Another set of mt121 on the way

yes i will be i was going to cast the mould my self then make some from the mould. But a good friend of mine works for a fine mouldings company so he offered to cast for me and make a few from the cast, and all for a pint down the pub, nice one i think!.

deadbeat do i need any demo sounds to play through the speaker or does arta take care of this!!.

ARTA takes care of everything provided you have the very basic kit it requires! It's also nice to build a AP measuring box.

Copypasted:


The ARTA software consists of following programs:


<blockquote> ARTA - program for the impulse response measurement and for real-time spectrum analysis and frequency response measurements.

STEPS - program for frequency response measurements with stepped-sine excitation.

LIMP - program for the loudspeaker impedance measurement and loudspeaker parameters estimation.

</blockquote>


The ARTA program has functions of following measurement systems:


<blockquote> Impulse response measurement system with signal generators: periodic white noise, periodic pink noise, MLS, linear and logarithmic swept-sine.

Dual channel Fourier analyzer with signal generators: white noise, pink noise, periodic white noise and periodic pink noise.

Single channel Fourier analyzer with signal generators: periodic white noise and periodic pink noise.

Spectrum, octave band and THD analyzer with signal generators: sine, two sine, multitone, white noise, pink noise, periodic white noise and periodic pink noise.</blockquote>


The ARTA program is also a powerful analyzer of:


<blockquote> Gated frequency response,
Smoothed frequency response (in 1/n-octave bands),
Step response,

Impulse response envelope (ETC – curve),
Cumulative spectral decay waterfall
graphs and sonogram,
Burst decay waterfall graphs and sonogram,
Energy decay in reverberant environments,

Room acoustical parameters,

Directivity patterns,
Speech intelligibility measures: MTF, STI, RASTI, %AL.

Integrating Sound Pressure Level





</blockquote>


The STEPSprogram enables the measurement of the frequency responsewith a high dynamic range and a high noise
immunity. Simultaneously with a frequency response measurement the STEPS estimates levels of 2nd, 3rd,
4th, 5th and higher order harmonic distortions.


The LIMP program is specialized for the loudspeaker impedance measurement and for the estimation of
loudspeaker physical andThiele-Small parameters.</span>

Forgot to ask - what Comp and horn are you using?

thanks mate i will have a play and see what i can come up with.

ill try to match it to the 6" so ill look at plots first then decide from that.

Ok its been a very busy few months for me so the project ground to a holt!!! but hopefully it should be back on track over the next few weeks. smiley16

ok well its been a few weeks since my last post, my project has ground to a halt due to money, well lack of it!!. ive just had to replace some of my current kit, due to wear and tear. I may have to sell off the two cabs i have built!!! Im gonna try and sort other bits out first.

ok i sold the 2 mt's but have built another 2........ loaded one up today and had a play with it and with the 6" as well.

ive just sprayed the mt's with 2pack undercoat,











all that needs to be done is the black splatter coat....