CUI
{Alnico/Ferrite Magnet-Low Profile Speaker Manufacturer}

Floyd Bell Inc
{High reliability/High output piezo electric alarms}

International Components Corp. "Intervox"
{Piezo, Speakers, Buzzers}

Merry Electronics Co. Ltd
{Dynamic telephone receivers-Miniature speakers and microphone cartridges}

MISCO
{Custom loudspeaker Manufacturer}

RDI
{Speakers Manufacturer, Piezo Manufacturer}

Piezo speakers offer faster response then magnet speakers because of their lower mass [no voice coil].
Magnet speakers are less efficient then piezo devices because of the loss via the voice coil.
The impedance of piezo devices decreases with frequency, it appears as a lossy capacitor.
Because of the difference in impedance over frequency between magnet and piezo speakers, care must be taken in matching them with an amplifier.
An amplifier designed to drive a magnetic speaker may have trouble driving a piezo device if the amplifier has a dynamic range above 100kHz
[because the impedance drops vary low].

MIL-DTL-12606E: LOUDSPEAKER, PERMANENT MAGNET (UNENCASED, 3-INCH AND 4-INCH DIAMETER CONE, 2-WATT;
FUNGUS, AND IMMERSION-RESISTANT), TYPE LS-445/U, M12606-01, AND M12606-02

Diagram of Electromagnetic and Permanent Magnet Speakers.

Piezo-Electric Definition, or Horn Speaker Definition

This is a listing of Speaker manufacturers and Vendors. Primarily a listing of speakers with out cases, just the physical speaker.
The types of products or devices they produce are listed under the company name, in alphabetic order.
Additional component manufacturers may be found by selecting the Components icon below, Equipment manufacturers by selecting the OEM Equipment icon.
Computer speaker sets are listed on this Computer Speaker Manufacturers page.
Definitions; Midrange Speaker, Tweeter, and Woofer