Two black Karma Mobile Audio Inspire 3 inch speakers shown on a white background, one displaying the front honeycomb grille and the other showing the side profile with a mounting bracket and the logo.
SPL vs Frequency graph with multiple lines labeled for different angles, branded 'Karma Mobile Audio'.
Technical drawing of a speaker with dimensions and specifications
Karma Mobile Audio Inspire 3 | 3" Wideband - Karma Wideband for car audio systems
Two black Karma Mobile Audio Inspire 3 inch speakers shown on a white background, one displaying the front honeycomb grille and the other showing the side profile with a mounting bracket and the logo.
SPL vs Frequency graph with multiple lines labeled for different angles, branded 'Karma Mobile Audio'.
Technical drawing of a speaker with dimensions and specifications
Karma Mobile Audio Inspire 3 | 3" Wideband - Karma Wideband for car audio systems

Karma

Karma Mobile Audio Inspire 3 | 3" Wideband

SKU: Inspire 3

$ 500.00
QUICK SPECS
  • Type: 3" wideband driver
  • Power: 125W at 250Hz, 24 dB/oct
  • Top End: 20 kHz on-axis
  • Impedance: 4 ohms
Two black Karma Mobile Audio Inspire 3 inch speakers shown on a white background, one displaying the front honeycomb grille and the other showing the side profile with a mounting bracket and the logo.

Karma Mobile Audio Inspire 3 | 3" Wideband

Regular price $ 500.00
Sale price $ 500.00 Regular price
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INSTALLER'S TAKE

I have spent years competing and judging on the sound quality circuit, and the Inspire 3 is the most capable wideband Karma makes. A wideband lets one driver carry the midrange and the highs with no crossover in the most sensitive part of the music, and the 3 inch does it with far more output and reach than the smaller 2.

The number that defines this driver is 5mm of excursion. That is more than double the Inspire 2, and it changes how you use it. Where the 2 has to stay above 300 Hz, the 3 has the travel to be crossed down to 150 or 200 Hz, so it takes over more of the midrange and overlaps a midbass cleanly. That long throw is also why it plays louder and lower. I run it at 150 to 200 Hz on a 24 dB slope and let it do real work. Behind a 250 Hz crossover it is good for 125 watts of clean power, but here is what matters most: that number assumes clean power. A small wideband does not die from watts, it dies from a clipping, distorted amplifier. Feed it a clean amp with headroom and correct gains and it plays for years on the 10 to 20 watts it actually needs to get loud.

Now the part people get wrong from the spec sheet. The 3 is rated to 10 kHz, but that is the conservative all-angles number. Look at the response: on-axis and out to about 30 degrees it plays the full top octave to 20 kHz. It is only at steep off-axis angles that the very top rolls off, because a 3 inch cone starts to beam up there. That is exactly why this driver wants to be aimed at the listener. Aim it at the seats and you get all the air with no tweeter. Bury it flat in a dash firing across the car and you give some of the top away to the far seat, which is the one case where I would add a small super-tweeter.

My honest take: this is the flagship, and it sounds like it. If you can aim it on-axis and you want the most output, the lowest reach, and the most flexible crossover from a single coherent driver, the Inspire 3 is the top of the Karma line. If you are stuck in a flat factory dash location firing across the car, or you want the widest off-axis top end, the Inspire 2 is the smarter pick.

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Product Details

Karma Mobile Audio Inspire 3

Inspire Series 3" Wideband | Sold as a Pair

3" Wideband 5mm Xmax Copper Shorting Ring Neodymium Motor Crosses From 150Hz 20kHz On-Axis

The Most Capable Wideband Karma Makes

The Karma Mobile Audio Inspire 3 is a 3 inch wideband driver and the top of the entire Karma lineup, sitting above the Allure series in refinement and performance. It is designed by speaker engineer Dr. Rishi S. Gurbani and sold as a pair.

A wideband covers the midrange and the highs from a single cone, with no tweeter to blend. The Inspire 3 is the big-cone version: with 5mm of excursion and a 100 Hz resonance, it plays louder and reaches lower than the Inspire 2, and aimed at the listener it plays the full top octave to 20 kHz.

Built to Perform

The Inspire 3 pairs a serious motor with a long-throw suspension to deliver clean, dynamic sound with real output and very low distortion.

5mm of Excursion

More than double the travel of the Inspire 2. That long throw is why the 3 plays lower and louder, and why it can be crossed down toward 150 Hz to overlap a midbass.

Copper Shorting Ring

An integrated copper shorting ring cuts inductance and distortion, keeping the midrange and treble clean as the driver works harder.

Neodymium Motor

A powerful neodymium motor in a rigid cast aluminum basket gives strong magnetic control and precise cone movement, even in compact spaces.

Coated Paper Cone

A coated paper cone with a magnesium dustcap and a one-piece butyl surround gives excellent damping and a natural, easy tonality.

