I guess you really need to take notice of the purpose for which a manufacturer has designed a speaker if it isn’t an all-rounder. How would that speaker sound as a stereo pair rather than a centre-channel for example? I wonder what the audio hi-if shop would think if I rocked up with a function generator and oscilloscope to audition a pair of speakers :). I’m intrigued to see where you are taking this and how we use this knowledge in design (and compensation??) terms. Thanks, very interesting.
That would be awesome to see someone walk in with a scope to check out the speakers for an audition🤣 Thanks, I hope to make this easy to follow by starting this way.
Thanks again for sharing your knowledge! :-) I was wary surprised about your setup, I would have thought that the signal generator would just send the signal direct to the scope, because the clamps and probes is almost connected together. I am confused that the signal first go via the cable to the speaker, the same path back again trough the wire an in the scope, or the path with highest impedance. By the way, if we say that your result was wary important, could you have compensated for the non linearity you started having in your scope?
I’m glad to have you on the team! The generator has to put current thru the speaker or load, then the current probe measures how much current is injected. The voltage probe measures the voltage at the speaker or load input. Then the ohms are found by Ohms law, Voltage divided by the current. I’ll show schematics to talk to so to make it more clear. I’m glad to get feedback. I have done this so long I forget what comes natural. I really want to make a bunch of experts out there.
Thanks for asking. It will probably be just fine. Have you tried it yet? It will probably just not put out max power into 3 ohms but it should go close;)
Good idea! Perform measurements using the Bode chart function. Ω_sp = V_sp (CH1) / I_sp (CH2). However, since the gain is a log scale, it is subtracted and converted. As the audio frequency, can you ignore the frequency response of the oscilloscope itself?
Thank you! Yes you have to divide the log by 20 and then take the antilog to get Ohms. And yes, even a 10 MHz scope is far more than capable. Nice to hear from you!
@@KissAnalog Thank you for your reply! As you say, the value was obtained only by anti-log calculation. 7.943 [Ohm] = 10 ^ (18 [DB] / 20 [DB]) However, the units of voltage and current of the oscilloscope are the same for CH1 and CH2. I am currently planning to buy an oscilloscope. ( For personal use ) I found your site while comparing the oscilloscope models. Applications are development of hobby FPGA, development of audio amplifier, ... and other fun electronic development. For the time being, SDS1204X-E is the first choice, but I am still lost. (^ ^)
A scope can be a great thing, and it is a big choice. I think the SDS1204X-E is a great choice. It has 4 channels! Deep memory (14 Mbits shared by each 2 channels), a deep 1Mbits for the FFT which it also has nice FFT functionality (display signal options as well as set up options). It has the digital bus decoding. And with 4 channels it can do Bode plots With the AWG option. If you are developing FPGAs, you most likely will want the 16 channel option. With the generator and 16 dig channel options, the price starts getting high. The GW Instek MSO (mixed signal like the GW Instek MSO-2104EA) series is a great option at the Siglent price with options.
@@KissAnalog I ordered SDS2304X. Further examination revealed that the 16CH and AWG options each require a dedicated box. I think that the manufacturer did in order to lower the price of the main body of SDS1000X-E. As you know, the desk top for debugging is narrow. Of course my desk is too small. (^ ^) Adding two things like a black lunch box to a target board and an oscilloscope on a narrow desk makes me feel awkward. On the other hand, the only hardware needed with the SDS2304X is the small Logic Probe for 16 CH and the coaxial cable for AWG. I chose it with cost performance and easy to obtain. I was a little disappointed that I could not select your recommended model. Currently, I am looking forward to the arrival of the oscilloscope. Immediately, I added pins for debugging for connecting 16CH Logic Probe to the FPGA of the amplifier board currently being designed.ed pins for debugging for connecting 16CH Logic Probe to the FPGA of the amplifier board currently being designed.
歌舞喜 WOW! This is a great time to purchase that scope!! The price is amazing!! I know they have their new line so they have to sell this line, but it is such a powerful scope! If you need the digital channels - I think you found the best one out there! I can’t wait to hear how you like it! ;)
![[LIVE] MCHOICE & MINT AWARDS 2024 at TRUE ICON HALL, ICONSIAM](http://i.ytimg.com/vi/wMewUeT5nbY/mqdefault.jpg)
That's interesting, not just a single speaker coil but other components with in speaker cabinet.
A crossover network as well.
