The CM-HPX1 from Sonifex is a passive transformer-balanced headphone amplifier that allows you to connect a balanced stereo input via a pair of rear-panel XLR connectors and send it to headphones connected to a front-panel 1/4" jack with level control. The unit requires no power and uses a transformer with a 2:1 ratio to ensure that any headphone load presented at the output is reflected through to the input at a 1:4 ratio; this means that a 150-ohm set of headphones looks like 600 ohms at the input, a suitable load for most good quality line output stages. The CM-MNT1 desk-mount plate (available separately) allows you to conveniently mount the unit to the underside of a desk.

Passive Headphone Amp    Transformer Balanced    2:1 Transformer Ratio    Stereo XLR Input    1/4" Headphone Jack with Level Knob

Related Questions and Answers

Q: 1. can it connect by bluetooth?

A: The Polsen BCPM-1 Passive Belt Clip Personal In-Ear Monitor Amplifier does not have Bluetooth built-in but if you have Bluetooth headphones, you can use a separate Bluetooth transmitter like the Aluratek ABT01F Bluetooth Universal Audio Transmitter (B&H # ALABT01F) to enable compatibility with Bluetooth headphones.

Q: 2. How do you plug this into a Behringer audio board? Could this work as a sideline reporter kit?

A: Should work and connect via the provided I/O:Mono In: 1 x 3-pin XLR femaleStereo In (L/R): 2 x 3-pin XLR female, balancedMic In: 1 x 3-pin XLR female Phone: 1 x 3.5 mm jack; 1 x 1/4 jackMic Out: 1 x 3-pin XLR male

Q: 3. Does this provide phantom power to mics that require it?

A: 'No' ... it is strictly a passive unit!

Q: 4. Can this passive version take stereo input? or just mono?

A: There is an internal switch that allows you to select a mono or stereo source.

Q: 5. Does this passive version also have a mono / stereo switch inside?

A: No, both R&L Volume adjust together with one dial.

Q: 6. Do you need two boxes for the producer to talk to the talent or can you simply plug a microphone into one of the XLR inputs to talk to talent?

A: No you can plug the mic out from the box into one of the mic input channels of the mixer. Then the talent will hear you through the cue mix from the Aux sends.

Q: 7. Does this work with Elinchrom speedring for Rotalux softboxes?

A: In order to use the Broncolor Octabox 150 cm (59.1") with an Elinchrom system you would need the following speedring from Impact. Impact Speed Ring for Elinchrom EL and Impact EX BH #IMSRELI • MFR #SR-ELI

Q: 8. Do you need to use a headphone amp w/ this? Or does it require phantom power?

A: This is a passive headphone amplifer, meaning it does not require power. Connect a cable from a monitor output of a mixing board to this device, and you can attach headphones or in-ear monitors to recieve a personal mix. The unit also has headphone volume control.

Q: 9. Will this work with a Sony A6400?

A: Yes, the Kopul CMX-2-V2 Two-Channel Passive DSLR XLR Adapter is compatible for use with the 3.5 mm TRS stereo microphone input on the Sony a6400 Mirrorless Camera.

Q: 10. Can you please suggest a compatible speedring to use this softbox on paul c buffs Einsten 640 monolights?

A: Not true... Just buy the broncolor balcar speedring. Or any speedring for that matter that supports balcar. This will do: https://a href= http://www.bhphotovideo.com/c/product/884597-REG/impact_sr_pcb_speed_ring_for_paul.html target= _blank www.bhphotovideo.com/c/product/884597-REG/impact_sr_pcb_speed_ring_for_paul.html/aOR just get yourself a Paul C. Buff foldable octabox. It's well built and easy to assemble. WAY WAY easier then traditional octaboxes.