Multimeter for T/S parameter

[Buzzy]

I would like to test the T/S parameter with speaker workshop. I have read guides regarding this and found http://www.claudionegro.com/

However i don't have a multimeter.

May i know what i should look for when buying a multimeter for measuring the t/s parameters ? I don't wanna spend too much money on a multimeter as its not worth spending over $100 on a meter to test a $50 woofer. Thankz

[Buzzy]

Is this the wrong thread to post this ?

[pinkmouse]

Nope, you just need to give people time to answer.

Any meter that measures true RMS would be perfect, but to be honest, you can use just about anything. I've achieved reasonable results with a £5 el cheapo special. Much more important is an accurate signal generator.

[Buzzy]

pinkmouse to what accuracy must the meter measure ? I got confused by the measuring range and accuracy. In this link http://www.sanwa-meter.co.jp/oversea...x360trf_e.html
I see some ranges and stuff what should i look for when buying the meter for my purpose ?

[AndrewT]

depends on Fs of your driver.

If Fs is very low then your meter may waver (or worse) trying to read voltage on very low frequency signals.

Similarly, reading the test frequency becomes difficult when trying to go below about 25Hz. FL can be significantly below Fs. FH is a bit easier to measure since it is above Fs.

None of my handheld DMMs can work with Fs~=22Hz.

[Buzzy]

I need to measure Fs of a subwoofer driver too which i expect it to be arnd 20Hz. So its impossible to do that ?

[AndrewT]

certainly not impossible.
But, ask the retailer how well it measures low frequency voltages. Specifically in the range 10 to 15Hz, 15Hz to 20Hz and 20Hz to 30Hz.
If it can't do that then you're wasting your money buying the instrument for Bass driver testing.
My Bench meter does it beautifully. £50 secondhand from Ebay.

[Buzzy]

Its kinda confusing. I don't know how voltage is related to frequency. I went to a store to check out the meter just now and it does not state anything abt the frequency.

[Buzzy]

I shld be looking for something that measures mVac and resistance right ? What other impt features other than the freq shld i be looking for ?

[ocool_15]

I bought a mastech MS8202A a while ago for $16 american + shipping.
at 2.81V
From 10Hz -1500hz it measured
1.7% high to -1.4% low( at 10Hz)
when compared to a Fluke 867 I had access to.
I checked Ebay and I couldn't find one right now but Electronnix was his username. The numbers would fluctuate a bit below 20Hz though. You may have difficulty with your amp/source being flat well below 20hz also.