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BEYMA 8WRS300

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BEYMA 8WRS300 — 8" / 8 inch · Woofer · Bass
300 W AES - 95 dB - 65 – 4000 Hz - 8 Ω
Part no.: 42A-CHS-TT-BEY-0039

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BEYMA 8WRS300 — 8" · Woofer

300 W AES · 95 dB Sensitivity · Frequency range 65 Hz – 4000 Hz

Technical data

  • Diameter: 8 "
  • Voice coil: 2 "
  • Power handling: 300 W AES
  • Sensitivity: 95 dB
  • Impedance: 8 Ω
  • Weight: 3.25 kg
  • Mounting depth: 95 mm
  • Frequency range: 65 – 4000 Hz

Series: WRS · Part no.: 42A-CHS-TT-BEY-0039

Beyma 8WRS300: 8" mid-woofer with 95 dB and 300 W AES for compact vented boxes

The Beyma 8WRS300 is an 8" woofer from the WRS series with a 2" voice coil, 300 W AES power handling and 95 dB sensitivity at 8 Ω. Its rated band runs from 65 to 4000 Hz, which puts it squarely in mid-woofer territory for small two-way cabinets: it carries the bass and lower midrange and hands over to a tweeter only in the presence region. At 3.25 kg and 95 mm mounting depth it stays light and shallow enough for satellites, compact monitors and column speakers.

The Thiele-Small parameters describe a tightly controlled driver: Qts 0.28 at an Fs of 65 Hz, a motor delivering 15.2 Tm on just 28 g of moving mass, and a Vas of 15 l. Dividing Fs by Qes gives an EBP of 217, so this is clearly a vented-box or horn-loading candidate rather than a sealed-box design with real low-end extension. With 6 mm Xmax and 132 cm³ of displacement there is still enough travel for a small reflex box at level.

Use and enclosure

As a guideline derived from the parameters, a vented enclosure of roughly 5.8 l tuned to 86 Hz gives a lower cut-off around 100 Hz. That is the classic satellite or monitor layout with a subwoofer taking over below. Sealed, the numbers come out at about 2.8 l with a system resonance of 164 Hz, which makes sense as a midrange chamber in a three-way design where the 8WRS300 only covers the lower-mid and midrange band. The enclosure calculator at 42.audio gives you the exact alignment.

In a two-way box it pairs naturally with a 1" compression driver on a horn from Beyma's horns and waveguides category; place the crossover well below the 4000 Hz upper limit so the beaming of the 8" cone stays out of the overlap region. With a DC resistance of 6 Ω the driver is an easy 8 Ω load for any PA amplifier.

What to look out for

  • 8 Ω nominal, Re 6 Ω: easy load, two drivers in parallel are fine on a 4 Ω capable amplifier.
  • 95 mm mounting depth and 3.25 kg: fits shallow satellites and columns.
  • 2" voice coil handles the 300 W AES thermally, the 0.9 mH Le stays moderate.
  • Xmax 6 mm, Vd 132 cm³: plan for excursion headroom in small vented boxes.
  • EBP 217: vented or horn loading, not a sealed deep-bass design.

Frequently asked questions

How does the 8WRS300 differ from the Beyma 8WR300?

The two share almost identical parameters: Fs 65 Hz, Vas 15 l and a Qts of 0.28 for the 8WRS300 versus 0.27 for the 8WR300. You can plan enclosure and crossover the same way for both; the differences are in the construction details, which you can compare on the respective product pages at 42.audio.

Can I use the 8WRS300 as the only bass driver in a full-range box?

Only with compromises in the low bass. The vented guideline is 5.8 l with a cut-off around 100 Hz, and with a Qts of 0.28 not much happens below that. For real low end, add a subwoofer and cross the 8WRS300 above it.

Which amplifier suits 300 W AES at 8 Ω?

An amplifier delivering around the AES rating into 8 Ω is more than enough given the 95 dB sensitivity; in a small box the driver will be limited mechanically before it is limited thermally. A high-pass filter below the tuning frequency protects against over-excursion on deep transients.

Beyma 8WRS300: manufacturer, spellings and classification

Beyma and Acustica Beyma refer to the same manufacturer: Acústica Beyma S.L. of Moncada near Valencia, Spain. The 8WRS300 is a 8-inch woofer from the WRS series, available from 42.audio, Beyma dealer in Germany, with datasheet and full specifications in the driver database.

At 42.audio you get the BEYMA 8WRS300 with all key data in the driver database and the enclosure calculator. More drivers from this manufacturer: Atlas Beyma.

Thiele-Small parameters

Nominal impedance8 Ω
Resonance frequency fs65 Hz
Total Q Qts0.28
Electrical Q Qes0.3
Mechanical Q Qms5.4
Equivalent volume Vas15.0 l
Moving mass Mms28.0 g
Cone area Sd220 cm²
Linear excursion Xmax6 mm
Displaced volume Vd132 cm³
Force factor BL15.2 Tm
DC resistance Re6 Ω
Voice coil inductance Le0.9 mH

Enclosure suggestion

The EBP of 217 suggests a bass-reflex enclosure. EBP = fs / Qes = 65 / 0.3

Sealed (Qtc 0.707)

Enclosure volume Vb
2.8 l
System resonance Fc
164 Hz
Cut-off frequency F3
164 Hz

Bass reflex (QB3 after Small)recommended

Enclosure volume Vb
4.5 l
Tuning frequency Fb
94 Hz
Cut-off frequency F3
110 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 BEYMA
Category Low Frequency
Series WRS
Impedance (Ω) 8
Power handling (W) 300
Sensitivity (dB) 95
Frequency from (Hz) 65
Frequency to (Hz) 4000
Abmessungen & Korb
Diameter 8
Voice coil (inch) 2
Mounting depth (mm) 95
Weight (kg) 3.25
Thiele-Small-Parameter
Re (Ω) 6
Le (mH) 0.9
Fs (Hz) 65
Qms 5.4
Qes 0.3
Qts 0.28
Vas (l) 15
Xmax (mm) 6
Vd (cm³) 132
BL (Tm) 15.2
Mms (kg) 0.028
Sd (m²) 0.022