-40%
Speaker RARE 4
Speaker RARE 4
Speaker RARE 4
Speaker RARE 4
Speaker RARE 4
Speaker RARE 4
Speaker RARE 4
Speaker RARE 4

Speaker RARE 4" inch 40 ohm (measured) 4BM-S45 Oxford? Tube radio vintage AlNiCo

$ 7.91

Availability: 19 in stock
  • All returns accepted: Returns Accepted
  • Refund will be given as: Money Back
  • Return shipping will be paid by: Buyer
  • Country/Region of Manufacture: United States
  • Output Watts: 1 W (Typical)
  • Size (Inch): 4 inch
  • Condition: Cone in good condition on one and small repair on other (2 in hand). Edge rim a bit rough (no issue) Frame have some painted spots. Fully tested. See high definition photos!
  • Restocking Fee: No
  • Impedance: 40 ohm (Measured)
  • Brand: Oxford
  • Model: 4BM-S45
  • MPN: 4BM-S45
  • Item must be returned within: 30 Days

    Description

    FULLY TESTED!
    Nice vintage Tube RADIO / TV speaker driver by oxford (465 mfg code), code ID=
    4BM-S45
    , probably made in USA. Size is 4". This speaker is probably from early 1960s. Output typical is 1W for this type, and coil resistance measures 40 ohm which can lead to an impedance of 32 to 45 ohms. It delivers a good full range sound and tested under 16 ohms load impedance. Cone in good shape. Package weight 12 oz.
    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
    analyze
    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-172
    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 ohm, look first for a 4 ohm. If none available, choose 3.2 ohm or 6 ohm at max but ideally, use the same impedance (not 8 or 16 ohm to replace a 4 ohm). 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.