} Lake People F311-D 2-Channel Microphone Preamplifier — Pro Audio Reserve
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Lake People F311-D 2-Channel Microphone Preamplifier

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Description

Lake People F311-D Microphone PreamplifierLake People F311-D stepped gain switches and precision channel matching

Stepped Gain Control For Repeatable Precision

The 12-step switched gain design eliminates the channel-matching problems and gain drift that plague potentiometer-based preamps. Each position clicks into place with calibrated resistor networks, delivering exactly 0, +6, +12, +18, +24, +30, +36, +42, +48, +54, +60, or +66dB of gain. When you set both channels to +36dB, they're matched to within a fraction of a dB—not approximated based on where you eyeball the knob position. This matters when you're using matched microphone pairs for stereo recording or when you need to recreate a session's gain structure months later from your notes. The switches themselves are built to survive thousands of switching cycles without developing noise or intermittent contacts, making this preamp a long-term investment rather than a disposable piece of gear.

 F311-D noise floor performance and extended frequency response

Noise Floor That Reveals Microphone Performance

At -129dB signal-to-noise ratio with 60dB of gain, the F311-D's noise floor sits well below what even the quietest studio microphones can achieve. This means you're hearing the mic's self-noise and the acoustic environment—not the preamp contributing electronic hiss. The 5Hz to 150kHz bandwidth (-3dB) captures extended low-frequency information that most preamps roll off, which matters when you're recording orchestral bass or large drum kits where subsonic energy affects the perceived weight of the sound. The less-than-0.001% THD+N figure means harmonic distortion stays inaudible even when pushing the preamp to its +25dBu maximum output level. Check out our studio microphones to pair with this reference-grade preamplification.

 Lake People F311-D essential features and rack-mount design

Essential Functions Without Unnecessary Complexity

The F311-D includes the features you need for professional recording without the bloat of unnecessary processing. Switchable 48V phantom power activates per channel pair, so you can run a dynamic and condenser mic simultaneously without phantom power hitting the dynamic. The 70Hz high-pass filter uses a 12dB/octave slope to remove subsonic rumble and reduce proximity effect buildup without audibly thinning the low end. Phase reverse on each channel helps align polarity when combining multiple microphones on a single source. The seven-stage LED meters provide fast visual feedback from -36dBr to 0dBr, with internal calibration adjustment for precise level monitoring. The 1U rack-mount chassis fits into mobile recording rigs, and the IEC power socket accepts either 115V or 230V AC via an internal switch—useful when traveling internationally with your recording setup.

Highlights

  • Twelve-step switched gain control (0 to +66dB in 6dB increments) for precise, repeatable channel matching
  • Signal-to-noise ratio of -129dB at 60dB gain with THD+N below 0.001%
  • Extended 5Hz to 150kHz bandwidth captures subsonic and ultrasonic information transparently
  • Electronically balanced XLR inputs and outputs with sub-30Ω output impedance
  • Switchable 48V phantom power per channel pair with individual phase reverse switches
  • 70Hz high-pass filter with 12dB/octave slope for controlling proximity effect and rumble
  • Seven-stage level meters (-36 to 0dBr) with internal calibration adjustment

Lake People F311 Specifications

Specification Details
Item Number 1006620
Max. Input Voltage > +21 dBu
Dimensions 483 x 44 x 166 mm (W x H x D)
Housing Form 19" / 1U Rackmount
Output Impedance < 30 Ohm
Input Impedance 5 kOhm
Additional Features Lo-Cut, 48V Phantom Power, Phase Reverse, 7-Stage Level Meters
Max. Output Level > +25 dBu
Mic Gain 0 - +66 dB (12 Steps of 6 dB)
Signal-to-Noise Ratio (SNR) -129 dB (@ 60 dB gain)
Power Supply Internal 230 V / 115 V AC (Switchable)
THD+N (@ -1 dBFs) < 0.001 %
Frequency Range 5 Hz - 150 kHz (-3 dB)
High-Pass Filter 70 Hz, 12 dB/Octave (Switchable)
Amplifier Channels 2
Inputs 2 x XLR (Electronically Balanced)
Outputs - Balanced 2 x XLR
Outputs - Unbalanced 2 x RCA

What's in the Box

Included Items
Lake People F311-D Microphone Preamplifier
Power Cable
Manual
Shipping

Shipping & Returns

  • We deliver all US orders in 3–5 business days
  • Free cancellations
  • Returns accepted within 30 days (unused items)

Order Confirmation

Once your order is placed, you will receive an order confirmation email. This confirms that we have received your order and have pre-authorized your credit card for the purchase. After confirming availability with our suppliers, we will proceed accordingly:

  • If your item is available and ready to ship within 1–2 business days, we will process the charge and arrange for shipment.

  • If your item is on backorder or unavailable, the pre-authorization will be voided and you will be notified by email.

  • Please note: While most items ship out within 1–2 business days, total delivery time is typically 3–5 business days, depending on your location and carrier handling.

