The Signature UBBU4 is a broadcast specification twin stereo unbalanced to balanced, and balanced to unbalanced analogue audio interface that is equally suitable for professional & home studio use.

It is most commonly used for interconnecting domestic type recording/ playback devices to broadcast/ professional equipment.

Its primary job is to interface domestic type audio outputs (unbalanced) to the balanced audio inputs on broadcast and professional audio equipment while simultaneously connecting balanced outputs from professional equipment to the unbalanced inputs on domestic products.

As well as providing the balancing interface the UBBU4 also provides variable gain/ loss to allow the two connected pieces of equipment to match audio levels.

All the stereo circuits can both work as dual mono. All the inputs are electronically isolated with RF filters to prevent extraneous signals, and fed via multi-turn preset gain controls on the rear panel to their outputs.

The rear panel gain controls are multi-turn presets to allow accurate gain setting and are also recessed to prevent accidental movement.

Power is provided by an internal switch mode power supply, with a wide input range. There is also an input for external +/-12V DC power. The +/-12V DC input can be connected to the optional Signature PS1 external DC Master Power Station, for situations where a redundant power supply is desirable.

A bright front panel LED indicates that the unit is operational.

May be delivered with a black finish

AUDIO BALANCED TO UNBALANCED

Frequency Response @ Line up: <+/-0.1dB 40Hz to 20kHz
Gain Range: -15dB to +15dB on each output
Line Up Level (with 0dB Gain): -12dBu on unbalanced input = 0dBu on balanced output
Maximum Input Level: +28dBu
Maximum Output Level: +24dBu
Input Impedance: >50k Ohms
Output Impedance: Distortion ref +dBu output: 
          0.04% THD @ 100Hz
          0.04% THD @ 1kHz
          0.04% THD @ 10kHz
Noise: -103dB @ lineup unweighted RMS 22Hz to 22kHz ref -4dBu output
Interchannel Crosstalk: >-90db @ lineup 1 - 15kHz
Input Type: Electronically balanced on Neutrik XLRs
Output Type: Single ended on gold plated RCA phono sockets

AUDIO UNBALANCED TO BALANCED

Frequency Response @ Line up: <+/-0.1dB 40Hz to 20kHz
Gain Range: -18dB to +10dB on each output
Line Up Level (with 0dB Gain): 0dBu on balanced input = -12dBu on unbalanced output
Maximum Input Level: +28dBu
Maximum Output Level: +20dBu
Input Impedance: >22k Ohms
Output Impedance: Distortion ref 0dBu output: 
          0.04% THD @ 100Hz
          0.04% THD @ 1kHz
          0.04% THD @ 10kHz
Noise: -98dB @ lineup unweighted RMS 22Hz to 22kHz ref +8dBu output
Interchannel Crosstalk: >-90db @ lineup 1 - 15kHz
Input Type: Electronically isolated on gold plated RCA phono sockets
Output Type: Electronically balanced on Neutrik XLRs

POWER

Mains Input: Filtered IEC, 100 - 240VAC (+/-10%) 47 - 63Hz
AC Consumption: 2.9 Watts
DC Input: 4 Pin Neutrik XLR plug +/-12V
Internal Fuse: 20mm 1A Anti surge

PHYSICAL

Size: 445 x 123 x 44mm (LxDxH) no rack ears
         482mm 19" (1RU) with rack ears
Weight: 1.10Kg
Mechanics: All aluminium construction, anodised and laser etched
Shipping Carton: Rugged export quality cardboard carton 610 x 420 x 130mm
Shipping Weight: 2.4Kg

INCLUDED ITEMS

Mains Lead: 2 metre long (UK & Europe only)
Rack Bolts: 4 off Pozi head M6
Feet: 4 off rubber stick on feet
Handbook: Full A4 handbook available to download and linked by QR code on device

• UBBU Manual
• UBBU2 4 Quick start guide
• UBBU4 Brochure v3

Please use one of the following methods to contact us:

Telephone: 01622 753662
International: +44 1622 753662
Email: sales@glensound.com
Skype: live:marc_8167
Online: contact form