ATB Adam
Yes, it’s kind of fun wondering what the sweep will reveal;)
I guess you really need to take notice of the purpose for which a manufacturer has designed a speaker if it isn’t an all-rounder. How would that speaker sound as a stereo pair rather than a centre-channel for example? I wonder what the audio hi-if shop would think if I rocked up with a function generator and oscilloscope to audition a pair of speakers :). I’m intrigued to see where you are taking this and how we use this knowledge in design (and compensation??) terms. Thanks, very interesting.
That would be awesome to see someone walk in with a scope to check out the speakers for an audition🤣
Thanks, I hope to make this easy to follow by starting this way.
It’s a great idea to cover the building blocks and then bring it all together.
Andrew Johnson Thank you - just trying to keep it simple;)
Thanks again for sharing your knowledge! :-)
I was wary surprised about your setup, I would have thought that the signal generator would just send the signal direct to the scope, because the clamps and probes is almost connected together. I am confused that the signal first go via the cable to the speaker, the same path back again trough the wire an in the scope, or the path with highest impedance.
By the way, if we say that your result was wary important, could you have compensated for the non linearity you started having in your scope?
I’m glad to have you on the team!
The generator has to put current thru the speaker or load, then the current probe measures how much current is injected. The voltage probe measures the voltage at the speaker or load input. Then the ohms are found by Ohms law, Voltage divided by the current. I’ll show schematics to talk to so to make it more clear.
I’m glad to get feedback. I have done this so long I forget what comes natural.
I really want to make a bunch of experts out there.
@@KissAnalog Thanks! I do not know if I ever will be an expert, but you have surely teached me a huge amount until now! :-)
I appreciate that - and I can already tell that you will be;)
I have a 3 ohm speaker and I want it to go to a 4 ohm amplifier, how can I solve it?
Thanks for asking. It will probably be just fine. Have you tried it yet? It will probably just not put out max power into 3 ohms but it should go close;)
RESPECT 🙋♂️
Good idea!
Perform measurements using the Bode chart function.
Ω_sp = V_sp (CH1) / I_sp (CH2).
However, since the gain is a log scale, it is subtracted and converted.
As the audio frequency, can you ignore the frequency response of the oscilloscope itself?
Thank you! Yes you have to divide the log by 20 and then take the antilog to get Ohms. And yes, even a 10 MHz scope is far more than capable. Nice to hear from you!
@@KissAnalog
Thank you for your reply!
As you say, the value was obtained only by anti-log calculation.
7.943 [Ohm] = 10 ^ (18 [DB] / 20 [DB])
However, the units of voltage and current of the oscilloscope are the same for CH1 and CH2.
I am currently planning to buy an oscilloscope. ( For personal use )
I found your site while comparing the oscilloscope models.
Applications are development of hobby FPGA, development of audio amplifier, ... and other fun electronic development.
For the time being, SDS1204X-E is the first choice, but I am still lost. (^ ^)
A scope can be a great thing, and it is a big choice. I think the SDS1204X-E is a great choice. It has 4 channels! Deep memory (14 Mbits shared by each 2 channels), a deep 1Mbits for the FFT which it also has nice FFT functionality (display signal options as well as set up options). It has the digital bus decoding. And with 4 channels it can do Bode plots With the AWG option. If you are developing FPGAs, you most likely will want the 16 channel option.
With the generator and 16 dig channel options, the price starts getting high.
The GW Instek MSO (mixed signal like the GW Instek MSO-2104EA)
series is a great option at the Siglent price with options.
@@KissAnalog
I ordered SDS2304X.
Further examination revealed that the 16CH and AWG options each require a dedicated box. I think that the manufacturer did in order to lower the price of the main body of SDS1000X-E. As you know, the desk top for debugging is narrow. Of course my desk is too small. (^ ^) Adding two things like a black lunch box to a target board and an oscilloscope on a narrow desk makes me feel awkward. On the other hand, the only hardware needed with the SDS2304X is the small Logic Probe for 16 CH and the coaxial cable for AWG. I chose it with cost performance and easy to obtain. I was a little disappointed that I could not select your recommended model.
Currently, I am looking forward to the arrival of the oscilloscope. Immediately, I added pins for debugging for connecting 16CH Logic Probe to the FPGA of the amplifier board currently being designed.ed pins for debugging for connecting 16CH Logic Probe to the FPGA of the amplifier board currently being designed.
歌舞喜 WOW! This is a great time to purchase that scope!! The price is amazing!! I know they have their new line so they have to sell this line, but it is such a powerful scope! If you need the digital channels - I think you found the best one out there! I can’t wait to hear how you like it! ;)