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Hey Team,

I'm looking for a continuously-variable sine tone generator for speaker test and QC applications. 

A sine sweep can be very revealing of buzzes, rattles, port noise, driver distortion, etc.  However, the software-based sine tone generators I've met (e.g. smaart) seem to be 'stepped,' both in amplitude and frequency.  That waveform discontinuity, and resulting blast of harmonics, can be very distracting, enough to compromise any real critical listening. Chirp tone playbacks are okay, but you can't 'dwell' on a zone of interest like you can with manual control.

So, I'd like to find a simple hardware device that can generate sine tones at an arbitrary frequency and amplitude, each with a dedicated knob, and a smooth sweeping behavior as the knobs are adjusted.  Kind of like the Meyer Sound SIM hardware sine tone generator. 

Ideally, it would have a line level XLR output, and be compact, and economical.  E.g. not a lab-grade arbitrary function generator with >mHz capabilities...

A bit of googling turned up this Tenma 72-490
https://www.newark.com/tenma/72-490/compact-audio-generator/dp/09P2110 
... which seems to meet my objectives except for XLR out. 

Does anyone have a better recommendation?  Anyone used this device and have real world experience to comment upon?  Thanks!

If you don't want to spend a lot of money but want super high quality look for a transmission test set.  Popular brands are HP, Halcyon, Hekimian, Ameritec  and TTI all popular brands.  The HP 3551A has a Vernier knob for level and frequency and is built like the proverbial brick shit house.  Halcyon (later made by CXR Telecom) 701A was one of the most popular field instruments with the Bell techs and is equally well built, same features. 


You have to add an XLR but that's not a big deal.  I just lop off a short jumper as this equipment has 5 way binding posts.  You can get an XLR to bananas if you a super anal. 


I have the HP 3551A on my bench and use it for servicing hifi and commercial gear.  It's a great piece of kit.


For $100 on flea bay you should be able to acquire a pristine specimen. 

Hey Team,

I'm looking for a continuously-variable sine tone generator for speaker test and QC applications. 

A sine sweep can be very revealing of buzzes, rattles, port noise, driver distortion, etc.  However, the software-based sine tone generators I've met (e.g. smaart) seem to be 'stepped,' both in amplitude and frequency.  That waveform discontinuity, and resulting blast of harmonics, can be very distracting, enough to compromise any real critical listening. Chirp tone playbacks are okay, but you can't 'dwell' on a zone of interest like you can with manual control.

So, I'd like to find a simple hardware device that can generate sine tones at an arbitrary frequency and amplitude, each with a dedicated knob, and a smooth sweeping behavior as the knobs are adjusted.  Kind of like the Meyer Sound SIM hardware sine tone generator. 

Ideally, it would have a line level XLR output, and be compact, and economical.  E.g. not a lab-grade arbitrary function generator with >mHz capabilities...

A bit of googling turned up this Tenma 72-490
https://www.newark.com/tenma/72-490/compact-audio-generator/dp/09P2110 
... which seems to meet my objectives except for XLR out. 

Does anyone have a better recommendation?  Anyone used this device and have real world experience to comment upon?  Thanks!

NTI has an excellent product, it is not cheap but it is good.

https://www.nti-audio.com/en/products/minirator-mr-pro-mr2

It's reported that Mike Pinder of the Moody Blues passed away today.

Hey Team,

I'm looking for a continuously-variable sine tone generator for speaker test and QC applications. 

A sine sweep can be very revealing of buzzes, rattles, port noise, driver distortion, etc.  However, the software-based sine tone generators I've met (e.g. smaart) seem to be 'stepped,' both in amplitude and frequency.  That waveform discontinuity, and resulting blast of harmonics, can be very distracting, enough to compromise any real critical listening. Chirp tone playbacks are okay, but you can't 'dwell' on a zone of interest like you can with manual control.

So, I'd like to find a simple hardware device that can generate sine tones at an arbitrary frequency and amplitude, each with a dedicated knob, and a smooth sweeping behavior as the knobs are adjusted.  Kind of like the Meyer Sound SIM hardware sine tone generator. 

Ideally, it would have a line level XLR output, and be compact, and economical.  E.g. not a lab-grade arbitrary function generator with >mHz capabilities...

A bit of googling turned up this Tenma 72-490
https://www.newark.com/tenma/72-490/compact-audio-generator/dp/09P2110 
... which seems to meet my objectives except for XLR out. 

Does anyone have a better recommendation?  Anyone used this device and have real world experience to comment upon?  Thanks!

Great review. I'm a part-time operator, and have (4) DZR10's along with (4) DXS15-xlf subs. Great combo, and I don't think can be beat for the price, weight, cost, quality, and design. I previously had an SRX  rig (12"/18") and sold it in favor of the Yammies.

I also have (4) db technology ig4t's - which match well with the Yamaha subs, though if using all 4 ig4t's (stacked) they will definitely outrun the subs. I'd like to pick up a 3rd pair of subs for more SPL and to do 2:1 cardioid.

I haven't needed to yet - but if I used the ig4t's stacked (2/side) on a bigger outdoor gig, I think I'd lean towards renting some bigger subs either way. Danley TH118 (2 per side), or some high-power 2x18's (2 per side) - RCF 8006 etc.

also there is a setting called audio filter, I think, that will help large arena dropout.

And use the latest firmware in the packs and transceivers. Also, PEPP^� (Pete Erskine Pizza Pan) works; just put the transceivers as high up as possible. These tidbits are for the older E1 Freespeak II: The IP transceivers do not suffer nearly as much from multipath.

You could run it in daisy chain mode and have one cable for each, though either port would still work for both dante and/or control, there is no way to isolate the different networks to specific physical ports.

Darn.
So, the manual says "For a technical reference of the Ethernet Port, please refer to section 7.3. Additional information is available in the Lake Network Configuration Guide."

I have not been able to find this elusive "Network Configuration Guide". Anyone have a link?



N/M - I found it in the controller's Documentation folder. I concur that separating the networks isn't that easy. I could maybe leave it in redundant and use the primary for control (without connecting to the Dante network) and the secondary for Dante... I've never tested the theory though if a single device can be on secondary while the rest of the network is primary or it's all-or-nothing...

[size=78%]Does anyone know if it's possible to make one RJ45 on the Lake LM44 for Dante and other for control? I'd prefer to not have them on the same cable for simplicity.[/size]

You could run it in daisy chain mode and have one cable for each, though either port would still work for both dante and/or control, there is no way to isolate the different networks to specific physical ports.

Does anyone know if it's possible to make one RJ45 on the Lake LM44 for Dante and other for control? I'd prefer to not have them on the same cable for simplicity.