Fault finding an issues with a tweeter array... Is there a right way to check?

[rwillett]

1 hour ago, Suburban Man said:

Very kind! A lifetime spent doing audio 'stuff' and not enough time spent practising those scales 

I can practise scales on your behalf if that helps

[rwillett]

Spent the last hour trying to work out if I have a problem or not.

 

A kind basschatter has sent me eight Goldwood 1016 tweeters. I tested them all with a tone generator on my MacBook using the headphone socket as the output into a small cheap amp and then into cables.

 

As I put a tiny bit of power in, I can hear a high pitched signal, not loud but something is there.

 

I get the same signal when I connect into the Omni 10.5 speaker cab with the main speaker disconnected. 

 

Since I have no idea what a Goldwood should sound like, its entirely possible that this cab is working fine, that my ears are rubbish beyond about 5Hkz (too much deep scuba diving?) and I've spent the last eight weeks worrying over something that's working fine. 

 

I did see that @SpondonBassed had some sort of frequency analyser on his phone at the SW Bass Bash. If he reads this, can he let me know what he was using as it seemed very good.  I'll then check the output and see what the cab is outputting.

 

Thanks

 

Rob

[SpondonBassed]

49 minutes ago, rwillett said:

Spent the last hour trying to work out if I have a problem or not.

 

A kind basschatter has sent me eight Goldwood 1016 tweeters. I tested them all with a tone generator on my MacBook using the headphone socket as the output into a small cheap amp and then into cables.

 

As I put a tiny bit of power in, I can hear a high pitched signal, not loud but something is there.

 

I get the same signal when I connect into the Omni 10.5 speaker cab with the main speaker disconnected. 

 

Since I have no idea what a Goldwood should sound like, its entirely possible that this cab is working fine, that my ears are rubbish beyond about 5Hkz (too much deep scuba diving?) and I've spent the last eight weeks worrying over something that's working fine. 

 

I did see that @SpondonBassed had some sort of frequency analyser on his phone at the SW Bass Bash. If he reads this, can he let me know what he was using as it seemed very good.  I'll then check the output and see what the cab is outputting.

 

Thanks

 

Rob

 

Sorry Rob.  That wasn't me.  I'd help if I could.

 

I haven't been to a SW Bash (yet).  Nor do I use a smart "'phone".  Perhaps you could find said member on the SW Bash thread by re-posting there?

 

Good hunting.

 

 

 

 

 

 

Edited 10 hours ago by SpondonBassed

[rwillett]

@SpondonBassed Apologies. 

 

I was going to ask you "who did I speak to then?" But that would  be stupid so I won't. 

[SpondonBassed]

1 hour ago, rwillett said:

Apologies

 

None needed chap.

 

Boffins gotta boff.

[Stub Mandrel]

5 hours ago, rwillett said:

@SpondonBassed Apologies. 

 

I was going to ask you "who did I speak to then?" But that would  be stupid so I won't. 

 

Me?

 

The 'some kind of spectrum analyser app' is in the Google app store.

 

It's called, 'Spectrum Analyser'.

 

[rwillett]

@Stub Mandrel

 

Thanks. I'll check the Apple store. I thought you had an iPhone. 

[Stub Mandrel]

2 minutes ago, rwillett said:

@Stub Mandrel

 

Thanks. I'll check the Apple store. I thought you had an iPhone. 

 

There's probably something close . 

 

It would be more useful if it normalised to allow for the drop per octave, which would make it easier to interpret. Ah... just checked and you can switch it to A weighting...

[rwillett]

8 minutes ago, Stub Mandrel said:

There's probably something close . 

I've had a look but it means nothing to me.... Oh Vienna

 

8 minutes ago, Stub Mandrel said:

It would be more useful if it normalised to allow for the drop per octave, which would make it easier to interpret. Ah... just checked and you can switch it to A weighting...

 

That sounds.....wonderful.... or something.... is there a decoding wheel available?

 

Thx

 

Rob

[Stub Mandrel]

The speaker demos at the bash looked like a line dropping about 3dB per ocrave with a peak or three. While it was easy to see how some went down to about 70Hz and others more like 120Hz, it would have been easier to interpret if the plot was normalised to get rid of the slope. It would also have been easier to visualise their high frequency performance. 

 

The app has a and c weighting options.

 

A weighting reduces low and high frequencies to refect how the ear percieves loudness.

 

 C weighting is similar but for very loud sounds and is a bit flatter (i.e. doesn't reduce low and high frequencies as much).

 

 

[rwillett]

Thanks. Will see if there is a similar app in the Apple store