SKU: 76262166798

Sennheiser SKM 9000 NI A1-A4

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Description

Sennheiser SKM 9000 NI A1-A4Sennheiser SKM 9000 NI A1 A4 Digital Handheld Wireless Transmitter (Nickel) The Sennheiser SKM 9000 NI A1 A4 (Article Number: 504726 Command Variant: 504722) is a flagship, elite tier digital handheld wireless microphone transmitter from Sennheisers reference Digital 9000 platform. Built without compromise for international music tours, high profile broadcast television networks, and premium live performances, this modular "body only" transmitter

Sennheiser SKM 9000 NI A1-A4 Digital Handheld Wireless Transmitter (Nickel)

The Sennheiser SKM 9000 NI A1-A4 (Article Number: 504726 / Command Variant: 504722) is a flagship, elite-tier digital handheld wireless microphone transmitter from Sennheiser’s reference Digital 9000 platform. Built without compromise for international music tours, high-profile broadcast television networks, and premium live performances, this modular "body-only" transmitter achieves completely uncompressed, artifact-free wireless audio transmission that mirrors a high-end studio cable connection.

The "NI" designation highlights its premium, reflection-free Brushed Nickel finish. This specific variant operates within the low-UHF A1-A4 frequency band (470.000 MHz to 558.000 MHz) with an agile 88 MHz tuning bandwidth.

Key Acoustic and Digital RF Attributes

  • Uncompressed HD Digital Transmission: Unlike traditional wireless systems that employ standard analog compandors to crush dynamics, High Definition (HD) Mode bypasses all companding algorithms to transmit completely raw, 24-bit digital audio. This preserves absolute dynamic transparency and linear high-frequency tracking.

  • Linear Intermodulation-Free Equidistant Grid: The SKM 9000 handles internal RF amplification linearly, generating zero intermodulation distortion. This allows multi-channel setups to be laid out on an equidistant frequency grid (spaced at uniform 600 kHz intervals). Operators can drop channels right next to each other in crowded spectrum windows without complex math or ghost frequencies.

  • Broad Modular Capsule Compatibility: Features a premium, universal microphone head interface node. It is fully compatible with specialized Digital 9000 dynamic/condenser capsules (such as the MD 9235, ME 9002, or ME 9004), legacy evolution wireless (G3/G4) and 2000 series heads, and high-end studio options like the Neumann KK 204 and KK 205 condenser heads.

  • Integrated Infrared Setup Link: Outfitted with an integrated IR window inside the lower chassis ring. It can execute immediate automatic configuration, gain calibration, and master frequency sync with the EM 9046 multi-channel receiver in seconds.

Technical Specifications Matrix

Feature Parameter Hardware Specification Profile
Model Reference Name SKM 9000 NI A1-A4
Official Article Number 504726 (Standard Version) / 504722 (COM Version with Command Switch)
RF Operational Band A1-A4 Block (470.000 MHz to 558.000 MHz)
Switching Tuning Bandwidth 88 MHz available (Tunable in ultra-fine 25 kHz increments)
Digital Transmission Modes High Definition (HD) Mode / Long Range (LR) Mode
System Audio Frequency Response 80 Hz to 20,000 Hz (Flat tracking down to 3 dB)
Audio Gain Adjustment Scale 0 dB to +62 dB (adjustable in highly precise 3 dB steps)
Integrated Low-Cut Filter Switchable: Flat, 60 Hz, 80 Hz, 100 Hz, 120 Hz
RF Output Transmission Power HD Mode: 10 mW RMS / LR Mode: 25 mW RMS
Power Solution (Transmitter) Optional BA 60 Li-ion Accupack (5.5 hrs) or B 60 Dry Battery Case (2 x AA)
Physical Dimensions Array 270 mm (Length) x 40 mm (Diameter)
Hardware Casing Finish Premium Brushed Nickel Coating
Net Operational Weight Approx. 350 grams (including BA 60 pack and standard capsule)

In the Box: Production Package Inventory

  • 1 x SKM 9000 Handheld Transmitter (Brushed Nickel, A1-A4 Band)

  • 1 x MZQ 9000 Heavy-Duty Microphone Stand Clip

  • 1 x Instruction Manual

  • 1 x Frequency Allocation Chart

  • (Note: Microphone capsule and power packs are sold separately to meet user preference)

Production Deployment and Modular Fitting Advice

System Architecture and Capsule Selection: Remember that the SKM 9000 is a modular component and cannot function on its own. It requires a compatible Digital 9000 or Digital 6000 series receiver and a screw-on microphone capsule head. When threading a capsule onto the nickel handle, ensure the concentric contact rings are completely free of dust or oils. Spin the capsule down smoothly hand-tight until it stops; never use tools to over-torque the head.

