Microphone Preamplifier

Assembly

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Low-noise input stage accepting balanced XLR microphone signals, with switchable gain (20–60 dB) and selectable phantom power per channel.

Direct parts	7
Total parts	7
Used in	1 assembly
Class	Assembly

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Low-noise input stage accepting balanced XLR microphone signals, with switchable gain (20–60 dB) and selectable phantom power per channel. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Microphone Preamplifier parts and their functions

7 top-level parts · 7 parts in total · full bill of materials below

Microphone Preamplifier parts diagram: 1 input transformer, 2 preamp op-amp, 3 input gain potentiometer, 4 input pad switch, 5 phantom power relay, 6 connector, 7 SMD passive (R/C/L). 7 parts in 7 top-level items. — Microphone Preamplifier parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.

#	Part	Qty	What it does
1	Input Transformer	1×	Balanced input transformer with 1:1 ratio for isolation
2	Preamp Op-Amp	1×	Low-distortion operational amplifier with precision gain setting
3	Input Gain Potentiometer	1×	100 kΩ logarithmic potentiometer, 10-turn precision trim
4	Input Pad Switch	1×	Switchable -20 dB pad for hot microphone inputs
5	Phantom Power Relay	1×	Relay switching 48 V phantom power on/off
6	Connector	1×	Neutrik XLR female balanced input jack
7	SMD Passive (R/C/L)	1×	Bypass capacitors, input coupling networks

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Build & assembly graph

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Bill of materials for Microphone Preamplifier

7 top-level lines · 7 rows shown · 7 parts total · indented to 3 levels

#	Item / sub-assembly	Part no.	Qty/assy	Ext. qty	Parts	Type
1	Input Transformer	channel-strip-preamp-input-transformer	1×	1	·	part
2	Preamp Op-Amp	channel-strip-preamp-preamp-opamp	1×	1	·	part
3	Input Gain Potentiometer	channel-strip-preamp-gain-pot	1×	1	·	part
4	Input Pad Switch	channel-strip-preamp-input-pad-switch	1×	1	·	part
5	Phantom Power Relay	channel-strip-preamp-phantom-relay	1×	1	·	part
6	Connector	connector	1×	1	·	part
7	SMD Passive (R/C/L)	smd-passives	1×	1	·	part

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Where the microphone preamplifier is used

1 product across 1 domain contain it, directly or inside a sub-assembly

Audio & Video 1 Channel Strip

Used in 1 assembly

Channel Strip

Sourcing: possible vendors

Browse the supplier directory → Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $0.50–$100. How estimates work

Vendor	HQ	Specialty	MOQ	Lead time
🇨🇳Foxconn foxconn.com ↗	Shenzhen, CN	Electronics contract mfg	1,000 pcs	6–10 wks
🇸🇬Flex (Singapore) flex.com ↗	Singapore	Electronics contract mfg	1,000 pcs	6–10 wks
🇮🇳Dixon Technologies dixoninfo.com ↗	Noida, IN	Electronics contract mfg	1,000 pcs	6–10 wks
🇨🇳BYD Electronics bydelectronic.com ↗	Shenzhen, CN	Electronics contract mfg	1,000 pcs	6–10 wks
🇸🇬Venture Corp venture.com.sg ↗	Singapore	Electronics contract mfg	1,000 pcs	6–10 wks