Overview
The analogue HY-03 telephone hybrid is a high-quality replacement for the HY-02, featuring a range of useful features. It is fully automatic, adapting to varying line conditions and has automatic signal limiting. It also allows for local and remote line hold switching, and momentary or permanent latching remotes can be enabled. The HY-03 also includes a balanced mic/line input, balanced output, and the option for a mixed output for recording both sides of a telephone conversation. It also has an integrated ring detector for automatic call answering and is fitted with K-break disconnect detection as standard.
The HY-03 also features a line limiter, bandpass filter, and output noise gate with preset threshold for crystal clear audio. It has 28dB typical line balance rejection and a built-in power supply with switchable mains input. It is compliant with European PTT specifications and has been approved by BABT. Overall, the HY-03 offers an excellent value for a high-quality telephone hybrid with a range of useful features.
Included in box
1x RJ11 to RJ11 telephone line lead
1x RJ11 to BT plug telephone line lead
1x BT handset socket to RJ11 plug adapter
1x IEC mains lead fitted with moulded mains plug
1x Handbook
1x Warranty card
About the Sonifex HY-03 Telephone Hybrid
The analogue HY-03 telephone hybrid is the replacement for the HY-02, which for many years has set the standard as an excellent value, high quality telephone hybrid.
The HY-03 retains many of the features of the HY-02 and adds some additional ones. Some of the features of the HY-03 include:
Fully automatic – adapts to varying line conditions and has automatic signal limiting.
Local and remote line hold switching – calls can be remotely switched through a mixing console.
Momentary or permanent latching remotes can be enabled.
Balanced mic/line input – 10k ohm balanced input selectable for 0dBu clean feed line, or microphone level with adjustable gain.
Balanced output – 0dBu low impedance balanced output, with output gain adjustment.
Mixed output – the output can be a mix of the caller and mic/line input signals for recording both sides of the telephone conversation.
Integrated ring detector – automatic call answering after a pre-determined number of rings.
Fitted with K-break disconnect detection as standard with an option for dial-tone disconnect using the optional HY-03DTD board. The HY-03DTD board can be configured to disconnect on recognizing the dial tone used in a specific country.
Line limiter, bandpass filter and output noise gate with preset threshold providing low distortion crystal clear audio.
28dB typical line balance rejection.
Built in power supply with switchable 115V, or 230V, mains input.
BABT approval compliant with European PTT specifications.
Audio Specification
nput Impedance – Line Mode (Clean Feed)	10kΩ balanced 0dB
Input Impedance – Microphone Mode	200Ω balanced
Clean Feed Limiting Input	+4dBu
Microphone Level Range	From 74dB to 40dB adjusted by preset pot
Bandwidth to Telephone Line	250Hz – 4kHz, -3dB ref 1kHz
Telephone Line Impedance	Nominally 600Ω
Telephone Line Impedance Range	300Ω to 1500Ω
Output Impedance	50Ω balanced floating 0dBu
Output Level Range	+8dB to -14dB adjusted by preset pot
Rejection Ratio	45dB on 1kHz tone, typically 28dB on complex waveforms, reference peak level of 0dB
Ring Detector Sensitivity	1 ring to 6 rings
Power	230V 50Hz, or 115V 60Hz. 6W for HY-03.
Connections
Mic/Line Input	XLR 3 pin female with push button mic/line selection
Line Output	XLR 3 pin male
Telephone Line	RJ11 6/4 socket
Telephone Handset/Instrument	RJ11 6/4 socket
Remotes	9-way D-type socket
Power	IEC mains (CEE22)
Fully automatic – adapts to varying line conditions and has automatic signal limiting
Local and remote line hold switching – calls can be remotely switched through a mixing console
Momentary or permanent latching remotes can be enabled
Balanced mic/line input – 10k ohm balanced input selectable for 0dBu clean feed line, or microphone level with adjustable gain
Balanced output – 0dBu low impedance balanced output, with output gain adjustment
Mixed output – the output can be a mix of the caller and mic/line input signals for recording both sides of the telephone conversation
Integrated ring detector – automatic call answering after a pre-determined number of rings
Fitted with K-break disconnect detection as standard with an option for dial-tone disconnect using the optional HY-03DTD board. The HY-03DTD board can be configured to disconnect on recognizing the dial tone used in a specific country
Line limiter, bandpass filter and output noise gate with preset threshold providing low distortion crystal clear audio
28dB typical line balance rejection
Built in power supply with switchable 115V, or 230V, mains input
BABT approval compliant with European PTT specifications






		
		
		