Transcript
HM40P CLIP-ON INSTRUMENT CONDENSER MICROPHONE PM5 PHANTOM POWER ADAPTER
Table Of Contents Introduction HM40P Features Using the HM40P Powering the HM40P Microphone Placement and Positioning HM40P Polar Pattern HM40P Frequency Response HM40P Specifications Copyright 2003, Samson Technologies Corp. Printed October, 2003 Samson Technologies Corp. 575 Underhill Blvd. P.O. Box 9031 Syosset, NY 11791-9031 Phone: 1-800-3-SAMSON (1-800-372-6766) Fax: 516-364-3888 www.samsontech.com
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Introduction Thank you for purchasing the Samson HM40P Wind Instrument Microphone with the PM5 phantom power adapter. The HM40P is a professional clip-on microphone specially designed for performing musicians who need to amplify their brass, woodwind or even percussion instruments. Manufactured with extreme care and the highest quality components, the microphone delivers an exceptionally clear, articulate sound, with superior rejection of background noise. It’s simple to attach the microphone to the bell of a brass or woodwind instrument using the intergrated clip. And, positioning the microphone element for the optimum sound is easy thanks to the HM40P’s built-in flexible gooseneck. A maximum amount of “gain-before-feedback” can be achieved as a result of the HM40P’s tight, super cardioid pick-up pattern. In addition, the high SPL capability make the HM40P, along with the PM5 phantom power adapter, an excellent choice for a wide variety of instrument miking applications. In this manual, you’ll find a more detailed description of the features of your HM40P, as well as instructions for using your HM40P with the PM5 phantom power adapter, and complete specifications. You’ll also find a warranty card enclosed—don’t forget to fill it out and mail it in! This will enable you to receive online technical support and will allow us to send you updated information about other Samson products in the future. Should your HM40P Instrument Microphone or PM5 ever require servicing, a Return Authorization number (RA) must be obtained before shipping your unit to Samson. Without this number, the unit will not be accepted. Please call Samson at 1-800-3SAMSON (1-800-372-6766) for a Return Authorization number prior to shipping your unit. Please retain the original packing material and, if possible, return the HM40P in its original carton and packing materials.
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HM40P Features The Samson HM40P utilizes state-of-the-art microphone technology and is engineered to the finest detail. Here are some of its main features: • The HM40P microphone is shock-mounted to a high quality gooseneck boom constructed of brass over stainless steel wire with matt black polyurethane covering terminating in a convenient spring-loaded clip for attaching to most any instrument. • Lightweight, low visibility design for unobtrusive use. • High quality Electret condenser element delivers high output and exceptional sound quality. • Full range frequency response for clear, crisp audio and natural sound reproduction. • Tight supercardioid polar pattern reduces background noise, minimizes feedback problems and effectively rejects signals not originating directly in front of the mic capsule. • The HM40P microphone terminates with a P3 mini XLR connector, which plugs into to the PM5 phantom power adapter. • The PM5 phantom power adapter is used to supply the HM40P microphone with phantom power, while transforming the impedance from high to low to compensate for longer cable runs. • The HM40P includes internal radio frequency (RF) suppression, making it suitable for use in high-RF urban areas.
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Using the HM40P Powering the HM40P The PM5 phantom power adapter with its special interface enables a mixer to provide phantom power to condense microphones. The PM5 converts high impedance (50 k – 10meg ohm) to low impedance (200 ohms), allowing long cable runs without noise and gain loss. Connect the P3 mini XLR plug from your HM40P into the locking input of the PM5. Connect an XLR cable from the PM5 to the input of your mixer. Be sure to enable your mixer’s phantom power on the channel you have connected the HM40P to. Clip the PM5 to your belt loop or some other part of your clothing, as not to cause strain by pulling on the wire coming from the microphone. You should also select a thin, lightweight XLR cable for this interface. Microphone Placement and Positioning Although the HM40P was designed primarily for wind instruments, the extended frequency response and high SPL capability make it an ideal microphone for many instruments. You can clip it on the rim of a conga or other drums and percussion instruments, place it inside the sound hole an acoustic guitar, clip it on the chin rest of a violin, place it inside the lid of an upright piano, and of course, on the bell of a brass or woodwind instrument. The HM40P will naturally reproduce the sound of your instrument.
