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18SOUND 15MB1000

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18SOUND (Eighteen Sound) 15MB1000 — 15" / 15 inch · Midrange with Lower Midrange (ML) · Midrange · Ferrite
4" voice coil · 8 Ω
Part no.: 42A-CHS-MT-18S-0001

350.00 € 350.0 EUR 350.00 €

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  • Impedance (Ω)
  • Power handling (W)
  • Sensitivity (dB)
  • Frequency from (Hz)
  • Frequency to (Hz)
  • Diameter
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  • Mounting depth (mm)
  • Weight (kg)
  • Re (Ω)
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  • Fs (Hz)
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  • BL (Tm)
  • Mms (kg)
  • Sd (m²)

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18SOUND 15MB1000 — 15" · Midrange Driver

850 W AES · 98 dB Sensitivity · Frequency range 45 Hz – 5100 Hz

Technical data

  • Diameter: 15 "
  • Voice coil: 4 "
  • Power handling: 850 W AES
  • Sensitivity: 98 dB
  • Impedance: 8 Ω
  • Magnet: Ferrite
  • Weight: 11.4 kg
  • Mounting depth: 156 mm
  • Frequency range: 45 – 5100 Hz

Datasheet (PDF) · Manufacturer page

Series: MB · Part no.: 42A-CHS-MT-18S-0001

18Sound 15MB1000: 15" mid-woofer with 4" voice coil and 850 W AES

850 W AES from a 4" voice coil on a ferrite motor – the 15MB1000 from the MB series by 18Sound (Eighteen Sound) is the workhorse among 15" mid-woofers. Its operating range of 45 Hz to 5,100 Hz covers everything a two-way top with a 15" needs, and the 98 dB sensitivity is more than compensated by the power handling when maximum level is the goal.

The parameters fit together: Fs 48 Hz, Qts 0.31, Vas 132.5 l, BL 21 Tm and 6 mm Xmax on a moving mass of 85 g. This is no featherweight cone but a diaphragm that stays stable at high level. At 11.4 kg and a mounting depth of 156 mm, the driver belongs in cabinets that stand on the ground or on poles, not in flown lightweight systems.

Use and enclosure

The typical application is the two-way top with a 15" and a high-frequency horn. The bass reflex guideline suggests 69 l tuned to 58 Hz, with f3 around 64 Hz – a manageable volume for a 15" driver that, paired with subwoofers, reproduces kick and lower midrange with punch. The EBP of 150 favors vented over sealed as soon as extension matters. If you use the 15MB1000 purely as a midrange in a three-way cabinet, choose a sealed midrange chamber, for which the guideline gives about 32 l with a system resonance of 109 Hz. The enclosure calculator on 42.audio lets you fine-tune to the volume you want.

The upper limit of 5,100 Hz is high for a 15" driver and allows a relaxed crossover to the compression driver, sensibly well below that so the cone still radiates with little beaming in the transition region. Matching horns and drivers for 1.4" and 2" throats can be found in the 18Sound horns and waveguides category.

What to look out for

  • 8 Ω, Re 5.5 Ω: 850 W AES calls for a powerful amp, and the driver takes it thermally.
  • 11.4 kg and 156 mm mounting depth – plan the cabinet and handles accordingly.
  • 4" voice coil: high continuous load, but the crossover must respect 1.5 mH of inductance.
  • Xmax 6 mm: a high-pass below the 58 Hz tuning is mandatory.
  • Ferrite magnet: temperature-stable in long full-load operation, no loss of field strength when hot.

Frequently asked questions

Can the 15MB1000 also serve as a subwoofer driver?

Only to a limited extent. With Fs 48 Hz and f3 around 64 Hz in the reflex guideline, it is built for tops and lower mids, not deep bass. For subwoofers, drivers with more Xmax and a lower resonance are the better choice – for example from the 15" subwoofer selection at 42.audio.

What is the difference between the 15MB1000 and the 15MB700?

The 15MB700 with its 3" voice coil has lower power handling but higher sensitivity, and with Fs 42 Hz, Qts 0.29 and Vas 202 l a softer suspension. The 15MB1000 goes for maximum level with 850 W AES and 6 mm Xmax. Both are in the 42.audio shop.

How much amplifier power makes sense?

To use it fully, an amplifier in the region of 850 W into 8 Ω, with limiter and high-pass. For applications at moderate levels much less is enough, and then the 4" voice coil stays well away from its thermal limit anyway.

18Sound 15MB1000: manufacturer, spellings and classification

18Sound, 18 Sound and Eighteensound all refer to the same manufacturer: Eighteen Sound S.r.l. of Reggio Emilia, Italy. The 15MB1000 is a 15-inch midrange driver with ferrite magnet from the MB series, available from 42.audio, 18Sound dealer in Germany, with datasheet and full specifications in the driver database.

At 42.audio you get the 18SOUND 15MB1000 with datasheet PDF, all key data in the driver database and the enclosure calculator. More drivers from this manufacturer: Atlas 18Sound.

Thiele-Small parameters

Nominal impedance8 Ω
Resonance frequency fs48 Hz
Total Q Qts0.31
Electrical Q Qes0.32
Mechanical Q Qms6
Equivalent volume Vas132.5 l
Moving mass Mms85.0 g
Cone area Sd850 cm²
Linear excursion Xmax6 mm
Force factor BL21 Tm
DC resistance Re5.5 Ω
Voice coil inductance Le1.5 mH

Enclosure suggestion

The EBP of 150 suggests a bass-reflex enclosure. EBP = fs / Qes = 48 / 0.32

Sealed (Qtc 0.707)

Enclosure volume Vb
31.5 l
System resonance Fc
109 Hz
Cut-off frequency F3
109 Hz

Bass reflex (QB3 after Small)recommended

Enclosure volume Vb
55.6 l
Tuning frequency Fb
63 Hz
Cut-off frequency F3
70 Hz

Vb is the required net internal volume, Fb the tuning frequency of the reflex port and F3 the frequency at which the level has dropped by 3 dB. Calculated approximation after Small. A starting point for simulation, not a finished build plan.

Comparable drivers

Same size, same type, Qts within ±30 %.

Specifications

Allgemein
Manufacturer 18SOUND
Category Mid Frequency
Series MB
Magnet Ferrite
Impedance (Ω) 8
Power handling (W) 850
Sensitivity (dB) 98
Frequency from (Hz) 45
Frequency to (Hz) 5100
Abmessungen & Korb
Diameter 15
Voice coil (inch) 4
Mounting depth (mm) 156
Weight (kg) 11.4
Thiele-Small-Parameter
Re (Ω) 5.5
Le (mH) 1.5
Fs (Hz) 48
Qms 6
Qes 0.32
Qts 0.31
Vas (l) 132.5
Xmax (mm) 6
BL (Tm) 21
Mms (kg) 0.085
Sd (m²) 0.085