Product Specifications :-
Diameter - 10.14 cm (4 inch)
Height - 5.4 cm (2.12 inch)
Height 2.12 inch
Weight - 0.5 Kgs
Use - Car/Studio/Bookshelf/Home Audio
Type - Depends on amplifier tuning. Can be used as Pure subwoofer or a mid range driver (with low power amp input)
Audio Signature 4 inch Subwoofer
Chassis Material - Stamped CR steel, 0.4 mm metal grade, zinc coated. (Competitive products will have only 0.2 mm metal grade chassis)
Cone Material - Rubber cone with rubber outer ring.
Subwoofer weight 500 Grams
Voice coil - The VC suspension vibrates inside 3.5 mm thick bore plate. Fitting plate above magnet is 3.5 mm again. Competitive products will have, thinner, 2.5 mm bore and fitting plates. This makes Fredo 4 inch subwoofer weight 500 grams without packing.
Magnet Material - Y30 grade single ferrite. Outer Dia 72 mm.Thickness 15 mm.
Packing Material - Wood.
Warranty - 1 year / 7 days replacement.
Power Ratings :-
Impedance - 4 Ohms
Nominal Power - 35 W
Peak/Shorting Power - 125 W
RMS Power - Nominal Power (35) x 0.707 = 24.7 W
TS Parameters Electrical :-
Q mechanical - 3.51
Q electrical - 0.81
Q total - 0.65
Resonance Frequency - 54 Hz
VAS - 4.9 Litres
DC Resistance - 3.8 Ohms
BL, motor strength - 7.11 Tesla meter
SPL (2.83V @ 1 meter) - 89 dB
TS Parameters Mechanical :-
Voice coil Dia - 35 mm (with winding)
Voice coil layers - 4 layer
Mechanical compliance of suspension (Cms) - 0.73 mm/N
Surface area of cone - 75 sq cm, excluding voice coil hole.
Voice coil Inductance, Le - 0.9 milliHenry
VC material & gauge - Copper 36 gauge
VC cylinder - Kapton paper of 25 mm dia, giving us liberty to wind 4 layer copper coil. Competitive products will have, smaller, 812 Thou (20.6 mm) voice coil diameter, on which only 2 layer copper coil can be wound.
Chassis - Stamped steel, later zinc coated and finally black powder coated. Heaviest chassis available for 4 inch products.
Dust Cap - Paper
Recommended Amplifier :-
20 W to 30 W or IC 2030 Circuit.
Recommended Box volume :-
L Port type with 4.1 litre volume (0.145 cubic feet)
Product Pictures :-
Buying Options :-
Cash on Delivery all over India.
Bank EMI available on credit cards
Courier tracking updates on WhatsApp
Secure Transactions :-
Our Razorpay payment security system encrypts your information during transmission. We do not share your credit card details with third party sellers.
Fredo Speakers Trust Seal
Payment options :-
UPI - Google Pay/PayTM/PhonePE/CredUPI
All Debit & Credit cards/EMI/Net Banking
Wallets - Amazon Pay/Mobikwik/PhonePE
Pay Later by HDFC
Lazy pay by ICICI
Returns :-
In case of physical damage, defective or wrong item, we REPLACE the items within 7 days of delivery.
Return Policy :-
Replacement
Customer Reviews :-