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Using the HM40P Microphone Placement and Positioning - Continued When positioning the HM40P, there are some general rules that you should follow. Always position the microphone as close to the sound source as possible. This is easy with the HM40P since the integrated gooseneck guarantees the mic element is close to the source. Also, keep in mind that in order to minimize feedback problems you want to position the microphone, (and if necessary yourself), behind the main PA speakers. Be aware of a phenomenon called the proximity effect, which causes a noticeable increase in low frequencies (bass response) when a microphone is close to the audio source. This means that by making slight adjustments to the distance of the mic element, you can get a change in the tonal quality of your sound. Keep in mind that your sound is as personal as your playing style, therefore, you may find changing the microphone position gets you just the sound you looking for. The following section shows examples of some common applications for using the HM40P. As always, experience is the best teacher, so plug in and turn up!
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Using the HM40P
Trumpet – Use the built-in clip to attach the HM40P to the bottom of the bell on the instrument. Aim the microphone towards the center of the bell, but since the trumpet is capable of producing some of the highest SPL levels, start with the mic element positioned away from the bell. Try bringing the microphone element in closer to the bell for better isolation and more low frequency response.
Saxophone – Use the built-in clip to attach the HM40P to the bell of the instrument and position the mic about 1 to 2-inches from the center of the bell. You can move the mic out a little to get some extra edge, or closer for some extra warmth.
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Using the HM40P
Trombone – Attach the HM40P clip to the bottom of the bell and position the microphone directly into the center. In this position you will get the maximum isolation with full frequency response.
Snare Drum – The HM40P is great for getting the highend crack from a snare drum. Simply clip the microphone on to the rim of the drum and position the element about 1-inch away from the head. You can use the HM40P in combination with a dynamic microphone like the Samson Q Snare. Place the Q Snare on top and the HM40P on the bottom to emphasize the snare sound.
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HM40P Polar Pattern Every microphone has a characteristic polar pattern that determines how well it accepts or rejects signal coming from various areas around the microphone. For example, omnidirectional mics accept all signals regardless of where those signals originate (in front of the mic, behind it, to the side, etc.). In contrast, directional cardioid mics are specifically designed to accept mostly signal coming from directly in front, and to reject signal coming from behind or from the side. The supercardioid pattern is utilized by the HM40P (as shown in the illustration below). For this reason, the HM40P excels in environments where there is a good deal of unwanted ambient sound—it delivers those signals originating directly in front of the mic capsule itself while rejecting those that originate from behind. The polar pattern also determines how prone a particular mic is to inducing feedback. Feedback is that characteristic nasty howling sound that occurs when a mic is placed too close to a loudspeaker—the signal from the loudspeaker is fed into the mic, then into the loudspeaker, then into the mic, over and over again until an oscillating tone is generated. Because the super cardioid pattern utilized by the HM40P is so good at rejecting signal not coming from in front of the mic, you’ll find that use of the HM40P greatly minimizes feedback problems.
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HM40P Polar Pattern
HM40P Frequency Response The HM40P can be mounted to just about any instrument using the built-in mic clip, and due to its unique mic element shock mounting, it generates significantly less handling noise than most other microphones. Take care not to cover the any part of the mic element with your hand. Also, be aware of a phenomenon called the proximity effect, which causes a noticeable increase in low frequencies (bass response) when a microphone is close to the audio source. This can have positive impact—for example, it will cause your instrument to sound much fuller when you position the mic than when you push the mic away from the sound source. This may a little difficult to hear at first, but after some experimentation and experience, you’ll find that a slight adjustment can actually make a big difference in sound. The HM40 has been designed to be used up close to the sound source, since it provides a built-in windscreen for removal of pops, sibilance and onstage noise. The key to developing the best mic technique is experimentation, along with awareness of the general principle that, the closer your HM40P is to a signal source, the HM40P Frequency Response greater the bass response.
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HM40 Specifications Condenser microphone
Polar Pattern:
Super Cardioid
Frequency Response:
40~18000 Hz
Sensitivity:
-42 dbV/pa (8mv/pa)
Rated Impedance:
200Ω
Equivalent Noise Level:
23dB (A weighted IEC/DIN 651)
Max. SPL:
137 dB (THD less than but equal to 0.5% 1000 Hz)
Dynamic Range:
114 dB
S/N Ratio:
71 dB, 1K, 1PA
Power Supply:
48V Phantom power (IEC 26815/DIN 45596)
21mm
Current Consumption:
3.5 mA
Weight:
160 g (power supply excluded)
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107mm
Type:
Samson Technologies Corp. • 575 Underhill Blvd. • P.O. Box 9031 • Syosset, NY 11791-9031 Phone: 1-800-3-SAMSON (1-800-372-6766) • Fax: 516-364-3888
[email protected] • www.samsontech.com
