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<blockquote data-quote="keep_hope_alive" data-source="post: 7874729" data-attributes="member: 576029">good choice.I use TrueRTA constantly.&nbsp; I use a Behringer ECM8000 mic.&nbsp; The only other piece needed is a USB powered mic pre with 48V phantom power.&nbsp; i have two laptop RTA setups - one that uses an expensive SoundDevices USBpre, and another that uses a cheaper Rohls mic pre with an Audyssey PCIMA sound card.you do want the 1/24th octave unlock feature - that is very useful with identifying resonance issues.note when taking measurements:&nbsp; move the mic around, in a fig-8 pattern or similar so you even out the phase interference from reflections in the car.&nbsp; that way the measurement includes time and displacement and evens out the response to be more realistic of what the system is doing.i take full advantage of the 20 memory locations.&nbsp; i have a note pad with me, and i measure each driver separately, then combinations of drivers.&nbsp; i save each one to memory and note what each memory is.&nbsp; then i can go back and investigate.&nbsp; i even used TrueRTA to measure RCA outputs to verify crossover slopes on my HU - and was surprised at what i found!my build log includes screen shots.</blockquote>

[QUOTE="keep_hope_alive, post: 7874729, member: 576029"] good choice. I use TrueRTA constantly. I use a Behringer ECM8000 mic. The only other piece needed is a USB powered mic pre with 48V phantom power. i have two laptop RTA setups - one that uses an expensive SoundDevices USBpre, and another that uses a cheaper Rohls mic pre with an Audyssey PCIMA sound card. you do want the 1/24th octave unlock feature - that is very useful with identifying resonance issues. note when taking measurements: move the mic around, in a fig-8 pattern or similar so you even out the phase interference from reflections in the car. that way the measurement includes time and displacement and evens out the response to be more realistic of what the system is doing. i take full advantage of the 20 memory locations. i have a note pad with me, and i measure each driver separately, then combinations of drivers. i save each one to memory and note what each memory is. then i can go back and investigate. i even used TrueRTA to measure RCA outputs to verify crossover slopes on my HU - and was surprised at what i found! my build log includes screen shots. [/QUOTE]

Verification