Skip to content
Everything In Music Since 1958
Everything In Music Since 1958

Sennheiser EW IEM G4-TWIN-A1 Wireless Monitoring System

Out of Stock
Original price $1,749.00
Original price $1,749.00 - Original price $1,749.00
Original price $1,749.00
Current price $1,499.00
$1,499.00 - $1,499.00
Current price $1,499.00
About Inventory Status

Call or text us at 301-946-8808.

In stock: It is in stock and available to ship or pickup. Apparel must be shipped from another location and is not available for in-store pickup. We can usually ship or have these items available for pickup by the next business day if they don't require inspection, special handling, or setup. Our pickup location is 11151 Veirs Mill Rd. Silver Spring, MD 20902.

📆 Preorder: It is on the way to our warehouse. We can't predict when preorder items will arrive due to current supply chain issues. If you place an order for one of these items someone will contact you to estimate the delivery date.

Out of stock: We don't currently have it available but you're not out of luck yet. We still may be able to get it. If you order one of these items we will contact you with an estimated fulfillment date. You have the option to cancel the order if you change your mind.

Special order: The item is so special that it needs to be custom ordered for you. Some of these items are works of art and have to be made individually. Orders for special order items must be prepaid and we cannot accept cancellations or refunds.

█ Sold out: We don't think we can get this item because it was either discontinued by the manufacturer or was limited in quantity. If you want or need this item call or text us. Sometimes we can help you track down the item through other sources or help you find something similar.

About Item Conditions

Call or text us at 301-946-8808.

New: The item is brand new as received from the manufacturer with a full manufacturer warranty. Instruments such as guitars, snare drums, drum kits, brass and woodwind instruments may be opened for photography and quality control inspection and may not be in a factory sealed box.

Mint or Open Box: The item may have been opened and tested but has been repackaged. The original packaging may have superficial issues but the item itself and any originally included accessories are in perfect, like new condition.

Display Model: These items are so cool that we put them on display in our legendary shop. The condition is brand new as received from the manufacturer with manufacturer warranty. Rest assured, these items undergo a very careful inspection before shipping.

Demo: These items have been on our sales floor for demo purposes and will likely show signs of use. The original packaging may no longer be included, but you can be assured that you are receiving an awesome item and an awesome price.

Used: The item is used. These item may have varying degrees of wear. Please read the description for information about the condition of the item. Used items do not carry a warranty.

B or C Stock: Factory refurbished. These items were purchased from the manufacturer in a refurbished condition. They will show some cosmetic issues, but nothing that would impact performance. Being that these are sealed from the manufacturer, we generally do not open these to photograph the cosmetic issues. They are guaranteed to work and may have a limited warranty or you may purchase an extended warranty in some cases. Please see the listing description for item specific information.

Educational & Government Sales Quotes

Click here to inquire about an educational or government quote and discover more about our Educational & Government Sales Division.

Rugged, All-in-One Design - The Sennheiser EW IEM G4-TWIN-A1 Wireless Monitoring System

Frequency Range: 470 - 516 MHz (A1)

Get Full control over your performance and your direct link, everywhere, everyday. The G4 In-Ear Monitoring Sets make your gig an extraordinary experience not just for your audience, but also for you. The robust bodypack receiver and reliable in-ear monitoring IE 4 headphones delivering clarity along the whole frequency spectrum for daily use on stage.

  • Engineered for professional live sound: Rugged all-in-one wireless monitoring system for in-ear applications.
  • Robust bodypack receiver and reliable in-ear monitoring IE 4 headphones delivering clarity along the whole frequency spectrum for daily use on stage
  • Half-rack stereo transmitter in a full-metal housing with OLED display for full control
  • Easy and flexible wireless synchronization between transmitter and receiver via infrared/light;
  • Compatible with Sennheiser WSM control software for flexible frequency allocation
  • Up to 16 compatible channels
  • Up to 42 MHz bandwidth with 1680 selectable frequencies, fully tunable in a stable UHF range
  • Transmission Range: up to 100 meters (300 feet)
  • High RF output power (up to 50 mW) depending on country regulations



  • Dimensions: Approx. 202 x 212 x 43 mm
  • Compander: Sennheiser HDX
  • THD, total harmonic distortion: <0.9 %
  • Weight: Approx. 980 g
  • Audio Input: 2x XLR-3 1/4-inch (6.3 mm) jack combo socket, electronically balanced
  • Audio Output: 1/4-inch (6.3 mm) stereo jack socket, balanced
  • Signal-to-Noise Ratio: >90 dB
  • RF Output Power: switchable: Low: typ. 10 mW, Standard: typ. 30 mW, High: typ. 50 mW
  • Switching Bandwidth: Up to 42 MHz
  • Peak Deviation: ±48 kHz
  • Nominal Deviation: ±24 kHz
  • Modulation: Wideband FM stereo (MPX pilot tone)
  • Power Supply: 12 V DC
  • Current Consumption: Max. 350 mA
  • Max. Input Voltage: +22 dBu
  • AF Frequency Response: 25 Hz to 15 kHz
  • Temperature Range: -10 °C to +55 °C
  • Frequency Stability: ±10 ppm


  • Dimensions: Approx. 82 x 64 x 24 mm
  • Compander: Sennheiser HDX
  • THD, total harmonic distortion: ≤ 0.9 %
  • Weight (incl. batteries) approx. 125 g
  • Signal-to-noise ratio: Approx. 90 dBA
  • Switching Bandwidth: Up to 42 MHz
  • Peak Deviation: ±48 kHz
  • Nominal Deviation: ±24 kHz
  • Operating Time: Approx. 4 to 6 hours (depending on volume level)
  • Modulation: Wideband FM
  • Power Supply: 2 AA batteries, 1.5 V or BA 2015 accupack
  • Current Consumption at nominal voltage: approx. 140 mA with transmitter switched off: ≤ 25 µA
  • Adjacent Channel Rejection: Typically ≥ 65 dB
  • Audio-Output-Power: 2 x 100 mW at 32 Ω
  • Intermodulation Attenuation: Typically ≥ 70 dB
  • Limiter: –18 dB to –6 dB, adjustable in steps of 6 dB, can be switched off
  • Powering: 3 V battery, 2.4 V rechargeable battery
  • RF Sensitivity: < 4 μV, typ. 1.6 μV for 52 dBA rms S/N
  • Squelch: 5 to 25 dBµV, adjustable in steps of 2 dB
  • Bass Boost: +8 dB at 8 kHz
  • Temperature Range: -10 °C to +55 °C
  • Receiver Principle: Adaptive diversity
  • Blocking: ≥ 80 dB

Manufacturer: Sennheiser
Model: EW IEM G4-TWIN-A1
SKU: I672685-N-0-WHXX
UPC: 615104311602

We are Chuck Levin's Washington Music Center

Maryland, Virginia, and Washington DC's legendary music shop. Family-owned and operated since 1958. Buy gear the way it was meant to be bought, from a store that's been there through it all and has the vibe to prove it. We're staffed with musicians and industry experts, people that live and breathe music gear. Our mission is to help you find the right gear for your project, that thing that will bring you the most joy out of what you do. We're an authorized dealer for almost every brand, we stock items the other stores don't, so you can try before you buy. Stop by our Wheaton, MD showroom and see for yourself.

Contact us if you have questions about one of our listings or if you need help finding the right piece of gear.

Free Shipping

Offered for thousands of items when you spend $100+


+1 (301) 946-8808

Get A Quote

Get an educational or government quote

Easy Returns

Learn about returns.