Model 898A 8 Channel Balanced/Unbalanced Line Level Translator

Updated May 3rd, 2023

Model 898A Datasheet and Specifications PDF
Model 898A Operation Manual PDF
Model 898A Purchase Online

The 898A version has been replaced by the 898B version

General Description:
The Sonic Imagery Labs, Model 898A is a high performance professional grade tool used to convert unbalanced -10 dBV consumer line level audio signals to balanced +4 dBu professional levels - and vice versa. The only product available that provides 8 channels each direction, simultaneously.

Signal to noise and common mode rejection performance are perfectly preserved by using the 898A, since it incorporates precision laser trimmed components that are fully specified for high performance audio applications and have outstanding AC characteristics, including ultra low harmonic distortion (0.0005% at 1KHz), the ability to drive capacitive lines and remain stable, and high slew rate (15V/uS).


The Model 898A was designed for professional use in professional live audio and state of the art studio audio and broadcasting systems and its features include the following:

• 8 Channels of -10dBV to +4dBu Conversion
• 8 Channels of +4dBu to -10dBV Conversion
• Ultra Precision Laser Trimmed Line Receivers
• Precision Laser Trimmed Balanced Line Drivers
• Ultra Low Total Harmonic Distortion and Noise
• DC to 200Khz Bandwidth (direct coupled)
• High Current Output Drive in both directions
• +25dBu Maximum Levels
• Ability to drive 300 ohm Minimum Loads
• RCA & XLR Interface Connections
• Channel to Channel Crosstalk > -105dB
• Designed and manufactured in the USA

The Sonic Imagery Labs Model 898A’s one rack space package and performance provides the answer to the most demanding applications requiring precision level conversion and input / output line balancing and unbalancing.

-10 dBV to +4 dBu (RCA Phono Input to XLR3-1 Output)
Unbalanced to Balanced Direction

• Nominal input reference level -10 dbV(0.316Vrms)
• Nom. input ref. level channel to channel accuracy +/-1%
• Bandwidth DC-175Khz +0 -0.2dB
175kHz-250Khz +0 -1dB
375Khz -3dB
• THD+Noise@1Khz, Rload 600 ohms Vo=10Vrms 0.0005%
• Noise Floor, 20Khz BW, RTO -98dBu
• Headroom, THD+Noise<1%, RTO +26.5dBu
• Output DC Offset, 600 ohm Rload +/-50mV typical
• Input Impedance 10K ohm
• Output Impedance 50 ohm

+4 dBu to -10 dBV (XLR3-1 Input to RCA Phono Output)
Balanced to Unbalanced Direction

• Nominal input reference level +4 dBu (1.228Vrms)
• Nom. input ref. level channel to channel accuracy +/-1%
• Bandwidth DC-20Khz +0- 0.2dB
20kHz-40Khz +0-1dB
75Khz -3dB
• Common Mode Rejection, Vcm+/-46.5V, Rs 0 ohm 90dB
• THD+Noise@1Khz, Rload 600 ohm Vo=10Vrms 0.0005%
• Noise Floor, 20Khz BW, RTO -106dBu
• Headroom, THD+Noise<1%, RTO +24dBu
• Output DC Offset, 10Kohm Rload +/-2mV typical
• Input Impedance 24Kohm differential
18K ohm common mode
600 ohm user insertable
• Output Impedance 100 ohm


• Unit Size 1.75" Height x 19.0" Wide x 3.5" deep
• Weight 4 pounds (3 Kg)

Contact us directly for OEM and quantity pricing.

All specifications subject to change without notice. The information provided herein is believed to be reliable; however; Sonic Imagery Labs assumes no responsibility for inaccuracies or omissions. Sonic Imagery Labs does not warrant or authorize any Sonic Imagery Labs products for use in life support devices and or systems.

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PO Box 20494, Castro Valley, California, 94546
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