply. For a DAC, I built the Gamma1 and 2. The Gamma2 offers more connectivity options, up-sampling, anti-clipping, and a few different filters over the Gamma1.
I also made a case for each the power supply and amp. I can get some pictures up if anyone would like. thumb.gif
They were really fun projects!

you should look at bottlehead.com they have some tube headphone amps and the "quickie" can be used as a head phone amp as well....its technically a battery powered preamp but can be modified....bottlehead actually ecourages it....

Thanks for the suggestion, but I really prefer solid state to tube amps with my current headphone. tongue.gif

Tube amps make my Denons sound too bass heavy and kinda ruin the mids.
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post #8 of 31
Thread Starter 
Quote:
Originally Posted by NewAtOCing View Post

Thanks for the suggestion, but I really prefer solid state to tube amps with my current headphone. tongue.gif
Tube amps make my Denons sound too bass heavy and kinda ruin the mids.

interesting. It probably has something to do with the Ohms of your headphones not being matched to the amp. I know that matters alot with the tube amps. I am running AKG 124 mk2 headphones and love them....granted they aren't anything extreme but I got a great deal on them when I got them and really like them. Only think i wish was stronger was the bass.....other than that they are very nice and smooth sounding and the highs are not too harsh
post #9 of 31
You can keep your tubes smile.gif I like the dry lifeless distortion free sound of modern solid state smile.gif
     
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post #10 of 31
Quote:
Originally Posted by madbrayniak View Post

interesting. It probably has something to do with the Ohms of your headphones not being matched to the amp. I know that matters alot with the tube amps. I am running AKG 124 mk2 headphones and love them....granted they aren't anything extreme but I got a great deal on them when I got them and really like them. Only think i wish was stronger was the bass.....other than that they are very nice and smooth sounding and the highs are not too harsh

That is a major part of it for sure, the volume knob becomes sooo sensitive with tubes because of the low impedance cans. Other than that, I think the natural coloration of my headphones doesn't work particularly well with tube amps.
Quote:
Originally Posted by mdocod View Post

You can keep your tubes smile.gif I like the dry lifeless distortion free sound of modern solid state smile.gif

Ha, you wouldn't be saying that if you heard what I do.... sassy
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