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    • RDL ST-UBA2 Unbalanced to Balanced Amplifier - 2 Channel

      RDL ST-UBA2 Unbalanced to Balanced Amplifier - 2 Channel

      The ST-UBA2 is used in any application requiring conversion from unbalanced consumer format signals to professional +4 dBu. It may be used to balance audio from CD players, cassette decks, computer sound cards, televisions, and a wide variety of other unbalanced sources. The mono sum output may be used to drive patch-bay jacks, monitors or subwoofer amplifiers. Separate Dual-LED VU metering is provided for the left and right outputs. A green LED illuminates at 15 dB below +4 dBu. The intensity...

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      Item #: ST-UBA2

      Availability: In Stock

      Our Price: $154.90

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    • RDL STA-2A Dual High Gain Line Amplifiers

      RDL STA-2A Dual High Gain Line Amplifiers

      The STA‑2A is a dual‑channel, line‑level audio preamplifier. Each channel is identical. The audio inputs are bridged at 20 kΩ and accept either an unbalanced or a balanced audio signal. Gain is adjustable from unity to +24 dB using a 25‑turn precision audio taper trimming potentiometer. The output line driver circuits are designed to drive long balanced audio lines into 600 Ω loads. The STA‑2A features wideband circuitry for excellent phase response, low...

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      Item #: STA-2A

      Availability: In Stock

      Our Price: $151.06

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    • Rolls RM85 Two Zone Mic/Line Mixer

      Rolls RM85 Two Zone Mic/Line Mixer

      The RM85 is an 8 channel two zone mixer. Channels 1-4 will accommodate XLR microphone or XLR line level inputs. Channels 5-8 are 1/4" inputs. All 8 channels can be sent to the two XLR outputs in three configurations; A, B or both A+B. The separate A and B outputs are XLR and either can be selected to be Line or Microphone level output. Channel 8 also has a stereo 3.5mm (1/8") input on the front of the RM85. Features: Four XLR balanced inputs with +48 V phantom power Four stereo...

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      Item #: RLS-RM85

      Availability: Direct Ship From Manufacturer

      Our Price: $379.00

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    • RDL STA-1 Dual Balanced/Unbalanced Line Amplifier -12 to 20 dB Gain

      RDL STA-1 Dual Balanced/Unbalanced Line Amplifier -12 to 20 dB Gain

      The STA-1 is a dual-channel line-level preamplifier with bridging inputs, adjustable gain or loss, and low-impedance outputs. Each of the two identical circuits is both an electronic line transformer and a line amplifier. Hook up the STA-1 just like a pair of audio transformers with gain. True dc amplifiers produce unsurpassed audio clarity, high common-mode rejection, ultra-low distortion and low noise. The STA-1 is perfect for most line amplification, impedance or balanced/unbalanced conversion. The...

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      Item #: STA1

      Availability: In Stock

      Our Price: $150.28

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    • Jensen JT-11-BMCF Line Output Audio Transformer

      Jensen JT-11-BMCF Line Output Audio Transformer

      1:1 BIFILAR WINDINGS This transformer is designed for ultra-high performance line output stages.Specially processed 80% nickel core alloy is used for lowest possible harmonicdistortion of high level low frequency signals. For best performance, driving signalsshould be free of DC and source impedance kept as low as possible. Specifications: Distortion 0.002% typ at 20 Hz and +4 dBu output level Wide bandwidth: !3 dB at 0.15 Hz and 15 MHz Drives 600 S loads to levels up to +27 dBu at...

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      Item #: JT-11-BMCF

      Availability: In Stock

      Our Price: $94.95

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    • Atlas TSD-ML22VCA 2x2 Mic/Line Preamp and VCA

      Atlas TSD-ML22VCA 2x2 Mic/Line Preamp and VCA

      The Atlas TSD-ML22VCA is a 2 input, 2 output true VCA with enhanced features including a high quality microphone pre amplifier. VCA's inserted prior to amplification provide a far more efficient solution than transformer-based attenuators for volume adjustment in high power music applications. The dual channel design can provide level control for two separate discrete zones or stereo sources and is perfect for use in sports bars, restaurants, hotels or other installations. The...

