Presenting the m501, Grace Design’s 500 series module version of the venerable m101 mic preamplifier. Now the signature transparency and detail of our circuit designs is available for your 500 series collection.
While the 500 series market has plenty of colored mic preamplifier options, the natural, musical clarity of the m501 makes it a welcome addition to the field. This circuit is for engineers confident with the quality of the source, mic section and placement, and wish to capture it with as little coloration or distortion as possible.
The m501 module is a balanced, transformerles design, with 48V phantom, a 75Hz HPF and a 1/4” HI-Z instrument input. Also standard is our exclusive ribbon mic mode, which raises the mic input impedance, bypasses the input decoupling capacitors and deactivates 48V phantom to protect delicate ribbon mics from damage.
Large diaphragm, vintage ribbon or trusty dynamic – the m501 brings out the very best in any microphone and takes the guesswork out of your input chain.
Features:
Specifications:
GAIN RANGE (5dB steps)
- Mic input 10-65dB
- Hi-Z input -10-45dB
Output trim control
- 0 to +10dB
THD+N 1kHz, 22Hz-22kHz BW
- @ 20dB Gain +20dBu out <0.00085%
- @ 40dB Gain +20dBu out <0.0010%
- @ 60dB Gain +20dBu out <0.0050%
INTERMODULATION DISTORTION
- @ 40dB Gain, +20dBu out
SMPTE/DIN 4:1 7kHz/50Hz
- <0.0020
NOISE – REFERRED TO INPUT @ 60dB Gain
- 50Ω source <-130dB
- 150Ω source <-128dB
- 600Ω source <-124dB
CMRR, @60dB Gain, 3.5Vcm
- 100Hz >55dB
- 1kHz >75dB
- 10kHz >65dB
PHASE DEVIATION (HPF off)
- 50Hz-25kHz @40dB Gain <10
FREQUENCY RESPONSE
- Mic input @ 40dB Gain -3dB 3.8Hz-288kHz
- Mic input @ 40dB Gain -0.5dB 8.35Hz-135kHz
- Hi-Z input @ 20dB Gain -3dB 1.7Hz-180kHz
- Hi-Z input @ 20dB Gain -0.5dB 4Hz-72kHz
IMPEDANCE
- Mic input 8.1kΩ
- Mic input, Ribbon mode 20kΩ
Hi-Z input (unbalanced)
- 2.5MΩ
Hi-Z input (balanced)
- 5MΩ
Balanced Output
- 300Ω
Unbalanced Output
- 150Ω
PEAK LED METER
Green threshold
- -12dBu
Red threshold
- +16dBu
MAXIMUM OUTPUT LEVEL
- 100k Ohm load, 0.1% THD , 1kHz, API Lunchbox 27dBu
WEIGHT and DIMENSIONS
- 0.7 lb H5.25 x W1.5 x D6.6
- 316g H13.34cm x W3.81cm x D16.75cm
POWER CONSUMPTION
- Current required from +16V and -16V power supplies 120mA Max
Prompt Delivery and Professional Packaging
Our long-standing partnership with UPS FedEx DHL and other global carriers lets us offer a range of shipping services. Our warehouse staff is extremely skilled and will package your items according to our precise and exact specifications. Your goods will undergo an extensive inspection and be safely packaged prior to being sent out. Each day, we ship to thousands of customers in many countries. The fact that we are committed to becoming the biggest online retailer in the World is clear. These warehouses are in Europe in the same way as they are in USA.
Note: Orders that include more than one item are assigned a processing period depending on the item.
Before shipping, we will inspect thoroughly the items you have ordered. Most orders are shipped within 48 hours. Expected delivery time is between 3-7 days.
Returns
Stock is dynamic. It's not entirely managed by us since we are involved with multiple entities, including the factory and the storage. The actual stock can change at any moment. It is possible that your order may be out of stock once the order has been placed.
Our policy lasts for 30 days. We cannot exchange or refund your order if it has been 30 days from the date of purchase.
For your item to be returned it must be in its original packaging, unopened and in the condition you received it. The item must be in its original packaging.
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500 Series
