The USA-made Rolls Bellari HA543 is a stereo headphone amplifier offering low-distortion amplification with minimal phase shift for musicians, producers, and engineers in home and project studios. It accepts a stereo source via balanced XLR or unbalanced RCA input jacks, and drives 3.5mm and 1/4" stereo headphone outputs. The stereo RCA output serves as a pass-thru, allowing the input to be connected to a monitor controller, home receiver, or audio recorder.

A single knob provides up to 20 dB of gain for the headphone jacks, which can be disabled via the mute switch. The Enhance function changes the tone sent to the headphone outputs while leaving the RCA output flat. The HA543 is powered via the included 15 VDC power supply, and features a power switch with an LED indicator.

Stereo XLR & RCA Inputs    3.5mm & 1/4" Stereo Headphone Outputs    Stereo RCA Pass-Thru Jacks    Low Distortion & Phase Shift    Enhance EQ Function    Adjustable Headphone Volume    Selectable Mute    Power Switch with LED Indicator    Includes Power Supply    Made in the USA

Dual headphone outputs and stereo RCA pass-thru jacks

Balanced XLR and unbalanced RCA line-level input jacks

Adjustable volume with up to 20 dB of gain

Selectable mute function

Enhance function applies EQ designed to improve your listening experience when using low-quality headphones

Power switch with LED indicator

Related Questions and Answers

Q: 1. is the headset adjustable for smaller person?

A: The Sennheiser RS 175 Digital Wireless Headphone System BH #SERS175 will have an adult fit and will fit most adult sizes but would not fit smaller children.

Q: 2. will this work with an I-phone 11 max?

A: Yes, this is compatible with an iPhone 11 Pro Max.

Q: 3. do the headphones have a stereo jack to fit my Yamaha RX-V473 receiver?

A: Yes. The line outputs or the TOSLINK output.

Q: 4. I'm planning to use an iPhone XS with a battery powered shotgun mic that has a cable terminated with a 3.5mm TS connector. Is this adapter going to work?

A: In order for this to work, you would also need to use the following adapter in addition to the Apple one . https://bhpho.to/2MHYYem

Q: 5. I want to use the RS 175 system to monitor the output of an analog mixer that is part of a home recording setup. How much latency can I expect between the time the signal appears at the mixer and the time it reaches the headphones? I can't find any specs on latency.

A: As it operates on RF (Radio Frequency) it should provide none to very minimal Latency. Unfortunately the Sennheiser website is not providing any addition information on the Latency.

Q: 6. Is this an OEM Apple product? Are you able to make phone calls with the headset when using the adapter?

A: Yes this is Legititmate apple product and yes you can make calls and listen to music. On the iPhone 7

Q: 7. Will this product work with an iPhone 8 plus?

A: Yes, this is an original Apple product designed to use on iPhones with the lightning port. This actually has a mini DAC (digital audio converter) inside it so you can use any headphones with a traditional 3.5mm mini phono stereo plug. Or plug an aux. 3.5mm cord into it for use with a powered speaker.

Q: 8. will this work with high quality pro mics like the RODE lavalier for iPhone mics?

A: Yes. This is compatible with that Rode, and most mics that do not require phantom power.

Q: 9. does anyone besides apple make this cable?

A: I'm sure you can get a third party brand on Amazon, but every time I buy a non-apple cable they break or the phone does not always accept the input source. Get the real deal.

Q: 10. Can anyone compare the sound quality of the RS 175 to the Sennheiser HD 450BT wireless bluetooth headphones?

A: After a search, I am not finding much differences in audio. The main difference between the 2 will be the Wireless Connectivity. The 450BT provides Bluetooth to connect wirelessly to any other Bluetooth capable device. The RS 175 operates on Radio Frequency (RF) that interacts wirelessly with the Base. You will need to connect your audio source to the Base to transmit audio to the packaged headphones.