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      Item #: ATL-TSD-ML22VCA

      Availability: Usually ships in 3-10 business days

      Our Price: $221.99

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    • RDL EZ-PH1 Stereo Phono Preamplifier

      RDL EZ-PH1 Stereo Phono Preamplifier

      The EZ series offers unparalleled flexibility. Each unit is fully labeled on the front and rear for use either as a finished product or as a utility module. Installation of multiple products is quick and easy using the comprehensive range of EZ rack mounts, chassis, bezels, drawers and accessories. High quality full-size switches, long life controls, quality connectors, solid-state audio and video switching, gold plating and superior engineering combine to make EZ the best value in the industry....

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      Item #: EZ-PH1

      Availability: Usually ships in 3-10 business days

      Our Price: $102.43

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    • JLCooper MLA-10 4 In 4 Out MIDI Line Amplifier - Rack Mount

      JLCooper MLA-10 4 In 4 Out MIDI Line Amplifier - Rack Mount

      JLCooper Electronics extends the distance of MIDI with the MLA Series - MIDI Line Amplifiers. They let you effectively extend MIDI cable length using twisted pair wire or a standard audio snake. MIDI Line Amplifiers are specifically designed for sending MIDI data over long distances with the capability to send information in excess of 1000 feet. Ideal for touring systems or permanent installations, MLA's can be used in schools, recording and production facilities, board- rooms, live performances,...

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      Item #: JLC-MLA-10

      Availability: Direct Ship From Manufacturer

      Our Price: $543.49

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    • JLCooper MLA-XLR MIDI Line Amplifier Over Balanced Audio Cables

      JLCooper MLA-XLR MIDI Line Amplifier Over Balanced Audio Cables

      MLA-XLR is a single channel, bidirectional, long distance amplifier or driver for MIDI signals. It extends the range of MIDI to over 1000 feet using standard balanced audio lines (audio snakes, mic cables, etc.). MLA-XLR is refreshingly simple to use. There are no settings to configure. Just plug in the power supply and connect two MLA- XLRs together with a pair of standard mic cables. Then, connect your MIDI gear as you would normally. While the MIDI protocol specifies a...

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      Item #: JLC-MLA-XLR

      Availability: Usually ships in 3-10 business days

      Our Price: $279.95

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    • Palmer Audio PLDB02 Line Driver and Booster

      Palmer Audio PLDB02 Line Driver and Booster

      Balancing and boosting weak unbalanced signals, the PLDB02 is the perfect solution where signal integrity must be maintained over long cable runs. Unlike common active DI boxes, the PLDB02 provides up to 18 dB of signal boost in 6 dB steps making unbalanced -10 dBV consumer equipment compatible with the professional studio level. The balanced PLDB02 output provides lossless signal transfer via microphone cable lengths of up to 100s of yards. If required, the companion PLDB02R matchbox unbalances...

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      Item #: PLM-PLDB02

      Availability: In Stock

      Our Price: $329.95

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    • QSC SPA4-60 1/2 RU 4 Channel ENERGY STAR Low Impedance Amplifier

      QSC SPA4-60 1/2 RU 4 Channel ENERGY STAR Low Impedance Amplifier

      The SPA Series amplifiers from QSC are two half rack 1U, convection cooled power amplifiers delivering two or four channels of 60 watts per channel into 4Ω and 8Ω. These amps can also be bridged to supply 200 watts into 4Ω and 8Ω, and up to 250 watts into 70V or 100V loads making them extremely flexible for Low-Z or High-Z applications. Utilizing an advanced Class-D amplifier design and Universal Power Supply the SPA Series are amazingly efficient allowing them to be convection...

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      Item #: QSC-SPA4-60

      Availability: In Stock

      Our Price: $835.00

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    • Radial J Plus-4 Stereo -10dB to Plus-4dB Line Driver

      Radial J Plus-4 Stereo -10dB to Plus-4dB Line Driver

      The Radial J+4 is a stereo interface designed to accept unbalanced low output level devices such as instruments, computers or CD players and boost the signal to a balanced +4dB level for easy manipulation in professional environments such as broadcast, recording studios and live touring. The design begins with 100% discrete components for optimal signal transfer. Careful attention has been paid to eliminate noise by combining the advantages of active signal buffering with transformer isolation....

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      Item #: RAD-J4

      Availability: Usually ships in 3-10 business days

      Our Price: $229.99

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    • Bellari PA550 3 Channel Preamplifier

      Bellari PA550 3 Channel Preamplifier

      The PA550 is a sleeper. It has so much gain potential that it will drive any amplifier made with ease, and not even break a sweat. The amount of headroom available in the PA550 can only be rivaled by pre's that cost enough to drain anyone's bank account. The PA550 tone is full bodied, letting you know right away that all frequencies are covered and nothing is masked. It never gives you the impression that it is making the treble too shimmery, or that the bass response has been overly...

