Stereo Integrity TM8 – 8″ Midbass Speaker (Pair) 150W RMS

Stereo Integrity TM8 – 8″ Midbass Speaker (Pair)

Welcome to the TM8 loudspeaker. A completely new low distortion driver designed in Finite Element Analysis here in North Carolina. Our TM8 uses our custom tooled cast aluminum basket with an integrated rain shield and a very shallow mounting depth of only 2.3″.

Twin shorting rings lower and linearize inductance for an Xmax:Le ratio only found in significantly higher priced loudspeakers. With good sensitivity and 7 mm of Xmax the TM8 effortlessly provides pant-leg-slapping midbass.

Power handling and linear inductance characteristics are accomplished by its 50 mm voice coil with solid copper windings mated to the pure aluminum cone body. The pure aluminum cone body was carefully designed with the best strength-to-weight ratio to allow for proper frequency extension and strength for midbass / deep bass extension. Perhaps most importantly is the combination of the copper voice coil, CZA former, and aluminum cone also offer tremendous thermal advantages as they all work in tandem to extract and disperse heat from the voice coil which increases thermal power handling.

We designed our TM8 with a higher-than-average Qts. The main install location for our TM8’s is in a vehicle door. A vehicle door is a very lossy enclosure that closely mimics an Infinite Baffle alignment. To achieve the most performance from an Infinite Baffle alignment you want your Qts to be close to a 0.707 Qtc alignment of a sealed enclosure, which is why our TM8’s Qts is in the 0.8 region. With our Qts close to a 0.7 it yields the best combination of low-frequency extension and natural output capability.

Our TM8 is for those of you who want a plethora of midbass capability without sacrificing mounting depth and/or price.

Our TM8’s primary purpose is for use as a midbass driver. Its on-axis frequency response does extend up to 4,500 Hz so it can be mated to our M3 Carbon midrange and M25 mkII tweeter for a 3-way setup or mated up directly to our M25 mkII tweeter for a 2-way setup.

In-vehicle frequency range is 27 Hz to 7,000 Hz. We recommend a high-pass crossover frequency of 40 Hz or higher. Recommended high-pass crossover slope is equal to, or greater than, 24 dB/octave. Recommended crossover frequency for a 2-way setup is 3,000 Hz. Klippel measurements can be viewed by clicking the images above.

Features

• 2″ diameter copper voice coil
• CZA Voice Coil Former
• Aluminum Cone
• Rubber Surround
• Nomex spider
• Copper pole sleeve
• Magnet ID shorting ring
• Custom tooled cast aluminum basket
• Integrated rain shield
• Push terminals
• Single 4 Ohm voice coil impedance
• Designed specifically for IB use (in a vehicle door)

Specifications:

Quick Info

• Weight 4 lbs
• Dimensions (OD) 209 mm
• Dimensions (Cutout) 183 mm
• Mounting Depth 58 mm
• RMS 150 watts
• Impedance 4 Ohms

Materials

• Surround Material Rubber –
• Cone Material aluminium –
• Voice Coil Material copper –
• Magnet Material Ferrite –

Thiele-Small Parameters

• Re 3.8 Ohms
• Fs 58 Hz
• Qes 1.08 –
• Qts 0.83 –
• Le 0.19 mH
• Sd 35.17 square inches
• Vas 17.1 Liters
• BL 6.35 Tesla Meters
• Mms 32.3 grams
• Cms 233 µM/N
• Xmax 7 mm one-way 70% BL
• Xmech 11 mm one-way
• SPL 90 dB

Performance & Compliance

• Frequency Response Minimum 25 Hz
• Frequency Response Maximum 6000 Hz
• Sensitivity 90 dB

Enclosure Recommendations

• Sealed Enclosure Volume 0.2 cubic feet
• Maximum Sealed Enclosure Volume 1.5 cubic feet
• Ported Enclosure Volume 3.0 cubic feet
• Minimum Ported Enclosure Volume 2.5 cubic feet
• Maximum Ported Enclosure Volume 3.5 cubic feet
• Ported Enclosure Tuning 28 Hz
• Port Surface Area 7 square inches

Additional Specifications

• Voice Coil Diameter 50 mm
• Terminal Type Spring –
• Basket OD Flange Thickness 4.2 mm
• Gross Weight 4 lbs

Sold As Pair