I have a pair of BM5a speakers, unfortunately one side is not working (dead amplifier)
What would it take to repair it?
I imagine I need a mini DSP but I have no idea how to start
What would it take to repair it?
I imagine I need a mini DSP but I have no idea how to start
You imagine a mini DSP.. Does this mean you want to get rid of the original electronics? (also means you'll do the crossover from scratch?)
Yeah, I was wondering if this is easy to do…
Is it simply a matter of getting the right cable to hook up the mini dsp, then figuring out what the crossover should look like?
I did go to the service center it’s roughly $400usd for the replacement part, did not seem worth the repair, since the speakers are old and I have no idea how long the electronics on the other (working) speaker will last!
I bought another studio monitor but since the drivers on this one are working I was wondering if I could do something with it
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You won't be able to tell what the original crossover looked like if it isn't functioning. Unless this information comes along, you have two clear directions and it's about which one you are comfortable with.
I do have one working speaker…
How would I figure out what the crossover looked like from the working one?
How would I figure out what the crossover looked like from the working one?
Moderation knew from post 2 that this is a (Dynaudio) active monitor,
so not only in the wrong forum, but also without any crossover as seen
in passive multi way speakers. Many answers are useless for this reason.
If OP wants to convert his unit to passive, he should have stated this as
early as in post 1 together with all useful information like manufacturer.
so not only in the wrong forum, but also without any crossover as seen
in passive multi way speakers. Many answers are useless for this reason.
If OP wants to convert his unit to passive, he should have stated this as
early as in post 1 together with all useful information like manufacturer.
Thanks as_audio, your advice has been passed on to the team. If you have anything to add, please report again or use the PM system to discuss moderation matters.
In this thread I understand we're still in discovery mode... A crossover is mostly an acoustic concern, and this is the forum for designing a crossover.. dsp or passive.
In this thread I understand we're still in discovery mode... A crossover is mostly an acoustic concern, and this is the forum for designing a crossover.. dsp or passive.
I expect we can do something with a two way Dynaudio speaker. Seen one, and you've seen them all IMO. About 2.5kHz crossover I expect, here a passive one.
Of course good advice depends on precise details...
But really, I would unplug it from the mains and have a little delve inside. Your local Dynaudio center is doubtless quoting for an entire new electronic gubbins. You may find some obvious scorch mark or blown fuse or broken wire or broken solder joint.
TBH, most of us here got interested in DIY audio when our speakers blew up. Main thing is to roll up your sleeves and have a bash. How hard can it be? 🙂
Of course good advice depends on precise details...
But really, I would unplug it from the mains and have a little delve inside. Your local Dynaudio center is doubtless quoting for an entire new electronic gubbins. You may find some obvious scorch mark or blown fuse or broken wire or broken solder joint.
TBH, most of us here got interested in DIY audio when our speakers blew up. Main thing is to roll up your sleeves and have a bash. How hard can it be? 🙂
If you're using them as studio monitors with 4 or 8ch audio interface, you can use your DAW as a crossover. Just get 4ch of digital amps and measurement microphone. I think finding another unit or amp board is more cost effective and easier though.
If it's completely dead, you'd suspect the power supply rather than the two amp/filter modules. Is there a power indicator light? And power supplies aren't hard. Usually a fused transformer, diode rectifier and smoothing capacitors.
I guess there are way too many things I dont really know at this point:
1) is it better to do a passive or active crossover?
Either way, it would need to be off the shelf, I do not have the expertise required to design or make one at this point
2) for active, what would the bill of materials be?
2a) speakon Female for speaker
2b) minidsp 2x4hd
2c) poweramps - what poweramp is suitable?
2d) cable to connect speakon on the speaker to poweramp - what cable is this?
2e) cable to connect poweramp to minidsp
2f) do i need a dac that goes to minidsp? is the minidsp itself the dac?
2g) some way to prevent myself from blowing up the speaker by passing the bass inputs to the tweeter... no idea what this would look like
2h) equipment to measure the working speaker and figuring out what the crossover is supposed to look like. No idea what equipment this is, would a simple multimetre work?
2i) fabricate new back panel
2j) Do i need a UMIK?
2k) would it be better to mod both speakers?
3) for passive, what needs to be done?
a) off the shelf crossover
https://dynaudiodata.blob.core.windows.net/media/3049/bm_5a_mkll.pdf
Crossover Frequencies: 1500 Hz
Crossover Slope: 6 dB/oct
b) female passive speaker connectors
c) fabricate new back panel
d) power amp to power the speaker
e) speaker cable from power amp to speaker
f) it seems like thats it?
1) is it better to do a passive or active crossover?
Either way, it would need to be off the shelf, I do not have the expertise required to design or make one at this point
2) for active, what would the bill of materials be?
2a) speakon Female for speaker
2b) minidsp 2x4hd
2c) poweramps - what poweramp is suitable?
2d) cable to connect speakon on the speaker to poweramp - what cable is this?
2e) cable to connect poweramp to minidsp
2f) do i need a dac that goes to minidsp? is the minidsp itself the dac?
2g) some way to prevent myself from blowing up the speaker by passing the bass inputs to the tweeter... no idea what this would look like
2h) equipment to measure the working speaker and figuring out what the crossover is supposed to look like. No idea what equipment this is, would a simple multimetre work?
2i) fabricate new back panel
2j) Do i need a UMIK?
2k) would it be better to mod both speakers?
3) for passive, what needs to be done?
a) off the shelf crossover
https://dynaudiodata.blob.core.windows.net/media/3049/bm_5a_mkll.pdf
Crossover Frequencies: 1500 Hz
Crossover Slope: 6 dB/oct
b) female passive speaker connectors
c) fabricate new back panel
d) power amp to power the speaker
e) speaker cable from power amp to speaker
f) it seems like thats it?
What does that mean? No light fitted, or there is a light and it's not glowing? 😕
I have just finished helping someone with a similar speaker:
https://www.diyaudio.com/forums/multi-way/378445-dynaudio-bm6-monitors-crossover-3.html#post6826579
This for the 4 ohm 17XL midbass and the usual dynaudio tweeter. It would be marginally different for the 8 ohm 6" woofer. And yours may be the 5" woofer.
I have just finished helping someone with a similar speaker:
https://www.diyaudio.com/forums/multi-way/378445-dynaudio-bm6-monitors-crossover-3.html#post6826579
This for the 4 ohm 17XL midbass and the usual dynaudio tweeter. It would be marginally different for the 8 ohm 6" woofer. And yours may be the 5" woofer.