Order Shipment

If your item is in stock and your payment has been processed, your order will typically ship within 1–2 business days. Total delivery time is approximately 3–5 business days from the date of order. Once shipped, you will receive tracking information at the email address provided during checkout within 24 hours of dispatch.

If you have not received tracking information within 3–5 business days of placing your order, please contact us at support@proaudioreserve.com.

The Distributor-Direct Advantage

To ensure you receive the most recent hardware revisions and 100% factory-sealed units, Pro Audio Reserve utilizes a Distributor-Direct fulfillment model. Unlike big-box retailers that may ship "floor models" or gear that has been sitting in general-purpose warehouses, your equipment is pulled directly from the primary manufacturer hub, serialized, and dispatched. This process ensures the highest level of quality control for professional-grade recording equipment.

Shipping Policy

We currently offer free shipping within the United States only. If the checkout process on our website allows you to enter a shipping address and complete your order, your location is eligible to receive delivery.

Changing Shipping Address

If you need to change your shipping address after your order has been processed or shipped, we will do our best to accommodate the request. Please note that address changes may result in delivery delays. Any additional costs incurred due to address changes, including carrier fees or rerouting charges will be the responsibility of the customer. No exceptions.

Shipping Times

All shipping times provided are estimates and should not be considered guarantees. Most orders ship out within 1–2 business days from the time payment is processed. However, total delivery time is typically 3–5 business days, depending on your location, carrier performance, and supplier fulfillment timelines.

We work closely with our vendors to ensure timely deliveries, but please note that supply chain disruptions, high-demand periods, or weather events may occasionally cause delays beyond our control.

  • To avoid misunderstandings: The “shipping time” refers to the total time from order placement to final delivery, not just when the item leaves the warehouse.

  • Cancellations: If you choose to cancel your order because it has not arrived within the estimated delivery window, you may be responsible for applicable shipping charges, restocking fees, warehouse handling costs, and other related fees.

  • Chargebacks: Customers who initiate chargebacks due to shipping delays without contacting us first may be held legally responsible for losses. We strongly encourage open communication so we can resolve any delivery concerns directly and efficiently via our Atlanta-based support team.

Delivery Options

  • Threshold Shipping: Your item will be delivered to your front door, porch, garage, or a covered entryway.

 

Why Buy From Us

We get it. You've got a lot of choice when it comes to online retailers.
Here's why we think you should shop with us at ProAudioReserve.

  • Free Shipping USA wide. 
  • 30 Day Easy Returns. Not happy with your product, we'll take it back noquestions asked.
  • Great Service. We pride ourselves on the best service, anywhere.

Reviews

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Description

Lake People F311-D Microphone PreamplifierLake People F311-D stepped gain switches and precision channel matching

Stepped Gain Control For Repeatable Precision

The 12-step switched gain design eliminates the channel-matching problems and gain drift that plague potentiometer-based preamps. Each position clicks into place with calibrated resistor networks, delivering exactly 0, +6, +12, +18, +24, +30, +36, +42, +48, +54, +60, or +66dB of gain. When you set both channels to +36dB, they're matched to within a fraction of a dB—not approximated based on where you eyeball the knob position. This matters when you're using matched microphone pairs for stereo recording or when you need to recreate a session's gain structure months later from your notes. The switches themselves are built to survive thousands of switching cycles without developing noise or intermittent contacts, making this preamp a long-term investment rather than a disposable piece of gear.

 F311-D noise floor performance and extended frequency response

Noise Floor That Reveals Microphone Performance

At -129dB signal-to-noise ratio with 60dB of gain, the F311-D's noise floor sits well below what even the quietest studio microphones can achieve. This means you're hearing the mic's self-noise and the acoustic environment—not the preamp contributing electronic hiss. The 5Hz to 150kHz bandwidth (-3dB) captures extended low-frequency information that most preamps roll off, which matters when you're recording orchestral bass or large drum kits where subsonic energy affects the perceived weight of the sound. The less-than-0.001% THD+N figure means harmonic distortion stays inaudible even when pushing the preamp to its +25dBu maximum output level. Check out our studio microphones to pair with this reference-grade preamplification.

 Lake People F311-D essential features and rack-mount design

Essential Functions Without Unnecessary Complexity

The F311-D includes the features you need for professional recording without the bloat of unnecessary processing. Switchable 48V phantom power activates per channel pair, so you can run a dynamic and condenser mic simultaneously without phantom power hitting the dynamic. The 70Hz high-pass filter uses a 12dB/octave slope to remove subsonic rumble and reduce proximity effect buildup without audibly thinning the low end. Phase reverse on each channel helps align polarity when combining multiple microphones on a single source. The seven-stage LED meters provide fast visual feedback from -36dBr to 0dBr, with internal calibration adjustment for precise level monitoring. The 1U rack-mount chassis fits into mobile recording rigs, and the IEC power socket accepts either 115V or 230V AC via an internal switch—useful when traveling internationally with your recording setup.

