The m501 from Grace Designs is a 500 series microphone preamp module, based on the company's m101 microphone preamp. While the 500 series market has plenty of colored preamp options, the natural, musical clarity of the m501 makes it a welcome addition. This circuit is for engineers who wish to capture their sources with as little coloration or distortion as possible.

The m501 module features a balanced, transformerless design, with 48V phantom, a 75Hz high-pass filter, and a 1/4" HI-Z instrument input. Also standard is a ribbon microphone mode, which raises the input impedance, bypasses the input decoupling capacitors and deactivates 48V phantom to protect delicate ribbon microphones from damage.

For 500 Series Racks    Single Channel    Wide Gain Range    Hi-Z Input    Ribbon Microphone Mode    Phantom Power    High-Pass Filter

Single channel microphone preamp in the 500 series form factor

Fast and musical transimpedance architecture

Wide 10dB to 75dB gain range

Updated audio path with 0.5% precision metal film resistors

Sealed gold contact relay for Hi-Z input switching

Ribbon microphone mode (also great for dynamic mics) - relay bypass of phantom power decoupling capacitors, increased input impedance and 48V lockout

High performance output line driver amplifier and HPF amplifier

Enhanced RFI interference suppression

12 position gold plated rotary gain switch

3 output connectors - XLR balanced, 1/4" TRS balanced and 1/4" TS unbalanced

LED indicators for +48V, ribbon mode and high-pass filter

Laser-etched black anodized frontpanel

Made in the USA

Related Questions and Answers

Q: 1. I have the Panasonic Lumix G X Vario PZ 14-42mm and the speed knob doesn't work. There's only one speed. Any fixes for this?

A: No, I'm sorry, the Panasonic Lumix G X Vario PZ 14-42mm f/3.5-5.6 ASPH. POWER O.I.S. Lens (B&H# PA144235XS) is a basic consumer PZ zoom and doesn't offer variable zoom speed as an option.

Q: 2. can you use the zoom demand if you are using the USB-c port for the URSA Mini -recorder already? Also does the Zoom demand come with a USB-C cable?

A: Yes you can use the Zoom Demand and record to external drives at the same time. The Zoom Demand is capable of doing this because it has an Input and an output for daisy chaining additional devices. However, it does not come with USB cables.

Q: 3. Will this zoom controller work using the DZOFilm DZO 20-70mm T2.9 MFT Parfocal Cine Lens on the Blackmagic Design Studio Camera 4K Pro?

A: It will not as the DZOFilm DZO 20-70mm T2.9 MFT lens is a full manual lens. It does not have any electronics for zoom or focus.

Q: 4. Is there anything like this available for the BMPCC 4K?

A: Currently, the Blackmagic Design Zoom Demand is not supported on the Blackmagic Design Pocket Cinema Camera 4K. Consider instead repurposing the Tilta Nucleus-M Wireless Lens Control System Partial Kit II (Right Handgrip) BH #TIWLCT03K2 with the CAMVATE Multipurpose Super Crab Clamp & ARRI Rosette Mount M6 Female Thread. See the links below: https://bhpho.to/2kDSiQq https://bhpho.to/3rSwVNF

Q: 5. Can you please give us a list of lenses that are compatible with this system? That might be the must efficient way to stop or slow the same question flow.

A: Here is a list of compatible lenses from Blackmagic: https://www.blackmagicdesign.com/support/faq/59009

Q: 6. So if the connectivity to the Camera/Lens is through the USB cable, how do you do that with both the Focus and Zoom control if there is only one USB input on the camera?

A: The following unit has a loop a/b ports system to accommodate your focus and zoom needs.

Q: 7. Does this come with the clamp to put on a tripod arm?

A: Yes. The item allows you to clamp down to different type of pan arms on the market.

Q: 8. Where can i find SD card PCB board to replace bad one? as BMD mentioned one of their video that SD card PCB is replaceable. Thank you

A: Please contact Blackmagic Design Technical Support for assistance on parts and repairs.

Q: 9. With an URSA Broadcast G2 and LA16x8BRM lens, if I have the camera connected to my ATEM return (for color/iris CCU), will the ATEM CCU override the zoom control that the Zoom Demand sends the camera? Or, can I use this Zoom Demand and still have ATEM control over the camera color, iris, focus, etc?

A: You can use the zoom Demand at the same time as the ATEM control. There are zoom controls in the ATEM software but it will not interact with the local zoom or focus if that software control is not touched.

Q: 10. is it work with 70~200 mirrorless cameras like S1, A7iii or R6 ?(default lenses)

A: The Blackmagic Design Zoom Demand is only compatible with Blackmagic Design cameras.