Click Here For Full Size Picture

Click Here For Full Size Picture


This distribution amplifier drives multiple isolated
line feeds from a single input source.
The DA-2 is ideal for driving lines to multiple
amps in live sound applications, distributing
audio to multiple tape decks, feeding stereo signals
to multiple zoned locations, etc.
This 1U stereo audio distribution amplifier features
four outputs per channel. Each output is ground
lifted and has its own level control and clip
indicator light. Input signals are monitored by
signal-present LEDs and clip LEDs. The headphone
circuit can be switched to monitor either channel.
A combine switch applies both inputs to all 8 outputs,
making the DA-2 a one-or two-in, eight-out DA.
All audio connections are made through actively
balanced line level XLR connectors.
Where transformer isolation is necessary, the
ISO-8 (a 1U 8-channel accessory) is available.

Frequency Response: 20Hz-20kHz 0.3dB
Maximum Input level: +22dBu
Input Impedance: 1M Ohm
Common Mode Rejection: 90dB at 60Hz
Maximum Output Level: +22dBu
Output Impedance: 112 Ohm
S/N at 0dB Input, 0dB Gain: 87dB
Rise Time: 3S
Total Harmonic Distortion: 0.004% @ 1kHz
Output Channel Separation: 74dB
Headphone Impedance: 75 Ohm minimum
Channel Output Gain: 18dB
Power Requirements: 115/230VAC



Click Here For Larger Size Picture
The Whirlwind LD410 Line Driver is the ultimate tool for matching audio equipment signal levels. The LD410 is both a professional quality, sonically superior -10 to +4dB to 10dB level converter and a flexible multichannel distribution amplifier and is housed in a single rack space enclosure.

Each of the LD410 eight output channels feature gain controls, LED metering and mute buttons.

There are also eight input channels utilizing the highest quality, low noise preamplifiers with 14dB input pads that can be engaged to attenuate high input signals. The LD410 is factory configured with four channels of -10dB to +4dB conversion (RCA input jacks to male XLR outputs) and four channels of +4dB to -10dB level conversion (female XLR inputs to RCA output jacks).

Inputs to channels 3, 4, 7 and 8 are provided either balanced (via the screw terminal block) or unbalanced (via RCA jacks).

Outputs 1, 2, 5 and 6 are provided balanced (via the screw terminal block) AND unbalanced (via RCA jacks). Each output is fed with a separate driver so that both the balanced and unbalanced outputs may be used simultaneously. A +6dB boost is added to the unbalanced output to compensate levels.

Assignable signal routing jumpers inside the LD410 permit the creation of multiple distribution amplifiers by allowing multiple outputs to receive their signals from a common input.

The LD410 has an internal power supply, which can be set for 115VAC or 230VAC by changing internal jumpers.


  • Four channels of +4dB to 10dB level conversion, female XLR to RCA phono.
  • Four channels of 10dB to +4dB level conversion, RCA phono to male XLR.
  • All eight outputs have -38dB to +38dB variable gain controls.
  • Multiple outputs can be assigned to a common input, functions as a DA.
  • LED metering for -10dB, +4dB, output and input clip indication.
  • Mute switches on each output.
  • Switchable 14dB pads on each input.
  • Screw terminal block allows balanced signal connections to all channels.

For a more detailed explanation of the numerous features found in the LD410, please download the owner's manual here .

1ST Audio USA
2844-46 Dewey Avenue
Rochester, NY 14616
(585) 621-6270
Please call or email for Prices
e-mail - dave@1staudiousa.com

1ST Audio USA