Signum SXT8D2 - Subwoofer ESX - Free user manual and instructions

Product Type	Subwoofer
Brand	ESX
Model	Signum SXT8D2
Basket Size	20 cm (8")
Outer Diameter	210 mm
Installation Opening	182 mm
Installation Depth	123 mm
Voice Coil	Dual 50.8 mm diameter, 27.1 mm height
Magnet Weight	2 x 24 oz (1.3 kg)
Impedance	2 + 2 Ω (Dual Voice Coil)
Frequency Range	30 - 300 Hz
Power Handling (RMS)	250 Watts
Power Handling (MAX)	500 Watts
Recommended Amplifier Power	200 - 300 Watts RMS
Sensitivity (SPL)	86 dB (2.83V/1m)
Xmax (Maximum Excursion)	±19 mm
Cone Area (Sd)	227 cm²
Moving Mass (Mms)	83.2 g
DC Resistance (Re)	2 x 2 Ω
Resonance Frequency (Fs)	34 Hz
Total Q (Qts)	0.56
Equivalent Volume (Vas)	19 L
Recommended Sealed Enclosure Volume	10 - 20 L
Recommended Ported Enclosure Volume	20 L
Ported Tuning Frequency (Fb)	42 Hz

Frequently Asked Questions - Signum SXT8D2 ESX

What is the impedance of the Signum SXT8D2 subwoofer?

The Signum SXT8D2 has a dual voice coil with an impedance of 2 + 2 Ω. You can wire it in series for 4 Ω or parallel for 1 Ω.

What is the recommended amplifier power for this subwoofer?

The recommended amplifier power is 200 - 300 Watts RMS. To avoid distortion, the amplifier should have about 20-30% more power than the subwoofer's RMS rating.

What is the maximum excursion (Xmax) of the subwoofer?

The maximum linear excursion is ±19 mm, allowing high output levels with low distortion.

What type of enclosure is recommended for the SXT8D2?

For compact bass, use a sealed enclosure of 10-20 L. For deeper bass, a ported enclosure of 20 L tuned to 42 Hz is recommended.

How do I properly install the subwoofer in my vehicle?

Choose a location that does not obstruct driver vision or safety systems (airbags, seat belts). Securely bolt the subwoofer to prevent movement. Keep cables short and protect the device from moisture and dust.

Can I use this subwoofer with a mono amplifier?

Yes, the dual voice coil allows flexible wiring. For a mono amp, wire the coils in parallel to present a 1 Ω load or in series for 4 Ω, depending on the amplifier's stability.

What is the frequency response of the Signum SXT8D2?

The usable frequency range is 30 - 300 Hz, making it ideal for dedicated sub-bass and low mid-bass.

How should I dispose of this product?

Do not dispose of electronic devices in household waste. Take the subwoofer to a suitable recycling facility according to local regulations.

Why is it important to use an amplifier with more power than the subwoofer's RMS rating?

An amplifier with 20-30% more power than the subwoofer's RMS rating helps avoid clipping, which can damage the voice coil. Clean power at higher levels is safer.

What are the Thiele-Small parameters used for?

Thiele-Small parameters help design the optimal enclosure. Key values include Fs=34 Hz (free-air resonance), Qts=0.56 (total Q factor), and Vas=19 L (equivalent volume).

USER MANUAL Signum SXT8D2 ESX

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SIGNUM

SXT8D2 20 CM (8") SUBWOOFER

VERS.1.0

ACHTUNG

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SPEZIFIKATIONEN

Playing very loud music in a vehicle can permanently damage your hearing and impair your ability to perceive traffic. It is therefore advisable to avoid using permanently high volumes while driving. We assume no liability for hearing loss, bodily injury, or property damage resulting from the use or misuse of this product.

DISPOSAL/RECYCLING

If you have to dispose the subwoofer, please note that no electronic devices must be disposed in the household waste. Dispose the subwoofer at a suitable recycling facility in accordance with local waste regulations. If necessary, consult your local authority or dealer.

More information at www.audiodesign.de/english/disposal

IMPORTANT NOTES PRIOR TO INSTALLATION

• For the installation, choose a position in the vehicle that does not impair the driver's field of vision or the safety of the passengers. This is particularly true for airbag zones and seat belts.
• Make sure that the subwoofer cannot come loose while driving and is screwed tightly.
• When installing and fastening the device, make sure that no components of the vehicle (airbags, seat belts, cable harnesses, fuel tank, etc.) are damaged.
• All cables should be kept as short as possible to avoid losses and interference.
• Protect the device from moisture, dust and dirt.
• The performance and reliability of the sound system depends on the quality of the installation. It is best to have the installation carried out by an installation specialist.

SPECIFICATIONS

Basket size 20 cm (8")
Outer diameter ∅ 210 mm
Installation opening ∅ 182 mm
Installation depth 123 mm
Dual voice coil ∅ 50,8 mm, ‡ 27,1 mm
Dual magnet Y25, 2 x 24 oz. (1,3 kg)
Impedance 2 + 2 Ω
Frequency range 30 - 300 Hz
Power handlingNominal power handling ^1 Music power handling ^2	250 Watts/RMS500 Watts/MAX.
Recommended amplifier power ^3	200 - 300 Watts/RMS

^1 The nominal power handling is given in watts RMS and represents an effective value. This corresponds to the average power value of the subwoofer in the corresponding frequency range. The value is determined in a complex measuring process using pink noise. RMS is the abbreviation for “Root Mean Square”.
^2 The music power handling represents a benchmark that reflects the performance when playing music continuously with loud and quiet passages and pauses. This takes into account that the subwoofer can always “recover” and cool down thermally due to the dynamic music playback.
^3 The recommended amplifier power depends on the actual output power of the amplifier, which also depends on the connected on-board voltage. In principle, an amplifier should always have around 20-30% more power than the nominal power handling of the speaker specified in RMS in order to avoid distortion or clipping in the audio signal, otherwise the speaker's voice coil could be damaged.

THIELE-SMALL PARAMETERS

Xmax maximum excursion ± 19 mm
SPL 2,83 V/1m 86ws dB
SD 227 cm	2
Mms 83,2 g
Re 2 x 2 Ω
Fs 34 Hz
Qms 7,90
Qes 0,60
QTS 0,56
VAS 19 L

The Thiele-Small parameters stated above were determined in the measurement laboratory. Depending on the performance and application, the values can vary by approximately ±10% in practice.

RECOMMENDED ENCLOSURE APPLICATIONS

Sealed enclosure Compact
Volume Vb 10 - 20 L
Cutoff frequency F3 42 Hz
Ported / bassreflex enclosure Deep bass
Volume Vb 20 L
Frequency – 3dB F3 34 Hz
Tuning frequency Fb 42 Hz
Port diameter ∅ 8 cm
Port area 50 cm	2
Port length 35 cm

WIRING DIAGRAM

CAUTION

Ensure the correct polarity of all connections.

Audio Design GmbH

Am Breilingsweg 3 · D-76709 Kronau/Germany

Tel. +49 7253 - 9465-0 · Fax +49 7253 - 946510

www.audiodesign.de • www.esxaudio.de

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