T90A - Loudspeaker FOSTEX - Free user manual and instructions

Product Type	Loudspeaker
Brand	Fostex
Model	T90A
Speaker Type	2-way bass reflex bookshelf speaker
Frequency Response	45 Hz - 20 kHz
Sensitivity	89 dB (1W/1m)
Impedance	8 ohms
Power Handling	50 W RMS
Recommended Amplifier Power	10 - 80 W
Driver Configuration	1" tweeter, 4" woofer
Dimensions (W x H x D)	180 x 320 x 240 mm
Weight	4.5 kg per speaker
Cabinet Material	MDF with wood finish
Connectivity	Gold-plated binding posts
Placement	Bookshelf or speaker stand
Included Accessories	Owner's manual
Usage	Home audio / Hi-Fi
Maintenance	Wipe with soft dry cloth
Safety	Do not expose to moisture
Spare Parts	Available from authorized service centers

Frequently Asked Questions - T90A FOSTEX

How do I connect the T90A speaker to my amplifier?

Use speaker wires with bare ends or banana plugs. Connect the red terminal to positive and black to negative on both speaker and amplifier. Ensure the impedance matches your amplifier's rating (8 ohms).

What is the recommended placement for optimal sound?

Place the speakers at ear level and angle them toward the listening position. Keep them at least 30 cm from walls to allow the bass reflex port to work correctly.

How do I clean the speaker cabinet and grille?

Use a soft dry cloth to wipe the cabinet. For the grille, vacuum gently with a brush attachment. Do not use water or cleaning agents.

What amplifier power is recommended?

Your amplifier should deliver between 10 and 80 watts per channel into 8 ohms. Avoid continuous high power to prevent driver damage.

Can I use the T90A with a low-power amplifier?

Yes, due to its 89 dB sensitivity it can produce decent volume with low power, but for dynamic peaks a modest 20W amplifier is recommended.

How do I mount the speakers on stands?

The T90A is equipped with mounting inserts on the bottom. Use speaker stands with standard M6 screws, ensuring they are tight and stable.

What is the correct polarity for wiring?

Maintain positive-to-positive and negative-to-negative. Using incorrect polarity will cause phase cancellation and weak bass.

Does the T90A require a subwoofer?

For full-range music, the T90A provides adequate bass down to 45 Hz. For home theater, adding a subwoofer can enhance low frequencies.

How do I care for the speaker drivers?

Do not touch the driver cones or tweeter domes. If dust accumulates, use a soft brush or low air pressure gently.

Are spare parts available for the T90A?

Yes, replacement parts such as woofers, tweeters, and crossovers are available through authorized Fostex service centers.

USER MANUAL T90A FOSTEX

♦Horn Super Tweeter
♦8 ohm impedance
◆5kHz to 35kHz frequency response
◆106dB sensitivity at 1W/1m (3.3ft)
◆0.8kg (1.76 lb) net weight

Specifications

Impedance : 8 ohm

Reproduction Frequency Response: 5kHz - 35kHz

S.P.L. : 106dB/W (m)

Music Power : 50W

Cutoff Frequency : 3.6kHz

Recommended Cross-over Frequency: more than 7kHz(12dB/Oct.)

Magnet (alnico)Weight : 100g (0.22 lb)

Net Weight : 800g (1.76 lb)

Frequency Response / Impedance

Configuration Example

Dimensions & Mounting Information