How to Run It

The Inspire 3 is the flexible wideband. Its long excursion lets you cross it lower than most drivers its size, so it can take over more of the midrange and lean less on the midbass.

High-pass the Inspire 3 at 150 to 200 Hz on a 24 dB-per-octave slope. With 5mm of excursion it has the travel to play that low cleanly, unlike the smaller Inspire 2, which has to stay above 300 Hz. Behind a 250 Hz high-pass it handles 125 watts of clean power. On-axis it plays the full top octave to 20 kHz, so aimed at the listener it needs no tweeter at all. The manufacturer rates it to 10 kHz because that is where output holds at every angle including 60 degrees off-axis; the top octave simply narrows as you move off-axis, which is why this driver rewards on-axis aiming.

This power rating assumes clean, low-distortion power. A clipping or distorted amplifier sends DC-like energy and harmonics straight into the voice coil that this driver was never rated to take, and a small wideband will fail almost instantly. Distortion, not wattage, is what kills these drivers. Do not run a small, cheap, or underpowered amplifier into clipping. Invest in a clean amplifier with honest power and headroom to spare, set the gains correctly, and this driver will outlast your car. In normal use a wideband only draws 10 to 20 watts to play loud.

Run it as the wideband in a tweeterless front stage: high-pass it at 150 to 200 Hz to a midbass such as the Karma Mobile Audio Allure 6 Midbass or Aspect 6.9, and add a subwoofer for the low end. Feed it a clean 10 to 20 watts. Because it carries so much of the range itself, it keeps the system simple and coherent.

Fitment and Integration

The Inspire 3 is ideal for OEM 3 inch dash or A-pillar wideband locations and for custom pods where you can aim it at the listening position. Free-air is preferred, so it does not need a sealed box.

Flange: 91mm. Cutout: 73mm. Bolt circle: 83mm, six holes. Mounting depth: 45mm below the flange, 51.1mm overall. Confirm against your location using the mounting drawing before install.

See the full Karma lineup

On-Axis Front Stage

Aimed at the listener from an A-pillar or dash pod, the Inspire 3 throws a wide, dynamic stage with serious output and full top-end extension.

Factory 3" Wideband Location

A direct upgrade for vehicles that use an OEM 3 inch dash or center wideband and have no factory tweeter.

On-Axis Means Full Range

Aimed at the listener, the Inspire 3 plays to 20 kHz with no tweeter. Only a steep off-axis factory location would soften the very top, where a small super-tweeter can help.

Inspire 3 or Inspire 2?

Choose the Inspire 3 for more output, lower reach, and on-axis aiming. Choose the Karma Mobile Audio Inspire 2 for tight factory spots and the widest off-axis top end.

The Top of the Karma Lineup

Every Karma Mobile Audio Inspire 3 from Audio Intensity is backed by warranty and setup help from a working SQ judge.

Tell us your vehicle, your midbass, and where you can mount the driver and we will map out the crossover, placement, and tune. Built on sound quality first.

Specifications
Specifications
Driver Type3" wideband, sold as a matched pair
Cone / SurroundCoated paper, one-piece butyl rubber surround
DustcapMagnesium
Voice Coil20.4mm, pure copper, titanium former
MotorNeodymium with copper shorting ring, 55mm x 3mm magnet
BasketCast aluminum
Nominal Impedance4 ohms (3.5 ohm DCR)
Sensitivity85.5 dB (1W/1m)
Power Handling (usable)125W with a 250 Hz high-pass (24 dB/oct, excursion-limited)
Real-World Power DrawA wideband only needs 10 to 20W to play loud; clean power matters more than wattage
Recommended High-Pass150 to 200 Hz, 24 dB/oct (5mm Xmax allows a low crossover)
Top-End ExtensionTo 20 kHz on-axis; top octave narrows past about 30 to 45 degrees off-axis (sheet rates 10 kHz across all angles)
EnclosureFree-air preferred, also works in a small sealed enclosure
GrillePreinstalled
SeriesInspire, Karma flagship (sits above Allure)
Flange Diameter91mm
Cutout / Bolt Circle73mm cutout, 83mm bolt circle (6 holes)
Mounting Depth45mm below flange (51.1mm overall)
Net Weight (each)388 g
Electrical & T/S Parameters
Resonant Frequency (Fs)100 Hz
DC Resistance (Re)3.5 ohm
Voice Coil Inductance (Le)0.38 mH @ 1kHz
Mechanical Q (Qms)4.4
Electrical Q (Qes)0.45
Total Q (Qts)0.41
Equivalent Compliance (Vas)1.0 L
Moving Mass (Mms)2.99 g
Suspension Compliance (Cms)0.85 mm/N
Force Factor (Bl)3.88 Tm
Effective Piston Area (Sd)29.3 sq.cm
Effective Diameter6.1 cm
Linear Excursion (Xmax)5mm one-way (10mm P-P)
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