Managing Power Options on Stage: To keep active stage tracking seamless, the SKM 9000 requires either the BA 60 rechargeable lithium-ion battery pack (offering 5.5 hours of uncompressed transmission runtime) or the B 60 adapter frame for standard AA batteries. Monitor real-time telemetry on the receiver rack face or the transmitter's backlit display. If you notice severe voltage drop warning bars when using AA alkaline cells, prioritize a hot-swap before the 4-hour mark to maintain stable signal output.

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SKU: 76262166798

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4.6 ★★★★★
Based on 8 reviews
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M
Verified Purchase
Mark
Dallas, US
★★★★★ 2
Decent, but be careful of frequent use.
Size: 12 Pairs / 24 pcs, Size: 12 Pairs / 24 pcs
The looks are very nice, functional if left alone once assembled. After that I would leave them alone otherwise you risk the main male portion just coming loose of the housing, sound quality is decent, nothing to write home about, but again, not very durable. If they could fix that 1 thing, these would be very good buy and value, the rest of each plug is hefty and well made.
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Reviewed in the United States on January 12, 2026
J
Verified Purchase
James
Whiting, US
★★★★★ 5
Great Banana Plugs
Size: 6 Pairs / 12 pcs
I recently purchased these FosPower banana plugs to tidy up my speaker wiring, and they’ve been a significant improvement over bare wire ends. Installation is straightforward: strip the wire, loosen the two tiny set screws, slide the wire in, tighten everything down, and then screw the barrel back on. Once assembled, the connection feels secure and tight, making it much easier to swap gear around and reducing the risk of stray strands causing a short. The standout feature of this design is the dual set-screw clamp. It firmly grips the speaker wire without relying on the outer collar to “crush” it in place. I’m using 12-gauge wire, and it holds well for my setup. Initially, the plugs may fit snugly in some binding posts. Once seated, there’s no wobble, but it might take a bit of extra push the first time. The set screws are small, so a bit of precision is needed. Use a small flathead screwdriver and don’t over-tighten them. Overall, these plugs feel well-made, look clean once installed, and fulfill their purpose as banana plugs: making speaker connections quick, neat, and reliable.
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Reviewed in the United States on May 27, 2026
T
Verified Purchase
Todd C Blake
Dallas, US
★★★★★ 5
Great Banana Plugs!
Size: 6 Pairs / 12 pcs
These FosPower banana plugs work very well. I have used dozens of these great FosPower banana plugs over the years, and they definitely work as advertised. When comparing apples to apples (or bananas in this case....lol), all Banana plugs work virtually the same way, and these banana plugs are no different. Strip speaker wire, unscrew banana plug cover, loosen speaker wire retaining screw(s), insert speaker wire, tighten speaker wire retaining screw(s), screw on banana plug cover, and wallah, a secure/conductive speaker/amplifier wire connector is created. Albeit, some banana plugs require the speaker wire to be splayed over a hollow post, and then they are held down by a screw-on retainer/cover. However, I much prefer these FosPower dual retaining screw type of banana plugs for their speaker wire holding ability. I always use high quality 14 gauge OFC speaker wire with these FosPower banana plugs, and they work perfectly together. I have used these FosPower banana plugs with many different speaker and amplifier brands over the years, including Klipsch, Pioneer, Polk, Denon, Dayton Audio, and Fosi with no problems at all. They just work, and work well. I have never had a FosPower banana plug break, release the speaker wire or short out, in all of the years that I have used them. Yes, these FosPower banana plugs do fit rather tightly into the connectors, at first, on a lot of speaker and amplifier brands/models. However, after the initial "squeeze" the banana plugs will lossen up, and become easier to install and remove. However, they still retain their great holding ability even after the initial squeeze. In order to overcome this initial "tightness," I usually just stick the FosPower banana plugs into a connector of an old portable amplifier, before assembling them, in order to squeeze them before inserting them into their final speaker or amplifier destinations. This is especially useful when working in tight places, where there is not much room to work in order to push the FosPower banana plugs into their tight connections firmly. Overall, I highly recommend these FosPower banana plugs. I am currently using them all over the house and shop for home theater and music listening (and testing projects). Just be aware of the tight fit in some speakers and amplifiers. Also, the 2 very tiny speaker wire retaining screws can be a challenge sometimes. Just use a good standard blade jewelers screwdriver, and be careful not to remove the retaining screws all of the way or over-tighten them. Once these things are mastered, using these FosPower banana plugs becomes second nature. Have fun!