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      Item #: RLS-PA550

      Availability: Usually ships in 3-10 business days

      Our Price: $129.00

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    • Bellari PA555 Preamplifier

      Bellari PA555 Preamplifier

      The Bellari PA555 Preamplifier doesn't just sound "good for the money", the PA555 sounds "good for any amount of money." We hope you're enjoying the current retro music trends especially with vinyl, tube tuners and turtables. Bellari wants to further enhance your listening experience by offering the PA555 an essential piece of gear that wull make listening to your music collection more rewarding. Bellari has built a product specifically for you vinyl and retro lovers but doesn' tsimply...

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      Item #: RLS-PA555

      Availability: Usually ships in 3-10 business days

      Our Price: $275.00

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    • Bellari PP532 Passive Preamp

      Bellari PP532 Passive Preamp

      The PP532 pre amplifier, is a completely passive design with absolutely nothing added to your audio signal path. That means no power required, no electronics used and no distortion will ever be added to your music. It is the most effective way to reach high-end audio quality, and you will save enough coin that you can buy the more expensive speakers you have been eyeing. The chassis is made from .090 steel, meaning it is 3 times thicker than most chassis. Four pairs of RCA inputs...

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      Item #: RLS-PP532

      Availability: Usually ships in 3-10 business days

      Our Price: $99.00

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    • Bellari VP549 Phono Preamp

      Bellari VP549 Phono Preamp

      The Bellari VP549 phono pre has excellent true sound resolution. It's tone center is right in the middle of the music. It performs very well on the extremes, and never looses its solid performance in the meat of the music. Has a well rounded sound when needed, but has a very surprising shimmer when called on. The VP549 is bold, yet has a very surprising attack that will take your rig to the next level. Hundreds of hours went in to listening and improving the design. All Bellari...

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      Item #: RLS-VP549

      Availability: Usually ships in 3-10 business days

      Our Price: $149.00

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    • RDL ST-TC1 Telephone System Coupler - CO Line Simulator

      RDL ST-TC1 Telephone System Coupler - CO Line Simulator

      The ST-TC1 is intended to be connected to an on-site telephone system switching unit KSU. It is NOT intended to be connected directly to a telephone CO line. Connections from the ST-TC1 go into the telephone switching unit as if the ST-TC1 was an incoming phone line. When the KSU seizes the line to the ST-TC1, a relay contact closure is provided which can be used to control a variety of equipment, such as a paging system or radio system. The closure is maintained as long as the line is seized....

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      Item #: ST-TC1

      Availability: Usually ships in 3-10 business days

      Our Price: $104.98

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    • RDL ST-VCA3 Voltage Controlled Amplifier

      RDL ST-VCA3 Voltage Controlled Amplifier

      The ST-VCA3 is used in applications requiring smooth audio level control from a remote control panel, potentiometer or dc voltage (0 to 10 V). Installation in series with the audio input of a power amplifier allows remote control of that amplifier's level. For installations where it is preferred to keep the audio localized in the rack, audio controls are extended outside the rack from the ST-VCA3. Many installations benefit from avoiding long-term potentiometer wear from audio running through the...

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      Item #: ST-VCA3

      Availability: In Stock

      Our Price: $122.67

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    • RDL STA-1M Audio Line Amplifier - Mono: -14 to 14 dB Gain

      RDL STA-1M Audio Line Amplifier - Mono: -14 to 14 dB Gain

      The STA-1M allows bridging any audio line, adjusting the gain, and driving a balanced or unbalanced line. The circuit design allows the input to accept either balanced or unbalanced signals, of either high or low impedance. This is an instrumentation type input stage which will amplify the differential input, regardless of ground reference. The output is capable of driving either high or low impedance loads, and the output may be connected either balanced or unbalanced. RDL's SupplyFlex power...

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      Item #: STA-1M

      Availability: Usually ships in 3-10 business days

      Our Price: $110.20

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      Audio Line Amplifiers

      Audio line amplifiers can be purchased in balanced, unbalanced, mono or multichannel configurations and Markertek carries them all! Audio line amplifiers provide varying degrees of gain, depending on your application requirements. Line amplifiers can be used to match signals between CD players, cassette decks, computers and professional audio equipment. If you aren't sure which Audio line amplifier is right for you, contact a Markertek representative today.

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