Aphex 120B 1x4 Distribution Amplifier

PA SKU # APH 120B MFR # 120B UPC # 693714012010
  • Support Lifetime Tech Support!
  • Support 30 Day Returns!
  • Best Seller Best Seller!
  • Question Ask a Question
Order Now! We'll Ship It Fast! This item is currently out of stock. Most out of stock orders ship within just a few days (excluding weekends and holidays). We'll keep you up to date the whole way.
  • Product Highlights
  • Multi-Zone Audio or SMPTE Distribution
  • Four Independent Volume Controls
  • High Impedance Inputs Enables Bridging
  • No Ringing or Overshooting
  • Low Impedance Outputs For Long Lines
  • Transformerless Circuits
  • Common-Mode Rejection Circuits
  • Electronically Servo-Balanced Outputs

Servo Balanced Audio Distribution Amplifier

Transformerless High Performance Audio Distribution
Model 120B is a high performance audio distribution amplifier with a single high impedance input and four low impedance outputs, all electronically servo-balanced and designed to be as transparent as possible. The 120's transformerless circuits are designed for wide, flat frequency response, free from ringing or overshoot, making it ideal for distribution of time code or audio. Each output has its own amplifier and level control for maximum versatility and isolation. The sturdy steel chassis may be used stand-alone or rackmounted, singly or in pairs.

The input circuit is adjusted for optimal common-mode rejection. Servo-balancing compensates for high common-mode voltages, so headroom isn't sacrificed. The high input impedance allows bridging of the input signal with minimum loading. This way several amplifiers can be easily driven from the source.

The individual output amplifiers are very low impedance so long lines and capacitive loads are easily driven with no loss of stability or high frequency response. Servo-balancing permits the outputs to be used single-ended at any time without a change in gain by simply grounding the unused pin. Individual output level controls are recessed for bump-proof operation, yet can be easily adjusted without tools. The front panel power LED also acts as a signal present and clip indicator for the input.
  • 1 input/4 output with output trim adjustments
  • Transformerless design for wide, flat frequency response
  • Works for audio or time code
  • Frequency Response: 5Hz - 100 kHz (+0, -0.5dB)
  • Dynamic Range: 94 dB
  • Hum and Noise: Better than -90 dBm at unity gain
  • THD: 0.002% @ +4dBm, 0.005% @ +20dBm
  • IMD: 0.002% @ +10dBm
  • Channel Isolation: 70dB
  • Slew Rate: 13 V/usec
  • Connector: XLR 3-pin Female
  • Type: Transformerless, differential servo balanced
  • Impedance: 100k ohms balanced
  • Maximum Level: +25 dBm
  • CMRR (typical): > 45 dB
  • Connector: XLR 3-pin Male
  • Impedance: 65 ohms
  • Maximum Level: +25dBm into 600 ohms balanced, +21dBm unbalanced
  • Output Gain Range: ±15 dB
  • Power Requirements: 100, 120, 220, OR 240 VAC, 50-60Hz
  • Dimensions: 1.75"H x 8.25"W x 7.25" D (44.5mm x 209.5mm x 184.2mm)
  • Net Weight: 3.5 lbs (1.6 kg)
Write Your Own Review
You're reviewing:Aphex 120B 1x4 Distribution Amplifier
Your Rating
Performance Audio, LLC BBB Business Review
Verified by Comodo Secure

We Accept Visa Credit/Debit Cards
We Accept American Express Credit/Debit Cards
We Accept Mastercard Credit/Debit Cards
We Accept Discover Credit/Debit Cards
We Accept PayPal Payments and Financing
We Accept Bank/Wire Transfers
We Offer Financing
Copyright © 2019. All rights reserved. Follow us on Facebook Follow us on Twitter Follow us on Instagram Follow us on YouTube Follow us on Pinterest