Infinity SM2 Underseat Subwoofer with Remote Control User Manual

June 3, 2024
Infinity

Infinity SM2 Underseat Subwoofer with Remote Control

Infinity-Basslink-SM2-Subwoofer-img

Specifications

  • WOOFER: 8″ (200mm)
  • AMPLIFIER POWER : 125W RMS
  • FREQUENCY RESPONSE: 35Hz – 120Hz
  • FUSE: 15A
  • MAXIMUM CURRENT DRAW : 12A
  • QUIESCENT CURRENT DRAW : <800mA
  • INPUT SENSITIVITY: 05V – 2V
  • LINE-LEVEL INPUT: 5V – 20V
  • HIGH-LEVEL INPUT CROSSOVER FREQUENCY: 50Hz – 120Hz
  • CROSSOVER SLOPE: 12dB/octave
  • BASS BOOST: 0dB to +9dB @ 70Hz
  • DIMENSIONS (L X W X H): 13-9/16″ x 9-7/8″ x 2-13/16″ (344mm x 250mm x 71mm)

Introduction

Many vehicles can accommodate the BassLink SM2 self-powered subwoofer beneath the front seat, which delivers powerful bass to any car audio system. Having a low profile, 8 “adding bass to vehicles with limited space is achievable thanks to a woofer and a carefully tuned low profile enclosure. You can tailor the BassLink SM2 to your system and vehicle using its fully adjustable crossover and bass EQ. To power the custom 8 “A powerful Class D digital amplifier that uses little power from your car’s charging system and keeps cool offers excellent sound.

Infinity-Basslink-SM2-Subwoofer \(1\)

THANK YOU

For choosing the Infinity Basslink SM2. Basslink SM2 has been designed to provide the kind of high-performance low-frequency reproduction that used to require big, clumsy enclosures, large amplifiers, and complex installation. To ensure maximum performance, we strongly recommend that installation be entrusted to a qualified professional

WARNING

Playing loud music in an automobile can permanently damage your hearing as well as hinder your ability to hear traffic. We recommend using low volume levels while driving. Harman International accepts no liability for hearing loss, bodily injury or property damage resulting from the use or misuse of this product.

INSTALLATION

Choosing a mounting location

Choose a location that doesn’t interfere with the loading or unloading of cargo, fold-down rear seats, or opening or closing of the trunk lid. The best location is likely to be the front or rear corner of the trunk or luggage compartment. These locations, in addition to being out of the way, will provide the best sonic reproduction in the 60Hz – 1 00Hz range because the output of the woofer will be “corner loaded” against the walls of the vehicle. In any case, the Basslink SM 2 must not interfere with the safe operation of the vehicle.

CAUTION: Make sure mounting screws will not puncture wiring harnesses, brake or fuel lines, or the vehicle’s fuel tank. Some or all of these may be located behind or under the mounting surface.

Mounting Basslink SM2

IMPORTANT: Disconnect the vehicle’s negative (-) battery terminal before beginning the installation.

CONNECTIONS

Power Connections

Infinity-Basslink-SM2-Subwoofer \(3\)

NOTE: If you are using only the Basslink SM2’s line-level (RCA) inputs, you must connect the remote wire from the Basslink SM2 to the system’s head unit so Basslink SM 2 will turn on and off with the system. If you will be using the speaker-level outputs from your head unit, you do not need to connect the remote output. The Basslink SM2’s speaker-level inputs will sense voltage on the speaker wires and the Basslink SM2 will turn itself on. (See Audio Sense Switch, below.)

Input Connections

Connect the subwoofer output from the source unit to either the left or right line-level input. If your source unit does not have a dedicated subwoofer output you can connect the rear left/right outputs to the Basslink SM2’s left and right inputs.

If your source unit doesn’t have line-level outputs you can use the included speaker-level input harness to connect the Bass link SM 2 to the source unit’s speaker outputs. See the illustration for the wiring configuration.

TUNING Basslink SM2

Bass link SM 2 provides several controls that simplify sonic integration with virtually any vehicle’s unique acoustic properties. Please read the following section carefully to familiarize yourself with the function of each control.