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Reviewed in the United States on August 28, 2024
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Verified Purchase
Steve M Vedder
Lowell, US
★★★★★ 5
Great Product
Size: 6 Pairs / 12 pcs
These banana plugs have worked perfectly, no matter what gauge I have run in them, they work great. Easy assembly and great quality.
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Reviewed in the United States on May 8, 2026
P
Verified Purchase
PowerTripp
Carnegie, US
★★★★★ 4
The most legit banana plugs I could find on Amazon
Size: 6 Pairs / 12 pcs, Size: 6 Pairs / 12 pcs
NEW PREFACE:: I am kind of glad I first bought the horribly magnetic, horribly made and GOLD PAINTED Sewell crimp on plugs (some reviewers say that Sewell are better and easier to use than the FosPower, which is true in design, but in quality of materials FosPower beats them hands down!!) ... Changing from those to these FosPower plugs plus the Monoprice 90° plugs, I am flabbergasted at the difference they make in sound quality. I have heard people say that they can hear the difference and even as an audiophile I was skeptical..... but my skepticism has been completely erased by what I am hearing with my own ears. I waited a few days to make sure I wasn’t just tripping before updating this review 🤣....but it has become clear to me how much a difference plugs made from the right materials actually make!!! I am 100% serious that the bass coming out of my Polk Signature Series tower speakers has at least doubled at the same volume. I can also now turn the volume up Way past my max volume before, without any distortion and much more clarity and less harsh highs. Everything just sounds warmer in general now which is amazing!!!! This is dangerous info for me... because now I’m thinking about making some really nice custom wires to see how much of a difference that makes 🙄🙄🤣 OK onto the review of the actual plugs here~~ These seem like decent connectors. I can’t tell if they are brass or copper, but they only have a slight hint of a magnetic property when testing them with a very powerful magnet. I was easily able to fit x2 - 14ga wires into it for bi-wiring purposes, including screwing on the collar. (As seen in my example pic) The gold plating on the tips seems legit and not painted like some of the plugs from Sewell... I have tested and tried quite a few plugs from Amazon and most seem to be crap. These however hold up better than most! These and the Monoprice 90° banana plugs with the black and red rubber sleeves. The latter are gold plated copper and have zero magnetic properties. (if you need 90° banana plugs) UPDATE: still the best plugs I have found, but upon full install found two issues. One is a defect where a set of the plug threads for the barrel cover body weren’t cut right. The body’s do not tighten and stay loose because of that. Obvious issue for vibration with metal on metal... The other issue is that even though these say they can fit different gauge wires, they seem to be geared more towards 12 or 10 gauge. I am using semi solid strand 14 gauge and find that unless I fold the wire over to make it double thick, the bolts use up all the thread and seem to become kind of loose inside the body. They won’t fully seat and keep spinning no matter how much you tighten. They seem to stay secure still but I just wonder about longevity over time with vibrations. So I just doubled up the wire and they seated fine! Not the worst issue in the world, but just kind of a pain since you have to strip the wire longer than you normally would so you can fold it over. ANOTHER UPDATE: I had to remove these plugs from the wire to connect them to a crappy spring terminal amp while my better amp was in the shop. The issue I wrote about with the set screws "bottoming out" on smaller gauge wire became a more pronounced issue! I could not unscrew the set screws anymore and just had to cut the wires... So that means I will need to purchase more of these to replace the ones I cannot get wire back into. Not the best design, but still one of the best plugs I have found on Amazon.
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Reviewed in the United States on March 26, 2021

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