Highlights

  • Twelve-step switched gain control (0 to +66dB in 6dB increments) for precise, repeatable channel matching
  • Signal-to-noise ratio of -129dB at 60dB gain with THD+N below 0.001%
  • Extended 5Hz to 150kHz bandwidth captures subsonic and ultrasonic information transparently
  • Electronically balanced XLR inputs and outputs with sub-30Ω output impedance
  • Switchable 48V phantom power per channel pair with individual phase reverse switches
  • 70Hz high-pass filter with 12dB/octave slope for controlling proximity effect and rumble
  • Seven-stage level meters (-36 to 0dBr) with internal calibration adjustment

Lake People F311 Specifications

Specification Details
Item Number 1006620
Max. Input Voltage > +21 dBu
Dimensions 483 x 44 x 166 mm (W x H x D)
Housing Form 19" / 1U Rackmount
Output Impedance < 30 Ohm
Input Impedance 5 kOhm
Additional Features Lo-Cut, 48V Phantom Power, Phase Reverse, 7-Stage Level Meters
Max. Output Level > +25 dBu
Mic Gain 0 - +66 dB (12 Steps of 6 dB)
Signal-to-Noise Ratio (SNR) -129 dB (@ 60 dB gain)
Power Supply Internal 230 V / 115 V AC (Switchable)
THD+N (@ -1 dBFs) < 0.001 %
Frequency Range 5 Hz - 150 kHz (-3 dB)
High-Pass Filter 70 Hz, 12 dB/Octave (Switchable)
Amplifier Channels 2
Inputs 2 x XLR (Electronically Balanced)
Outputs - Balanced 2 x XLR
Outputs - Unbalanced 2 x RCA

What's in the Box

Included Items
Lake People F311-D Microphone Preamplifier
Power Cable
Manual
Shipping

Shipping & Returns

  • We deliver all US orders in 3–5 business days
  • Free cancellations
  • Returns accepted within 30 days (unused items)

Order Confirmation

Once your order is placed, you will receive an order confirmation email. This confirms that we have received your order and have pre-authorized your credit card for the purchase. After confirming availability with our suppliers, we will proceed accordingly:

  • If your item is available and ready to ship within 1–2 business days, we will process the charge and arrange for shipment.

  • If your item is on backorder or unavailable, the pre-authorization will be voided and you will be notified by email.

  • Please note: While most items ship out within 1–2 business days, total delivery time is typically 3–5 business days, depending on your location and carrier handling.

Order Shipment

If your item is in stock and your payment has been processed, your order will typically ship within 1–2 business days. Total delivery time is approximately 3–5 business days from the date of order. Once shipped, you will receive tracking information at the email address provided during checkout within 24 hours of dispatch.

If you have not received tracking information within 3–5 business days of placing your order, please contact us at support@proaudioreserve.com.

The Distributor-Direct Advantage

To ensure you receive the most recent hardware revisions and 100% factory-sealed units, Pro Audio Reserve utilizes a Distributor-Direct fulfillment model. Unlike big-box retailers that may ship "floor models" or gear that has been sitting in general-purpose warehouses, your equipment is pulled directly from the primary manufacturer hub, serialized, and dispatched. This process ensures the highest level of quality control for professional-grade recording equipment.

Shipping Policy

We currently offer free shipping within the United States only. If the checkout process on our website allows you to enter a shipping address and complete your order, your location is eligible to receive delivery.

Changing Shipping Address

If you need to change your shipping address after your order has been processed or shipped, we will do our best to accommodate the request. Please note that address changes may result in delivery delays. Any additional costs incurred due to address changes, including carrier fees or rerouting charges will be the responsibility of the customer. No exceptions.

Shipping Times

All shipping times provided are estimates and should not be considered guarantees. Most orders ship out within 1–2 business days from the time payment is processed. However, total delivery time is typically 3–5 business days, depending on your location, carrier performance, and supplier fulfillment timelines.

We work closely with our vendors to ensure timely deliveries, but please note that supply chain disruptions, high-demand periods, or weather events may occasionally cause delays beyond our control.

  • To avoid misunderstandings: The “shipping time” refers to the total time from order placement to final delivery, not just when the item leaves the warehouse.

  • Cancellations: If you choose to cancel your order because it has not arrived within the estimated delivery window, you may be responsible for applicable shipping charges, restocking fees, warehouse handling costs, and other related fees.

  • Chargebacks: Customers who initiate chargebacks due to shipping delays without contacting us first may be held legally responsible for losses. We strongly encourage open communication so we can resolve any delivery concerns directly and efficiently via our Atlanta-based support team.

Delivery Options

  • Threshold Shipping: Your item will be delivered to your front door, porch, garage, or a covered entryway.

 

Why Buy From Us

We get it. You've got a lot of choice when it comes to online retailers.
Here's why we think you should shop with us at ProAudioReserve.

  • Free Shipping USA wide. 
  • 30 Day Easy Returns. Not happy with your product, we'll take it back noquestions asked.
  • Great Service. We pride ourselves on the best service, anywhere.

Reviews

Customer Reviews

Be the first to write a review
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
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