Could I build some nice affordable bookshelf speakers with MDF, purchase of tweeters and midbass and the crossovers? Are there any projects you know of that are affordable that sound better than the typical prefab bookshelf speakers? Like with a complete BOM and perhaps even instructions? Is MDF a suitable enclosure or is solid wood needed?
mdf is a good material to use.
many sotres sell them cut to your specified sizes.
for a bit of extra they will allso cut the holes for the drivers, vents, binding posts.
so if you can use a cordless drill, and have some craftsmanship in you for carpentry, it is not that hard.
there are a lot of excellent designs all over the net, depending on where you live and what drivers can you get for affordable prices, its not rocket sciense anymore.
and diy speakers have a huge advantage over any prefab speaker ever made.
you can account for the listening conditions in your design, you can shape the enclosure a it to fit its designated space better than a prefab.
designing a crossover is allso not witchcraft, there is a more than excellent article about them here:
Passive Crossover Network Design
te site might be in your interest, as it has information about both active and passive solutions regarding crossovers.
you might notice, many even highly priced and highly regarded speakers crossover lack some components discussed regarding passive crossovers.
and they do make a difference.
many sotres sell them cut to your specified sizes.
for a bit of extra they will allso cut the holes for the drivers, vents, binding posts.
so if you can use a cordless drill, and have some craftsmanship in you for carpentry, it is not that hard.
there are a lot of excellent designs all over the net, depending on where you live and what drivers can you get for affordable prices, its not rocket sciense anymore.
and diy speakers have a huge advantage over any prefab speaker ever made.
you can account for the listening conditions in your design, you can shape the enclosure a it to fit its designated space better than a prefab.
designing a crossover is allso not witchcraft, there is a more than excellent article about them here:
Passive Crossover Network Design
te site might be in your interest, as it has information about both active and passive solutions regarding crossovers.
you might notice, many even highly priced and highly regarded speakers crossover lack some components discussed regarding passive crossovers.
and they do make a difference.
Hey guys been super busy with studio work and my jobs too but I thought I would make things a bit clearer for yous and say exactly what’s going on just to make it easy.
I think the problem is a lost cause as it’s probably because of the cheap amp but if there is a simple way around it I would be stoked!!
My setup: Pair of Faital PRO 3FE22 3inch running in stereo.
Pair of Dayton Audio ND91-4 3.5inch in parallel for bottom end using the built in crossover that’s in the amp. I think they are sensitive speakers.
What I have tried:
On AC power (laptop powersupply)
Volume turned to 0 and I get a shhh but it’s acceptable.
Volume turned to 0 and shorting out the inputs (shorting left–right–ground all together) has no effect.
Volume turned to 0 and shorting the ground of the input to the power supply negative (ground) has no effect.
Volume up full the shhh gets about 5x louder.
Volume up full shorting out the inputs (shorting left–right–ground all together) cuts the shhh down by about 40% which is still to loud :/
Volume up full and plugging in a good sony discman or other devices has no effect.
I’ve tried the capacitor and resistor across the inputs “mod” and that has no effect.
On battery power: same as above. It does exactly as what the AC power does.
Any input on this issue would be greatly appreciated and I’ll do a bit more research and digging around and see what I can come up with
Cheers
An externally hosted image should be here but it was not working when we last tested it.
The only way all of this fits together must be about the following:
Amplifier flowchart:
Input --> tone control --> volume control --> power amp
The tone control / input circuit would appear to be noticeably noisy, but not quite as noisy as your source. (You didn't state whether/how noise level changes in the second case with the various kinds of sources. Is it the same for both a short and a discman? If not, possibly Class D amplifier noise is coupling back into input cabling. You are using proper shielded cable, right?) I presume there's like 100K pots in the tone control, and possibly not the lowest-noise opamp ever?
Your only chance of getting noise levels acceptably low is driving the amplifier input about as hot as it'll take, and then using its volume control as main volume. This may mean extra line-level amplification in case of a very wimpy source.
Amplifier flowchart:
Input --> tone control --> volume control --> power amp
The tone control / input circuit would appear to be noticeably noisy, but not quite as noisy as your source. (You didn't state whether/how noise level changes in the second case with the various kinds of sources. Is it the same for both a short and a discman? If not, possibly Class D amplifier noise is coupling back into input cabling. You are using proper shielded cable, right?) I presume there's like 100K pots in the tone control, and possibly not the lowest-noise opamp ever?
Your only chance of getting noise levels acceptably low is driving the amplifier input about as hot as it'll take, and then using its volume control as main volume. This may mean extra line-level amplification in case of a very wimpy source.
what do you mean? second case???
I use canare cabling (alloy shield with a braid) I don’t think it’s the cable as if I disconnect the cable it has no effect either as it still has the shhh
Basically the same outcome what ever source I use, laptop, ipod, maudio output card from desktop computer, cell phone, discman…. The cell phone had a bit more interference but that was expected as I didn’t have it in flight mode haha…. What ever source I had around the house I have tried.
The thing is I can drive it loud and no one will notice the shhh until a quiet part of a song comes on, it is especially annoying when watching a movie too as there are a lot of quiet parts in them.
thanks guys so much 🙂 🙂
I use canare cabling (alloy shield with a braid) I don’t think it’s the cable as if I disconnect the cable it has no effect either as it still has the shhh
Basically the same outcome what ever source I use, laptop, ipod, maudio output card from desktop computer, cell phone, discman…. The cell phone had a bit more interference but that was expected as I didn’t have it in flight mode haha…. What ever source I had around the house I have tried.
The thing is I can drive it loud and no one will notice the shhh until a quiet part of a song comes on, it is especially annoying when watching a movie too as there are a lot of quiet parts in them.
thanks guys so much 🙂 🙂
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