Speaker SONY 212-21 3" X 4 3/4" inch 8 ohms 1W full range Vintage AlNiCo

Description

FULLY TESTED!
Nice vintage RADIO / TV speaker driver by Sony, code ID= 212-21, from Japan. External size is 3 1/8" X 4 3/4". Cross holes measurement is 4 1/4" approx. (Diagonal center/center fixation hole measurement). Thickness is 1 1/2" (base to top magnet). This speaker is from the mid to late 1960s. It's is rated 1 Watt, with a 8 ohms impedance. It delivers a good full range sound! Cone in great condition. Shipping weight: 10 oz package
I have this speaker and a lot of other vintage speakers now listed (or to be listed soon), in hand for more then 25 years and up from working in electronic since early 1980s. Check out my other vintage speaker drivers and various items on sale in my store.
FULLY TESTED
All my Speaker drivers are tested with music at the proper impedance setting using a multiple impedance output PA amplifier from radio shack and a FLAC music player on AUX. My criteria is simple, to hear a nice clean sound with no distortion or scratchy sound due to defective voice coil or impurities accumulated on magnet, or due to any cone issues. The type of sound a driver delivers is not considered in the analyse as there are many types of sound depending of many construction aspect (IE: less bass/treble) and it's uses. One of the photos with listing may show the driver under test (if there are wires connected).
SP-151
SHIPPING TO
USA
FROM CANADA: Using USPS service
(3 to 10 business days most of the time)
(exclude Hawaii & Alaska)
SHIPPING To
CANADA
varies by provinces. Please contact me for quotation, thanks.
IMPORTANT INFORMATION
when ordering a replacement speaker:
If you're looking for a replacement speaker, the first important thing to look for is the size in length. If you want to replace a 4 inch speaker in a device, look for this size first and shape type (round, square). See as well the measurement of the fixation holes (when
equipped
) as it have to be re-installed properly. Then the 2nd important data is the impedance. If it's 4 ohms, look first for a 4 ohms. If none available, choose 3.2 ohms or 6 ohms at max but ideally, use the same impedance (not 8 or 16 ohms to replace a 4 ohms). 3rd, it's watt output rating. This is not a must in some case, mainly for a TV or a Radio replacement speaker but the nearest value will give the best result. Don't choose either too low (it may fried the speaker coil) or too high (speaker will not vibrate enough). A 1 to 2 watt speaker would be fine to replace a 1 Watt speaker for example. And finally, it's thickness. This will be an important factor when the speaker is located in a restricted area. If you have 2 inches available, then go below this measurement to be sure it will fit.