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JZ Microphones BT-301
Street: $1,395 Cardioid Pencil Condenser Microphone
Description
The BT-301 is a medium-diaphragm FET condenser mic, based on the electronics and packaging of JZ’s innovative BT-201. Both are low-noise transformerless designs.
The BT-301’s self-noise rating is 5.5 dBA, which places it among the five quietest condensers on the market.
The amplifier circuit in the BT-301 is modified to accommodate the higher voltage needs of the larger capsule.
Whereas the BT-201 capsules measure 13mm in diameter, the BT-301 capsule has a 21mm diameter diaphragm (active/suspended area), on a 29.75mm backplate. Note that the BT-301 capsule is not detachable; the assembly is screwed onto the head amplifier body.
The capsule is encased in a metal basket with a relatively open-weave screen, supplemented with a “wagon wheel” cap for additional physical protection.
The diaphragm is believed to be 4-micron Mylar, as in the BT-201. The membrane is metallized via JZ’s proprietary “Golden Drops” technology, in which droplets of gold alloy are deposited onto the plastic film in a precise pattern. Pictured at right is an early prototype Golden Drops capsule.
JZ presents the BT-301 for use primarily on acoustic guitar and stringed instruments. The mic was released in 2009 as a limited edition, which means JZ will sell at most 70–100 units per year, and also that JZ will provide a lifetime warranty for the microphone.
The JZ Microphones BT-301 is also known as: BT301.
The mic was released in 2009.
Specifications
| Pickup Patterns | Pads & Filters |
|---|---|
|
Cardioid
(33 mV/Pa; 20 - 20,000 Hz) |
|
| Capsule Dimensions | Impedance | SPL/Noise |
|---|---|---|
| Diaphragm diameter: 21mm Capsule diameter: 29.75mm Diaphragm gauge: 4 microns |
50 Ohms (Low) | Max SPL: 133 dB Self-noise: 5.5 dB(A) |
| Weight | Length | Max Diameter | Interface(s) |
|---|---|---|---|
| 200g (7.05oz) | 160mm (6.30'') | 24mm (0.94'') |
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| Power Specifications |
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