AudioControl DM-RTA Review: Specifications, Uses and Comparisons
Quick summary: the buying decision
The DM-RTA is a battery-powered real-time analyser and multi-test tool for car, marine and home audio: an RTA, SPL meter, polarity checker, voltage meter and oscilloscope driven by the DM-RTA app on a Mac or PC, or on a phone or tablet with the optional AC-BT24. This listing is the analyser only, so you also need a measurement microphone.
AudioControl DM-RTA: what it is
The AudioControl DM-RTA is a battery-powered real-time analyser and multi-test tool for car, marine and home audio. It connects to a Mac or PC by USB, or to a phone or tablet by Bluetooth with the optional AC-BT24, and the DM-RTA app provides five measurement modules. This listing is the analyser only.
AudioControl sells the DM-RTA three ways at VA3 Car Studio: the analyser on its own, the DM-RTA Pro Kit (analyser, CM-30 microphone, cables and test leads in a hard case) and the DM-RTA Base Kit (hard case and accessories for an analyser you already own).
Key features
Five app modules: voltage meter, RTA (1/3, 1/6 and 1/12 octave), SPL meter, polarity checker and oscilloscope
Balanced and unbalanced line-level inputs and outputs, plus a speaker-level input rated up to 400 W
Microphone input with 48 V phantom power, variable gain and presets for AudioControl CM-20, CM-10 and C550H microphones
Coaxial and optical (Toslink) digital outputs plus USB; Option Port for the AC-BT24 Bluetooth module
Insert it into a signal chain to check the signal from source to speakers; about 5 hours of battery life
Specifications explained
Inputs: 1 x balanced (3.24 kohm), 1 x unbalanced (3.24 kohm), 1 x microphone (10 kohm), 1 x speaker-level (16.24 kohm). The low-level inputs accept up to 8 V RMS and the speaker-level input up to 40 V RMS.
Outputs: 1 x balanced and 1 x unbalanced (51 ohm), 1 x coaxial digital (75 ohm), 1 x optical (Toslink), 1 x USB. The signal generator outputs up to 5 V RMS / 7 V peak, battery life is about 5 hours, and the analyser measures 8 x 4.8 x 2.4 in and weighs 1.2 kg (2.6 lb).
Full specifications as published by AudioControl:
Model: DM-RTA
Type: Real-time analyser, oscilloscope and multi-test tool (analyser only)
Inputs: 1 x balanced (3.24 kohm), 1 x unbalanced (3.24 kohm), 1 x microphone (10 kohm), 1 x speaker-level (16.24 kohm)
Maximum low-level input: 8 V RMS
Maximum high-level input: 40 V RMS
Outputs: 1 x balanced and 1 x unbalanced (51 ohm), 1 x coaxial digital (75 ohm), 1 x optical (Toslink), 1 x USB
Signal generator maximum output: 5 V RMS / 7 V peak
Battery life: About 5 hours
Software: DM-RTA app (PC and Mac; iOS and Android with the AC-BT24)
Dimensions (W x D x H): 8 x 4.8 x 2.4 in
Weight: 1.2 kg (2.6 lb)
In the box: DM-RTA, USB cable, power supply, manual, warranty card
What you can measure
RTA: how much equalisation the car needs, measured acoustically with a microphone or electrically at line or speaker level
SPL meter: how loud the system plays, before and after an upgrade
Polarity checker: confirms every speaker is wired in phase
Oscilloscope: checks signals for clipping and amplitude when setting amplifier gains
Voltage meter and signal generator: test tones up to 5 V RMS for gain setting and fault-finding
Using it in a tuning session
Insert the analyser into the signal chain to check the signal from source to speakers: confirm the head unit or processor output is clean, set amplifier gains against the oscilloscope rather than by ear, check polarity, then measure the in-car response with a microphone at the listening position. The microphone input has 48 V phantom power, variable gain and presets for AudioControl's CM-20, CM-10 and C550H microphones.
Connection is by USB to a Mac or PC, or by Bluetooth to a phone or tablet with the optional AC-BT24 plugged into the Option Port.
How it compares
DM-RTA options and microphones at VA3 Car Studio:
AudioControl DM-RTA Pro Kit: real-time analyser and audio measurement kit, ₹1,78,490
AudioControl DM-RTA Base Kit: hard case and accessory kit for the DM-RTA, ₹63,740
AudioControl CM-20: measurement microphone (back-electret condenser), ₹18,690
AudioControl C550H: precision measurement microphone (capacitive pressure transducer, prepolarised backplate), ₹93,490
Price and value in India
At the time of writing (October 2026), VA3 Car Studio lists the DM-RTA at ₹1,44,490, 15% below the MRP of ₹1,69,990. For an installer or a serious enthusiast, measurement tools pay for themselves in tuning time and repeatable results. Prices can change, so the product page always shows the current price.
Verdict: who should shortlist the DM-RTA
The DM-RTA suits installers and serious enthusiasts who tune systems regularly; pair it with a CM-20 or C550H microphone.
Real-world reviews and limitations
We have not yet published a VA3 installation report for the DM-RTA. The figures in this review are AudioControl's published specifications, not our own measurements, and real-world results depend on how the measurements are taken and the tune. If you have used one, we would welcome your feedback.
Frequently asked questions
What does the DM-RTA measure?
RTA (1/3, 1/6 and 1/12 octave), SPL, speaker polarity and voltage, and it includes an oscilloscope and a signal generator.
Does the DM-RTA include a microphone?
No. This listing is the analyser only; add a CM-20 or C550H measurement microphone.
Can the DM-RTA connect to a phone?
Yes, by Bluetooth with the optional AC-BT24 module; otherwise it connects to a Mac or PC by USB.
How long does the DM-RTA battery last?
About 5 hours, according to AudioControl.
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