SPM 4 - Audio Amplifier AUDISON - Free user manual and instructions

Product Type	4-Channel Car Audio Amplifier
Brand	Audison
Model	SPM 4
Dimensions (W x H x L)	Approx. 200 x 50 x 350 mm
Weight	Approx. 2.5 kg
Power Supply	12V DC (Negative Ground)
RMS Power Output (4 Ohms)	4 x 50W
RMS Power Output (2 Ohms)	4 x 75W
Bridged Power (4 Ohms)	2 x 150W
Frequency Response	10 Hz - 40 kHz (±1 dB)
Total Harmonic Distortion (THD)	< 0.05%
Signal-to-Noise Ratio	> 100 dB
Input Sensitivity	0.2V - 8V
Crossover	Built-in high-pass/low-pass filters (variable)
Protection Circuits	Thermal, short circuit, overvoltage
Maintenance	Keep clean and dry; ensure proper ventilation
Safety	Install in secure location; disconnect battery before wiring
Spare Parts & Repairability	Contact authorized service center for replacements
General Information	High-efficiency Class AB design

Frequently Asked Questions - SPM 4 AUDISON

What is the recommended power cable gauge for the Audison SPM 4?

For optimal performance, use a minimum 8 AWG power and ground cable. Ensure the cable is fused within 18 inches of the battery.

Can the SPM 4 amplifier be bridged?

Yes, the amplifier can be bridged on channels 1/2 and 3/4 to deliver up to 150W RMS per bridged channel at 4 ohms.

What is the input sensitivity range?

The input sensitivity is adjustable from 0.2V to 8V, allowing compatibility with various head units.

How do I set the crossover filters?

Use the built-in variable high-pass and low-pass filters. Set the crossover frequency based on your speakers: high-pass for tweeters, low-pass for subwoofers.

What are the protection features?

The amplifier includes thermal, short circuit, and overvoltage protection to prevent damage.

Can I use this amplifier with a factory radio?

Yes, if the factory radio has preamp outputs. If not, you may need a line output converter (LOC).

What is the recommended speaker impedance?

The amplifier is stable down to 2 ohms per channel in stereo mode and 4 ohms when bridged.

How do I wire the remote turn-on?

Connect the remote input terminal to a 12V source from the head unit's remote output or a switched accessory wire.

What is the frequency response?

The frequency response is 10 Hz to 40 kHz within ±1 dB, suitable for full-range audio.

Does the amplifier require a specific mounting orientation?

Mount the amplifier in a well-ventilated area, ideally with fins oriented horizontally for best heat dissipation.

USER MANUAL SPM 4 AUDISON

ACCESSORIES ACCESSORIES

MANUALE D'USO / USER'S MANUAL MANUALE D'USO / USEP SMA (Stereo Passive Mixer 4Ch)

Descrizione

Stereo passive mixer (unpowered) featuring 4 input channels and 2 output channels, designed for active OEM multi-way systems where each speaker is powered by one specific amplified channel. SPM4 mixes audio through 4 audio transformers specifically developed to achieve very low distortion and highly linear acoustic response. SPM4 provides the ability to mix the midrange/woofer and tweeter channels coming from the amplifier and supply one single mid-high channel. The Ch1(L/R) channels feature two inputs, one features an inverting input compared to Ch2(L/R) channels; the mixing process often gives better results when one of the two channels undergoes a 180^irc dephasing. SPM4 is especially recommended to extend the number of inputs of the Audison digital processors or amplifiers with built-in DSP because they feature a De-equalizer (De-Eq). In that case, any possible non-linear acoustic emissions due to the mixing of the pre-existing filtered channels are duly compensated.

Technical Specifications

Max input power W (rms)		25
Max input power W (peak)		50
Output Gain dB		-3
T.H.D. (input power max)	% (100Hz)	0.5
	% (1kHz)	0.05
	% (10kHz)	0.05
Bandwidth Hz (-3dB)		15 ÷ 75k
Crosstalk dB (10kHz)		>55
Input impedance Ω		32
Out impedance kΩ		10
Phase inverter		Ch1 (left & right)
W x H x D	mm	103,5 x 36,5 x 86,5
	in.	4.07 x 1.43 x 3.40
Weight (kg / lb.)	kg	0,24
	lb.	0.53

SPM4 (Stereo Passive Mixer 4Ch)

Connessioni / Connections

graph TD
    A["LEFT MIX OUTPUT"] --> B["To AUDISON BIT PROCESSOR'S LO-LEVEL INPUTS"]
    C["RIGHT MIX OUTPUT"] --> B
    D["LEFT LO-PASS/BAND-PASS INPUT"] --> E["SPM4"]
    F["RIGHT HI-PASS INPUT"] --> E
    G["LEFT HI-PASS INPUT"] --> E
    H["RIGHT LO-PASS/BAND-PASS INPUT"] --> E
    I["INPUTS FROM OEM MULTICHANNEL AMPLIFIER"] --> E
    B --> E
    E --> J["Output"]
    style A fill:#cce5ff,stroke:#333
    style C fill:#cce5ff,stroke:#333
    style D fill:#cce5ff,stroke:#333
    style F fill:#cce5ff,stroke:#333
    style G fill:#cce5ff,stroke:#333
    style H fill:#cce5ff,stroke:#333
    style I fill:#cce5ff,stroke:#333