  • Phase Switch: This switch will reverse the phase of Basslink SM2’s output with respect to its input. When installing Basslink SM 2 with an existing factory or aftermarket system, depending on Basslink SM2’s location in the vehicle and the distance between it and the other speakers in the car, changing the setting of the phase switch may produce a discernable increase or decrease in the amount of upper bass reproduced. Although the position that yields the most upper bass is technically correct, you may choose the position that best suits your taste.
  • Level Control: This control will adjust the input sensitivity of Basslink SM2. Use this control to adjust the relative volume (loudness) of Basslink SM 2 with respect to the other speakers in the vehicle.
  • Crossover Control: The crossover control adjusts the amount of upper bass and Midbass information present in Basslink SM2’s output. After listening to music on the system for a time, fine-tune the Crossover control setting to achieve a smooth transition from the Basslink SM2 to the rest of the system’s speakers while avoiding a “hole,” where the sounds that occur between the Basslink SM 2 and other speakers seem to drop out.
  • Bass Boost Control: Basslink SM2’s interaction with the acoustics of your vehicle may produce a peak or dip in Basslink SM2’s response. For the vast majority of vehicles, these peaks or dips occur at about 40Hz – around the frequency of the lowest bass guitar note. Use the Bass Boost control to correct that peak or dip. Adjustment between 0dB and +9dB is possible. Although response without any sharp peaks or dips is technically correct, you may choose the position that best suits your taste.
  • Audio Sense Switch: If you have used the High-Level inputs to connect the Basslink SM2 to your system’s radio/head unit (see Input Connections, above), set the Audio Sense switch in the “On” position. This will allow the Basslink SM2 to sense voltage on the speaker inputs and turn itself on when the rest of the audio system turns on.
  • Input Load Switch: This switch has an effect only when you have used the High-Level inputs to connect the Basslink SM 2 to your system’s radio/head unit. For the lowest noise in most applications, set the Input Load switch in the “High” position. In some cases, (such as when using the radio’s power fader), the “Low” position may produce better results.
  • Remote Connection: This connector is compatible with the RBC remote volume control.

Adjustment sequence

  1. Start with Level control set to minimum, the Phase switch set to “0” and the Crossover and Bass Boost controls rotated to the 3 o’clock position.
  2. Choose program material with substantial bass content and turn the volume control on your head unit to three-quarters of its total output (approximately 3 o’clock on rotary controls).
  3. Adjust the gain control clockwise until the Basslink SM2’s volume sounds balanced with the rest of the system.
  4. Continue listening, making a mental note of the amount of upper bass present in your system.
  5. Switch the Phase switch to “180” and recheck for upper bass content. There may be more upper bass, less upper bass, or there may be no change. The position that provides the most upper bass is correct, but you may choose either setting according to your taste.
  6. Adjust the Crossover control clockwise or counterclockwise until the perceived output from Basslink SM2, as heard at the listening position, contains only low-frequency information; i.e., you should NOT hear any vocals coming from Basslink SM2 when you are seated in the normal listening position.
  7. Adjust the Bass Boost control clockwise or counterclockwise to suit your taste.

Note: Although this adjustment sequence will in most cases provide satisfactory tuning, the actual process may include several readjustments of each of the controls since their settings will interact with each other. If necessary, consult your authorized Infinity car audio dealer for help in tuning your system.

FREQUENTLY ASKED QUESTIONS

What gauge size is suggested for this?****

The suggested amp wire gauge for the Infinity Basslink SM2 is 10.

Does this fit underneath the seat of a 2008 Toyota Avalon?****

The size of our Infinity Basslink SM2 is 13-9/16 “W x 2-7/8″H x 10-1/16″D. It is best to measure the space you have available versus the dimension of the unit to correctly decide if it fits into your automobile.

How many RMS watts?****

The amplifier power of our Infinity Basslink SM2 is 125W RMS.

Which harness is required?****

With the Infinity Basslink SM2, you get a 7.5″ “connector harness for speaker level input to the source.

Are underseat subs any good?****

Low-frequency bass is a distinctive sound that underseat subwoofers make. Kick drums and bass guitars produce this frequency.

What is an underseat subwoofer?****

A speaker made specifically to reproduce low-frequency bass frequencies is known as an underseat subwoofer.

What size subwoofer is best for music?****

Jazz or classical music, which tends to be more acoustic, sound great on an 8′′ sub. You will respond quickly and precisely to the frequencies contained in this sort of music thanks to the smaller, more agile cone.

Where should underseat subwoofer be placed?****

Either in the rear region of a hatchback, behind the rear bench in trucks, behind the driver’s or passenger’s seat, or even in the trunk.

Should Subs be louder than bass?****

If you want to have enough headroom for the rest of the song, sub bass should peak at -12 dB. Keep the sub bass 2 to 5 dB below the kick drum as a general rule of thumb if mixing with headroom isn’t working for you.

How loud is too loud for a subwoofer?****

With subwoofer, 120 dB is LOUD. The following day, 130db in the 30–40 Hz range can harm your ears. The midrange is very uncomfortable at 120dB. Although 90-95 dB is acceptable, I prefer my transients to be in the 110 db+ area.

What wattage subwoofer is best?****

It is advised that you choose a subwoofer with at least 100 watts RMS of power in order to achieve a respectable amount of power. This will guarantee that your speakers are audibly and clearly audible, but it can also be enhanced by employing an amplifier.

Can you put subwoofers under a seat?****

The ideal subwoofer size is roughly 8 inches, which is less than the single, huge subwoofer in the trunk, but you will get a far better result if you put two of them under the seats that fire upwards.

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